CN111258167A - Projection stereoscopic display device based on double-layer double-refraction cylindrical lens - Google Patents

Projection stereoscopic display device based on double-layer double-refraction cylindrical lens Download PDF

Info

Publication number
CN111258167A
CN111258167A CN202010310073.6A CN202010310073A CN111258167A CN 111258167 A CN111258167 A CN 111258167A CN 202010310073 A CN202010310073 A CN 202010310073A CN 111258167 A CN111258167 A CN 111258167A
Authority
CN
China
Prior art keywords
double
cylindrical lens
birefringent
curtain
projector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010310073.6A
Other languages
Chinese (zh)
Inventor
吕国皎
赵百川
郑骊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chengdu Technological University CDTU
Chengdu Univeristy of Technology
Original Assignee
Chengdu Technological University CDTU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chengdu Technological University CDTU filed Critical Chengdu Technological University CDTU
Priority to CN202010310073.6A priority Critical patent/CN111258167A/en
Publication of CN111258167A publication Critical patent/CN111258167A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B35/00—Stereoscopic photography
    • G03B35/18—Stereoscopic photography by simultaneous viewing
    • G03B35/20—Stereoscopic photography by simultaneous viewing using two or more projectors
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B35/00—Stereoscopic photography
    • G03B35/18—Stereoscopic photography by simultaneous viewing
    • G03B35/24—Stereoscopic photography by simultaneous viewing using apertured or refractive resolving means on screens or between screen and eye
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B35/00—Stereoscopic photography
    • G03B35/18—Stereoscopic photography by simultaneous viewing
    • G03B35/26—Stereoscopic photography by simultaneous viewing using polarised or coloured light separating different viewpoint images

Abstract

The invention provides a projection stereoscopic display device based on double-layer double-refraction cylindrical lenses. The projection three-dimensional display device based on the double-layer double-refraction cylindrical lens is composed of a dense projector array and a double-layer double-refraction cylindrical lens curtain. The dense projector array is composed of a plurality of projectors, and light rays of images projected by the projectors are linearly polarized light; the double-layer birefringent cylindrical lens curtain is composed of a first birefringent cylindrical lens, a second birefringent cylindrical lens, an 1/4 wave plate and a curtain. The dense projector array can project parallax images to the double-layer double-refraction cylindrical lens curtain, and the double-layer double-refraction cylindrical lens curtain can project the parallax images to different spatial directions so as to realize three-dimensional display. The invention can set a plurality of projectors with smaller space in a smaller space range to project images and form viewpoint arrangement with larger space.

Description

Projection stereoscopic display device based on double-layer double-refraction cylindrical lens
Technical Field
The present invention relates to display technology, and more particularly, to stereoscopic display technology.
Background
The stereoscopic display technology is a display technology that can realize real reproduction of a stereoscopic scene, and can provide different parallax images to human eyes, respectively, thereby enabling a person to generate stereoscopic vision. The conventional stereoscopic projection apparatus can perform stereoscopic projection display by a single or a plurality of projectors. Generally, a single projector can realize a stereoscopic display function through a birefringent grating, but because the number of pixels provided by the single projector is limited, the resolution of a stereoscopic image is low; the multiple projectors can realize the stereoscopic display function by the retro-reflection principle, but the viewpoint position and the projector position should be kept consistent, so the size of the projection system is large. Therefore, the invention provides a projection stereoscopic display device based on double-layer birefringent cylindrical lenses, which has smaller volume and higher resolution compared with the traditional stereoscopic projection display device.
Disclosure of Invention
The invention provides a projection stereoscopic display device based on double-layer double-refraction cylindrical lenses. Fig. 1 is a schematic structural diagram of the projection stereoscopic display device based on the double-layer birefringent cylindrical lens. The projection three-dimensional display device based on the double-layer double-refraction cylindrical lens is composed of a dense projector array and a double-layer double-refraction cylindrical lens curtain. The dense projector array can project parallax images to the double-layer double-refraction cylindrical lens curtain, and the double-layer double-refraction cylindrical lens curtain can project the parallax images to different spatial directions so as to realize three-dimensional display.
Referring to fig. 1, the dense projector array is composed of a plurality of projectors, and the light projected by the projectors is linearly polarized light.
Referring to fig. 2, the dual-layer birefringent cylindrical lens curtain is composed of a first birefringent cylindrical lens, a second birefringent cylindrical lens, 1/4 wave plates and a curtain. The first birefringent cylindrical lens is composed of a birefringent material and a fixed refractive index material, the birefringent material has a refractive index n1 for linearly polarized light projected by the projector, has a refractive index n2 for linearly polarized light orthogonal to the polarization direction of the light projected by the projector, and the fixed refractive index material has a refractive index n2 for light in all polarization directions, so that the first birefringent cylindrical lens has a cylindrical lens grating light splitting effect on the light projected by the projector and has no refraction effect on the linearly polarized light orthogonal to the polarization direction of the light projected by the projector. The second birefringent cylindrical lens is composed of a birefringent material and a fixed refractive index material, the birefringent material has a refractive index n3 for linearly polarized light projected by the projector, has a refractive index n4 for linearly polarized light orthogonal to the polarization direction of the light projected by the projector, and the fixed refractive index material has a refractive index n3 for light in all polarization directions, so that the second birefringent cylindrical lens has no refraction effect on the light projected by the projector and has a cylindrical lens grating light splitting effect on the linearly polarized light orthogonal to the polarization direction of the light projected by the projector. 1/4 the wave plate is placed in front of the curtain, the angle between the polarization direction of the polarized light and the optical axis of the wave plate is 45 degrees, the light projected by the projector is changed into circular polarized light after passing through 1/4 wave plate.
Further, referring to fig. 3, fig. 3 is a diagram illustrating an image projection process according to the present invention. In the projection process of the image, the light rays are projected to the curtain through the first birefringent cylindrical lens and the 1/4 wave plate in sequence. In the process, the second double-refraction cylindrical lens has no refraction effect on the projection light of the projector, so that the light transmission is not influenced. The light passes through 1/4 wave plate to form circularly polarized light.
Further, referring to fig. 4, fig. 4 is a process of displaying an image according to the present invention. The projected light is reflected after reaching the curtain, and the reflected light is projected to each viewpoint through the 1/4 wave plate and the second birefringent cylindrical lens in sequence. In the process, the circularly polarized light reflected by the curtain forms linearly polarized light after passing through an 1/4 wave plate, the polarization direction of the linearly polarized light is orthogonal to the polarization direction of the light projected by the projector, and the light can be projected by using the second double-folding cylindrical lens. In the process, the first double-folded column lens does not have a refraction effect on the reflected light, so that the light transmission is not influenced.
Further, referring to fig. 2, fig. 3 and fig. 4, since the first birefringent cylindrical lens and the second birefringent cylindrical lens may have different spatial positions, pitches and focal length parameters, the position of the viewpoint formed by the light returning does not coincide with the position of the projector. Therefore, the invention can set a plurality of projectors with smaller space for image projection in a smaller space range and form viewpoint arrangement with larger space. Compared with a single projector to form a three-dimensional display device, the projector has more number and higher resolution; compared with a retro-reflective stereoscopic display device formed by a plurality of projectors, the dense projector array can have a smaller size because the projector position and the viewpoint position are not overlapped any more.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic diagram of a double-layer birefringent lenticular lens curtain of the present invention.
FIG. 3 is a schematic diagram of the projection light path of the present invention.
Fig. 4 is a schematic diagram of a display light path according to the present invention.
Icon: 010-a projection stereoscopic display device based on double-layer double-refraction cylindrical lens; 100-double-layer birefringent cylindrical lens curtain; 200-a dense projector array; 101-a first birefringent cylindrical lens; 102-a second birefringent cylindrical lens; 103-1/4 wave plates; 104-curtain.
It should be understood that the above-described figures are merely schematic and are not drawn to scale.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that the terms "first", "second", and the like are used for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Examples
Fig. 1 is a schematic structural diagram of a projection stereoscopic display device 010 based on a double-layer birefringent cylindrical lens according to this embodiment. The projection stereoscopic display device based on the double-layer double-refraction cylindrical lens is composed of a dense projector array 200 and a double-layer double-refraction cylindrical lens curtain 100. The dense projector array 200 may project the parallax image to the double-layered birefringent lenticular lens curtain 100, and the double-layered birefringent lenticular lens curtain 100 may project the parallax image to different spatial directions to realize stereoscopic display.
Referring to fig. 1, the dense projector array 200 is composed of a plurality of projectors, and the light projected by the projectors is linearly polarized light.
Referring to fig. 2, the double-layer birefringent lenticular sheet 100 is composed of a first birefringent lenticular lens 101, a second birefringent lenticular lens 102, 1/4 wave plate 103 and a sheet 104.
The first birefringent cylindrical lens 101 is composed of a birefringent material having a refractive index n1 with respect to linearly polarized light projected by the projector, a refractive index n2 with respect to linearly polarized light orthogonal to the polarization direction of the light projected by the projector, and a fixed refractive index material having a refractive index n2 with respect to all the polarized light rays, and thus has a cylindrical lens grating light splitting effect with respect to the light projected by the projector, and has no refraction effect with respect to the linearly polarized light orthogonal to the polarization direction of the light projected by the projector.
The second birefringent cylindrical lens 102 is made of a birefringent material having a refractive index n3 for linearly polarized light projected by the projector, a refractive index n4 for linearly polarized light orthogonal to the polarization direction of the light projected by the projector, and a fixed refractive index material having a refractive index n3 for light in all polarization directions, and thus has no refraction effect on the light projected by the projector and forms a cylindrical lens grating splitting effect on the linearly polarized light orthogonal to the polarization direction of the light projected by the projector.
Since the common liquid crystal molecules have two optical axes, the first birefringent cylindrical lens 101 and the second birefringent cylindrical lens 102 are formed by curing a liquid crystal material on a cylindrical lens plastic substrate to prepare a birefringent cylindrical lens. To achieve different refractive indices, the director directions of the liquid crystal molecules are different.
1/4 wave plate 103 is placed in front of the curtain, the angle between the polarization direction of the polarized light and the optical axis of the wave plate is 45 degrees, the light projected by the projector is changed into circular polarized light after passing through 1/4 wave plate 103.
Further, referring to fig. 3, fig. 3 is a diagram illustrating an image projection process according to the present invention. Each projector in the dense projector array 200 has a different spatial position, and each projector independently projects a parallax image. During the projection process of the image, each projector light ray is projected to the curtain 104 through the first birefringent cylindrical lens 101, 1/4 wave plate 103 in sequence. In this process, the second birefringent cylindrical lens 102 has no refraction effect on the light projected by the projector, so that the light propagation is not affected. Due to the light splitting function of the first birefringent cylindrical lens 101, the light rays projected by each projector reach different positions on the curtain, and the light rays form circularly polarized light after passing through the 1/4 wave plate 103.
Further, referring to fig. 4, fig. 4 is a process of displaying an image according to the present invention. The projected light reaches the curtain 104 and then is reflected, and the reflected light is projected to each viewpoint through the 1/4 wave plate 103 and the second birefringent cylindrical lens 102 in sequence. In the process, the circularly polarized light reflected by the curtain 104 passes through the 1/4 wave plate 103 to form linearly polarized light, the polarization direction of the linearly polarized light is orthogonal to the polarization direction of the light projected by the projector, and the light can be projected by the second birefringent cylindrical lens 102. Because different projectors project light at different positions on the curtain 104, the positions of the viewpoints formed by the reflected light are different. In this process, the first bi-fold rod lens 101 does not refract the reflected light, and therefore does not affect the light propagation.
Finally, the four projectors from the left to the right of the dense projector array 200 can project the parallax images provided by the projectors to four viewpoints from the left to the right in space. At four viewpoints, the human eye can respectively see four parallax images.
Referring to fig. 2, 3 and 4, since the first birefringent cylindrical lens 101 and the second birefringent cylindrical lens 102 have different spatial positions, pitches and focal length parameters, according to the triangle-like principle, the second birefringent cylindrical lens 102 has a larger pitch and a smaller focal length relative to the first birefringent cylindrical lens 101, and the distance from the first birefringent cylindrical lens to the grating curtain 104 is smaller, so that the viewpoint formed after the light returns has a larger distance relative to each projector. Therefore, the invention can set a plurality of projectors with smaller space for image projection in a smaller space range and form viewpoint arrangement with larger space. Compared with a single projector to form a three-dimensional display device, the projector has more number and higher resolution; compared with a retro-reflective stereoscopic display device formed by a plurality of projectors, the dense projector array can have a smaller size because the projector position and the viewpoint position are not overlapped any more.

Claims (2)

1. A projection stereo display device based on double-layer double-refraction cylindrical lens is characterized in that: the projection three-dimensional display device based on the double-layer double-refraction cylindrical lens is composed of a dense projector array and a double-layer double-refraction cylindrical lens curtain; the dense projector array is composed of a plurality of projectors, and light rays of images projected by the projectors are linearly polarized light; the double-layer double-refraction cylindrical lens curtain consists of a first double-refraction cylindrical lens, a second double-refraction cylindrical lens, an 1/4 wave plate and a curtain; the first birefringent cylindrical lens is composed of a birefringent material and a fixed refractive index material, the birefringent material has a refractive index n1 for linearly polarized light projected by the projector, has a refractive index n2 for linearly polarized light orthogonal to the polarization direction of the light projected by the projector, and the fixed refractive index material has a refractive index n2 for light in all polarization directions; the second birefringent cylindrical lens is composed of a birefringent material and a fixed refractive index material, the birefringent material has a refractive index n3 for linearly polarized light projected by the projector, has a refractive index n4 for linearly polarized light orthogonal to the polarization direction of the light projected by the projector, and the fixed refractive index material has a refractive index n3 for light in all polarization directions; 1/4 the wave plate is placed in front of the curtain, the angle between the polarization direction of the polarized light and the optical axis of the wave plate is 45 degrees; the curtain is placed at the end and used for reflecting light; the dense projector array can project parallax images to the double-layer double-refraction cylindrical lens curtain, and the double-layer double-refraction cylindrical lens curtain can project the parallax images to different spatial directions so as to realize three-dimensional display.
2. The projection stereoscopic display apparatus based on the double-layer birefringent cylindrical lens of claim 1, wherein: the positions of the first birefringent cylindrical lens and the second birefringent cylindrical lens can be interchanged.
CN202010310073.6A 2020-04-20 2020-04-20 Projection stereoscopic display device based on double-layer double-refraction cylindrical lens Pending CN111258167A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010310073.6A CN111258167A (en) 2020-04-20 2020-04-20 Projection stereoscopic display device based on double-layer double-refraction cylindrical lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010310073.6A CN111258167A (en) 2020-04-20 2020-04-20 Projection stereoscopic display device based on double-layer double-refraction cylindrical lens

Publications (1)

Publication Number Publication Date
CN111258167A true CN111258167A (en) 2020-06-09

Family

ID=70944724

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010310073.6A Pending CN111258167A (en) 2020-04-20 2020-04-20 Projection stereoscopic display device based on double-layer double-refraction cylindrical lens

Country Status (1)

Country Link
CN (1) CN111258167A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116027567A (en) * 2023-03-31 2023-04-28 成都工业学院 Rear projection stereoscopic display device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116027567A (en) * 2023-03-31 2023-04-28 成都工业学院 Rear projection stereoscopic display device
CN116027567B (en) * 2023-03-31 2023-09-26 成都工业学院 Rear projection stereoscopic display device

Similar Documents

Publication Publication Date Title
CN107306507B (en) Display device
KR100910393B1 (en) The real image display device with wide viewing angle
US20050168815A1 (en) Stereoscopic image displaying apparatus
US9632406B2 (en) Three-dimension light field construction apparatus
TWI608254B (en) Image display device
CN107065181B (en) Optical system of virtual reality equipment
JP2011095743A (en) Screen system and method of forming three-dimensional display
JP2011203731A (en) System and method for generating aerial three-dimensional image
TW201518773A (en) Autostereoscopic projection device and display apparatus comprising thereof
CN113917701B (en) Projection light field stereoscopic display device
CN110058420A (en) A kind of reflex reflection stereo projection display apparatus
CN111505890A (en) 2D/3D compatible front projection display device
CN110286495B (en) Retroreflective stereoscopic display device based on light source array
CN211577658U (en) Projection stereoscopic display device based on double-layer double-refraction cylindrical lens
CN111258167A (en) Projection stereoscopic display device based on double-layer double-refraction cylindrical lens
CN111694163A (en) 2/3D compatible multi-visual-area stereoscopic display device
CN111458963B (en) Front projection type 2D/3D mixed projection display device
JP6624513B2 (en) Three-dimensional image display device and three-dimensional image display method
CN110989190A (en) Low-crosstalk stereoscopic projection display device
CN114815010B (en) Lens array for 3D suspension imaging and device thereof
CN115145097B (en) Two-piece type 3D projection system and imaging method thereof
CN103235479A (en) Three-dimensional (3D) camera lens and 3D camera system
CN212229352U (en) 2/3D compatible multi-visual-area stereoscopic display device
CN104516188A (en) Stereoscopic projection device
CN116859616A (en) Periodic light field stereoscopic display device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination