WO2011003234A1

WO2011003234A1 - Optical stereo projection device, system and method

Info

Publication number: WO2011003234A1
Application number: PCT/CN2009/072682
Authority: WO
Inventors: 夏登海; 李炜
Original assignee: 深圳市掌网立体时代视讯技术有限公司
Priority date: 2009-07-08
Filing date: 2009-07-08
Publication date: 2011-01-13

Abstract

An optical stereo projection device (100) comprises a beam splitting prism (109), two mirrors (104,108), a first group of optical lenses (102,103), a second group of optical lenses (106,107), a first polarizing filter (101), and a second polarizing filter (105). The beam splitting prism (109) divides a stereo image that comes from a projection (220) lens and is minified in the horizontal direction into a left and a right image. The two mirrors (104,108) reflect the left and the right image divided by the beam splitting prism (109) respectively. The first (102,103) and the second (106,107) group of optical lenses magnify the left and the right image reflected by the two mirrors (104,108) in the horizontal direction, and the magnification times is equal to the minification times. The first (101) and the second (105) polarizing filter make the light that comes respectively from the first (102,103) and the second (106,107) group of optical lenses polarize orthogonally, and project the images onto a screen to form two overlapping images The invention also provides an optical stereo projection system (200) comprising the optical stereo projection device (100) and a single projector (220). The invention also provides a stereo projection method.

Description

Instruction manual

Optical stereoscopic projection device, system and method

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[1] The present invention relates to the field of stereoscopic image projection, and more particularly to an optical stereoscopic projection device, system and stereoscopic projection method for stereoscopic image projection.

[2] With the advancement of technology and social development, the demand for viewing stereoscopic movies and images is increasing, which also promotes the development of stereoscopic film projection technology and stereoscopic projection equipment. At present, the production of stereoscopic movie programs generally requires two The photography rack is mounted on a special pan/tilt head with adjustable angle and spacing, and the human eye is synchronized at a certain angle. After the three-dimensional movie is shown, the two projectors are placed in a certain way, horizontally or vertically, and the two images are almost completely overlapped and projected in the same screen. A polarizer must be added in front of the lens of each projector, one is a lateral polarizer and the other is a longitudinal polarizer (or a diagonal cross), so that two polarization directions appear on the screen are 90 degrees positive. The image of the image. The audience should also wear polarized glasses when watching movies. The polarization of the left and right lenses must be the same as the polarizer on the projector. Thus, the left and right eyes can filter out the different polarization directions, and only the polarized light image of the corresponding polarization direction is seen, that is, the left eye can only see the left projection screen, and the right eye can only see the right projection screen. . These images are combined by the brain to produce stereoscopic vision.

[3] As can be seen from the above-mentioned process of screening stereoscopic movies, two projectors must be used to display stereoscopic movies or images. To achieve a good simultaneous projection of the two projectors, it is necessary to use other supporting equipment for control. The poor synchronization performance will affect the effect of the stereoscopic projection. Therefore, the existing stereoscopic projection technology and method are not only costly, but also Synchronization and reliability are also not easy to improve.

[4] The technical solution to which the present invention solves the technical problems is: Constructing an optical stereoscopic projection device, a system, and a stereoscopic projection method, the optical stereoscopic projection device comprising:

[5] A dichroic prism for dividing a horizontally compressed side-by-side stereo image from a projector lens into two left and right images;

[6] a first mirror and a second mirror for respectively separating the left and right images after separating the beam splitting prism Line reflection; The left and right screens are overlapped by adjusting the angle of the mirror.

[7] a first optical lens group and a second optical lens group, configured to receive two left and right images respectively reflected by the first mirror and the second mirror and perform amplification of an equivalent compression ratio in a horizontal direction;

[8] a first polarizing filter and a second polarizing filter, respectively, for performing polarization processing on light rays corresponding to the first optical lens group and the second optical lens group to form a 90-degree orthogonal and projecting an image On the screen, form two overlapping images.

[9] Specifically, the lateral distance between the first optical lens group and the second optical lens group is related to the effective aperture of the film projector, and the larger the aperture is, the larger the distance.

[10] Specifically, the angle adjustment of the first mirror and the second mirror includes respectively adjusting and synchronizing adjustment.

[11] Specifically, the first polarizing filter and the second polarizing filter are polarizing filters.

[12] Specifically, the film compression ratio is 2: 1, and the lens magnification ratio is 1:2.

[13] In order to better achieve the object of the invention, an optical stereoscopic projection system is provided, comprising a single projector and a lens, characterized in that it further comprises an optical stereoscopic projection device, the optical stereoscopic projection device being connected to the office via an adapter ring In the single projector and the lens, the optical stereoscopic projection device comprises:

[14] A beam splitting prism for dividing a horizontally compressed side-by-side stereo image from a projector lens into two left and right images;

[15] The first mirror and the second mirror are configured to respectively reflect the left and right images separated by the beam splitting prism; and adjust the reflection angle to overlap the left and right screens.

[16] a first optical lens group and a second optical lens group, configured to receive two left and right images respectively reflected by the first mirror and the second mirror and perform amplification of an equivalent compression ratio in a horizontal direction;

[17] a first polarizing filter and a second polarizing filter, respectively, for performing polarized light processing on light rays corresponding to the first optical lens group and the second optical lens group to form a 90-degree orthogonal and projecting an image On the screen, form two overlapping images.

[18] Specifically, the angle adjustment of the first mirror and the second mirror includes respectively adjusting and synchronizing adjustment.

[19] Specifically, the first polarizing filter and the second polarizing filter are polarizing filters.

[20] Specifically, the film compression ratio is 2: 1, and the lens magnification ratio is 1:2.

[21] In order to better achieve the object of the invention, a stereoscopic projection method is provided, which comprises the following steps: [22] Sl, dividing a horizontally compressed side-by-side stereo image from a single projector lens into two left and right images through a splitting prism;

[23] S2, two mirrors adjustable by an angle respectively reflect the left and right images separated by the beam splitting prism;

[24] S3. The two optical lens groups respectively receive the left and right images reflected by the two mirrors and perform an equal compression ratio amplification in the horizontal direction;

[25] S4, 釆 Two polarizing filters are used to polarize light from the two optical lens groups to form a 90-degree orthogonal and project the image onto the screen to form two overlapping images.

[26] The invention provides an optical stereoscopic projection device, a system and a stereoscopic projection method, which realizes that a stereoscopic movie can be displayed by using a single projector, thereby reducing the cost and greatly reducing the threshold for the popularization of the stereoscopic movie, as long as With this device plugged in, other conditions can be changed without changing, and stereoscopic playback can be performed. Similarly, because stereoscopic movies and images are played in a single machine, the adjustment and synchronization of the stereoscopic projection device is greatly simplified.

, no additional mechanical or electronic equipment control is required, so its synchronization performance may be optimal.

difficult

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention will now be further elucidated with reference to the drawings and specific embodiments.

[29] FIG. 1 is a schematic structural view of an optical stereoscopic projection device according to a preferred embodiment of the present invention, wherein the optical stereoscopic projection device 100 includes a beam splitting prism 109 for receiving images from a single projector. The side-by-side stereoscopic image compressed from the horizontal direction of the projector lens is divided into two left and right images; the projected stereoscopic image is a video or picture in a left-right or right-left juxtaposition format, and is compressed by 2:1 in the horizontal direction;

[30] The first mirror 104 and the second mirror 108 are configured to respectively reflect the left and right images separated by the beam splitting prism 109, and superimpose the left and right screens by adjusting the reflection angle.

[31] a first optical lens group (102, 103) and a second optical lens group (106, 107) for receiving left and right images respectively reflected by the first mirror 104 and the second mirror 108 and in a horizontal direction Enlarging the equivalent compression ratio is performed by 1: 2 scaling; the first optical lens group (102, 103) and the The lateral distance between the two optical lens groups (106, 107) is related to the effective aperture of the film projector, and the larger the aperture is, the larger the distance;

[32] a first polarizing filter 101 and a second polarizing filter 105 for respectively performing light rays from the first optical lens group (102, 103) and the second optical lens group (106, 107) The polarized light processing forms a 90 degree orthogonal and projects the image onto the screen, forming two images that overlap. The first mirror 104, the first optical lens group (102, 103) and the first polarizing filter 101 constitute a left lens; the second mirror 108, the second optical lens group (106, 107) and the second The polarizing filter 105 constitutes a right lens; in order to accommodate the projector operating in different environments, the projection distance is very close, so the angles of the first mirror 104 and the second mirror 108 can be fine-tuned. In order to adapt to different screening venues, the first mirror 104 and the second mirror 108 can be respectively adjusted in angle, or the angle adjustment can be performed simultaneously, so that the left and right screens are coincident on the screen. The two optical lens groups are different from the conventional lens lens. When the image passes through the lens group, the image is doubled in the horizontal direction with respect to the original image aspect ratio, and the vertical direction is unchanged, that is, the image maintains the original relative height, and the width The magnification is doubled, and the left and right images are zoomed in horizontal direction 1: 2 without distortion, so that the aspect ratio of the left and right images displayed on the screen is restored to the aspect ratio of the original scene, so that the scene or the character is displayed. Without being out of proportion, the first polarizing filter 101 and the second polarizing filter 105 placed in front of the two optical lens groups are orthogonal to each other by 90 degrees. People need to wear the corresponding polarized glasses when watching movies, and let the viewer see the left image only when the viewer is looking at the picture. The right eye only sees the right image, so that a clear stereoscopic image can be seen.

[33] FIG. 2 is a schematic structural view of an optical stereoscopic projection system according to a preferred embodiment of the present invention, wherein the optical stereoscopic projection system 200 includes a single projector and a lens 220 and an optical stereoscopic projection device 210. The optical stereoscopic projection device 210 is coupled to the single projector and the lens 220 via an adapter ring. The optical stereoscopic projection device 210 further includes:

[34] A beam splitting prism 219 receives images from a single projector for dividing a horizontally compressed stereo image from the projector lens into two left and right images; the projected stereo image is a left or right or left and right side format video Or picture, and compressed 2:1 in the horizontal direction;

[35] The first mirror 214 and the second mirror 218 are configured to respectively reflect the left and right images separated by the beam splitting prism 219;

[36] a first optical lens group (212, 213) and a second optical lens group (216, 217) for receiving the first The two left and right images reflected by the mirror 214 and the second mirror 218 are respectively enlarged in an equivalent compression ratio in the horizontal direction, that is, 1: 2 scale-up; the first optical lens group (212, 213) and the second The lateral distance between the optical lens groups (216, 217) is linearly proportional to the effective aperture of the film projector, and the larger the aperture, the greater the distance;

[37] The first polarizing filter 211 and the second polarizing filter 215 are respectively configured to perform light from the first optical lens group (212, 213) and the second optical lens group (216, 217) The polarized light processing forms a 90 degree orthogonal and projects the image onto the screen, forming two images that overlap. The first mirror 214, the first optical lens group (212, 213) and the first polarizing filter 211 constitute a left lens; the second mirror 21 8 , the second optical lens group (216, 217) and the second The polarizing filter 215 constitutes a right lens;

[38] The single projector and lens 220 can be a projector, a digital cinema projector, or a side-by-side (2:1 compressed) film film projector.

[39] Currently, in the video format, the usual video aspect ratio is 16:9 or 4:3. According to this ratio, if the side-by-side stereo video is not horizontally compressed, its aspect ratio is bound to reach 32:9. , 8: 3. Regardless of the aspect ratio, it is difficult to adapt to the coding and decoding capabilities of current digital products, and even film is difficult to be compatible. And whether film or image sensor is used to obtain such an image, the effective use area of the film or image sensor is very small. For a given film or image sensor, the image resolution obtained is much smaller than that of the film or the sensor itself. . Therefore, a stereoscopic video format is assumed here: The left and right images are compressed by 2:1 in the horizontal direction, that is, assuming that the original scene is 16:9, then the left picture is 8:9. The right image is also 8:9, and when combined, it becomes a 16:9 side-by-side picture, which is the best solution for the current coding technology, decoding technology, or the use of the effective photosensitive area of the image sensor. The program source in the above stereoscopic video format is projected using a single projector and a lens 220, and is coupled to the optical stereoscopic projection device 21 by an adapter ring. When the stereoscopic image is projected to the dichroic prism, it is divided into left and right. Images, so that the left and right images are separated. The separated image is reflected by two mirrors to the two optical lens groups for horizontal scaling of the corresponding proportions. In order to accommodate the projector operating in different environments, the projection distance is very close, so the angles of the first mirror 214 and the second mirror 218 will be fine-tuned. In order to adapt to different screening venues, the first mirror 214 and the second mirror 218 can respectively adjust the angles, or can perform angle adjustments synchronously, so that the left and right screens are coincident on the screen. The two The optical lens group is different from the conventional lens lens. When the image passes through the lens group, the image is doubled in the horizontal direction with respect to the original image aspect ratio, and the vertical direction is unchanged, that is, the image maintains the original relative height, and the width is relatively doubled. , the left and right two screens are horizontally 1 : 2 without distortion, so that the aspect ratio of the left and right screens displayed on the screen is restored to the aspect ratio of the original scene, so that the scene or the character will not be out of proportion in the display. The first polarizing filter 211 and the second polarizing filter 215 placed in front of the two optical lens groups are orthogonal to each other by 90 degrees. People need to wear the corresponding polarized glasses when watching movies, and let the viewer see the left image only when the viewer is looking at the picture. The right eye only sees the right image, so that a clear stereoscopic image can be seen.

[40] FIG. 3 is a flowchart of a stereoscopic projection method according to a preferred embodiment of the present invention. The method S300 includes the following steps:

[41] In step S302, the stereoscopic image compressed from the horizontal direction of the single projector lens is divided into two left and right images by a dichroic prism; the stereoscopic image displayed is a left or right or left and right side format video or picture, and When the horizontal direction is 2:1 compressed, when the stereoscopic image is projected to the dichroic prism, it is divided into two left and right images, so that the left and right parallel images are separated. The single projector can be a projector, a digital cinema projector, or Parallel (including horizontal 2:1 compressed) film film projector;

[42] In step S304, the two mirrors that are adjustable by the angle respectively reflect the left and right images separated by the beam splitting prism; for the projector to work in different environments, the projection distance is far and near, so The angles of the two mirrors can be fine-tuned, and the two mirrors can respectively adjust the angles, or the angles can be adjusted simultaneously, so that the left and right images are coincident on the screen;

[43] In step S306, the two optical lens groups respectively receive the left and right images reflected by the two mirrors and perform the amplification of the equivalent compression ratio in the horizontal direction; the two optical lens groups and the conventional lens Different lenses, when the image passes through the lens group, the image is doubled in the horizontal direction relative to the original image, and the vertical direction is unchanged, that is, the image maintains the original relative height, and the width is relatively doubled. Horizontal direction 1: 2 magnification without distortion, so that the aspect ratio of the left and right pictures displayed on the screen is restored to the aspect ratio of the original scene, so that the scene or the person does not have a proportional imbalance in display; the two optics The lateral distance between the lens groups is related to the effective aperture of the film projector, and the larger the aperture is, the larger the distance; [44] In step S308, the two polarizing filters are respectively used to polarize light from the two optical lens groups to form a 90-degree orthogonal image and project the image onto the screen to form two overlapping images. image. People need to wear the corresponding polarized glasses when watching movies, and let the viewer see the left image only when the viewer is looking at the picture. The right eye only sees the right image, so that a clear stereoscopic image can be seen.

[45] In summary, the optical stereoscopic projection device, the optical stereoscopic projection device system and the stereoscopic projection method disclosed in the present invention have the following advantages and particularities compared with the conventional stereoscopic projection technology: 1. Firstly, juxtaposition using horizontal compression The three-dimensional film source is the most economical choice in terms of current technical capabilities and resource utilization. 2. Horizontally magnifying the horizontally compressed image, reducing the original proportion of the image, although compared to two The projectors show the full-width left and right images at the same time, which has some loss in definition, but reduces the investment on the projection equipment. The single projector can display stereoscopic movies, which greatly reduces the threshold for the popularity of stereoscopic projection. In front of the projector lens, the device can be externally mounted without any changes, and the stereoscopic projection can be performed. 3. Since the single projector is used to play stereoscopic movies and images, the adjustment and synchronization of the stereoscopic projection device is greatly simplified, and The synchronization performance is inherently the most excellent; 4, the device can form a red and blue stereoscopic movie by changing the polarizing filter into a red and blue complementary color filter; 5. The stereoscopic device does not need to be played during the process of playing the stereoscopic movie. Mechanical movement, without any mechanical wear, improves reliability compared to previous rotary stereoscopic playback devices for film stereoscopic movie playback. 6. The video playback device does not require complex devices such as computers, and does not require special software. It can play stereoscopic movies using ordinary high-definition video playback devices.

The above description and description are merely exemplary embodiments of the present invention, and are not intended to limit the invention, and any modifications, equivalents, and improvements made within the spirit and scope of the present invention should be included. It is within the scope of the invention.

Claims

Claim

[1] 1. An optical stereoscopic projection device, comprising:

a dichroic prism (109) for dividing the horizontally compressed stereoscopic stereo image from the projector lens into two left and right images;

a first mirror (104) and a second mirror (108) for respectively reflecting the left and right images separated by the beam splitting prism (109);

a first optical lens group (102, 103) and a second optical lens group (106, 107) for receiving left and right images respectively reflected by the first mirror (104) and the second mirror (108) and horizontally Amplification of the equivalent compression ratio in the direction;

a first polarizing filter (101) and a second polarizing filter (105) for respectively illuminating light from the first optical lens group ( ₁₀₂ , 103) and the second optical lens group (106, 107) Perform polarized light processing to form a 90 degree orthogonal and project an image onto the screen to form two overlapping images

[2] 2. The optical stereoscopic projection device according to claim 1, wherein: a lateral distance between the first optical lens group (102, 103) and the second optical lens group (106, 107) The effective caliber of the film projector is related.

[3] 3. The optical stereoscopic projection device according to claim 1, wherein: the angle adjustment of the first mirror (104) and the second mirror (108) comprises respectively adjusting and synchronizing.

[4] 4. The first polarizing filter (101) and the second polarizing filter (105) are polarizing filters.

[5] 5,

The optical stereoscopic projection device according to claim 1, wherein the film compression ratio is 2: 1, and the lens magnification ratio is 1:2.

[6] 6. An optical stereoscopic projection system comprising a single projector and a lens (220), characterized in that

Also included is an optical stereoscopic projection device (210) coupled to the single projector and lens (220) via an adapter ring, the optical stereoscopic projection device (210) comprising:

a dichroic prism (219) for juxtaposed compression from the horizontal direction of the projector lens The stereoscopic image is divided into two images;

a first mirror (214) and a second mirror (218) for respectively reflecting the left and right images separated by the beam splitting prism (219);

a first optical lens group (212, 213) and a second optical lens group (216, 217) for receiving left and right images respectively reflected by the first mirror (214) and the second mirror (218) and horizontally Amplification of the equivalent compression ratio in the direction;

a first polarizing filter (211) and a second polarizing filter (215) for respectively illuminating light from the first optical lens group (212, 213) and the second optical lens group (216, 217) Perform polarized light processing to form a 90 degree orthogonal and project an image onto the screen to form two overlapping images

[7] 7. The optical stereoscopic projection system according to claim 6, wherein: the angle adjustment of the first mirror (214) and the second mirror (218) comprises separately adjusting and synchronizing adjustments.

[8] 8. The optical stereoscopic projection system according to claim 6, wherein the first polarizing filter (211) and the second polarizing filter (215) are polarizing filters.

[9] 9. The optical stereoscopic projection system according to claim 6, wherein: the film compression ratio is 2:1, and the lens magnification ratio is 1:2.

[10] 10. A stereoscopic projection method, comprising the steps of:

S1, dividing a horizontally-compressed parallel stereoscopic image from a single projector lens into two left and right images through a dichroic prism;

52. The two mirrors that are adjustable by the angle respectively reflect the left and right images separated by the beam splitting prism;

53. The two optical lens groups respectively receive the left and right images reflected by the two mirrors and perform the amplification of the equivalent compression ratio in the horizontal direction;

54. Using two polarizing filters, the light from the two optical lens groups is separately polarized to form a 90 degree orthogonal and the image is projected onto the screen to form two overlapping images.