单词 | Grating |
例句 | (1) Leaves clogged the grating over the drain. (2) The grating protected a window in the men's room. (3) She recognized the grating voice of Dr. Sarnoff. (4) The sound of his grating voice complaining all day was driving me crazy. (5) A drunk and disorderly can clattered on a grating. (6) The grating broadcasts sometimes switched to tapes of radio call-in shows and other background sounds of an electronic civilization. (7) The faint grating caused by that supreme effort was what Biff had detected in his beast-brain. (8) The statue slowly slithered off his body; a grating noise as it hit the floor. (9) Butter the bread and sprinkle on a grating of nutmeg or pinches of allspice. (10) For one thing, it was another grating example of Western media zooming in on what to them was sensational exotica. (11) Calls a short high-pitched whistle and a harsh grating note. (12) The liquor store had a metal grating separating the customers from the wares. (13) The luminance profile of a typical grating pattern is shown in Figure 4.3. (14) A grating is a set of tight and dark stripes, usually of equal width. (15) This involved grating soap, microwaving it and finally putting it through a food processor. (16) Great idea: before grating orange or lemon peel, run the grater under the cold tap to prevent sticking. (17) He gave only one kind of sound, a grating, even-toned grunt that lasted about one second. (18) The entrance to the drain is covered by a heavy iron grating. (19) That is to say, there is a way of positioning the grating relative to the receptive field centre that results in no response. (20) We could hear a group of tourists[Sentencedict], talking in loud grating voices. (21) It is a good idea to take off the grating occasionally and clean out any debris. (22) The lower curve shows the light intensity at the centre of the receptive field as a sinusoidal grating drifts across it. (23) A speeding motor boat sliced the waters with the grating noise of a buzz saw. (24) Down in the Mootwalk a woman laughed and from the water a swan gave its harsh, grating cry. (25) She has a one-note shtick which is sometimes cute, never clever, and after a while, grating. 2. (26) Wes's greatest triumph was undoubtedly the time he removed the grating from the coal cellar outside Skeldale House. (27) The weight of the shot drew it down through the grating and out of his sight like a skittering lizard. (28) The machine began to spin faster and faster, with the grating screech of metal on metal. (29) Gullies often become blocked by dead leaves and small stones which fall through the grating. (30) The gangplank that linked the slipway to the boat shifted to and fro with a grating sound. (31) He explained why the grating, dissonant passages in the music were also vital. (32) Rincewind tried to shut his ears to the grating voice beside him. (33) The main grating fix up in the gyre axis. (34) Grating is the main sensor in precision measure field. (35) I don't like that woman with a grating voice. (36) The grating spectrograph is built in two designs. (37) The cook is grating a carrot. (38) Grating Pacific offers two distinct types of wire cloth. (39) The spectral characteristics of superstructure grating DBR ( SSGDBR ) semiconductor lasers were modeled using transfer matrix method. (40) The index of plastic stereo grating blade high, with good gloss. (41) The wavelength demodulation technology of fiber Bragg grating is critical for its practical application. (42) A new passive device, plastic fiber grating, is proposed based on our researches on fiber grating tunability and plastic fibers. We analyzed its characteristics. (43) Results: The tunable external cavity semiconductor laser based on grating light valve can select at will output or filtrated corresponding wave-packet magnitude. (44) Yevlenko was standing with both hands on the desk, grating out sarcastic words. (45) It emphasizes the main modules including laser drawing machine, software and grating image processor. (46) The hardware of the system is made up of P89C61X2BA as main processor, USBN9604 as USB interface, grating signal-processing circuit, XC95108 as signal subdivision, sensing, counter circuit and so on. (47) With temperature-sensitive fiber Bragg grating wrapped into the coil winding, we manage to measure the internal temperature of coil winding directly. (48) A new technology for fabrication of silica on silicon arrayed waveguide grating (AWG) based on deep etching and thermal oxidation is presented. (49) A new magnetic field measurement based on the Faraday effect and the measurement of differential group delay (DGD) in fiber grating was proposed. (50) Bleached food, excess of starch or excess of white bread can lead to nerve grating effect. (50) try its best to collect and build good sentences. (51) The results show that diffraction efficiency of a lossless grating increases with the higher ratio of reference beam width to object beam width. (52) The effects of the thickness of metallic film and grating period on the refractive index sensitivity of the device are analyzed in detail. (53) After I/V conversion, inverse function transformation, differential and calculation circuits, the Doppler shift can be obtained. Then the time-dependent velocity of the moving grating can be given. (54) Based on Fourier analysis of spatial frequency filtering, the variations in frequency of grating image in the spatial filtering experiment are discussed, in which the input is a grating-like object. (55) The property of peak wavelength of slanted reflection hologram grating was discussed. (56) Surface treatment mode of grating : Hot dipped galvanization: galvanization should be carry out after basic work. (57) The feasibility of the virtual grating phase-shifting moire fringe method is achieved by comparing the results with those of ZYGO's. (58) CW laser output has been obtained from the other channel with a grating and its frequency can be tuned by a PZT. (59) The series density formulae of the binary phase grating are obtained from the general complex amplitude transmittance formulae through Fourier integral. (60) A novel method of edge filter demodulation for fiber Bragg grating that use wavelength tunable laser was proposed. Real-time monitoring of the multiple points' dynamic strain could be achieved. (61) This paper introduces optical characteristics and spectral characteristic of optical fiber Bragg grating, introduces the experiments of grating fabrication with phase masks. (62) In order to prevent from data fault during power failure, grating torque sensor provides absolute zero position signal with zero position grating. (63) The construction of the encoding fiber Bragg grating sensor array and the characteristic of its sensing signal are introduced. (64) A new kind of edge lit circular viewing rainbow hologram is presented in this paper, which uses a wave guided grating as illuminator. (65) In this paper, An absolute measurement method by two dimension zero position grating is presented. (66) One kind of all-fiber structure sensing system is designed based on the long period of fiber grating as edge filter to interrogate the sensing signal of the FBG sensor. (67) The paper mainly discusses the principle of two dimension zero position grating and its evaluation index, gives detail discussion of evaluation limit. (68) The schematic of a novel transmission grating spectrograph and the preliminary experimental results are described. (69) A novel slim FBG (Fiber Bragg grating) sensor device and its application in the real-time dynamic shape detection of colonoscope are presented. (70) A flat - field etched diffraction grating ( EDG ) wavelength demultiplexer is much more convenient in fabrication. (71) The principle of projection type micro optical encoder has been described and the optics theory of grating imaging is deduced. (72) A method for suppressing the regular bands parasitic oscillation caused in the sequence laser amplification by placing a glaring grating is introduced. (73) All surface channel inside E. V. A. shall be covered with "NONROC" heavy duty tee frame transverse bar trench grating or similar approved. (74) The average saturation space-charge field is small and the diffraction efficiency is low as a result of the non-uniformity of the grating. (75) Moire fiber grating ( MFC ) is a new kind of passive components. (76) Good photon sensitivity, large index modulation and high resolution make monomer in a number of applications such as holographic polymer grating(), photonic crystal and light phase modulator. (77) Study encoding Fiber Bragg Grating sensing system by experiment and expound its market application. (78) That transmission rate and the FWHM of the fiber grating FP are very sensitivity for radial strain. But the central wavelength, mode number of the fiber grating FP are insensitivity for radial strain. (79) At the same time, the characteristics of the LPG temperature sensing about different cladding calorescence coefficient or grating period are showed. (80) The theory and experiment techniques about measuring the thermal diffusivity of solid materials by using laser induced transient reflecting grating is introduced. (81) With the improving technic and the emergence of more and more advance research production , fiber Bragg grating(FBG) had become one of the most successful optic passive device. (82) The industrial grating signals can be digital frequency multiplication with a phase-locked loop (PLL) controlled by a microcomputer. (83) The double grating monochromator structure of pure rotational Raman lidar is introduced and the corresponding lidar equation is deduced. (84) The influence of quadrupole, annular and binary grating illumination on resolution and depth of focus have been investigated in sub micron i line exposure system. (85) Experimental results. show that the step number and ratio between the etching depth and the light wavelength are closely associated with the diffraction efficiency of reflection step grating. (86) The principle of the circular grating optical scanning holography and the experimental results are presented. (87) Yes, dearest, your thoughts are similar to ours when we consider the grinding of political power machine which is grating in a last desperate attempt to fortify itself in view of the incoming wave. (88) A new device which can change the optical frequency shift is described. It consists of a rotating grating, a synchro motor and a power supply whose frequency can be adjusted. (89) A method of measuring visual acuity with holographic grating is described. The measurement may be performed with a slightly modified conventional ophthalmoscope. (90) Two parallactic films of a nature color scene are obtained with a three color grating camera. (91) System form and demonstration method for a demonstrator of grating spectra a represented. (92) By using these equations, the frequency-tuning characteristics of TE(A) CO2 lasers, using such techniques as grating, F-P modulator, or injection locking, can be investigated theoretically. (93) Based on discrete diffraction light, an algorithm of holographic grating bandwidth compression is proposed. (94) A remote measurement system of solid surface displacement by laser Doppler effect of grating which was used to produce beat frequency is discussed. (95) Such distinctive optical properties as opticity and selective reflection of chiral agent-doped PDLC have widely been applying in the field of light filter, grating, and reflective display, etc. (96) A new linear displacement sensor with sealed ultra-long precision steel belt grating is studied. (97) In the paper a optical storage method based on the principle of grating diffraction is presented. (98) A transducer for lateral remote displacement measurement based on grating laser Doppler effect is introduced. (99) Grating Digital display Instrument is a kind of digital Instrument used in the precise measurement of linear displacement. (100) From structure of optical disk, its signal trace can be viewed as a reflection grating, so track pitch of optical disk and the length of the signal trace on a CD can be measured. (101) Smith-Purcell radiation characteristic is analyzed from a train of line charges moving parallel to a sinusoidal metal reflection grating using an integral equation model. (102) Two kinds of novel distributed fiber optic sensing technique, i. e. , Fiber Bragg Grating (FBG) and Brillouin Optical Time Domain Reflectometer (BOTDR), are introduced in this paper. (103) Femtosecond laser direct writing in transparent materials and the two-photon photopolymerization technology are used to fabricate the phase-gratings and Dammann grating. (104) In recent years, the fiber Bragg grating ( FBG ) sensor is a research hotspot concerning about optical fiber sensors. (105) A novel wavefront curvature sensor with a distorted diffraction grating (DGWFS) is described and computer simulations of its principle is made. (106) The external cavity is made up of fast axis collimator, collimating optical system and diffraction grating. (107) Changing the phase of digital grating can realize Moire fringe scanning. The global center of beam pattern can be calculated by multi_frame scanning images. (108) By means of trigonometric calculation, the intensity distribution of diffraction grating is obtained. (109) The addition and subtraction of characters can be performed in a coherent optical processing system if a grating is used as a filter. (110) From the cellar grating floated up the flabby gush of porter. (110) try its best to collect and create good sentences. (111) Phase error and its periodic wave behavior caused by system's nonlinear response and partial intensity saturation of fringe patterns in projected grating phase-shifting profilometry were studied. (112) We report Edge Filter Dynamic Demodulation Method Based on Filter Bragg Grating. (113) The vibration of cantilever is detected by a fiber Bragg grating ( FBG ) glued on the cantilever. (114) A new demodulation method of fiber Bragg grating(FBG) sensing signal, which is by making use of the monotonic decline section of an amplified spontaneous emission (ASE) light source, is proposed. (115) A new circuit used for the grating torque sensor of hydraulic turbine's principal axis system is designed. (116) This article introduces the structure of DWDM networks and some applications of fiber Bragg grating. (117) Based on coupled-mode theory, the fundamental principle that photorefractive volume grating is used as a wave filter for WDM is discussed. (118) A scattered field from a strip grating twist reflector is analysed through the microwave network theory. (119) According to the spectral feature of the signal generated by the multiplexed fiber Bragg grating (FBG) sensors, image spectrometry is proposed to demodulate multiplexed signal. (120) A method for subdividing the grating pulse signal by means of using computer clock pulse is presented in this paper. (121) The fiber Bragg grating sensor has been successfully adopted to monitor the stress tiebridge. (122) An arrayed waveguide grating (AWG) based triplexer has many advantages including small size and low cost. (123) The characteristics of diffraction grating of oblique incidence light wave are analysed theoretically and verified in experiments. (124) Plane diffraction grating, logarithmic amplifier and stable constant- current source are used in the system, thus the performance of the instrument is enhanced significantly and the cost is reduced. (125) A quality control system for spot welding is designed by using of grating displacement transducer. (126) Two package methods of Fiber Bragg Grating ( FBG ) temperature sensors were introduced. (127) The equation is related to both of the grating period and the sampled period, which have no relation to the duty ratio, the length of the gratings and the coupling coefficient . (128) This article introduces a new way which applies absolute zero position system of grating digital readout-instrument to measuring large diameter. (129) A new theoretical analysis of the contrast reversal images for the zeroth and other diffraction order encoded by a rectangular grating is given. (130) In order to improve the convergence rate, a correct Fourier expand method was introduced to differential theory of the finite conductivity diffraction grating. (131) With the equalizing filter made by long period grating(LPG), we design the flat gain spectra of EDFA. (132) The principle of pulse fine division in measurement of displacement by using grating scale (so called Grating line displacement transducer) with right-angled sinewave is discussed. (133) In chapter 4, According to the theory of scalar diffraction, firstly, the equipollence of spatial distribution of the plane-wave interferential field and parallel projective sine grating is discussed. (134) Each electrode of the Liquid Crystal phased array can be controlled separate and can come into being random phase by programming, which is totally different from traditional Liquid Crystal grating. (135) Root preparation: Peeling, slicing, and grating are critical to safely consumable cassava but also are labor intensive and non-mechanized. (136) After carefully studying the principle of fiber Bragg grating (FBG) sensor and magnetostriction effect, the models of strain viability and temperature sensor are established respectively. (137) Some integrated optics devices can be made based on the interdigital electrooptic bragg diffraction grating. (138) The paper shows the measuring results of blunt radius of diamond tool, precision glass grating and profile and topography of ultra-precision polished ceramics. (139) Grating, spatial light modulator, computer-generated hologram and film can be used as the filter. (140) A new method for fiber Bragg grating wavelength tuning is reported. (141) A micro - topography measurement system based on the laser grating micro - projection method was developed in this paper. (142) This paper suggests a new method of rapid and automatic measuring the spectral diffraction efficiency curve of plane grating. (143) The simultaneous phase shifting function is realized by an orthogonal grating, a diaphragm, an analyzer array,[http:///grating.html] and a 4-quadrant detector. (144) Parameter design rule and signal-producing mechanism of differential grating displacement sensor. (145) The light is emitted by the laser diode and enters a diffraction grating. (146) Most grating of all is the overuse of acappella sextet Take 6, whose soulless in-studio "perfection" easily qualifies them as one of the most annoying groups on the planet. (147) Based on a plane grating monochrometer and a optical scanner, the high time-resolved optical multichannel spectrometer is developed. A computer is used to real-time control and data acquisition. (148) This article introduces the near - field theory analysis and experiments of grating fabrication with phase masks. (149) This paper analyses the pattern function of DBF in subarray. The designing method for directivity pattern is given and the condition of producing the grating lobe is discussed. (150) So liquid crystal grating is used in extensive field such as diffraction optics, photoelectric switch, deflexion controlling of light beam. (151) METHODS: Retina MTF of two groups of people with emmetropia and ametropia were measured by means of a grating and parallel plate respectively. Then the measured MTF were compared and analyzed. (152) The degree of electronic angle measurement are mainly coded dial plate , grating angle measurement dial and dynamic disks in three forms. (153) The refractive index distribution function of long period fiber grating (LPG), which is ultraviolet written by amplitude mask, is a rectangular wave in the core region. (154) In this article, the phenol-sulfuric acid method combined with caramelization - grating photometer method is used to determine and monitor the content of sugar in algae solution. (155) The principle of measuring the light velocity with the method of wave modulation by ultrasonic diffraction crystal grating is analysed, and the experiment method is introduced. (156) Grating is placed in image space of objective lens, and used as the shearing part. Light wave from reference object and measured object interfered at the image space. (157) Contrast, spatial frequency, presentation time, moving velocity and phase reversal frequency of each grating are controlled independently. (158) On the basis of Fraunhofer diffraction theory, the diffraction patterns of a Varied Line-space(VLS) grating were obtained for incidence beam in parallel and uniform. (159) The method provides a new way to obtain a large diameter, high precision, high resolution mask of metrological radial grating. (160) In order to achieve flat multi-wavelength output, a long-period fiber grating with loss peak at 1530 nm is used to obtain flat gain spectrum. (161) A method of digital coding of grating by using color strips is presented. (162) The grating spectrograph and prism spectrograph were used and analyze the visible spectra of Cu - based alloys. (163) Discusses the design of cold light illuminator and the design of lens used in grating projection. (164) A broadband infrared grating scan spectral radiometer, whose measurement range is 1~20 μ m, has been developed. (165) Kinematic dynamic parameter tester and a kind of grating transducer developed recently are presented. (166) A digital audio Compact Disc (CD)is demonstrated as a reflection grating in teaching, and characteristics of CD is given. (167) When the laser beam goes through the diffraction grating, it is split up into a central bright beam plus a number of side beams. (168) Fiber grating sensing and monitoring technology has such advantages as strong anti interfere performance, good long term stability, absolute value measuring and distributing sensing, etc. (169) Offer yarn dyed spun silk and color grating spun silk with various specs. (170) Theoretical analysis shows that the number of working wavelength will increase with the increment of the harmonic number of the harmonic blazed grating. (171) It presents the characteristics of transmissive laser Moire signals and builds mathematic model of two grating diffraction. (172) The limitation of scalar method for diffractive grating is evaluated by comparison with rigorous coupled - wave analysis. (173) Grating, shelf, burglarproof doors and windows,[] snowproofing fence and parking apron. (174) Fiber Bragg grating (FBG) is an optical fiber passive device and develops quickly in the last decade. (175) The influence on reflective spectrum of fiber grating with nonuniform temperature variation field is discussed. (176) The second order diffraction light of Rayleigh scattering light, Raman light, diffused light and the fluorescence diffracted from the grating have been discussed. (177) First, high-precision optical grating and encoder disk is used as a detection device, which measures linear displacement and angular displacement of NC mechanism, and then collects error data. (178) It's unnecessary to collect deformed grating images of object reference plane, which reduces operation steps and takes no solution for the phase of object reference plane. (179) As the key device of a DWDM system, Etching Diffraction Grating (EDG) is one of the most potential types of planar waveguide DWDM devices. (180) A novel photorefractive nonlinear optics model was presented based on an optical beam erasing refractive index grating and two- beam coupling. (181) Along with the continuous perfection of fiber grating read-in and packaging techniques, some fiber grating sensors have been produced on a wide scale. (182) The results show that the spectrum characteristics of F-P interferometer with gain medium is better obviously than that of diffraction grating. (183) This paper presents a new non-contact displacement sensor with diffraction grating metrology system based on an improved Foucault focus detection method. (184) An arrayed waveguide grating (AWG) demultiplexer with total internal reflection (TIR) mirrors is designed based on silicon-on-insulator (SOI) material. (185) It is shown that the ratio of the correlation time of the laser source to the relaxation time of the induced grating plays an important role. (186) The absorption spectrum of iodine was recorded in the visible region using a HRD1 Double Grating Monochromator. (187) Finally adopted a diffraction grating monochromator spectral characteristics of optoelectronic devices as measuring equipment. (188) The recent years, the diffraction grating technology is valued people's day by day. (189) As a sensor element, fiber optic and grating transformed the information into reflecting wavelength shift. It also named wavelength demodulation which is immune for light power waving and system loss. (190) Hyperfine spectrum; Nonlinear optics; Degenerate four waves mixing; The equivalent grating; Isotope detecting. (191) The grating sensor comprises two pairs of gratings which are installed on a safety island, and the gratings are connected with a weighing control machine cabinet through signal cables. (192) Objective: It presents a new method that makes use of Grating Light Valve (GLV) in order to adjust minutely output wave-packet in grating external cavity semiconductor laser. (193) The angular displacement of reflecting surface is measured in accordance with the direction change of Moire fringes caused by the inclination of grating. self-imaging plane. (194) The particular functions and the impact to the systemic performance of the critical elements such as lighting system, grating, field lens and electronic ocular are analyzed. (195) Pattern differentiation can be performed in a coherent Optical processing system if a composite sinusoidal grating is used as a filter. (196) The old-fashioned, four-sided box grater, for example, is still the best tool for grating many vegetables and cheeses(), such as cheddar. (197) The apodized linear chirped fiber grating is an important passive device for dispersion compensation. (198) The device includes: an entrance slit (2), a concave grating (3), a optical fiber array (4) and a flat plate detector (5). (199) I drew a cheque and handed it to the cashier through the grating. (200) At last, we could embed grating in to QWIP,[/grating.html] the grating was much closer to the active region of QWIP. More quantity of exited wave absorbed to enhance responsivity . (201) Based on the principle of color measure, the mini-spectrometer uses concave grating as its light splitter, fiber as its color picker and liner CCD as its detector. (202) Incremental optical electric axial angle encoder usually adopts zero position grating providing absolute zero position in order to prevent from data fault during electricity failure suddenly. (203) According to the refractive index ellipsoid of uniaxial crystal, the relationship between diffraction efficiency of volume grating and polarization state of readout beam is theoretically analyzed. (204) An approximate equivalent coefficient for two-dimensional sub wavelength was obtained with the related expressions of grating structure. (205) Grating Pacific will gladly fabricate wire cloth with 'U' edging or other framing ready for installation into the supporting structure. (206) The ionic grating has a longer lifetime both in dark and under readout illumination, so nonvolatile storage comes true. (207) Experimental results indicate that this interrogation method is feasible and the strain applied on single grating is linear with the control voltage of tunable optical filter. (208) Some of these include the specialized forward time division multiplexing (FTDM) fiber, fiber Bragg grating, and holey fiber. (209) As one of the important technical specifications of diffraction grating, diffraction wave front aberration directly affects the grating resolution. (210) The utility model has characteristics in that the sensor includes a shape memory alloy elbow, the fiber grating, a copper plate with groove and a copper base plate. (211) In order to solve this problem, a new method is provided based on the Hybrid Genetic Algorithms, and using a emulation program design a common binary optics elements-Dammann Grating. (212) Image detection method for carbide tool wear based on laser grating projection is presented. (213) USES: linear density grating, through the refraction of light can quickly determined or knitting machine woven per cm or every inch of the yarn number within the root. (214) The coin fell through a grating at the side of the road. (215) Optical fibre grating utilize photosensitive characteristic to form the space phase grating in the core, it can change the transmission route of the light wave in the light-transmitting fibre. (216) The characteristics of visible spectra of Sn and Fe in Ti-based alloys were studied with grating spectroscope and prism spectroscope. (217) Firstly, the system of parallel grating pair, in which the grating grooves is unparallel while the grating surfaces is parallel, has been studied with the tri-dimensional ray-tracing method. (218) A new dynamic model is developed for simulating the widely tunable grating assisted codirectional coupler with rear sampled grating reflector (GCSR) lasers. (219) In this paper we describe the eigen-function expansion for the boundary value problems of electromagnetic theory of cylindrical grating. (220) And achieved application-specific integrated circuit chip of grating signal detection. (221) Laser-induced thermal index grating and its relaxation effect in polyatomic molecular materials have been studied theoretically. (222) Optical fiber grating is a kind of optical fiber passive device, it is developed quickly and widely used in recent years. (223) The simulations show that when the grating grooves are unparallel, the original chirp leads to the pulse width smaller only considering GDD. (224) Fiber Bragg Grating ( FBG ) is one of the most potential and typical optical passive components. (225) We propose a new subdivision technique directly subdividing the grating stripe by using complementary metal-oxide semiconductor (CMOS) microscopic imaging system combined with image processing. (226) Fiber grating is important passive component in modern fiber optical communication. (227) The miniaturization of volume, intelligent interface and diversification of the form of signal transportation will be the direction of the development of grating encoders. (228) The field type time grating displacement sensor, based on time space coordinate transformation, is one novel angular displacement sensor. (229) For unnecessary to collect deformed grating images of object reference plane, it reduces operation steps and takes no solution for the phase of object reference plane. (230) The fine grating photoelectric shaft encoder based on the Moire fringe signal has the advantages of high accuracy, high response frequency and easily realized miniaturization.http:// (231) Time resolved soft x-ray (SXR) spectra of copper laser plasmas are measured by involving a SXR streak camera with a SXR transmission grating. (232) This article introduces a method of measuring the radial of a concave lens with laser, grating and vemier caliper. (233) By using the fiber grating pressure sensing setup and Venturi tube, a novel flow velocity sensor based on double fiber Bragg gratings(FBGs) is proposed. (234) Amazingly enough, a beam of electrons had thus been diffracted in a manner completely analogous to a light wave bouncing off a reflection grating. (235) Emphasis is put on the experimental research on its tunable range and the bandwidth narrowing with a diffraction grating and a Fabry-Perot etalon. (236) Frequency-resolved measurement of the emission from a Eaman free electron laser under superradiation condition by a microwave grating spectrometer are presented. (237) In this parer, a realizable technique for tenuity light signal detection of fiber grating sensing system is presented. (238) In fiber grating sensing network, a great deal of data engendered need to be dealt with filtered and summarized timely to get accurater information of measurand. (239) This paper studied the lateral displacement-measurement technique by using the laser Doppler effect of the moving grating which acted as a scatterer. (240) Chondrules in the Jilin meteorite may be divided into two groups: normal rapid cooling(granular and porphyritic) chondrules and supercooling(grating and excentro-radial)chondrules. (241) By using a special Ronchi phase grating and polarization phase shifting method, four phase shifted patterns can be captured simultaneously, and thus the dynamic phenomena can be measured. (242) Four techniques used in drift measurement were compared. They were based on imaging normal sample, periodical regular pattern, zero-reference mask and atomic grating respectively. (243) A novel fiber grating accelerometer is present which uses FBG as basic sensing element based on cantilevered beam. |
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