Dichromated gelatine

Phase Materials. Phase holograms can be recorded in a large variety of materials, the most popular of which are dichromated gelatin, photopolymers, thermoplastic materials, and photorefractive crystals. Dichromated gelatin and some photopolymers require wet processing, and thermoplastic materials require heat processing. Photorefractive crystals are unique in that they are considered to be real-time materials and require no after-exposure processing. 

Dichromated gelatin coatings, 12 444 Dichromated resists, 15 156 Dichromate treatment, 9 397 Dickite, 6 659... 

Dichromated gelatin. This material is particularly sensitive to light in the blue and UV regions, but not the red. They are used to produce volume holograms that approach the theoretical limit in diffraction efficiencies. 

Dichromated gelatin is an attractive material because of its large index change and its usefulness in the visible, particularly with an argon laser (488, 514.5 nm). Its major disadvantages are some sensitivity to humidity, the requirement for wet processing, and the fact that it cannot be used in very thick films. 

It must be mentioned that the poIy(vinyI cinnamate) resist system makes excellent film and, unlike the dichromated gelatin resists, which they replaced, do not suffer from dark reaction, and thus can be stored indefinitely in the absence of light. 

It must be mentioned that the exposure requirements of dichromated gelatin are orders of magnitude less than those of bitumen of Judea resist material. In 1855, A.L. Poitevin demonstrated photolithography on stone sensitized with dichromated gelatin, glue, albumen, and gum. ... 

A system widely used in silkscreen printing takes advantage of the photosensitization reaction of the dichromate/poly(vinyl alcohol) or dichromate/gelatin system. The mechanism of these dichromate resists is obscure, but it is thought that the formation of the chromate ion from the dichromate ion is an important initial step ... 

Dichromated gelatin sensitized by methylene blue is sensitive to 400 to 700 nm. Therefore, three laser lights, red, green, and blue, can be exposed to dichromated gelatin sensitized by methylene blue. Full-color holography is thus performed by dichromated gelatin. 

Dichromate gelatin Blue sensitive 10 4000 Three-dimensional, two-dimensional, phase, refraction index 19... 

Fabrication Process of Dichromated Gelatin Sensitized by Methylene Blue 1 Preparation of dye-sensitized solution ... 

Gravure tissue n. Sheet of paper coated with dichromated gelatin but containing no pigment. Leach RH, Pierce RJ, Hickman EP, Mackenzie MJ, Smith HG (eds) (1993) Printing ink manual, 5th edn. Blueprint, New York. 

Major Applications Inks, dichromated gelatin,3 photographic sensitizer ... 

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