STEREO PROJECTION WITH INTERFERENCE FILTERS

• US 20100066813A1
• Filed: 11/19/2007
• Published: 03/18/2010
• Est. Priority Date: 11/19/2006
• Status: Abandoned Application

• Current Assignee: INFITEC GmbH
• Original Assignee: INFITEC GmbH
• Inventors: Jorke, Helmut
• Application Number:
  US12/515,342
• Publication Number:
  US 20100066813A1
• Time in Patent Office: Days
• US Class Current: 348/46
• CPC Class Codes: H04N 13/144 for flicker reduction
• CPC Class Codes: H04N 13/324 Colour aspects
• CPC Class Codes: H04N 13/334 using spectral multiplexing
• CPC Class Codes: H04N 13/341 using temporal multiplexing
• CPC Class Codes: H04N 13/363 using image projection screens volumetric display H04N13/388
• CPC Class Codes: H04N 13/398 Synchronisation thereof; Control thereof

Abstract

The invention relates to a stereo projection system and a method for generating an optically perceptible three-dimensional pictorial reproduction. For each of the two perspective partial images (left or right) of the stereo image, regions of the visible spectrum, which are defined differently by colour filters, are masked in such a way that a plurality of only limited spectral intervals is transmitted in the region of the colour perception blue (B), green (G), and red (R). The position of the transmitted intervals is selected differently for the two perspective partial images. The number of transmitted intervals for the two perspective partial images is, according to the invention, selected as lower than 6 (b) either for the image generation or for the image detection by the stereo glasses, and equal to 6 (a). In the event of a reduced number (b), at least one transmitted interval for one of the perspective partial images is selected in transmission in the region of two colour perceptions blue (B), green (G) or red (R), and created by right-left permutation and subsequent combination with an adjacent interval. According to the permutated intervals, the associated image data is analogously permutated. In this way, the cost of the filters, especially interference filters for the stereo projection system or for the method for producing an optically perceptible, three-dimensional pictorial reproduction, is significantly reduced without considerably affecting the reproduction quality. The unpleasant flickering is also reduced.

Claims

1. A process for the generation of an optically three-dimensionally perceivable image replay, in which for each of the two perspective partial pictures (left, respectively right), by means of color filters, different predetermined ranges of the visible spectrum are masked, such that multiple limited spectral bands in the range of the color perception blue (B), green (G) and red (R) are transmitted,

wherein the location of the transmission bands for the two perspective partial pictures is different,

wherein during the image generation and during image reception by means of stereo glasses color filters are utilized for the perspective partial pictures,

wherein the number of transmission bands for the color filters for the image generation, as compared to the color filters for the image reception by means of stereo glasses, is different,

wherein the number of the transmission bands for the two perspective partial pictures (a) are selected to be preferably smaller than 6, wherein at least one transmission band for one of the perspective partial pictures is selected transmitting in the range of two color perceptions blue (B), green (G) or red (R),

wherein the overall number (b) of the transmission bands for the two perspective partial pictures is selected larger than (a) and in particular equal to 6,

wherein the transmission bands of the color filters for the image generation and for the stereo glasses are fundamentally of identical design and others are designed equivalent, in that for the image generation or for the stereo glasses individual transmission bands are interchanged or alternated pair-wise left/right, and by merging with a neighboring band the overall number is reduced, and

wherein the range data associated with the pair-wise right-left interchanged hands is additionally right-left interchanged during image generation.

2. The process for the generation of an optically three-dimensionally perceivable image replay according to claim 1,

wherein for the color filters of the image generation or the image perception the number b of the transmission bands (L11, L12, R11, R12, R13;

L21, L22, L23, R21, R22) for the two perspective partial pictures is selected to be equal to 5, and

wherein one transmission band (L11;

R22) for one of the perspective partial pictures is selected transmitting with a bandwidth of greater than 30 nm in the range of the two color perceptions blue (B) and green (G) or in the range of the two color perceptions green (G) and red (R).

3. The process for the generation of an optically three-dimensionally perceivable image replay according to claim 1, wherein the transmission bands (L12, R11, R12, R13;

L21, L22, L23, R21) are selected with a bandwidth of approximately 30 nm or less than 30 nm in the range of a single color perception blue (B), green (G) or red (R).

4. The process for the generation of an optically three-dimensionally perceivable image replay according to claim 1,

wherein for the color filters of the image generation or the image perception the number (b) of the transmission bands (L31, L32, R31, R32) for the two perspective partial pictures is selected equal to 4, and

wherein one transmission band each (L32;

R31) for one of the perspective partial pictures is selected transmittant with a bandwidth of greater than 30 nm in the range of the two color perceptions blue (B) and green (G) or in the range of the two color perceptions green (G) and red (R) and that one transmission band each (L31;

R32) for one of the perspective partial pictures is located in the range of a single color perception blue (B) or red (R).

5. The process for the generation of an optically three-dimensionally perceivable image replay according to claim 1, wherein at least one of the two outer transmission bands is designed as an open interval.

6. A stereo projection system for the generation of an optically three-dimensionally perceivable image replay with a stereo projector (10) suitable for the projection of two perspective partial pictures (left respectively right) onto a screen, with at least one light source (11), with at least one image generating unit (12) for each perspective partial picture, and with two orthogonal interference filter units (13a, 13b) through which different predetermined ranges of the visible spectrum are blocked out such that multiple limited spectral bands are transmitted in the range of the color perception blue (B), green (G) and red (R) in which the location of the transmission bands is different for the two perspective partial pictures,

wherein the color filters of the stereo projector are designed such that the number (b) of the transmission bands for the two perspective partial pictures is selected smaller than 6 and that at least one transmission band for one of the perspective partial pictures is selected transmitting in the range of two color perception ranges blue (B), green (G) or red (R),

wherein at least one set of stereo glasses is utilized with lenses that are, with respect to the transmission characteristic for the left and the right eye of the viewer, substantially identical or equivalent to the two orthogonal interference filter units and feature at least 6 limited spectral bands which are pair-wise transmitting in the range of the color perception blue (B), green (G) and red (R) in which the location of the transmission bands is different,

wherein the left perspective partial picture is generated with the color image data R1 G1, B1 and the right perspective partial picture is generated with the color image data R2, G2, B2 by means of the image generating unit of the stereo projector, in which R1 and R2 constitute color image data with red color, G1 and G2 color image data with green color and B1 and B2 color image data with blue color,

wherein color image data of one color of the two perspective partial pictures is pair-wise left-right exchanged such that the interchanged right color image data is replayed for the left perspective partial picture by means of the interference filter unit and vice versa, that the interference filter unit of the stereoprojector is so designed, that at least a part of the exchanged color image data in the range of one transmitted interval is transmitted and projected in the range of two color perceptions, and

wherein the stereo projector is designed such that perspective pictures can be projected by means of alternating use of the two interference filter units.

8. The stereo projection system for the generation of an optically three-dimensionally perceivable image replay according to claim 6,

wherein the two orthogonal interference filter units (13a, 13b) of the stereo projector or the stereo glasses are designed such that

the number of the transmission bands (L11, L12, R11, R12, R13;

L21, L22, L23, R21, R22) for the two perspective partial pictures is selected to be equal to 5 and one transmission band (L11;

R22) for one of the perspective partial pictures is selected transmitting with a bandwidth of over 30 nm in the range of the two color perceptions blue (B) and green (G) or in the range of the two color perceptions green (G) and red (R), and

transmission bands (L12, R11, R12, R13;

L21, L22, L23, R21) are selected with a bandwidth of approximately 30 nm or less than 30 nm in the range of a single color perception blue (B), green (G) or red (R).

9. The stereo projection system for the generation of an optically three-dimensionally perceivable image replay according to claim 6,

wherein

the two orthogonal interference filter units (13a, 13b) of the stereo projector or the stereo glasses are designed such that

the number of the transmission bands (L31, L32;

R31, R32) for the two perspective partial pictures is selected equal to be 4,

each one transmission band (L32;

R31) for one of the perspective partial pictures is selected transmitting with a bandwidth of over 30 nm in the range of the two color perceptions blue (B) and green (G) or in the range of the two color perceptions green (G) and red (R), and

each one transmission band (L31, R32) for one of the perspective partial pictures is located in the range of a single color perception blue (B) or red (R).

7. The stereo projection system for the generation of an optically three-dimensionally perceivable image replay with a stereo projector (10) suitable for the projection of two perspective partial pictures (left respectively right) onto a screen with at least one light source (11), with at least one image generating unit (12) for each perspective partial picture and with two orthogonal interference filter units (13a, 13b) through which different predetermined ranges of the visible spectrum are blocked out such that multiple limited spectral bands are transmitted in the range of the color perception blue (B), green (G) and red (R), wherein the location of the transmission bands is different for the two perspective partial pictures, wherein at least one set of stereo glasses is utilized with lenses that are, with respect to the transmission characteristic for the left and the right eye of the viewer, equivalent to the two orthogonal interference filter units,

wherein the number (b) of the transmission bands of the stereo glasses is selected to be smaller than 6, wherein at least one transmission band for one of the perspective partial pictures is selected transmitting in the range of two color perception ranges blue (B), green (G) or red (R),

wherein the stereo projector features interference filter units with transmission characteristics for the left and right perspective partial picture which are equivalent to that of the two lenses of the stereo glasses and feature at least 6 (a) limited spectral bands which are transmitting pair wise in the range of the color perception blue (B), green (G) and red (R), in which the location of these transmission bands is different,

wherein the left perspective partial picture is replayed utilizing the color image data R1, G1, B1 and the right perspective partial picture is replayed utilizing the color image data R2, G2, B2 by means of the image generating unit of the stereo projector in which R1 and R2 constitute color image data with red color, G1 and G2 color image data with green color and B1 and B2 color image data with blue color,

wherein color image data of one color of the two perspective partial pictures is pair wise left-right interchanged such that the interchanged right color image data is replayed for the left perspective partial picture by means of the interference filter unit of the stereo projector and vice versa,

wherein the interference filters for the lenses of the stereo glasses are designed such that at least one part of the interchanged color image data in the range of one transmission band is transmitted in the range of two color perception ranges, and

wherein the stereo projector is designed such that perspective pictures can be projected by means of alternating use of the two interference filter units.