Unlock instant, AI-driven research and patent intelligence for your innovation.

Infrared photosensitive material

A photosensitive material and infrared technology, applied in photosensitive materials, optics, instruments, etc., can solve problems such as poor stability, unsatisfactory film aging performance, and reduced desensitization effect, achieving high stability effects

Inactive Publication Date: 2006-02-01
CHINA LUCKY FILM CORP
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This type of structural dye itself has poor stability and is easily oxidized during film production and storage, resulting in a further decrease in sensitivity. Solving the stability of sensitizing dyes during the production and storage process is an important subject of spectral sensitization technology One, this is especially true for infrared photosensitive materials; the addition of sensitizing dyes will cause desensitization, resulting in a decrease in the total sensitivity, and the more the sensitization range of the spectral sensitizing dye moves to the long wave, the more obvious the desensitization effect will be. Desensitization is also one of the important topics of spectral sensitization technology
[0005] U.S. Patent No. 4,011,083 discloses a technology to improve photosensitivity by reducing the desensitization of dyes, but this technology is not satisfactory; U.S. Patent No. Carbocyanine dyes can reduce desensitization; U.S. Patent No. 4,897,343 discloses that the combined use of ascorbic acid and sulfite can effectively reduce the desensitization of sensitizing dyes with a wavelength greater than 600nm, and the fog is suppressed. However, using this method, The aging performance of the film is unsatisfactory, which is not conducive to the preservation of photosensitive materials

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Infrared photosensitive material
  • Infrared photosensitive material
  • Infrared photosensitive material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A cubic silver bromoiodide emulsion with an iodine content of 1.5% was prepared by a conventional method, chemically sensitized by sulfur gold, and the average grain size of the emulsion was 0.65 μm.

[0061] Take 1 mole of the emulsion, perform spectral sensitization according to Table 1, the sensitization temperature is 40°C, and then coat it on a triacetate film base to obtain a film sample.

[0062] The film samples were exposed with 5400K light source and 5400K+KC14, and then developed with yn-2 at 20°C for 5 minutes, and the total sensitivity, red sensitivity and fog density were measured by standard methods. See Table 1 for the results.

[0063] Sensitizing dye

[0064] Sensitizing dye

Embodiment 2

[0066] A cubic silver bromoiodide emulsion with an iodine content of 2.5% was prepared by a conventional method, chemically sensitized by sulfur gold, and the average grain size of the emulsion was 0.65 μm.

[0067] Take 1 mole of the emulsion, perform spectral sensitization according to Table 2, the sensitization temperature is 40°C, and then coat it on a triacetate film base to obtain a film sample.

[0068] The film samples were exposed with 5400K light source and 5400K+KC14, and then developed with yn-2 at 20°C for 5 minutes, and the total sensitivity, red sensitivity and fog density were measured by standard methods. See Table 2 for the results.

[0069] Sensitizing dye

[0070] The data in Table 1 show that when the sensitizing conditions are the same, the new dye has better sensitization ratio and aging performance than the old dye; when the addition amount is 2.4×10 Adding sodium sulfite alone can improve the desensitization effect, but it will cause fog; ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
sizeaaaaaaaaaa
Login to View More

Abstract

The present invention is infrared photosensitive material. The infrared photosensitive material is sliver halide emulsion containing infrared sensitizing dye, stabilizer, sodium sulfite and ascorbic acid. It is stable owing to the combined action of infrared sensitizing dye, stabilizer, sodium sulfite and ascorbic acid.

Description

technical field [0001] The invention relates to an infrared photosensitive material. technical background [0002] The silver salt photosensitive material is exposed to form a latent image, and then developed to form a visible image. For photosensitive materials, spectral sensitization is extremely important. Silver halide itself is only sensitive to blue-violet light. Through the adsorption of spectral sensitizing dyes on silver halide emulsion particles, according to the different characteristics of the sensitizing dyes, photosensitive materials can be sensitive to green light. , red light, or infrared sensitive. Spectrum sensitizing dyes are usually cyanine dyes, which are adsorbed on silver halide, and after absorbing specific light, transfer energy to silver halide to form a latent image, which is then developed to form an image. Therefore, increasing the number of captured photons with the help of sensitizing dyes can effectively increase the sensitivity and broaden ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G03C1/28G03C1/09G03C1/34
Inventor 李晓明田岚戴淑萍赵登旺高鹿鸣
Owner CHINA LUCKY FILM CORP