Saving method for holographic negative film over exposure

A rescue method and overexposure technology, applied in the field of holography, which can solve the problems of inability to record immediately, loss, and difficulty in controlling exposure.

Inactive Publication Date: 2005-03-02
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Dry plates are still commonly used now, but when using dry plates to record holograms, it is often difficult to control the exposure
Especially in scientific research, if an important phenomenon cannot be recorded immediately, it is possible to lose a good opportunity for a major discovery

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0016] The present invention is described below in conjunction with embodiment.

[0017] The rescue method of the overexposure of the holographic film of the present invention, its specific processing process comprises the following four steps:

[0018] 1) In a darkroom, the emulsion side of the overexposed negative containing the hologram is overlaid with the non-emulsion side of an unexposed negative and pressed between two clean glass plates;

[0019] 2) With the above-mentioned overlapping negatives, according to the situation of the overexposed negatives, the exposure time is selected from 2 seconds to 3 seconds, and 5 exposures are performed to form 5 regenerated holographic negatives;

[0020] 3) drying the above-mentioned regenerated hologram film after developing and fixing;

[0021] 4) Select a film with a suitable exposure from the reconstructed hologram, perform optical or digital reconstruction, and obtain a clear reconstructed image of the hologram.

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Abstract

It is a method of rescue overexposure of hologram negative, it includes four steps: in the dark room, overlap a emulsion face of overexposure negative contains holograph and a non-emulsion face of unaffected negative, and then put it in between two glass plates; time the overlapped negative an exposure differently, it always lasts 1 second to 5 second, exposure 5 negatives forms 1 regenerative hologram negative; develop the regenerative hologram negative and go on with photographic fixing, then dry out it; choose a negative of proper quantity of illumination from regenerative hologram, carry on optical reconstruction or digital reconstruction, at last will obtain clear hologram restructuring graph.

Description

technical field [0001] The invention relates to holography, in particular to a salvage method for overexposure of a holographic film. Background technique [0002] Since the appearance of laser, it has provided an ideal coherent light source for holography, and holography has developed rapidly. Now holography has entered people's daily life. In supermarkets, all kinds of goods are pasted with colorful anti-counterfeiting signs made by holography. Everything is to help people improve their quality of life. [0003] The development of holography itself is proceeding along two different directions. First, in order to improve the imaging resolution of holography, short wavelengths, ultraviolet rays, soft X-rays, hard X-rays, electron beams, atomic beams and neutrons are used. The resolution has reached or less than the atomic level. 2. In order to study transient phenomena, develop in the direction of ultrafast, from microseconds, nanoseconds, picoseconds to femtoseconds, espe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03H1/00G03H1/04G03H1/22
Inventor 陈建文高鸿奕徐至展
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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