JPH0667362A - Photographic film and information recording and reproducing device - Google Patents

Abstract

PURPOSE:To obtain a photographic film capable of being manufactured at a comparatively simple stage and capable of recording information. CONSTITUTION:As to the photographic film 10, an image recording part 12 recording a photographed image is provided on a film base 11. Perforations 14 and 16 are formed on the upper and lower parts of the image recording part 12. A belt-like hologram recording part 18 recording a hologram image is provided on the upper side part of the perforation 14 of the film base 11. The hologram recording part 18 is formed with the same silver-salt material as that of the image recording part 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic film on which information can be recorded and an apparatus for recording and reproducing information on this photographic film.

[0002]

2. Description of the Related Art Conventionally, a photographic film capable of writing information has been proposed. Such a film is disclosed in, for example, Japanese Patent Application Laid-Open No. 3-504421.
A magnetic recording portion is provided in the perforation portion, and information is written in the magnetic recording portion in the camera, at the developing station, or at the dealer.

[0003]

In such a film, since the silver salt film portion and the magnetic recording portion are provided on the same film base, the manufacturing process thereof is very complicated.

An object of the present invention is to provide a photographic film capable of recording information, which is manufactured by a relatively simple manufacturing process, and an apparatus for recording and reproducing information on the photographic film. .

[0005]

A photographic film of the present invention has a film base, and an image recording section for recording and holding a photographed image in a predetermined area on the film base, and a film base different from the image recording section. A hologram recording section for recording and holding a hologram image containing information is provided in the upper region, and the image recording section and the hologram recording section are formed of the same silver salt material. Further, the information recording / reproducing apparatus of the present invention is an apparatus for recording / reproducing information on / from the photographic film, comprising means for recording a photographed image in an image recording section, a light source for emitting coherent light, and a light source. Means for separating the light flux of the two into two, a liquid crystal panel displaying a pattern according to the information to be recorded,

One of the light fluxes directly illuminates the hologram recording portion as reference light, and the other light flux illuminates the hologram recording portion as object light through the liquid crystal panel to form a hologram image included in information on the hologram recording portion. And a means for receiving the diffracted light from the hologram image and reproducing the recorded information when the reference light is applied to the hologram image.

[0007]

In the present invention, information is recorded as a hologram image in the hologram recording portion on the film base. This information is recorded by dividing the light flux of coherent light into two, irradiating one light flux directly to the hologram recording section, and recording the other light flux through a liquid crystal panel displaying a pattern according to the information. This is done by irradiating the area.
As a result, a hologram image corresponding to the information is formed on the hologram recording section. The reproduction of information is performed by irradiating the hologram image with light equivalent to the light emitted as the reference light during recording, receiving the diffracted light from the hologram image, and examining the intensity distribution thereof.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

In the photographic film 10 of this embodiment, as shown in FIG. 1, an image recording section 12 for recording a photographed image is provided on a film base 11. Image recording unit 12
Perforations 14 and 16 are formed above and below, respectively. A band-shaped hologram recording section 18 for recording a hologram image is provided on the upper side of the perforation 14 of the film base 11. The hologram recording section 18 is made of the same silver salt material as the image recording section 12.

Next, an optical system for recording information in the hologram recording section 18 will be described with reference to FIG. The film 10 is held by two rollers 20 and 22. This optical system has a light source 24 such as a laser that emits coherent light. The light from the light source 24 is made into a parallel light flux by the collimator lens 26, and is split into two light fluxes by the beam splitter 28. The light flux that has passed through the beam splitter 28 is condensed by a condenser lens 30 and is applied to the hologram recording section 18 of the film 10 as reference light. On the other hand, the light beam reflected by the beam splitter 28 is reflected by the reflection mirror 32, and then is irradiated onto the hologram recording unit 18 via the liquid crystal panel 34 as object light.

The liquid crystal panel 34, as shown in FIG.
It has × 4 pixels and displays 12-bit digital information as a grayscale pattern in a matrix format. In the figure, the shaded area indicates a pixel that blocks light and corresponds to digital information "1", and the blank area indicates a pixel that transmits light and corresponds to digital information "0". Therefore, in the example of the figure, the liquid crystal panel 34 is displaying 12-bit data "110010100011".

The light transmitted through the liquid crystal panel 34 interferes with the light condensed by the condenser lens 30, and the liquid crystal panel 34
A hologram image corresponding to the light and shade pattern of is formed on the hologram recording unit 18. The area of the hologram image is the lens 3
0 corresponds to the area of the beam spot formed by 1
It is about 0 μm × 10 μm. The development of the hologram image is performed simultaneously with the development of the captured image recorded in the image recording unit 12.

To reproduce the information recorded as the hologram image, all the pixels of the liquid crystal panel 34 block the light, and only the light condensed by the lens 30 is applied to the hologram image, and the transmission Bragg from there is transmitted. This is performed by detecting the distribution of diffracted light using the two-dimensional photodiode array 36. This two-dimensional photodiode array 36
Is disposed on the back side of the film 10 at a position corresponding to the extension of the optical path when the light from the liquid crystal panel 34 travels to the film 10 during recording. Further, between the two-dimensional photodiode array 36 and the film 10,
Two lenses 38 and 40 arranged at the focal positions of each other are arranged.

As described above, in the present invention, since the holography is used for recording information, the image recording part 12 and the hologram recording part 18 of the film 10 can be formed of the same silver salt material. This provides a photographic film capable of recording information, which is manufactured by a relatively simple process. Further, since a hologram image having a relatively high contrast is formed using a liquid crystal panel with low power consumption, it can be easily mounted on a camera.

[0015]

According to the present invention, since the hologram recording section for recording information is made of the same silver salt material as the image recording section for recording the photographed image, it can be manufactured by a relatively simple manufacturing process. The photographic film that can record information will be provided.

[Brief description of drawings]

FIG. 1 shows a photographic film of an example of the present invention.

FIG. 2 shows a pixel of a liquid crystal panel of the optical system shown in FIG.

FIG. 3 shows an optical system for recording information on the photographic film of FIG. 1 and reproducing the recorded information.

[Explanation of symbols]

11 ... Film base, 12 ... Image recording part, 18 ... Hologram recording part.

Claims (2)

[Claims] 1. A film base, an image recording section for recording and holding a photographed image provided in a predetermined area on the film base, and information provided in an area on the film base different from the image recording section. A photographic film having a hologram recording section for recording and holding a hologram image, wherein the image recording section and the hologram recording section are formed of the same silver salt material. 2. An information recording / reproducing apparatus which records information on the photographic film according to claim 1 and reproduces the recorded information, and means for recording a photographed image in an image recording section and emitting coherent light. A light source, a means for separating the light flux from the light source into two, a liquid crystal panel that displays a pattern according to the information to be recorded, and one light flux irradiates the hologram recording section directly as a reference light, and the other light flux is an object. A means for irradiating the hologram recording section as light through the liquid crystal panel to form a hologram image included in information on the hologram recording section, and a reference light for irradiating the hologram image, receiving the diffracted light from the hologram image and recording it. Information recording / reproducing apparatus having means for reproducing recorded information.