1 Photochromic materials are widely used in optical information storage, optical switching devices and optical switches and other frontier areas.

2 The optical properties of a recoverable mercury salt photochromic paint were studied.

3 Fusion - welded multifocal photochromic ophthalmic lenses are composed of photochromic major lense and index segments lense.

4 Their recording principle are described and the photochromic media examples are given.

5 Photochromic liquid crystalline polymers have been the subject of intensive research in recent years due to their great potential application in reversible optical information storage.

6 The photochromic properties and the effect factor of the photochromism and photochromic mechanism of hybrid material had been studied.

7 The photochromic microcapsules with melamine resin as wall material and spirooxazine as core material were prepared by situ polymerization.

8 Organio photochromic material is a new record and display material, and has been used in laser display of holography.

9 Photochromic compound is characterized of changing from one colour to another under UV radiation and returned to be colourless after removal of the light source.

10 Benzothiazole derivatives with antibacterial, anti-cancer activity, fluorescence and photochromic activity, are widely applied in physical and optical research and development.

11 And the light control way of photochromic liquid crystal material was summarized.

12 The photochromism and the application of photochromic material in military field as optical information storage materials and camouflage material etc.

13 These compounds showed good photochromic reactions both in solution and in PMMA amorphous film by photo - irradiation.

14 The photochromic properties such as adsorption spectra, reversibility etc are examined by UV.

15 The crystal structure analysis of photocolored product showed that the photochromic phenomenon was due to photoisomerization from enol form to keto form.

16 Photochromic materials have wide applications in many fields such as photochromic glasses, optical storage materials, and light-operated switch, ect.

17 Therefore, the cleavage of the Hg-S bond and the proton transfer are the decisive steps for the photochromic reaction of this complex.

18 The spiropyrans with a nitro group at the benzopyran moiety showed reverse photochromic behavior, others were normal photochromic compounds.

19 The a group at the benzopyran moiety showed reverse photochromic behavior, others were normal photochromic compounds.