JPS6112265B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to holography for obtaining three-dimensional images, and in particular, the present invention makes it possible to capture images without subjecting the subject to sudden changes in light intensity during recording, thereby keeping the subject's facial expressions extremely natural. In addition to making it possible to record in a state where the laser beam is irradiated in a clear state, it also maintains conditions such as the irradiation position and irradiation angle of the laser beam exactly the same during recording and playback, thereby obtaining a clear 3D image with high resolution. It is.

FIG. 1 is a schematic diagram for explaining an embodiment of a three-dimensional holography production apparatus according to the present invention. In the figure, 1 is a light guide bundle made of optical fibers, etc., and 2 is one or both surfaces of the peripheral part. Many through holes 2 on the surface of
₁ , 2 ₂ ,...2 _o , with through holes 2 ₁ , 2 o.
₂ ,...2 _o include the optical fibers 1 ₁ , of the light guide bundle 1 ,
1 ₂ ,...1 _o are firmly fixed to the frame 2 so as not to move. Reference numeral 3 denotes a photographic plate holder arranged at a predetermined distance from the frame 2, and the photographic plate holder 3 and the frame 2 are supported by supports 4, 4', etc. so that the positional relationship between them does not change. It is constructed in one piece. The photographic plate holder 3 is also provided with a hole 3a for inserting and removing a photographic plate. Prior to photographing, when normal illumination light is introduced to the tip 1a of the light guide 1,
The illumination light propagates through the optical fibers 1 ₁ , 1 ₂ , . _{. .} 1 _o and illuminates the subject 5 through the through holes 2 ₁ , 2 2 , . At this time, if a desired one of the through holes 2 ₁ , 2 ₂ , ... 2 _o of the frame body 2 is closed or an optical filter or the like is provided to illuminate the object 5, the illumination of the object can be controlled arbitrarily. can be adjusted to Thereafter, when photographing, when a laser beam is introduced from the end surface 1a of the light guide bundle 1, the laser beam is irradiated through the unobstructed through hole, and a part of the object illumination light is reflected by the object 5 and becomes the object light. In addition, the other part becomes a reference light and gathers on the photographic plate to form a hologram. By memorizing the blocked through hole, optical filter, etc. at this time by any means, the conditions at the time of shooting, such as the irradiation position and irradiation angle of the laser beam at the time of shooting, can be maintained as they are. During reproduction, if a laser beam is introduced through the end face 1a of the light guide 1, a clear three-dimensional image with high resolution can be obtained.

FIG. 2 is a diagram showing an example of an optical system diagram of the holography according to the present invention. As shown in the figure, a part of the laser beam irradiated from the frame 2 is used as object illumination light L ₁ to illuminate the object 5. The other part is irradiated directly onto the photographic plate 3' as the reference light _L2 , and the object light _L3 ' and the reference light are reflected from the subject 5.
L ₂ forms a hologram on the photographic plate. FIG. 3 is an optical system diagram showing another embodiment of the present invention. According to this embodiment, since the subject 5 and the photographic plate 3' are in the same direction with respect to the frame 2 constituting the light source, It can have the same configuration as a normal camera. FIG. 4 is an optical system diagram showing still another embodiment, and according to this embodiment,
Since the object illumination light _L1 once passes through the photographic plate 3', in this case it is necessary to use a somewhat more powerful laser light than in the embodiments shown in FIGS. 2 and 3.

As is clear from the above description, according to the present invention, the illumination of the subject can be adjusted with a considerable degree of freedom before photographing, and then immediately switched to laser light and photographed. In particular, when the subject is an animal, the subject can be photographed in its natural appearance without sudden changes in light. Further, since the irradiation position, irradiation angle, etc. of the laser beam are kept exactly the same during photographing and reproduction, a clear three-dimensional image with high resolution can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a photographing and reproducing device used in holography according to the present invention, and FIGS.
Each figure is an optical system diagram applied to the photographing and reproducing apparatus shown in FIG. 1. 1... Light guide bundle, 2... Frame (light source), 3...
Photographic plate holder, 4, 4'...Support, 5...
subject.

Claims (1)

[Claims] 1. A frame body in which a large number of light guides are arranged around the periphery, and a photographic plate holder arranged at a predetermined distance from the frame body, and the light guide, the frame body and the photograph The dry plate holder is firmly fixed so that its positional relationship does not change, and during recording, laser light is irradiated from a desired light guide among the light guides, and a part of it is used as a reference light and an object light. a hologram is formed on the photographic plate, and during reproduction, the hologram is reproduced by irradiating a laser beam through a light guide used as a reference light among the desired light guides. Yi.