JP2007187686A - System for taking holographic image by using silver halide holographic sensitive material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive three-dimensional image with high customer satisfaction in place of a conventional two-dimensional image. <P>SOLUTION: In a system for taking holographic images for portraits, a transmission hologram is recorded at two different wavelengths in a sheet of silver halide photosensitive material by synchronizing only two different pulsed lasers, one of the two different pulsed lasers having an emission wavelength of 500 nm to less than 600 nm and the other of the two different pulsed lasers having an emission wavelength of 600 nm to less than 700 nm. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a holographic imaging system using a silver halide photosensitive material. In particular, the present invention relates to a holographic photographing system that provides a customer with a satisfactory three-dimensional stereoscopic image, instead of a conventional photo studio that provides a customer with a two-dimensional human image.

Two-dimensional human images such as photographs are generally accepted and fixed. Ordinary photographs can be easily taken using a camera, and development and print services can be received at low cost. The memorial photos can be taken at photo studios, etc., and you can get extremely high-quality images, and it can be said that it has reached a level that satisfies customers.
On the other hand, it is difficult to say that three-dimensional three-dimensional human images are widely accepted at the present time. In order to disseminate stereoscopic images, it is necessary to be able to provide inexpensive three-dimensional human images according to customer requirements rather than uniform copies of the same images. For example, if a customer's portlet can be provided quickly, inexpensively and with high quality, it is predicted that a three-dimensional stereoscopic image will be widely accepted and fixed more than a two-dimensional image.
A high-quality three-dimensional image in person photography or the like is obtained by a holographic stereogram or a hologram. However, since the holographic stereogram requires multipoint interference exposure, it takes too much time to obtain one image. For this reason, it is difficult to obtain a high-quality image at low cost.
On the other hand, a person-photographed hologram is performed using a pulse laser (for example, see Non-Patent Document 1).
The human-photographed hologram using these pulse lasers can be reproduced with white light by using a reflection type, and a three-dimensional human image can be viewed. However, a big problem with generalization is that, in addition to the above-mentioned price, the image is basically a monochrome monochrome image. Although the actual color change can be changed in various ways by processing, the person often looks eerie because of the single color. If a pulse laser corresponding to three colors of blue light, green light, and red light is used, a full color hologram can be obtained in principle, but an imaging system including the apparatus becomes large-scale.
Furthermore, since the human-photographed hologram using these pulse lasers is copied from the transmission type to the reflection type without changing the image magnification, the above-mentioned creepiness is promoted. In addition to being expensive, these problems are a major obstacle to the generalization of three-dimensional person images that appear three-dimensional.
LEONARDO, 1992, 5th, No. 5,443-448

  An object of the present invention is to provide an inexpensive three-dimensional image with high customer satisfaction, which is replaced with a conventional two-dimensional image. In particular, it is to provide a three-dimensional portrait image that a customer can enjoy.

The present invention finds that even a three-dimensional image taken with only two colors of green light and red light appears to be a natural full-color three-dimensional image to the human eye, and is sensitive to two colors of green light and red light. It is based on the finding that a highly sensitive silver salt light-sensitive material that can be prepared can be prepared. Further, it is based on the finding that by performing appropriate reduction, an image can be obtained in which the eerieness disappears and a powerful stereoscopic effect can be felt. Furthermore, it has been found that a high-quality and low-cost holographic imaging system can be constructed by creating a transmission hologram and a reflection hologram using the same by using the same optical system. Based on. Based on these findings, we have devised a holographic imaging system for human photography that can provide a three-dimensional portrait image that can satisfy customers with a sense of security and three-dimensionality without weirdness.
The object of the present invention is achieved by the following method.

(1) Only two types of pulsed laser light, a pulse laser having an emission wavelength in the range of 500 nm to less than 600 nm and a pulse laser having an emission wavelength in the range of 600 nm to less than 700 nm, are used in synchronization. 1. A holographic photographing system for photographing a person, wherein a transmission type hologram having two kinds of wavelengths is recorded on one silver halide photosensitive material.
(2) The pulse laser having the incident angle of the reference light of the pulse laser having the emission wavelength in the range of 500 nm or more and less than 600 nm in the range of 50 ° to 80 ° and the emission wavelength in the range of 600 nm to less than 700 nm. The holographic photographing system for photographing a person according to (1), wherein an incident angle of the reference light of the laser is in a range of 20 ° to 45 °.
(3) The object light of the pulse laser having an emission wavelength in the range of 500 nm to less than 600 nm and the pulse laser having an emission wavelength in the range of 600 nm to less than 700 nm is basically coaxial. A holography photographing system for photographing a person according to (1) or (2).
(4) From the transmission hologram described in (1), only two types of pulse lasers having a light emission wavelength in a range of 500 nm to less than 600 nm and a pulse laser having a light emission wavelength in a range of 600 nm to less than 700 nm. A holographic imaging system for human photography, wherein a reflection hologram having two types of wavelengths is recorded on a single silver halide photosensitive material using a pulsed laser beam.
(5) Reproduction illumination light from a pulse laser having an emission wavelength in the range of 500 nm to less than 600 nm and a pulse laser having an emission wavelength in the range of 600 nm to less than 700 nm of the transmission hologram is used to produce the transmission hologram. The holography photographing system for photographing a person according to (4), wherein the holographic photographing system is the same optical system as the reference light at the time.
(6) The holography for photographing a person according to (4) or (5), wherein the reproduction wavelength of the reflection hologram is shifted to a short wavelength in the range of 10 nm to 50 nm with respect to the recording wavelength. -Shooting system.
(7) The holographic imaging system for photographing a person according to any one of (4) to (6), wherein the reflection hologram is recorded from the transmission hologram through a reduction optical system.
(8) The holography photographing system for photographing a person according to (7), wherein the lateral magnification of the reduction is in a range of 0.8 to 0.4.
(9) The person described in (4), wherein transmission hologram recording is performed at many locations with respect to the customer, and reflection hologram recording from the transmission hologram is concentrated at fewer locations. Holography-shooting system for shooting.

  According to the present invention, an inexpensive three-dimensional image with high customer satisfaction can be obtained instead of a conventional two-dimensional image. In particular, a three-dimensional portrait image can be enjoyed.

The holographic imaging system using the silver halide photosensitive material of the present invention will be described below.
The present invention uses only two types of pulse laser light, a pulse laser having an emission wavelength in the range of 500 nm to less than 600 nm and a pulse laser having an emission wavelength in the range of 600 nm to less than 700 nm.

A pulse laser having an emission wavelength in the range of 500 nm to less than 600 nm is preferably one having a coherent length of 10 cm or more, more preferably 50 cm or more. The light emission time is preferably 10 ⁻⁶ seconds or less, more preferably 10 ⁻⁷ seconds or less. If it is within these light emission time, you may make it light-emit continuously during these time, or may repeat light emission / extinction. The output is preferably 10 mJ or more and 2000 mJ or less. The beam diameter, beam spread angle, degree of polarization, etc. are arbitrary. Under these conditions, interference fringes for human photography can be safely and preferably recorded. Specifically, the second harmonic of the pulse YAG laser, 532 nm, is preferably used. More specifically, the second harmonic of the lamp excitation high output pulse Nd: YAG laser, 532 nm, is preferably used. The pulse width is preferably in the range of 1 nsec to 100 nsec, and the coherence distance can be increased to 2 m or more by an injection seeder. The light output distribution is preferably a Gaussian mode.

A pulse laser having an emission wavelength in the range of 600 nm to less than 700 nm is preferably one having a coherent length of 50 cm or more, more preferably 1 m or more. The light emission time is preferably 10 ⁻⁶ seconds or less, more preferably 10 ⁻⁷ seconds or less. If it is within these light emission time, you may make it light-emit continuously during these time, or may repeat light emission / extinction. The output is preferably 10 mJ or more and 2000 mJ or less. The beam diameter, beam spread angle, degree of polarization, etc. can be determined by the optical system. Under these conditions, interference fringes for human photography can be safely and preferably recorded. Specifically, a pulse Ruby laser, 694 nm is preferably used. The pulse width is preferably in the range of 1 nsec to 100 nsec, and the light output distribution is preferably a Gaussian mode.

A transmission hologram is imaged using only these two types of pulse lasers in synchronization. Even a three-dimensional image taken with only two colors of green light and red light appears to be almost a full color three-dimensional image due to adaptation to the human eye. In the exposure of three colors including blue, the photographing system becomes complicated and expensive, which is not realistic. In human photography, skin color reproduction is the most important, and red, orange, yellow, and green can be sufficiently reproduced with this color as the center. The reproduction of blue, purple and light blue is preferably ignored in consideration of skin color reproduction. Using two types of lasers in synchronism means that the light emission of the two types of lasers occurs within a time period of preferably 10 ⁻⁶ seconds or less, more preferably 10 ⁻⁷ seconds or less. To do. At 10 ^-3 seconds or more, the person moves and the green and red images start to show off. It is possible to take a fine image by shooting in synchronization.

In the present invention, transmission type holography of two kinds of wavelengths is recorded on one silver halide photosensitive material. On the other hand, it is conventionally performed to use a photosensitive material corresponding to each wavelength. However, this method is complicated in pasting and it is difficult to provide an inexpensive three-dimensional image that is the object of the present invention. In order to achieve the object, it is necessary to use a high-sensitivity silver salt photosensitive material that can be sensitive to two colors of green light and red light. Here, the high-sensitivity silver salt photosensitive material means a material capable of recording with a light amount of preferably 500 μJ / cm ² or less, more preferably 100 μJ / cm ² or less.
The imaging system of the present invention cannot be completed without a material sensitive to two colors with high sensitivity. If the sensitivity is low, it is necessary to increase the output of the pulse laser, which is unrealistic from the viewpoint of creating an actual laser and from the viewpoint of safety to a person. The present inventor has found that a highly sensitive silver salt photosensitive material capable of being sensitive to two colors of green light and red light can be prepared.
The present invention is a holographic photographing system for photographing a person. Here, the person may include animals, plants, and the like, and photography with animals and plants alone is also possible. Furthermore, it is possible to photograph a normal object.

The present invention will be described below with reference to the drawings.
FIG. 1 is an example of a side view showing a holographic imaging system for recording a transmission hologram of the present invention, and FIG. 2 is a top view thereof.

  The 532 nm light from the Nd: YAG pulse laser and the 694 nm light from the Ruby pulse laser are separated into object light and reference light, respectively. The reference light is spread by a concave lens and converted into parallel light by an off-axis parabolic mirror. The incident angle of the reference light of 532 nm on the silver halide photosensitive material is preferably in the range of 50 ° to 80 °. Here, the incident angle is defined as an incident angle of a light beam measured from an axis perpendicular to the surface of the silver halide photosensitive material. On the other hand, the incident angle of the 694 nm reference light to the silver halide photosensitive material is preferably in the range of 20 ° to 45 °. More preferably, the incident angle of the reference light of 532 nm is around 70 °, and the incident angle of the reference light of 694 nm is around 35 °. By maintaining the angle of the reference beam, a crosstalk image at the time of reproduction of the transmission hologram can be separated, which is convenient when creating a reflection hologram described later. By maintaining this angle, a simple and inexpensive holographic imaging system can be made. The reference light is preferably P-polarized light because it can prevent unnecessary reflection.

  It is preferable that the object light basically has two pulse laser beams coaxial. By making it optically coaxial, unnecessary shadow coloring can be prevented. Optically coaxial 532 nm and 694 nm object beams are spread by a concave lens and are incident on a diffusion plate. The light from the diffuser hits the person and becomes the object light of the person on the silver halide photosensitive material. In the example of FIG. 2, an example in which object light hits a person from two directions through a diffusion plate is shown. However, object light in three or more directions is possible. It is possible to devise appropriately as in the case of lighting.

  The concave lens, which is an optical material to be used, is preferably provided with an antireflection film, and the focal length and the like can be determined by an imaging system. The size of the off-axis parabolic mirror, the focal length, and the degree of off-axis can also be determined by the size of the photosensitive material and the imaging system. The size and material of the diffuser can also be determined by the imaging system. In any case, it is important for safety to prevent the person from being exposed to the laser beam directly. The silver halide light-sensitive material is preferably a film-like silver halide light-sensitive material having cellulose triacetate (TAC) or PET as a support. When a glass dry plate is used as a photosensitive material, it is expensive and inconvenient to handle. It is most preferable to perform laser exposure by fixing a film having a size of 4 or more in size between glass with an antireflection film. The larger the size of the silver halide photosensitive material, the more preferable because the viewing angle of a reflection hologram described later is increased. The back side of the sandwiched glass is preferably subjected to black treatment to prevent light reflection. In order to increase the interference efficiency, it is preferable that the optical path lengths of the reference light and the object light are strictly matched. The ratio between the reference light intensity and the object light intensity is determined to be a value that enables stable recording of interference fringes on the photosensitive material, and is basically fixed and used. The photographing optical system is basically fixed, and a person can be easily photographed with two colors of synchronized laser pulse light. Since it is possible to shoot dozens of times a day, the cost is reduced and generalization of a three-dimensional image becomes possible. The person faces the light-sensitive material under white light, and the shutter of the light-sensitive material opens at the moment when the shooting space changes to a safety light with respect to the silver halide light-sensitive material, and pulse lights of 532 nm and 694 nm are emitted in synchronization with that moment. In addition, the photographing system in which the shutter of the photosensitive material is closed and the safety light is switched to the white light can be easily assembled, and the above-described three-dimensional person photographing can be performed as easily as a normal current photo studio. .

  The present invention is preferably based on the transmission hologram described above, and only two types of pulse lasers, a pulse laser having an emission wavelength in the range of 500 nm to less than 600 nm and a pulse laser having an emission wavelength in the range of 600 nm to less than 700 nm. A holographic imaging system for photographing people, characterized in that a reflection hologram having two types of wavelengths is recorded on a single silver halide photosensitive material using the light. In normal two-dimensional photography, negative photography corresponds to photography of a transmission hologram, and printing from a negative to a print corresponds to creation of a reflection hologram. A transmission hologram is also called a master, and a reflection hologram is also called a transfer. This reflection hologram makes it possible to enjoy a three-dimensional image under a normal illumination lamp.

A pulse laser having an emission wavelength in the range of 500 nm to less than 600 nm is preferably one having a coherent length of 10 cm or more, more preferably 50 cm or more. The light emission time is preferably 10 ⁻⁶ seconds or less, more preferably 10 ⁻⁷ seconds or less. If it is within these light emission time, you may make it light-emit continuously during these time, or may repeat light emission / extinction. The output is preferably 10 mJ or more and 2000 mJ or less. The beam diameter, beam spread angle, degree of polarization, etc. are arbitrary. Specifically, the second harmonic of the pulse YAG laser, 532 nm, is preferably used. More specifically, the second harmonic of the lamp excitation high output pulse Nd: YAG laser, 532 nm, is preferably used. The pulse width is preferably in the range of 1 nsec to 100 nsec, and the coherence distance can be increased to 2 m or more by an injection seeder. The light output distribution is preferably a Gaussian mode.

A pulse laser having an emission wavelength in the range of 600 nm to less than 700 nm is preferably one having a coherent length of 50 cm or more, more preferably 1 m or more. The light emission time is preferably 10 ⁻⁶ seconds or less, more preferably 10 ⁻⁷ seconds or less. If it is within these light emission time, you may make it light-emit continuously during these time, or may repeat light emission / extinction. The output is preferably 10 mJ or more and 2000 mJ or less. The beam diameter, beam spread angle, degree of polarization, etc. can be determined by the optical system. Specifically, a pulse Ruby laser, 694 nm is preferably used. The pulse width is preferably in the range of 1 nsec to 100 nsec, and the light output distribution is preferably a Gaussian mode.
These two types of pulse lasers are preferably used in synchronism with each other. However, since the reflection type hologram is created from the reproduced image of the transmission type hologram, it is not necessarily synchronized unless the optical system is displaced due to vibration or the like. There is no need. Further, it is not necessary to perform exposure with only one pulsed light, and it is possible to adjust the exposure amount for the silver halide photosensitive material by continuously emitting pulsed light.

FIG. 3 is an example of a side view showing real image reproduction from the transmission hologram of the present invention, and FIG. 4 is a top view thereof.
The 532 nm light from the Nd: YAG pulse laser and the 694 nm light from the Ruby pulse laser are separated into reproduction illumination light and reference light, respectively. The reproduction illumination light is preferably the same optical system as the reference light used when creating the transmission hologram shown in FIGS. After the processing, the photographed transmission hologram is set upside down and upside down. Since the optical system of the reproduction illumination light at the time of real image reproduction is exactly the same as the optical system of the reference light at the time of photographing, a color real image in which the reproduction real image of 532 nm and the reproduction real image of 694 nm are completely overlapped can be reproduced. By defining the incident angle of the reference light at the time of photographing the transmission hologram as described above, a complete two-color image in which the crosstalk image is spatially separated can be obtained. By simultaneously recording two colors on a single silver halide photosensitive material, alignment of the photosensitive material is not required at all, and a color real image can be reproduced easily and easily.

  In the present invention, a silver halide light-sensitive material is placed at the position of the reproduced real image, and a reference color beam is applied from the opposite side for exposure to obtain a reflection color hologram having the same magnification. In the present invention, it is preferable to shift the reproduction wavelength of the reflection hologram to a short wavelength in the range of 10 nm to 50 nm with respect to the recording wavelength. As shown in FIGS. 3 and 4, the real image reproduced from the transmission hologram has wavelengths of 532 nm and 694 nm. When a reflection hologram is created by adding reference light to this reproduction real image, the wavelengths of 532 nm and 694 nm are basically reproduced from the reflection hologram if there is no change in the interference fringe spacing due to the processing. In the present invention, the reproduction wavelength is preferably changed from 482 nm to 522 nm and from 644 nm to 684 nm. This shortening of the reproduction wavelength is preferably achieved by reducing the film thickness of the photosensitive material after processing relative to the time of recording. A slight removal of silver halide and / or gelatin by treatment is preferably used as a method for shortening the wavelength. In order to increase the diffraction efficiency and shorten the reproduction wavelength with high reproducibility, it is necessary to devise a silver halide photosensitive material and a processing method described later. Although it is possible to adopt a method of increasing the film thickness with triethanolamine at the time of exposure and extracting it after processing to shorten the wavelength, in order to provide a simple and inexpensive photographing system for the purpose of the present invention, it is necessary to perform processing in advance. It is preferable to incorporate a method capable of thinning into a silver halide photosensitive material.

  The degree of shortening is very important for the present invention. When reproduced without shortening the wave, even if the diffraction efficiency is high, it looks dark to the human eye during viewing. If the wave length is too short, redness is lost from the most important skin color. In the present invention, even when reproducing two colors of red light and green light, the fact that the human eye looks full color is utilized. Therefore, the reproduction colors of the two colors basically reproduce the memory color of the skin color from the hologram. It is important, and it is never important to reproduce the true colors including hue, saturation and lightness. The intensity of the red and green reproduction light is affected by the diffraction efficiency of the reflection hologram and the ratio of the red and green light of the reproduction illumination light. Basically, exposure is performed so that the diffraction efficiency of either light increases. It is preferable to set various processing conditions.

  In the present invention, it is preferable to record a reflection hologram from a transmission hologram through a reduction optical system. Conventional holograms are usually monochromatic and have the same magnification. In the case of a person, this equal-size hologram is often too real and eerie. The present inventor has found that by setting the horizontal magnification of reduction from 0.8 to 0.4, the eerieness disappears and a three-dimensional image in which a powerful stereoscopic effect is felt can be obtained. Normally, the vertical magnification is the square of the horizontal magnification, but the reduction of the horizontal magnification according to the present invention is not a big problem. If the horizontal magnification is further reduced, the vertical magnification becomes too small, and the stereoscopic effect disappears, resulting in an unnatural hologram. By recording two types of wavelengths on the above-mentioned single silver halide photosensitive material and reproducing the real image using the same optical system as the reference light used when creating the transmission hologram, the two-color image is completely obtained. Thus, it is possible to obtain a full color hologram with a clear horizontal magnification reduced.

FIG. 5 is an example of a side view in which a reflection hologram is recorded through a reduction optical system on a real image reproduced from a transmission hologram of the present invention, and FIG. 6 is a top view thereof.
The 532 nm light from the Nd: YAG pulse laser and the 694 nm light from the Ruby pulse laser are separated into reproduction illumination light and reference light, respectively. A real image is reproduced by the reproduction illumination light. This real image is reduced by a convex lens to form an image on the photosensitive material. Reference light is exposed from the opposite side of the photosensitive material. As a result, an image-type hologram is recorded, and a three-dimensional image can be reproduced with white light. As the reference light, 532 nm light and 694 nm light are coaxial, spread by a concave lens, and then converted into parallel light by an off-axis parabolic mirror and used as reference light. In order to increase the viewing angle of the created reflection hologram, it is preferable that the size of the transmission hologram for reproducing the real image is large. For the same reason, it is preferable that the convex lens used for reducing the reproduced real image has a large aperture and a short focal length. The size of the completed reflection type hologram is preferably an eight-piece size for easy appreciation. A convex lens having a large aperture and a short focal length is usually expensive, which may hinder the spread of the photographing system. From this point of view, it is possible to use an off-axis parabolic mirror instead of a convex lens to reduce the real image.

FIG. 7 shows an example of a side view for recording a reflection hologram when a parabolic mirror is used, and FIG. 8 shows a top view thereof.
The off-axis paraboloid mirror is preferably used in the holographic imaging system of the present invention because a large-diameter lens can be obtained at a lower cost than a convex lens.
The attached drawings are about 1/10 scale, but the dimensions and the like are not strict but are simply displayed.

  The basis of the present invention is a two-stage imaging system that uses the same optical system to shoot a transmission hologram and to create a reflection transfer using it as a master. There is also a method of creating a reflection hologram by one-step shooting, but via the master, adjustment of exposure amount, adjustment of the light quantity ratio of reference light and object light, setting of short wavelength shift of reflection hologram, shooting It is preferable in terms of simplicity as a system.

Reflective holograms recorded by the holographic imaging system of the present invention can be enjoyed by customers by freely illuminating the reflective hologram with illumination by a normal halogen lamp, LED, etc. Become.
In the present invention, a holographic imaging system that preferably performs recording of transmission holograms at many locations for a customer and concentrates recording of reflection holograms from the transmission holograms at a small number of locations. A customer who wants to shoot a three-dimensional portrait records a transmission holographic. This recording place is scattered in the area like a conventional photo studio, and it is possible to take pictures at a convenient place and time. The photographed transmission holograms are collected in one place or several places. The collected transmission holograms are processed in a concentrated manner, and a reflection hologram is photographed from the transmission hologram. This system configuration corresponds to a conventional color negative film photographing and centralized printing system in a laboratory. The holographic imaging system that performs recording of the transmission hologram at many locations for the customer and concentrates the recording of the reflection hologram from the transmission hologram at a small number of locations enables low-cost and stable quality 3D Images can be provided to customers. When recording a transmission hologram and recording a reflection hologram from the transmission hologram at a store such as a photo studio, the amount of money including the pulse laser increases, and the quality Retention is also difficult. Stores such as photo studios only record transmissive holograms, thereby reducing financial investment and maintaining quality. Collecting transmission holograms taken in stores like these photo studios in a lab-like location, performing batch processing, and recording reflection holograms from them will reduce the amount of money invested as well. In addition, the quality can be easily maintained. The reflection hologram may be delivered directly to the customer from the lab, or may be returned to a store such as a photo studio and delivered to the customer from there.
By providing the above-described system with the above-described three-dimensional portrait with a reduced sense of full color, the three-dimensional image is versatile and generally accepted.

The holographic silver halide photosensitive material of the present invention will be described below.
In the present invention, the silver halide photosensitive material for holography is a silver halide photosensitive material capable of recording an interference wave of object light and reference light. By this wavefront recording, both the amplitude and phase of the object light can be recorded, and the object can be reproduced and reproduced three-dimensionally faithfully by the reference light.
The holographic silver halide light-sensitive material of the present invention has at least one silver halide emulsion layer on a support. The silver halide grains in the silver halide emulsion layer are preferably spectrally sensitized with three or more types of spectral sensitizing dyes. Particularly preferably, these three types of spectral sensitizing dyes have two spectral absorption maximums between at least 500 nm and 550 nm and between 600 nm and less than 700 nm. More preferably, it has two maximum values of spectral absorption between at least 510 nm and 540 nm and between 620 nm and 680 nm. The maximum value of spectral absorption is obtained by measuring the transmission spectral absorption of the photosensitive material with reference to air with a normal spectrophotometer. There may be three or more maximum values of spectral absorption, and there may be a maximum value of spectral absorption outside the above wavelength region.

The maximum value of spectral absorption between 500 nm and 550 nm is preferably in the range of 0.1 to 0.5 in terms of transmission absorbance. More preferably, it is in the range of 0.2 to 0.4. These transmission absorbances are determined by measuring the transmission spectral absorption of the light-sensitive material with reference to air with a normal spectrophotometer. The maximum value of spectral absorption between 600 nm and less than 700 nm is preferably in the range of 0.1 to 0.5 in terms of transmission absorbance. More preferably, it is in the range of 0.2 to 0.4. These transmission absorbances are similarly determined by measuring the transmission spectral absorption of the light-sensitive material with reference to air with a normal spectrophotometer. It is important to set the transmission absorbance at the maximum value of spectral absorption within these ranges. If the transmitted absorbance is too low, the sensitivity is lowered, and if the transmitted absorbance is too high, it is difficult to record uniform interference fringes in the film thickness direction of the photosensitive material.
Particularly preferably, the spectral absorption maximum between 500 nm and 550 nm is prepared by one or more types of spectral sensitizing dyes, and the spectral absorption maximum between 600 nm and less than 700 nm is prepared by two or more types of spectral sensitizing dyes. It is that.

In the present invention, the sensitizing dye is preferably contained in a total amount of 1 × 10 ⁻⁴ mol or more and 1 × 10 ⁻² mol or less per mol of silver in the silver halide grains. By containing the addition amount of the sensitizing dye, the destabilizing effect on the silver halide ultrafine particles due to the use of a silver halide solvent can be remarkably suppressed while being highly sensitive.

In general, the dyes used in the present invention include cyanine dyes, merocyanine dyes, complex cyanine dyes, complex merocyanine dyes, holopolar cyanine dyes, hemicyanine dyes, styryl dyes and hemioxonol dyes.
For these dyes, any of nuclei commonly used for cyanine dyes as basic heterocyclic nuclei can be applied. That is, for example, pyrroline nucleus, oxazoline nucleus, thiozoline nucleus, pyrrole nucleus, oxazole nucleus, thiazole nucleus, selenazole nucleus, imidazole nucleus, tetrazole nucleus, pyridine nucleus; a nucleus in which an alicyclic hydrocarbon ring is fused to these nuclei; and Nuclei in which aromatic hydrocarbon rings are fused to these nuclei, for example, indolenine nucleus, benzoindolenine nucleus, indole nucleus, benzoxazole nucleus, naphthoxazole nucleus, benzothiazole nucleus, naphthothiazole nucleus, benzoselenazole nucleus Benzimidazole nucleus and quinoline nucleus can be applied. These nuclei may have a substituent on the carbon atom.

  Usually, an acidic nucleus such as a merocyanine dye is a heterocycle (preferably a 5- or 6-membered nitrogen-containing heterocycle) composed of carbon, nitrogen, and / or chalcogen (typically oxygen, sulfur, selenium, and tellurium) atoms. More preferably, when forming a 5- or 6-membered nitrogen-containing heterocycle consisting of carbon, nitrogen, and / or chalcogen (typically oxygen, sulfur, selenium, and tellurium) atoms. . Specifically, for example, the following nuclei can be mentioned.

2-pyrazolin-5-one, pyrazolidine-3,5-dione, imidazoline-5-one, hydantoin, 2 or 4-thiohydantoin, 2-iminooxazolidine-4-one, 2-oxazoline-5-one, 2-thiooxazolidine-2,5-dione, 2-thio Oxazoline-2, 4-dione, isoxazoline-5-one, 2-thiazoline-4-one, thiazolidine-4-one, thiazolidine-2, 4-dione, rhodanine, thiazolidine-2, 4-dithione, isorhodanine, indan-1, 3-dione, thiophene-3-one, thiophene-3 -On-1, 1-dioxide, indoline-2-one, indoline-3-one, 2-oxoindazolinium, 3-oxoindazolinium, 5,7-dioxo-6, 7-dihydrothiazolo [ 3,2-a] pyrimidine, cyclohexane-1,3-dione, 3,4-dihydroisoquinoline-4-one, 1,3-dioxane-4,6-dione, barbituric acid, 2-thiobarbituric acid, chroman-2, 4-dione , Indazolin-2-one, pyrido [1,2-a] pyrimidine-1,3-dione, pyrazolo [1,5-b] quinazolone, pyrazolo [1,5-a] benzimidazole, pyrazolopyridone, 1,2,3,4 Tetrahydroquinoline-2, 4-dione, 3-oxo-2, 3-dihydrobenzo [d] thiophene-1, 1-dioxide, 3-dicyanomethine-2, 3-dihydrobenzo [d] thiophene-1, 1-dioxide nucleus.
These acidic nuclei may be condensed with a ring or may be substituted with a commonly used substituent.
Preferably, the acid nucleus is hydantoin, 2 or 4-thiohydantoin, 2-oxazoline-5-one, 2-thiooxazoline-2, 4-dione, thiazolidine-2, 4-dione, rhodanine, thiazolidine-2, 4-dithione, barbituric acid, 2- Thiobarbituric acid, more preferably hydantoin, 2 or 4-thiohydantoin, 2-oxazoline-5-one, rhodanine, barbituric acid, 2-thiobarbituric acid, more preferably 2-thiohydantoin, or Rhodanine.

  These sensitizing dyes are often used in combination with other dyes for the purpose of supersensitization. Representative examples of supersensitization combinations are U.S. Pat. Nos. 2,688,545, 2,977,229, 3,397,060, 3,522,052, and third. No. 3,527,641, No. 3,617,293, No. 3,628,964, No. 3,666,480, No. 3,672,898, No. 3,679,428. 3,703,377, 3,769,301, 3,814,609, 3,837,862, 4,026,707, British Patent No. 1, No. 3,344,281, No. 1,507,803, JP-B Nos. 43-4936, 53-12375, JP-A Nos. 52-110618, and 52-109925.

  Along with the sensitizing dye, a dye that itself does not have spectral sensitizing action or a substance that does not substantially absorb visible light and exhibits supersensitization may be added simultaneously or separately. In the present invention, it is particularly preferable to use a stilbene-based supersensitizer.

  In the present invention, the sensitizing dye may be added at any stage of the preparation of the silver halide emulsion grains, but preferably before the chemical sensitization process, more preferably after the completion of the silver halide grain formation process and before the desalting process. It is. A conventionally known method can be used as the addition method. Preferably, it is added as an aqueous solution or an aqueous dispersion.

  The silver halide grains of the present invention preferably have a number average equivalent circle diameter of 10 nm to 80 nm. More preferably, it is 20 nm or more and 60 nm or less. Especially preferably, they are 30 nm or more and 50 nm or less. In general, when the particle size is too large, the image quality of wavefront reproduction is inferior, and when the particle size is too small, destabilization such as fluctuations in particle size cannot be completely suppressed. In the present invention, a versatile photosensitive material for holography can be obtained by setting the particle size. The silver halide grains of the present invention are preferably monodispersed. The variation coefficient of equivalent circle diameter in terms of projected area of all silver halide grains is preferably 25% or less, more preferably 20% or less, and particularly preferably 15% or less. Here, the variation coefficient of the equivalent circle diameter is a value obtained by dividing the standard deviation of the distribution of equivalent circle diameter in each silver halide grain by the average equivalent circle diameter.

  The equivalent circle diameter can be obtained, for example, by taking a transmission electron micrograph by a direct method and obtaining the diameter of a circle having an area equal to the projected area of each particle (equivalent circle diameter). In the present invention, since the silver halide grains are ultrafine particles, a clear grain image can be obtained by photographing using a high voltage electron microscope at a low temperature.

  The silver halide grains contained in the silver halide emulsion layer of the present invention are preferably normal crystals, and can be octahedral, cubic, tetradecahedral and rounded. Preferably, it is a rounded cube or a cube with clear corners. It is preferable that twins are not mixed. Particularly preferably, the mixing ratio of twin particles is 3% or less, more preferably 1% or less. Here, twins include single twins, double twins, multiple twins, and parallel twins and non-parallel twins.

In the present invention, the silver halide grains are preferably silver bromide, silver iodobromide, silver chloroiodobromide, or silver chlorobromide. The silver iodide content is particularly preferably 1 mol% or more and 5 mol% or less. The silver chloride content is particularly preferably 5 mol% or less. Further, it is preferable that the silver chloride and silver iodide contents of each grain have no distribution. The variation coefficient of the grain distribution of silver chloride and silver iodide content is preferably 20% or less, particularly preferably 10% or less. The EPMA method (Electron Probe Micro Analyzer method) is usually effective for measuring the silver chloride and silver iodide content of individual grains. By preparing a sample in which emulsion grains are dispersed so as not to contact each other and analyzing the X-rays emitted by irradiating with an electron beam, it is possible to perform elemental analysis of a very small region irradiated with the electron beam. . At this time, the measurement is preferably performed by cooling to a low temperature in order to prevent the sample from being damaged by the electron beam.
Since the silver halide grains of the present invention are ultrafine particles, it is not easy to impart a halogen composition structure, but a structure having an internal high silver iodide content, a structure having an external high silver iodide content, and the like are possible. The same applies to the structure of silver chloride. Furthermore, a multilayer structure having a triple structure or more is also possible.

  The silver halide grains of the present invention can be prepared by a conventionally known method. Preferably, a silver nitrate aqueous solution and a halogen aqueous solution are added to the gelatin aqueous solution by the double jet method. At this time, it is preferable to add at an accelerated flow rate. Moreover, it is preferable to control the pH and pAg of the system at the time of addition. The pH is preferably in the range of 5-8. The pAg is preferably in the range of 5-9. For the preparation of ultrafine particles, the temperature is preferably low, and particularly preferably in the range of 20 ° C to 40 ° C. Various additives described later can be added for particle size adjustment, particle size distribution adjustment, sensitivity / fogging adjustment, gradation / development progress adjustment, and the like.

The silver halide emulsion used in the present invention is chemically sensitized. Particularly preferably, gold-chalcogen sensitization and reduction sensitization are performed during chemical sensitization. Here, chemical sensitization means a process corresponding to a chemical sensitization process when the silver halide emulsion production process is divided into three stages of a grain formation process, a water washing process, and a chemical sensitization process according to time. Chemical sensitization is a process in which various chemical sensitizers are added and the temperature is raised and ripened. By combining gold-chalcogen sensitization and reduction sensitization at the time of chemical sensitization, extremely high sensitivity can be achieved, and the storage stability can be brought to a level that causes no problem in practice. For chalcogen sensitization and noble metal sensitization, TH James, The Photographic Process, 4th edition, published by Macmillan, 1977, (TH James, The Theory of the Photographic. (Process, 4th ed, McCillan, 1977), pages 67-76. Research Disclosure, Volume 120, April 1974, 12008; Research Disclosure, Volume 34, June 1975, 13452, U.S. Pat. Nos. 2,642,361, 3,297,446, 3,772,031, 3,857,711, 3,901,714, 4,266,018, and 3,904,415, and British Patent 1,315 , 755, sulfur, selenium, tellurium chalcogen sensitizers and gold sensitizers in addition to platinum, palladium, iridium or these sensitizers at pAg 5-10, pH 5-8, and temperature 30-80 ° C. It can be a plurality of combinations of sensitizers. In the case of gold sensitization, known compounds such as chloroauric acid, potassium chloroaurate, potassium aurithiocyanate, gold sulfide, and gold selenide can be used. The palladium compound means a palladium divalent salt or a tetravalent salt. Preferred palladium compounds are represented by R ₂ PdX ₆ or R ₂ PdX ₄ . Here, R represents a hydrogen atom, an alkali metal atom or an ammonium group. X represents a halogen atom and represents a chlorine, bromine or iodine atom.

Specifically, K ₂ PdCl ₄ , (NH ₄ ) ₂ PdCl ₆ , Na ₂ PdCl ₄ , (NH ₄ ) ₂ PdCl ₄ , Li ₂ PdCl ₄ , Na ₂ PdCl ₆ or K ₂ PdBr ₄ is preferable. Gold compounds and palladium compounds are preferably used in combination with thiocyanate or selenocyanate.

  As sulfur sensitizers, hypo, thiourea compounds, rhodanine compounds and sulfur described in US Pat. Nos. 3,857,711, 4,266,018 and 4,054,457 Containing compounds can be used. Chemical sensitization can also be performed in the presence of a so-called chemical sensitization aid. Useful chemical sensitization aids include compounds known to suppress fog and increase sensitivity during the process of chemical sensitization, such as azaindene, azapyridazine, and azapyrimidine. Examples of chemical sensitization aid modifiers are disclosed in U.S. Pat. Nos. 2,131,038, 3,411,914, 3,554,757, JP-A-58-126526, and the above-mentioned daffine. It is described in the book “photographic emulsion chemistry”, pp. 138-143.

A preferable amount of the gold sensitizer is 1 × 10 ⁻⁶ to 1 × 10 ⁻² mol per mol of silver halide, and more preferably 1 × 10 ^{−5 to} 5 × 10 ⁻³ mol. A preferred range for the palladium compound is 1 × 10 ⁻³ to 5 × 10 ⁻⁷ mole per mole of silver halide. A preferable range of the thiocyan compound or selenocyan compound is 1 × 10 ⁻⁴ to 1 × 10 ⁻² mol per mol of silver halide.

The preferred amount of sulfur sensitizer used for the silver halide grains used in the present invention is 1 × 10 ⁻⁶ to 1 × 10 ⁻² mol per mol of silver halide, more preferably 1 × 10 ^−5. ~ ^5x10-3 mole.

  Selenium sensitization is a preferred chalcogen sensitization method for the emulsion of the present invention. In selenium sensitization, a known unstable selenium compound is used. Specifically, colloidal metal selenium, selenoureas (for example, N, N-dimethylselenourea, N, N-diethylselenourea), selenoketones Selenium compounds such as selenoamides can be used. In some cases, selenium sensitization is preferably used as chalcogen sensitization in combination with sulfur sensitization.

  In tellurium sensitization, an unstable tellurium compound is used, and JP-A-4-224595, JP-A-4-271341, JP-A-4-3333043, JP-A-5-303157, JP-A-6-27573, JP-A-6-175258, 6-180478, 6-208184, 6-208186, 6-317867, 7-140579, 7-301879, 7-301880, etc. Compounds can be used.

  Specifically, phosphine tellurides (for example, normal butyl-diisopropylphosphine telluride, triisobutylphosphine telluride, trinormal butoxyphosphine telluride, triisopropylphosphine telluride), diacyl (di) tellurides (for example, bis (Diphenylcarbamoyl) ditelluride, bis (N-phenyl-N-methylcarbamoyl) ditelluride, bis (N-phenyl-N-methylcarbamoyl) telluride, bis (N-phenyl-N-benzylcarbamoyl) telluride, bis (ethoxycarbonyl) Telluride), telluroureas (for example, N, N′-dimethylethylenetellurourea), telluramides, telluroesters and the like may be used. Preferred are phosphine tellurides and diacyl (di) tellurides.

  The silver halide emulsion of the present invention is preferably subjected to reduction sensitization in addition to gold-chalcogen sensitization during chemical sensitization. Here, the reduction sensitization means a method of adding a reduction sensitizer to a silver halide emulsion, a method of ripening in a low pAg atmosphere called silver ripening, and a high pH of 8-11 called high pH ripening. Any method of aging in a pH atmosphere can be selected. Two or more methods can be used in combination.

The method of adding a reduction sensitizer is a preferable method in that the level of reduction sensitization can be finely adjusted. As reduction sensitizers, for example, stannous salts, ascorbic acid and derivatives thereof, amines and polyamines, hydrazine derivatives, formamidine sulfinic acid, silane compounds, and borane compounds are known. In the reduction sensitization used in the present invention, these known reduction sensitizers can be selected and used, and two or more kinds of compounds can be used in combination. As a reduction sensitizer, stannous chloride, thiourea dioxide, dimethylamine borane, ascorbic acid and derivatives thereof are preferable compounds. Since the addition amount of the reduction sensitizer depends on the emulsion production conditions, it is necessary to select the addition amount, but a range of 10 ⁻⁷ to 10 ⁻³ mol per mol of silver halide is appropriate.

  For example, the reduction sensitizer is dissolved in water or an organic solvent such as alcohols, glycols, ketones, esters, and amides and added during chemical sensitization. The timing of addition may be before or after the addition of the gold sensitizer and chalcogen sensitizer. Preferably, a reduction sensitizer is added and ripened, then a chalcogen sensitizer and a gold sensitizer are added and further ripened to terminate chemical sensitization. It is also preferable to add the reduction sensitizer solution in several portions or continuously for a long time.

In the present invention, the tetrazaindene compound is preferably contained in an amount of 3 × 10 ⁻³ mol to 3 × 10 ⁻² mol per mol of silver in the silver halide grains. The tetrazaindene compounds used in the present invention are known as photographic emulsion stabilizers and antifoggants, and are described in Research Disclosure 307, 866. The tetrazaindene compound used in the present invention is preferably a tetrazaindene compound having a hydroxy group as a substituent, particularly a hydroxytetrazaindene compound. The heterocyclic ring may have a substituent other than a hydroxy group. Examples of the substituent include an alkyl group, an amino group, a hydroxyamino group, an alkylamino group, a dialkylamino group, an arylamino group, a carboxy group, an alkoxycarbonyl group, a halogen atom, an acylamino group, and a cyano group. Also good. However, those having a substituent containing sulfur (for example, a mercapto group) are not preferable.

Specific examples of tetrazaindene compounds preferable for the present invention are listed below, but are not limited thereto.
1. 4-hydroxy-6-methyl-1,3,3a, 7-tetrazaindene 4-hydroxy-6-tert-butyl-1,3,3a, 7-tetrazaindene 4-Hydroxy-6-phenyl-1,3,3a, 7-tetrazaindene 4. Hydroxy-1,3,3a, 7-tetrazaindene 4-Methyl-6-hydroxy-1,3,3a, 7-tetrazaindene 6. 2-methylthio-4-hydroxy-6-methyl-1,3,3a, 7-tetrazaindene 7. 4-hydroxy-5-bromo-6-methyl-1,3,3a, 7-tetrazaindene 4-Hydroxy-6-methyl-1,2,3a, 7-tetrazaindene9. 4-hydroxy-6-ethyl-1,2,3a, 7-tetrazaindene 10.2,4-dihydroxy-6-phenyl-1,3,3a, 7-triazaindene 11. 4-hydroxy-6- Phenyl-1,2,3,3a, 7-pentazaindene

The amount of these tetrazaindene compounds added is preferably 3 × 10 ⁻³ mol to 3 × 10 ⁻² mol, preferably 10 ⁻⁴ mol to 3 × 10 ⁻² mol, and more preferably 6 mol per mol of silver halide. × a 10 ^-3 mol to 2 × 10 ^-2 mol, the initiation of chemical sensitization before, during chemical sensitization, after chemical sensitization, it is preferably added to either the timing at the time of application.

In the present invention, it is preferable that 1 × 10 ⁻⁴ or more and 1 × 10 ⁻² mol or less of thiocyanate is contained per 1 mol of silver in the silver halide grains. More preferably, 5 × 10 ⁻⁴ or more and 5 × 10 ⁻³ mol or less of thiocyanate is contained per 1 mol of silver in the silver halide grains. If the amount is too small, the effect of increasing the sensitivity is small, and if the amount is too large, the deteriorating effect due to destabilization of the grain size variation of the thiocyanate as a silver halide solvent becomes too large. In the present invention, a silver halide solvent other than thiocyanate is also preferably used. Examples of the silver halide solvent include U.S. Pat. Nos. 3,271,157, 3,531,286, 3,574,628, and JP-A Nos. 54-1019 and 54-1558917. (B) thiourea derivatives described in (a) organic thioethers described in JP-A Nos. 53-82408, 55-77737, 55-2982, and the like, described in JP-A-53-144319 (C) a silver halide solvent having a thiocarbonyl group sandwiched between an oxygen or sulfur atom and a nitrogen atom, (d) imidazoles described in JP-A No. 54-1000071, and (e) a sulfite (F) ammonia and the like.

The timing of addition of the thiocyanate preferably used in the present invention may be any stage in the preparation of the silver halide emulsion grains, but is preferably applied after completion of the silver halide grain formation process, more preferably after completion of the desalting process. Before the process. Particularly preferred is the chemical sensitization step. As an addition method, it is preferable to add as an aqueous solution. The thiocyanate is preferably KSCN, NaSCN, or NH ₄ SCN.

In the present invention, the iridium salt is preferably contained in an amount of 1 × 10 ⁻⁴ mol to 1 × 10 ⁻² mol per mol of silver in the silver halide grains. By containing the added amount of iridium salt, the destabilizing effect on the silver halide ultrafine particles due to the use of the silver halide solvent can be remarkably suppressed. Particularly preferably, the iridium salt is contained in an amount of 2 × 10 ⁻⁴ mol to 1 × 10 ⁻³ mol per mol of silver in the silver halide grains.

  In the present invention, the iridium salt may be added at any stage in the preparation of silver halide emulsion grains, but is preferably in the process of forming silver halide grains. As an addition method, it is preferably added as an aqueous solution.

As the iridium salt, a trivalent or tetravalent iridium complex is preferably used. Typical iridium salts include K ₃ IrCl ₆ , K ₂ IrCl ₆ , K ₃ IrCl ₅ (H ₂ O), K ₂ IrCl ₅ (H ₂ O), and the like. In addition to the K salt, sodium salts and ammonium salts are also preferably used. As the ligand for Ir, those conventionally known besides Cl and H ₂ O are used. Preferably, an iridium complex containing an organic ligand described in JP-A-7-072569 is used. More preferably, an iridium complex containing a cyano group described in JP-A-2-761027 is used.

In the present invention, it is preferable that 6 cyano metal complex is doped in the silver halide grains in addition to the iridium salt. Among the 6 cyano metal complexes, those containing iron, ruthenium, osmium, cobalt, rhodium, iridium or chromium are preferred. The addition amount of the metal complex is preferably in the range of 10 ^{−6 to} 10 ⁻² mol per mol of silver halide, and more preferably in the range of 10 ^{−5 to} 10 ⁻³ mol per mol of silver halide. preferable. The metal complex can be added by dissolving in water or an organic solvent. The organic solvent is preferably miscible with water. Examples of the organic solvent include alcohols, ethers, glycols, ketones, esters, and amides.

  As the metal complex, a 6-cyano metal complex represented by the following formula (I) is particularly preferable.

(I) [M (CN) ₆ ] ^n-
(Wherein M is iron, ruthenium, osmium, cobalt, rhodium, iridium or chromium, and n is 3 or 4).

Specific examples of 6-cyano metal complexes are shown below.
(I-1) [Fe (CN) ₆ ] ^4-
(I-2) [Fe (CN) ₆ ] ³⁻
(I-3) [Ru (CN) ₆ ] ^4-
(I-4) [Os (CN) ₆ ] ^4-
(I-5) [Co (CN) ₆ ] ³⁻
(I-6) [Rh (CN) ₆ ] ³⁻
(I-7) [Ir (CN) ₆ ] ³⁻
(I-8) [Cr (CN) ₆ ] ⁴⁻ .

  The counter cation of the hexacyano complex is preferably an ion that is easily miscible with water and is compatible with the precipitation operation of the silver halide emulsion. Examples of counter ions include alkali metal ions (eg, sodium ions, potassium ions, rubidium ions, cesium ions, lithium ions), ammonium ions and alkylammonium ions.

  The holographic silver halide photosensitive material of the present invention preferably contains a low molecular weight gelatin. More preferably, low molecular weight gelatin is contained in the silver halide emulsion. The low molecular weight gelatin in the present invention means that having a number average molecular weight of 3000 to 50000. More preferably, the number average molecular weight is 10,000 to 30,000. The gelatin used in the present invention may be subjected to the following various modification treatments. For example, phthalated gelatin modified with amino group, succinylated gelatin, trimellit gelatin, pyromellitic gelatin, esterified gelatin modified with carboxyl group, amidated gelatin, formylated gelatin modified with imidazole group, methionine group decreased And oxidized reduced gelatin and increased reduced processed gelatin.

  On the other hand, other hydrophilic colloids can also be used. For example, gelatin derivatives, graft polymers of gelatin and other polymers, proteins such as albumin and casein; cellulose derivatives such as hydroxyethyl cellulose, carboxymethyl cellulose and cellulose sulfates, sugar derivatives such as sodium alginate and starch derivatives Various synthetic hydrophilic polymers such as polyvinyl alcohol, polyvinyl alcohol partial acetal, poly-N-vinyl pyrrolidone, polyacrylic acid, polymethacrylic acid, polyacrylamide, polyvinyl imidazole, polyvinylpyrazole, or a single or copolymer Substances can be used. Examples of gelatin include lime-processed gelatin, acid-processed gelatin, and Bull. Soc. Sci. Photo. Japan. No. 16. An enzyme-treated gelatin as described in P30 (1966) may be used, and a hydrolyzate or enzyme-decomposed product of gelatin can also be used.

  The silver halide emulsion used in the present invention is usually washed with water. The temperature for washing with water can be selected according to the purpose, but is preferably selected within the range of 5 ° C to 50 ° C. The pH at the time of washing with water can be selected according to the purpose, but is preferably selected between 2 and 10. More preferably, it is the range of 3-8. Although pAg at the time of water washing can also be selected according to the objective, it is preferable to select between 5-10. The washing method can be selected from a noodle washing method, a dialysis method using a semipermeable membrane, a centrifugal separation method, a coagulation sedimentation method, and an ion exchange method. In the case of the coagulation sedimentation method, a method using a sulfate, a method using an organic solvent, a method using a water-soluble polymer, a method using a gelatin derivative and the like can be selected.

  The silver halide emulsion for use in the present invention may contain various compounds for the purpose of preventing fogging during the production process, storage or processing of the light-sensitive material, or stabilizing the photographic performance. That is, thiazoles such as benzothiazolium salts, nitroimidazoles, nitrobenzimidazoles, chlorobenzimidazoles, bromobenzimidazoles, mercaptothiazoles, mercaptobenzothiazoles, mercaptobenzimidazoles, mercaptothiadiazoles, amino Triazoles, benzotriazoles, nitrobenzotriazoles, mercaptotetrazoles (especially 1-phenyl-5-mercaptotetrazole); mercaptopyrimidines; mercaptotriazines; , Triazaindenes, tetraazaindenes (especially 4-hydroxy substituted (1,3,3a, 7) tetraazaindenes), pentaazaindenes Known as antifoggants or stabilizers, such as, it can be added to many compounds. For example, those described in US Pat. Nos. 3,954,474, 3,982,947, and Japanese Patent Publication No. 52-28660 can be used. One preferred compound is a compound described in JP-A-63-212932. Antifoggants and stabilizers are used at various times before particle formation, during particle formation, after particle formation, water washing process, dispersion after water washing, chemical sensitization, during chemical sensitization, after chemical sensitization, and before coating. It can be added depending on the purpose. In addition to the original antifogging and stabilizing effect added during emulsion preparation, control the crystal wall of grains, reduce grain size, reduce grain solubility, control chemical sensitization, It can be used for various purposes such as controlling the arrangement of dyes.

In preparation of the emulsion of the present invention, for example, at the time of grain formation, desalting step, chemical sensitization, it is preferable that a metal ion salt is present before coating, depending on the purpose. When the particles are doped, it is preferably added after the formation of the particles, before the completion of the chemical sensitization after the formation of the particles when used as a particle sensitizer or a chemical sensitizer. A method of doping the entire particle and a method of doping only the core portion or the shell portion of the particle can also be selected. For example, Mg, Ca, Sr, Ba, Al, Sc, Y, La, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ru, Rh, Pd, Re, Os, Ir, Pt, Au, Cd, Hg, Tl, In, Sn, Pb, and Bi can be used. These metals can be added in the form of a salt that can be dissolved during particle formation, such as ammonium salt, acetate salt, nitrate salt, sulfate salt, phosphate salt, hydrate salt, hexacoordinated complex salt, and tetracoordinated complex salt. For _{example, CdBr 2, CdCl 2, Cd} (NO 3) 2, Pb (NO 3) 2, Pb (CH 3 COO) 2, K 3 [Fe (CN) 6], (NH 4) 4 [Fe (CN) ₆ ], K ₃ IrCl ₆ , (NH ₄ ) ₃ RhCl ₆ , and K ₄ Ru (CN) ₆ . The ligand of the coordination compound can be selected from halo, aco, cyano, cyanate, thiocyanate, nitrosyl, thionitrosyl, oxo and carbonyl. These may use only one kind of metal compound, but may be used in combination of two or more kinds.

The metal compound is preferably added after being dissolved in water or a suitable organic solvent such as methanol or acetone. In order to stabilize the solution, a method of adding an aqueous hydrogen halide solution (for example, HCl, HBr) or an alkali halide (for example, KCl, NaCl, KBr, NaBr) can be used. Moreover, you may add an acid, an alkali, etc. as needed. The metal compound can be added to the reaction vessel before particle formation or can be added during particle formation. Further, it can be added to a water-soluble silver salt (for example, AgNO ₃ ) or an alkali halide aqueous solution (for example, NaCl, KBr, KI) and continuously added during the formation of silver halide grains. Further, a solution independent of the water-soluble silver salt and alkali halide may be prepared and added continuously at an appropriate time during grain formation. It is also preferable to combine various addition methods.

In the emulsion of the present invention, an oxidizing agent for silver is preferably used. The oxidizing agent for silver refers to a compound having an action of acting on metallic silver and converting it into silver ions. Particularly effective are compounds capable of converting extremely fine silver grains by-produced in the process of forming silver halide grains and chemical sensitization into silver ions. The silver ions generated here may form, for example, a silver salt that is hardly soluble in water such as silver halide, silver sulfide, or silver selenide, or a silver salt that is easily soluble in water such as silver nitrate. May be formed. The oxidizing agent for silver may be an inorganic substance or an organic substance. Examples of the inorganic oxidizing agent include ozone, hydrogen peroxide and adducts thereof (for example, NaBO ₂ .H ₂ O ₂ .3H ₂ O, 2NaCO ₃ .3H ₂ O ₂ , Na ₄ P ₂ O ₇ .2H _{2). O 2, 2Na 2 SO 4 ·} H 2 O 2 · 2H 2 O), peroxy acid salt _{(e.g., K 2 S 2 O 8,} K 2 C 2 O 6, K 2 P 2 O 8), peroxy complex compound ( For _{example, K 2 [Ti (O 2} ) C 2 O 4] · 3H 2 O, 4K 2 SO 4 · Ti (O 2) OH · SO 4 · 2H 2 O, Na 3 [VO (O 2) (C 2 H ₄ ) ₂ ] · 6H ₂ O), permanganate (eg, KMnO ₄ ), chromate (eg, K ₂ Cr ₂ O ₇ ), oxyacid salts, and halogen elements such as iodine and bromine Perhalogenates (eg potassium periodate), high atoms Metal salts (e.g., hexacyanoferrate potassium ferric acid), and thiosulfonate.

  Examples of organic oxidizing agents include quinones such as p-quinone, organic peroxides such as peracetic acid and perbenzoic acid, and compounds that release active halogens (for example, N-bromosuccinimide, chloramine T, An example is chloramine B).

  Preferred oxidizing agents used in the present invention are ozone, hydrogen peroxide and its adducts, halogen elements, thiosulfonate inorganic oxidizing agents, and quinone organic oxidizing agents. It is a preferred embodiment to use the aforementioned reduction sensitization in combination with an oxidizing agent for silver. A method of applying reduction sensitization after using an oxidizing agent, a reverse method thereof, or a method of simultaneously coexisting both can be used. These methods can be selected and used in either the particle formation step or the chemical sensitization step.

  The silver halide photosensitive material for holography of the present invention preferably contains a dye having a maximum value of spectral absorption between 550 nm and 600 nm. More preferably, it contains a dye having a maximum value of spectral absorption between 560 nm and 590 nm. While this dye has high sensitivity to typical laser light, it can handle the photosensitive material under an orange lamp instead of all dark. Since the photosensitive material can be handled under an orange lamp, the burden during processing such as holographic photography and development is reduced, and versatility is improved. An orange lamp can be easily obtained by attaching a filter or the like that transmits light of 550 nm to 600 nm to the light source. Preferably, the maximum value of the spectral absorption of the dye is in the range of 0.3 to 2.0 in terms of transmission absorbance. A high transmission absorbance improves safety against seflight and is preferable because it can be handled under an orange light for a long time. However, the sensitivity to typical laser light decreases due to absorption by the absorption edge of the dye. So there is a suitable range. From this viewpoint, the half-value width of dye absorption is preferably 80 nm or less, more preferably 50 nm or less. The spectral absorption wavelength and transmission absorbance can be determined by measuring the transmission spectral absorption of the photosensitive material with reference to air with a normal spectrophotometer.

  Any dye that satisfies the above requirements may be used. Preferably, it is a water-soluble dye or a solid disperse dye that can be discharged or decolored by processing. Particularly preferred are water-soluble dyes that do not affect various properties such as the sensitivity of the silver halide emulsion. The water-soluble dye can be added directly to the silver halide emulsion layer, or can be added to the protective layer and the back layer. It is also possible to use them together.

  The silver halide light-sensitive material for holography of the present invention includes a hydrazine compound having an adsorbing group for silver halide described in JP-A-07-134351, and a hydroxamic acid described in JP-A-08-114884 and 08-314051. It is particularly preferable to contain a compound based on a compound, a hydroxysemicarbazide compound described in JP-A No. 10-090819, and a hydroxylamine compound having an adsorbing group for silver halide described in JP-A No. 2002-323729. The addition of these compounds can be selected from the formation of emulsion grains until coating, but is preferably selected from the time of chemical sensitization or subsequent coating. Although the addition amount is also arbitrary, as a feature of the ultrafine grain emulsion, it may be preferable to use a large excess amount 10 times or more than the amount described in these patents. The specific addition amount can be easily determined experimentally.

A compound in which a one-electron oxidant produced by one-electron oxidation can emit one electron or more is preferably used in the photosensitive material of the present invention. These compounds are compounds selected from the following types 1 and 2.
(Type 1)
A compound in which a one-electron oxidant formed by one-electron oxidation can further emit one or more electrons with a subsequent bond cleavage reaction.
(Type 2)
A compound capable of emitting one or more electrons after a one-electron oxidant produced by one-electron oxidation undergoes a subsequent bond formation reaction.

First, the compound of type 1 will be described.
JP-A-9-211769 (specific example: 28-) shows a compound that can be emitted from a one-electron oxidant produced by one-electron oxidation of a type 1 compound, with a subsequent bond cleavage reaction. Compounds PMT-1 to S-37 described in Table E and Table F on page 32), JP-A-9-211774, JP-A-11-95355 (specific examples: compounds INV1-36), JP-T 2001-500996 (Specific Examples: Compounds 1-74, 80-87, 92-122), US Pat. No. 5,747,235, US Pat. No. 5,747,236, European Patent 786662A1 (Specific Examples: Compounds INV1-35), “One-photon two-electron sensitizer” or “deprotonated electron-donating sensitizer” described in patents such as European Patent No. 893732A1, US Pat. No. 6,054,260, US Pat. No. 5,994,051 Compounds referred to. The preferred ranges of these compounds are the same as the preferred ranges described in the cited patent specifications.

  Japanese Patent Application Laid-Open No. 2003-114487 is a type 1 compound that can emit one electron or more when a one-electron oxidant produced by one-electron oxidation is accompanied by a subsequent bond cleavage reaction. General formula (1) described in JP-A-2003-114487, general formula (2) described in JP-A-2003-114487, general formula (1) described in JP-A-2003-114488, and general formula described in JP-A-2003-114488 (2), general formula (3) described in JP-A-2003-114488, general formula (1) described in JP-A-2003-75950, general formula (2) described in JP-A-2003-75950, The reaction represented by the general formula (1) described in Japanese Patent Application No. 2004-239934 (Japanese Patent Application No. 2003-25886) or the chemical reaction formula (1) described in Japanese Patent Application Laid-Open No. 2004-245929 (Japanese Patent Application No. 2003-33446). Compounds represented among the compounds capable of causing 2004-245929 general formula according to (Japanese Patent Application No. 2003-33446) No. (3) can be mentioned. The preferred ranges of these compounds are the same as the preferred ranges described in the cited patent specifications.

Next, the type 2 compound will be described.
Japanese Patent Application Laid-Open No. 2003-140287 discloses a compound in which a one-electron oxidant produced by one-electron oxidation with a type 2 compound can further emit one or more electrons with a subsequent bond formation reaction. A compound capable of causing the reaction represented by the chemical reaction formula (1) described in JP-A No. 2004-245929 (Japanese Patent Application No. 2003-33446), which is disclosed in JP-A No. 2004-245929 (Japanese Patent Application No. 2003). -33446) and the compound represented by the general formula (2). The preferred ranges of these compounds are the same as the preferred ranges described in the cited patent specifications.

  Of the compounds of types 1 and 2, “a compound having an adsorptive group to silver halide in the molecule” or “a compound having a partial structure of a spectral sensitizing dye in the molecule” is preferable. Typical examples of the adsorptive group to silver halide are those described in JP-A No. 2003-156823, page 16, right line 1 to page 17, right line 12. The partial structure of the spectral sensitizing dye is a structure described on page 17, right line 34 to page 18, left line 6 of the same specification.

  More preferably, the compound of type 1 or 2 is “a compound having at least one adsorptive group to silver halide in the molecule”. More preferred is “a compound having two or more adsorptive groups to silver halide in the same molecule”. When two or more adsorptive groups are present in a single molecule, these adsorptive groups may be the same or different.

  The adsorptive group is preferably a mercapto-substituted nitrogen-containing heterocyclic group (for example, 2-mercaptothiadiazole group, 3-mercapto-1,2,4-triazole group, 5-mercaptotetrazole group, 2-mercapto-1,3,4). -Oxadiazole group, 2-mercaptobenzoxazole group, 2-mercaptobenzthiazole group, 1,5-dimethyl-1,2,4-triazolium-3-thiolate group, etc.) or imino silver (> NAg) And a nitrogen-containing heterocyclic group having a —NH— group as a heterocyclic partial structure (for example, a benzotriazole group, a benzimidazole group, an indazole group, etc.). Particularly preferred are 5-mercaptotetrazole group, 3-mercapto-1,2,4-triazole group, and benzotriazole group, most preferred are 3-mercapto-1,2,4-triazole group, and 5 -Mercaptotetrazole group.

  The type 1 and type 2 compounds of the present invention may be used at any time during the preparation of the emulsion or during the photosensitive material production process. For example, at the time of particle formation, desalting step, chemical sensitization, and before coating. Moreover, it can also add in several steps in these processes. The addition position is preferably from the end of particle formation to before the desalting step, at the time of chemical sensitization (from immediately before the start of chemical sensitization to immediately after the end), and before application, more preferably at the time of chemical sensitization and before application.

  The compounds of type 1 and type 2 of the present invention are preferably added after being dissolved in water, a water-soluble solvent such as methanol or ethanol, or a mixed solvent thereof. When the compound is dissolved in water, the compound having higher solubility when the pH is increased or decreased may be dissolved at a higher or lower pH and added.

The compounds of type 1 and type 2 of the present invention are preferably used in the emulsion layer, but may be added to the protective layer or intermediate layer together with the emulsion layer and diffused during coating. The timing of addition of the compound of the present invention is preferably 1 × 10 ^{−9 to} 5 × 10 ⁻² mol, more preferably 1 × 10 ⁻⁸ to ² mol, per mol of silver halide, regardless of before and after the sensitizing dye. X10 ^-3 mol in a silver halide emulsion layer.

  The above-mentioned various additives are used in the light-sensitive material according to the present invention, but various additives can be used depending on the purpose.

  These additives are described in more detail in Research Disclosure Item 17643 (December 1978), Item 18716 (November 1979), and Item 308119 (December 1989). These are summarized in the table below.

Additive type RD17643 RD18716 RD308119
1 Chemical sensitizer page 23 page 648 right column page 996
2 Sensitivity increasing agent Same as above
3 Spectral sensitizer, pages 23 to 24, page 648, right column to 996, right to 998 right Supersensitizer, page 649, right column
4 Brightener 24 pages 647 right column 998 right
5 Antifoggant, 24-25 pages 649, right column 998 right-1000 right and stabilizer
6 Light absorber, page 25-26, page 649, right column to 1003, left to 1003 right Filter dye, page 650, left column, UV absorber
7 Stain inhibitor Page 25 Right column 650 Left to right column 1002 Right
8 Dye image stabilizer 25 page 1002 right
9 Hardener page 26 page 651 left column 1004 right to 1005 left
10 Binder page 26 Same as above 1003 right to 1004 right
11 Plasticizer, Lubricant 27 pages 650 right column 1006 left to 1006 right
12 Coating aid, pages 26-27 Same as above 1005 Left to 1006 Left Surfactant
13 Static 27 pages Same as above 1006 Right to 1007 Left Anti-blocking agent
14 Matting agent 1008 left to 1009 left.

  Further, in order to prevent deterioration of photographic performance due to formaldehyde gas, a compound capable of reacting with formaldehyde described in U.S. Pat. Nos. 4,411,987 and 4,435,503 is immobilized on a photosensitive material. It is preferable to add.

  In the light-sensitive material of the present invention, for example, phenethyl alcohol, JP-A-63-257747, JP-A-62-272248, and JP-A-1-80941, for example, 1,2-benzisothiazolin-3-one, Add various preservatives or antifungal agents such as n-butyl-p-hydroxybenzoate, phenol, 4-chloro-3,5-dimethylphenol, 2-phenoxyethanol, 2- (4-thiazolyl) benzimidazole Is preferred.

As the support, a support usually used for silver halide light-sensitive materials can be used, and glass, TAC, PET, PEN and the like can be mentioned as representative examples. Preferably, glass or TAC having no optical anisotropy is used. Selection of the thickness of a support body can be suitably selected according to the use and usage method. The above emulsion layer is coated on these supports. Further, in addition to the emulsion layer, a protective layer, a YF layer, an intermediate layer, a halation prevention layer, an undercoat layer, a back layer and the like can be appropriately selected and applied depending on the purpose. For a flexible support such as TAC, the application of a back layer is extremely effective in order to keep its curl characteristics good. Further, when there is no protective layer, a matting agent or the like can be introduced into the back layer to improve the adhesion between the samples. In addition, various troubles caused by static electricity, such as dust adhesion, can be positively eliminated by adjusting the chargeability.
The amount of coated silver and coated gelatin in the silver halide emulsion layer and various layers are not particularly limited. The applied silver amount is preferably in the range of 1 g / m ² to 10 g / m ² . The amount of coated gelatin is preferably in the range of 1 g / m ² to 10 g / m ² . The silver / gelatin coating amount ratio can also be selected within an arbitrary range. Preferably it is the range of 0.3-2.0. The coating film thickness is preferably in the range of usually 3 μm to 12 μm. If it is too thin, the interference wave cannot be recorded sufficiently, and if it is too thick, the resolving power decreases due to an increase in light scattering or the like. The swelling film thickness in the treatment step can be arbitrarily selected by adjusting the amount of the hardener used. Preferably, the degree of hardening is strengthened so that the film thickness after processing is not changed, that is, silver halide, gelatin and the like are not lost. In the case of layered dura mater, it is preferable that the lower layer dura is loosened with respect to the upper layer.

  For the method of interference wave recording, processing method, reproduction method, and utilization method of silver halide photosensitive material for holography in the present invention, refer to holography technology, the latest knowledge in the scientific field, etc. Can be. Representative reference books include Toshihiro Kubota, Introduction to Holography, Principles and Practice, Asakura Shoten, 1995, and the like. The light-sensitive material of the present invention can naturally be applied as described in these reference books, and the application becomes simple using high sensitivity, high image quality, and stability.

[Example]
The principle of the present invention will be described below with reference to examples.

(Preparation of silver halide photosensitive material)
1659 mL of an aqueous solution containing 0.28 g of KBr and 33.3 g of phthalated deionized bone gelatin having a number average molecular weight of 100,000 was kept at 34 ° C. and stirred. After adding an aqueous solution containing 0.04 g of thiourea dioxide, the pH was adjusted to 6.0. 800 ml of an aqueous solution of AgNO ₃ (96.0 g) and an aqueous KBr solution containing 1 mol% of KI were added over 15 minutes by the double jet method. At this time, the silver potential was kept at +20 mV with respect to the saturated calomel electrode. After adding 6.7 × 10 ⁻⁴ mol of supersensitizer I per mol of silver halide, sensitizing dye III was added at 4.3 × 10 ⁻⁴ mol per mol of silver halide. . Thereafter, 6.1 × 10 ⁻⁴ mol of sensitizing dye I was added to 1 mol of silver halide. Thereafter, 5.2 × 10 ⁻⁴ mol of sensitizing dye II was added to 1 mol of silver halide. In this experiment, the sensitizing dye was used as a solid fine dispersion prepared by the method described in JP-A No. 11-52507. That is, 0.8 parts by mass of sodium nitrate and 3.2 parts by mass of sodium sulfate were dissolved in 43 parts by mass of ion-exchanged water, 13 parts by mass of a sensitizing dye was added, and 20 ° C. at 2000 rpm using a dissolver blade at 60 ° C. By dispersing for a minute, a solid dispersion of a sensitizing dye was obtained.

After the temperature was lowered to 32 ° C., normal water washing was performed. After adding 21 g of deionized bone gelatin that had been oxidized with a number average molecular weight of 20000, the pH was adjusted to 8.0 at 45 ° C. The temperature was raised to 60 ° C., and thiourea dioxide (8.0 × 10 ⁻⁵ mol), antifoggant I (4.5 × 10 ⁻³ mol), chloroauric acid (4) per 1 mol of silver halide. 0.1 × 10 ⁻⁴ mol) and sodium thiosulfate (1.2 × 10 ⁻³ mol) were sequentially added to optimally perform chemical sensitization. Antifogging agent II (2.5 × 10 ⁻⁴ mol) was added to complete the chemical sensitization.
This emulsion was cubic grains having a number average equivalent circle diameter of 38 nm and a variation coefficient of equivalent circle diameter of 7%. These grains are silver bromide grains containing 1 mol% of silver iodide.

  An emulsion in which a back layer is coated on one side of a 200 μm thick cellulose triacetate film support provided with an undercoat layer and subjected to the above chemical sensitization on the other side under the coating conditions shown in Table 1 below. Application was performed to prepare an application sample.

  The back layer was applied as follows.

<Preparation and application of conductive layer coating solution>
The following compound was added to the gelatin aqueous solution and coated so that the gelatin coating amount was 0.06 g / m ² .
SnO ₂ / Sb (9/1 mass ratio, average particle size 0.25 μ) 186 mg / m ²
Gelatin (Ca ⁺⁺ content 3000 ppm) 60 mg / m ²
Sodium p-dodecylbenzenesulfonate 13 mg / m ²
Dihexyl-α-sulfosuccinate sodium 12 mg / m ²
Sodium polystyrene sulfonate 10mg / m ²
Compound-A 1 mg / m ²
<Preparation and application of back layer coating solution>

The following compound was added to the gelatin aqueous solution and coated so that the gelatin coating amount was 1.94 g / m ² .
Gelatin (Ca ⁺⁺ content 30 ppm) 1.94 mg / m ²
Polymethylmethacrylate fine particles (average particle size 3.4 μ) 15 mg / m ²
Sodium p-dodecylbenzenesulfonate 7 mg / m ²
Dihexyl-α-sulfosuccinate sodium 29 mg / m ²
N-perfluorooctanesulfonyl-N-propyl glycine potassium 5 mg / m ²
Sodium sulfate 150mg / m ²
Sodium acetate 40mg / m ²
Compound-E (hardener) 105 mg / m ²
Compound-C 15 mg / m ²

(Record)
The photosensitive material for holography prepared as above under the Danish-type holographic imaging conditions was used. Helium-neon laser is used for red as a light source, and YAG laser is used for green. Toshihiro Kubota, Introduction to Holography-Principles and Practices, 1995 Asakura Shoten Publishing, p. Referring to the imaging system described in Fig. 5.4 of Fig. 82, Danish-type holography imaging was performed. Ibid, p. 159 was processed according to the formulation of CW-C2 developer + PBQ-2 bleaching solution. Visual evaluation of the reproduced image revealed that a bright and clear color image was obtained. Although blue exposure was not performed in this experiment, it was revealed that a good color reproduction image could be obtained with two colors of red and green. The exposure amount was used here helium - Neonre - The - For 50μJ ^/ cm 2, YAG Le - was 50μJ / cm ² against - The.

A simple reproduction device using red and green LEDs corresponding to the reproduction wave wavelength was manufactured. The above-mentioned 10 × 12 cm hologram can be easily reproduced on a table with a 1.5 V dry cell, and the hologram can be illuminated from above at 45 degrees that is the same angle as the reference light and at a distance of 15 cm. It is what I did. With a simple playback device, a good playback image could be viewed in a bright room.
As described above, even an image shot with only two colors of green light and red light can be seen as a full color three-dimensional image by human eyes, and high sensitivity can be obtained with two colors of green light and red light. It was shown that a sensitive silver salt photosensitive material can be prepared. That is, the principle of the present invention could be shown.

  Using the photosensitive material prepared in Example 1, a person was photographed using 694 nm light by a conventionally known Ruby pulse laser. This is a two-stage creation method in which a reflection type transfer is created through transmission type master imaging. The obtained human hologram is a conventionally known hologram whose white light reproduction wavelength is a single color of yellow green. Various observations and observations by many people were repeated, and it was concluded that the factor of monochromatic equal magnification caused the eerieness of human holograms and hindered generalization. As a result of repeated consideration and simulation, this spookyness disappears due to the pseudo-colorization by red light and green light described in the first embodiment and the reduction of lateral magnification by the reduction optical system described in the text, and can be generalized. The conclusion was reached.

The side view of the example which shows the holography imaging | photography system which records the transmission type hologram of this invention. The top view of the example which shows the holography imaging | photography system which records the transmission type hologram of this invention. The side view of the example which shows the real image reproduction from the transmission type hologram recorded with the holography imaging | photography system of this invention. The top view of the example which shows the real image reproduction from the transmission type hologram recorded with the holography imaging | photography system of this invention. The side view of the example which shows the holography imaging | photography system which records the reflective hologram of this invention through a reduction optical system. The top view of the example which shows the holography imaging | photography system which records the reflective hologram of this invention through a reduction optical system. The side view of the example which shows the holography imaging | photography system which records the reflective hologram of this invention through a reduction optical system. The top view of the example which shows the holography imaging | photography system which records the reflective hologram of this invention through a reduction optical system.

Claims (9)

  Using only two types of pulsed laser light, a pulse laser having a light emission wavelength in the range of 500 nm to less than 600 nm and a pulse laser having a light emission wavelength in the range of 600 nm to less than 700 nm, 1. A holography-photographing system for photographing a person, wherein a transmission hologram having two types of wavelengths is recorded on a piece of silver halide photosensitive material.   The reference angle of the pulse laser having the emission wavelength in the range of 500 nm to less than 600 nm is in the range of 50 ° to 80 °, and the pulse laser having the emission wavelength in the range of 600 nm to less than 700 nm. 2. The holographic imaging system for photographing a person according to claim 1, wherein an incident angle of the reference light is in a range of 20 [deg.] To 45 [deg.].   The object light of the pulse laser having an emission wavelength in the range of 500 nm or more and less than 600 nm and the pulse laser having an emission wavelength in the range of 600 nm or more and less than 700 nm are basically coaxial. Item 3. A holography photographing system for photographing a person according to item 1 or 2.   2. The transmission hologram according to claim 1, wherein only two types of pulse lasers, a pulse laser having an emission wavelength in the range of 500 nm to less than 600 nm and a pulse laser having an emission wavelength in the range of 600 nm to less than 700 nm are used. A holographic imaging system for photographing a person, wherein a reflection hologram having two types of wavelengths is recorded on one silver halide light-sensitive material by using a laser beam.   Reproduction illumination light from a pulse laser having an emission wavelength in the range of 500 nm to less than 600 nm and a pulse laser having an emission wavelength in the range of 600 nm to less than 700 nm of the transmission hologram is used as a reference when creating the transmission hologram. 5. The holography photographing system for photographing a person according to claim 4, wherein the holography photographing system is the same optical system as the light.   6. The holographic imaging system for human photography according to claim 4 or 5, wherein the reproduction wavelength of the reflection hologram is shifted to a short wavelength in a range of 10 nm to 50 nm with respect to the recording wavelength.   7. The holographic imaging system for photographing a person according to claim 4, wherein the reflection hologram is recorded from the transmission hologram through a reduction optical system.   8. The holographic photographing system for photographing a person according to claim 7, wherein a lateral magnification of the reduction is in a range of 0.8 to 0.4.   5. The human photographing according to claim 4, wherein recording of the transmission hologram is performed at many locations with respect to the customer, and recording of the reflection hologram from the transmission hologram is concentrated at a small number of locations. Holographic imaging system.

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