JPH11242120A - Element hologram panel and reproduced image generator using the panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-density element hologram panel, where the number of reproduced (display) dot images per area of the panel is increased and blur of reproduced (display) dot images is reduced, and a reproduced image generator using this panel. SOLUTION: The element hologram panel is an aggregation of element holograms, and the size of each element hologram is X 12 and Y 13 in orthogonal directions, and they are so arranged that element holograms have overlap areas Ox 14 and Oy 15. Thus, the number of display dot images can be increased, and even parts overlapping with adjacent element holograms are irradiated with laser light to generate different dot images there. and a three- dimensional image is reproduced by dot images generated from the whole of element holograms or selected element holograms, and a moving picture can be displayed by a control method.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an element hologram panel in which small holograms (element holograms) forming unit elements are densely packed, and more particularly, to display of a three-dimensional object for displaying a three-dimensional object. Used for equipment,
The present invention relates to an element hologram panel for displaying a three-dimensional object or the like by a plurality of element holograms constituting the element hologram panel, and a method for recording an element hologram used for producing the panel.

[0002]

2. Description of the Related Art An example of the prior art relating to this kind of element hologram panel is disclosed in Japanese Patent Laid-Open No. 9-222513.
The disclosure of Japanese Patent Application Laid-Open Publication No. H10-260,1992. In the configuration of the element hologram panel shown in this conventional example, as shown in FIG. 5, a small hologram (element hologram) 51 is used to obtain a three-dimensional display by a plurality of point images 52 formed in a three-dimensional space. The holograms used to generate one of the point images 52 are created by dispersing and arranging the element holograms over a wide area of the panel to reduce the amount of data and generate a point image with a wide viewing area. That is, the reproduction is performed. Then, in a portion where data of a certain point image is not recorded, data of another point image is recorded, thereby recording many point images as elementary holograms on one panel.

As described above, since a hologram capable of reproducing a large number of point images is recorded on the element hologram panel, a necessary element hologram is selected from the element hologram panel, and light is applied to the selected element hologram. Thereby, the display of the point image can be controlled, and the display of a three-dimensional image composed of a large number of point images becomes possible. As a method of controlling the display of the point image, if the light irradiation is changed over time, a three-dimensional moving image can be displayed.

FIG. 6 is a schematic diagram for explaining a method of displaying a three-dimensional image by scanning a laser beam. In this method, first, three-dimensional image data 67 to be displayed is prepared on an element hologram of the element hologram panel in order to generate a reproduced image from the element hologram panel, and the modulator 63 and the XY deflection are controlled by a control computer 66 based on the data. The controller 64 is controlled to irradiate a laser beam 65 having a controlled light intensity on the element hologram at a position corresponding to a point image forming a three-dimensional image on the element hologram screen panel 69 by raster scanning. In this case, if the scanning speed of the laser beam 65 is sufficiently high, a three-dimensional moving image can be displayed.

Further, as an alternative to the laser light irradiation optical system shown in FIG. 6, a light source for generating a light beam having coherence, an optical system for expanding the beam diameter of the light beam emitted from the light source, and an optical system A liquid crystal spatial light modulator whose transmittance is controllable is arranged in the optical path of the expanded beam, and corresponds to a point image forming a three-dimensional image on an element hologram panel by light emitted from the irradiation optical system. By selectively irradiating the element hologram, a three-dimensional moving image can be displayed.

[0006]

In the conventional element hologram panel used as described above, the number of point images depends on the number of element holograms. However, the size of the elementary hologram which forms a unit had to be reduced.
However, reducing the size of the element hologram causes a problem that the blur of the display point image becomes serious. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, and has a high density element that increases the number of reproduced (display) point images per panel area and reduces the blur of the reproduced (display) point images. It is an object of the present invention to provide a hologram panel and a reproduced image generation device using the element hologram panel.

[0007]

According to a first aspect of the present invention, a size corresponding to an irradiation area of light to be modulated and controlled is used as a unit of a size of an element, and individual image data relating to an image to be reproduced is obtained. In an element hologram panel formed by collecting a plurality of element holograms created based on the element hologram, a part of an element hologram area forming the element hologram panel and a part of an adjacent element hologram area are formed between the two. According to the present invention, a part of each element hologram is arranged so as to overlap (share) with a part of an adjacent element hologram, and a region of the element hologram is substantially expanded. An element hologram panel having a large number of display point images and having a continuous point image without blurring can be formed.

[0008] A second aspect of the present invention is characterized in that, in the first aspect of the present invention, each of the element holograms has a fixed size, and each has an area shared by the two. .

According to a third aspect of the present invention, in the first or second aspect of the present invention, the element hologram includes a hologram created based on image data for generating a plurality of pixels in one element hologram. According to the present invention, in the element hologram panel arranged so that a part of each element hologram overlaps a part of an adjacent element hologram, when displaying a point image, a part of the element hologram is Even if it overlaps with the adjacent element holograms, the images reconstructed from the overlapping part are each 1
The element hologram panel can be displayed point by point, the display point image looks continuous without blurring, and an element hologram panel having many display point images can be formed.

According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, an element hologram created corresponding to a three-dimensional image to be reproduced on the element hologram is used. It is a characteristic.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, there is provided a beam scanning means for modulated and controlled light, and the beam scanning means selects an element hologram in an element hologram panel. According to the present invention, by performing irradiation, a reproduced image is generated, and according to the present invention, an element hologram panel in which a part of each element hologram is arranged to overlap a part of an adjacent element hologram, When displaying a point image by optical scanning,
By irradiating all the element holograms for displaying the point image, that is, the laser light also on the position overlapping with the adjacent element hologram, and displaying the point image, the display point image can be seen continuously without blurring and many displays. An element hologram panel having a point image can be formed.

According to a sixth aspect of the present invention, in any one of the first to fourth aspects of the present invention, there is provided a controlled light source light, and a liquid crystal spatial light modulator for modulating the light source light. According to the present invention, a reconstructed image is generated by selecting and irradiating element holograms in an element hologram panel by a container, and according to the present invention, a part of each element hologram overlaps a part of an adjacent element hologram. When displaying a point image by the liquid crystal spatial light modulator, the element hologram panel disposed in the element hologram panel illuminates all the element holograms that display the point image, that is, irradiates light also to a position overlapping with the adjacent element hologram, By displaying the image, the displayed point image looks continuous without blurring,
In addition, an element hologram panel having many display point images can be formed.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing an embodiment of an element hologram panel according to the present invention. First, the configuration of the element hologram panel of the present embodiment will be described. 2 shows a part of an element hologram panel according to the invention.
Here, the size of one element is X in each of the orthogonal directions.
(Shown by 12 in FIG. 1), size Y (shown by 13 in FIG. 1)
, And each element hologram is arranged so as to overlap and overlap Ox (indicated by 14 in FIG. 1) and Oy (indicated by 15 in FIG. 1).

Next, the principle of the operation of displaying a point image in three dimensions by the element hologram panel will be described. FIG.
FIG. 2 is a conceptual diagram for explaining a case where three different modes are used to display a point image by an element hologram. FIG. 2A shows a case where one point image 21 is displayed on the hologram 22. In the hologram 22, wavefront data for generating the point image 21 at the time of reproduction is written on the entire surface of the hologram. Here, since the data is recorded with considerable redundancy, in order to reduce the amount of data, as shown in FIG. The reproduced point image 23 can be displayed. However, in the case of FIG. 2B, the range (viewing area) in which the point image 23 can be seen becomes narrow.

Therefore, as shown in FIG. 2C, if the small holograms 26 (constituted in units of element holograms) are dispersed over a wide range, the amount of data can be reduced and the point of view of a wide viewing area can be reduced. The image 25 can be reproduced. Then, data of another point image is recorded in a portion where data for generating the point image 25 is not recorded. In this manner, element holograms for generating a large number of point images at the time of reproduction are combined and recorded on one panel, and the necessary element holograms corresponding to the point images to be reproduced are selected, and laser light is used. Irradiates a three-dimensional image composed of many point images. Further, if the irradiation of the laser beam to the element hologram selected to generate the point image is changed with time, a three-dimensional moving image can be displayed.

Here, the pitch of the element holograms for displaying the same point image so that the display image of the same point image appears continuously will be described with reference to FIG. In FIG. 3, the display point image is determined by determining the pitch 32 of the element holograms 33 so that the light 34 from the element holograms 33 formed on the element hologram panel 30 displaying the same point image 31 always enters the pupil 35 at the same time. Becomes continuous.

Here, the pitch P (32) of the element hologram in which the point image 31 shown in FIG. 3 can be seen continuously is 3 mm, the size X of the element hologram 33 is 100 μm, and Y is 100
When the element holograms are arranged without being overlapped with each other, the number included in the area of the square having the pitch P as one side is given by the following equation (1).

[0018]

(Equation 1)

Thus, element holograms for 900 display point images can be arranged. However, in order to further increase the number of display point images, the element holograms must be reduced. However, when the element hologram is made smaller, the display point image becomes more blurred. This indicates the relationship between the spread of the diffracted light that generates the point image and the size of the hologram. This is clear from equation (2) (diffraction approximation).

[0020]

(Equation 2)

Therefore, the pitch P (3) of the element holograms required to arrange the same point image continuously visible is required.
2) and the size X, Y of each element hologram as it is, that is, the element hologram pitch P (32) is 3 mm,
Element hologram size 100 μm, Y 100 μm
m, the overlap Ox of each element hologram is 20 μm, and Oy is 20 μm. The number of point images (element holograms) included in the effective area of the element hologram panel is given by the following equation (3).

[0022]

(Equation 3)

Thus, 1369 element holograms with display point increments can be arranged. By doing so, the number of display point images can be increased.

Here, when a three-dimensional image is displayed by scanning a laser beam using the method of FIG. 6 shown as a conventional example, this element hologram panel constituted as an aggregate of overlapping element holograms All the element holograms that display the corresponding point image present above, that is, the points overlapping with the adjacent element holograms are also irradiated with the laser light to display the point image.

Also in the case of using the liquid crystal spatial light modulator, all the element holograms for displaying the corresponding point images, that is, the points overlapping the adjacent element holograms are irradiated with light to display the point images. An embodiment in which this liquid crystal spatial light modulator is used will be described. FIG.
FIG. 2 is a schematic diagram for explaining the relationship between element holograms and liquid crystal pixels when element holograms having overlaps are formed into panels as in FIG. FIG. 4 shows a part 41 of the element hologram panel. Here, one element hologram having an overlapping portion has a size 42 in the X direction.
And a size 43 in the Y direction. In the liquid crystal pixel 44 as the liquid crystal spatial light modulator, a plurality of liquid crystal pixels including the overlapping portion are arranged as shown in FIG. The whole including the part and the dedicated part is selected by the plurality of liquid crystal pixels 44.

[0026]

According to the first and second aspects of the present invention, a display point image is blurred by disposing a part of each element hologram and a part of an adjacent element hologram so as to be shared (overlapping) with each other. It is possible to increase the displayed point image without any problem. Claim 2 presents effective conditions for implementation.

Effect corresponding to claim 3: Claim 1 or 2
In addition to the effect corresponding to the above, by arranging a plurality of coordinates or pixels on one element hologram, a part of each element hologram is arranged to share a part of an adjacent element hologram with both. When a point image is displayed on the element hologram panel, even if a part of the element hologram overlaps with the adjacent element hologram, the images reproduced from the overlapping part can be individually displayed one by one. It is possible to increase the displayed point image without blurring the image.

An effect corresponding to claim 4: 3 as a reproduced image
Corresponding to a two-dimensional image increases the effectiveness of the first to third effects.

According to a fifth aspect of the present invention, a part of each element hologram is shared with a part of an adjacent element hologram by the reconstructed image generating apparatus using the element hologram panel of the first to fourth aspects. When a point image is displayed by optical scanning on the element hologram panel arranged in, all the element holograms that display the point image, that is, the point image is displayed by irradiating the laser beam also to a position overlapping with the adjacent element hologram. It is possible to increase the display point image without blurring the display point image.

According to a sixth aspect of the present invention, a part of each element hologram shares a part of an adjacent element hologram with both by the reconstructed image generating apparatus using the element hologram panel of the first to fourth aspects. When a point image is displayed on the element hologram panel disposed in the liquid crystal spatial light modulator, all of the element holograms that display the point image, that is, light is radiated to the point overlapping with the adjacent element hologram. Can be displayed, and the display point image can be increased without blurring the display point image.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an embodiment of an element hologram panel according to the present invention.

FIG. 2 is a schematic diagram for explaining a case in which the principle of displaying a point image by an element hologram is in three different forms.

FIG. 3 is a schematic diagram for explaining a pitch of element holograms so that a display image of the same dotted line can be viewed continuously.

FIG. 4 is a schematic diagram for explaining a relationship between a panelized element hologram and liquid crystal pixels according to the present invention.

FIG. 5 is a schematic diagram showing a configuration of a conventional element hologram panel used for a three-dimensional object display device and explaining its operation.

FIG. 6 is a schematic diagram showing a configuration of a conventional three-dimensional image display device using an element hologram panel.

[Explanation of symbols]

11: Part of element hologram panel, 12, 42: Size X of one element hologram, 13, 43 ... Size Y of one element hologram, 14: Overlap Ox of element holograms, 15: Overlap of element holograms Oy 21,2
3, 25, 31, 52: point image, 22: hologram, 2
4, 41: Part of hologram, 26, 33, 51: Element hologram, 30: Element hologram panel, 32: Pitch of element hologram displaying the same point image, 34: Light from element hologram, 35: Pupil, 44 ... Liquid crystal pixels, 61 ...
Laser oscillator, 62, 65 laser light, 63 modulator
64 XY deflector, 66 control computer, 67 3
Dimensional image data, 68 ... three-dimensional image, 69 ... screen (element hologram) panel.

Claims (6)

[Claims] 1. A method according to claim 1, wherein a plurality of element holograms created based on individual image data relating to an image to be reproduced are used as a unit of an element size. An element hologram panel, wherein a part of an element hologram area forming the element hologram panel and a part of an adjacent element hologram area are shared between the two. 2. The element hologram panel according to claim 1, wherein each of the element holograms has a fixed size, and each has an area shared between the two. 3. The element hologram panel according to claim 1, wherein the element hologram includes a hologram created based on image data for generating a plurality of pixels in one element hologram. Element hologram panel. 4. The element hologram panel according to claim 1, wherein an element hologram created corresponding to a three-dimensional image to be reproduced on the element hologram is used. Element hologram panel. 5. An element hologram panel according to claim 1, further comprising: a beam scanning unit for modulating and controlling light, wherein the beam scanning unit selects and selects an element hologram in the element hologram panel. A reproduced image generating apparatus using an element hologram panel, wherein a reproduced image is generated by performing irradiation. 6. A liquid crystal spatial light modulator, comprising: the element hologram panel according to claim 1; a light source light to be controlled; and a liquid crystal spatial light modulator that modulates the light source light. A reproduced image generating apparatus using an element hologram panel, wherein a reproduced image is generated by selecting and irradiating an element hologram on the element hologram panel.