CN217034502U - High light efficiency polarizing device - Google Patents
High light efficiency polarizing device Download PDFInfo
- Publication number
- CN217034502U CN217034502U CN202122925696.7U CN202122925696U CN217034502U CN 217034502 U CN217034502 U CN 217034502U CN 202122925696 U CN202122925696 U CN 202122925696U CN 217034502 U CN217034502 U CN 217034502U
- Authority
- CN
- China
- Prior art keywords
- prism
- light
- splitting
- reflection part
- polarizing device
- 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.)
- Active
Links
Images
Landscapes
- Optical Elements Other Than Lenses (AREA)
Abstract
The utility model discloses a high light efficiency polarizing device, which is used for carrying out three-dimensional projection on projected picture beams and comprises: a lens group and a prism beam splitting structure; the prism light splitting structure comprises a prism light splitting part and a prism reflection part, the prism reflection part is arranged on one side of the prism light splitting part, the prism light splitting part comprises an incidence surface and a prism light splitting film layer arranged inside the prism light splitting part, the incidence surface is used for incidence of a projected picture light beam, and the prism light splitting film layer is used for splitting the incidence projected picture light beam into a transmission light beam with a first polarization state and a reflection light beam with a second polarization state. By adopting the glass prism with larger refractive index and arranging the reflecting structure and the prism light splitting structure together, the incident picture light with large deflection angle can also be emitted at a smaller angle, so that a more compact light path structure becomes a reality, the space occupation of the light path structure in the stereo projection system is greatly reduced, and the prism light splitting efficiency can be obviously improved while supporting a projector with lower transmittance.
Description
Technical Field
The utility model relates to the technical field of stereoscopic projection, in particular to a high-luminous-efficiency polarizing device which supports low projection ratio, high luminous efficiency, low cost and small space occupation.
Background
Light emitted by a light source of an existing projector is natural light, polarization is not displayed, and stereoscopic display needs to be achieved by polarizing the light into linearly polarized light or circularly polarized light, modulating the light by using a Liquid Crystal Variable Retarder (LCVR), and enabling left and right eye images to enter left and right eyes in a time-sharing manner so as to achieve the effect of stereoscopic display. Because the traditional method for generating polarized light is to add a dichroic polarizer directly in front of a projection objective, the dichroic polarizer can absorb electric vector rays parallel to an absorption axis, namely more than 55% of light energy is absorbed by the polarizer, and the display brightness of the screen is greatly reduced.
More than 55% of the emitted light energy can be continuously absorbed by the polaroid, which can cause the temperature of the polaroid to rise, and the performances such as the polarization degree of the polaroid can be reduced, even the polaroid can be damaged. In addition, the polarizer is attached to the surface of the liquid crystal variable phase retarder, which causes liquid crystal molecules in the liquid crystal cell to absorb most of the heat, and the liquid crystal molecules are very temperature sensitive substances, which affects the birefringence coefficient thereof, causes the optical path difference of the polarized o and e lights to change or even fail, and further affects the three-dimensional picture effect of the screen display.
Compared with the polarization beam splitter in the prior art, the polarization prism light splitting structure has the advantages that the transmission light beam and the reflection light beam can have the same polarization state after leaving the polarization prism light splitter, and the transmittance and the reflectivity in a visible wave band are far higher than those of the common polarization beam splitter.
The existing polarizing prism light splitting structure comprises 1 obtuse-angle triangular prism with an obtuse angle, 1 isosceles right-angle prism, 2 identical acute-angle triangular prisms, an upper reflector and a lower reflector, and a lens assembly consisting of a half-concave lens and a convex lens is adopted in the lens structure.
But above-mentioned prism beam split structure whole volume is too big, leads to the production installation cost too high, makes its little throw than the version price too high volume too big, and practical value is low, and the declination is too big when shining the rete simultaneously, reduces prism beam split efficiency, and the light efficiency is very low.
SUMMERY OF THE UTILITY MODEL
The high-light-efficiency polarizing device is provided, and a glass prism with a larger refractive index is adopted, so that the reflecting structure and the prism light splitting structure are integrally formed, even if the incident picture light with a large declination angle can also be emitted at a smaller angle, a more compact light path structure becomes a reality, the space occupation of the light path structure in a stereoscopic projection system is greatly reduced, and the prism light splitting efficiency can be obviously improved while a projector with a lower transmission ratio is supported.
A high light efficiency polarizing device for stereoscopically projecting a projected picture beam, comprising:
a lens group;
a prism beam splitting structure;
the prism light splitting structure comprises a prism light splitting part and a prism reflection part, the prism reflection part is arranged on one side of the prism light splitting part, the prism light splitting part comprises an incidence surface and a prism light splitting film layer arranged inside the prism light splitting part, the incidence surface is used for incidence of the projection picture light beams, the prism light splitting film layer is used for decomposing the incidence projection picture light beams into transmission light beams with a first polarization state and reflection light beams with a second polarization state, and the refractive index n of the prism light splitting structure is larger than 1.6.
In a first possible implementation manner of the high light efficiency polarizing device according to the present invention, the prism reflection part includes a first prism reflection part and a second prism reflection part, and the first prism reflection part and the second prism reflection part are disposed on two sides of the prism splitting part.
In a second possible embodiment of the high luminous efficiency polarizing device according to the present invention, the prism reflection part and the prism splitting part are spliced together, and the prism reflection part is a triangular structure.
In a third possible embodiment of the high luminous efficiency polarizing device according to the present invention, the prism reflection part is provided separately from the prism spectroscopic part, and the prism reflection part is a triangular structure.
In a fourth possible embodiment of the high luminous efficiency polarizing device according to the present invention, the prism beam splitter and the prism reflector are integrally formed, and the prism reflector is a triangular structure.
In a fifth possible implementation manner, with reference to the high light efficiency polarizing device of the present invention, the prism splitting film layer encloses an isosceles right angle structure, the isosceles right angle structure is axisymmetric with respect to the prism splitting part, and the prism splitting film layer is a 45-degree prism splitting film layer.
In a sixth possible implementation manner, with reference to the high light efficiency polarizing device of the present invention, the prism beam splitter includes a triangular prism and a beam splitter prism, the first prism reflection part, and the second prism reflection part are special-shaped structural bodies, the first prism reflection part and the second prism reflection part have the same prism structure and are symmetrically spliced on two sides of the beam splitter prism, and the beam splitting film layer is disposed on the splicing surfaces of the first prism reflection part and the beam splitter prism, and the second prism reflection part and the beam splitter prism.
In a seventh possible implementation manner of the high light efficiency polarizing device according to the present invention, the lens assembly is a focusing lens assembly, and includes a semi-concave lens and a convex lens, and the semi-concave lens and the convex lens are used for adjusting a size range of the transmitted light beam.
In an eighth possible implementation manner, with reference to the high light efficiency polarizing device of the present invention, the polarizing device further includes a linear polarizer, where the linear polarizer includes a first linear polarizer, a second linear polarizer, and a third linear polarizer, and the first linear polarizer, the second linear polarizer, and the third linear polarizer are respectively disposed corresponding to the outgoing light paths of the first prism reflection part, the prism splitting part, and the second prism reflection part.
In a ninth possible implementation manner, with reference to the high light efficiency polarizing device of the present invention, the polarizing device further includes a polarization modulator, where the polarization modulator includes a first polarization modulator, a second polarization modulator, and a third polarization modulator, and the first polarization modulator, the second polarization modulator, and the third polarization modulator are respectively disposed corresponding to the first linear polarizer, the second linear polarizer, and the third linear polarizer.
According to the high-light-efficiency polarizing device, the glass prism with a larger refractive index is adopted, and the reflecting structure and the prism light splitting structure are integrally formed, so that even if the incident picture light with a large deflection angle is emitted at a smaller angle, a more compact light path structure can be realized, the space occupation of the light path structure in a three-dimensional projection system is greatly reduced, and the prism light splitting efficiency can be obviously improved while a projector with a lower transmittance ratio is supported.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a perspective view of a high light efficiency polarizer according to the present invention;
FIG. 2 is a front view of a layout of a high light efficiency polarizer according to the present invention;
FIG. 3 is a schematic diagram of a dual optical path of a high light efficiency polarizer according to the present invention;
the names of the parts designated by the numbers in the drawings are as follows: 100-polarizing device, 110-first prism reflection part, 120-second prism reflection part, 130-prism beam splitting part, 140-prism beam splitting film layer, 200-lens group, 300-linear polarizer, 310-first linear polarizer, 320-second linear polarizer 3, 330-third linear polarizer, 400-polarization modulator, 410-first polarization modulator, 420-second polarization modulator, 430-third polarization modulator.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings in the utility model, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of them. Other embodiments, which can be derived by one of ordinary skill in the art from the embodiments given herein without any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The high-light-efficiency polarizing device 100 is provided aiming at the problems that the whole volume of the existing prism light splitting structure is too large, the production and installation cost is too high, the price of a small projection ratio plate is too high, the volume is too large, the practical value is low, the deflection angle is too large when a film layer is irradiated, the light splitting efficiency of the prism is reduced, and the light efficiency is influenced.
Fig. 1 is a perspective view of a high luminous efficiency polarizing device 100, and fig. 1 is a perspective view of the high luminous efficiency polarizing device 100 according to the present invention, which is used for performing a stereoscopic projection on a projected picture beam.
Dual light path embodiments
Referring to fig. 3, fig. 3 is a schematic diagram of a dual optical path of a high light efficiency polarizing device according to the present invention, in an embodiment of the dual optical path, the high light efficiency polarizing device 100 includes: the prism light splitting structure comprises a lens group 200 and a prism light splitting structure, wherein the prism light splitting structure comprises a prism light splitting part 130 and a prism reflection part, the prism reflection part is arranged on one side of the prism light splitting part 130, the prism light splitting part 130 comprises an incidence surface and a prism light splitting film layer 140 arranged in the prism light splitting part, the incidence surface is used for incidence and projection of picture light beams, the prism light splitting film layer 140 is used for splitting the incidence and projection of the picture light beams into transmission light beams with a first polarization state and reflection light beams with a second polarization state, and the refractive index n of the prism light splitting structure is larger than 1.6.
The prism spectroscopic part 130 and the prism reflection part are integrally formed as a trapezoidal structure, and the prism reflection part is a triangular structure symmetrically disposed on both sides of the trapezoidal structure.
The prism reflection unit is a triangular structure and is joined to the prism spectroscopic unit 130. The prism reflection unit is provided separately from the prism spectroscopic unit 130, and is a triangular structure.
The prism spectroscopic part 130 is integrally formed with the prism reflection part, which is a triangular structure.
Three optical path embodiments
The high light efficiency polarizing device 100 in the three light path embodiment comprises: the lens set 200 and the prism beam splitting structure, the prism beam splitting structure includes a prism beam splitting part 130 and a prism reflection part, the prism reflection part includes a first prism reflection part 110 and a second prism reflection part 120, the prism beam splitting part 130 is arranged close to the first prism reflection part 110 and the second prism reflection part 120, the prism beam splitting part 130 includes an incident surface and a prism beam splitting film 140 arranged inside the prism beam splitting part, the incident surface is used for incident and projected picture beams, and the prism beam splitting film 140 is used for splitting the incident and projected picture beams into transmission beams with a first polarization state and first and second reflection beams with a second polarization state.
The prism/prism beam splitter 130, the first prism reflector 110, and the second prism reflector 120 are preferably made of LASF35 glass, and have a refractive index n of 1.62, and the incident projection screen light beam is split into first polarized light and second polarized light after passing through the prism/beam splitting film 140, wherein the first polarized light is reflected by the first prism reflector 110, totally reflected by an air medium, and projected by the first linear polarizer 300. The second polarized light passes through the prism beam-splitting film layer 140 and then continues to be transmitted through the lens set 200 and the second linear polarizer 300, respectively.
LASF35 glass, use but not be limited to at present, the biggest acceptance angle of this material glass is 18 degrees, and the biggest declination angle is 8.8 degrees, has high refracting index and extremely low Abbe's coefficient, and big declination gets into and can be with a less angle outgoing after this structure for the declination structure volume is littleer, to the little transmittance device of big angle incidence, LASF35 glass can also improve the effect of incident angle and show improvement prism spectral efficiency, improves the light efficiency.
The prism reflection part includes a first prism reflection part and a second prism reflection part, which are disposed at both sides of the prism beam-splitting part 130.
The first prism reflection part 110 and the second prism reflection part 120 are arranged on both sides of the prism/beam splitting part in a spliced manner, and the first prism reflection part and the second prism reflection part are triangular structures symmetrically arranged on both sides of the trapezoidal structure.
The first prism reflection unit 110 and the second prism reflection unit 120 are separately provided on both sides of the prism-splitting unit.
The prism light splitting part, the first prism reflection part and the second prism reflection part are integrally formed into a trapezoidal structure, and the first prism reflection part and the second prism reflection part are triangular structures symmetrically arranged on two sides of the trapezoidal structure.
Through adopting the great prism glass of refracting index and pressing close to setting, separation design or integrated into one piece setting with reflection configuration and prism beam splitting structure, even big declination incident picture light also can be with less angle outgoing for more compact light path structure becomes reality, greatly reduced the volume of the light path structure among the stereoscopic projection system.
The prism beam splitting film 140 forms an isosceles right angle structure, the isosceles right angle structure is axisymmetric with respect to the center line of the prism beam splitting part 130, and the prism beam splitting film 140 is a 45-degree prism beam splitting film 140.
The prism beam-splitting part 130 comprises a triangular prism and a beam-splitting prism, the beam-splitting prism and the first prism reflection part 110 and the second prism reflection part 120 are special-shaped structural bodies, the prism structures of the first prism reflection part 110 and the second prism reflection part 120 are the same and symmetrically spliced on two sides of the beam-splitting prism, and the 45-degree prism beam-splitting film layer 140 is arranged on the splicing surfaces of the first prism reflection part 110 and the beam-splitting prism and the second prism reflection part 120 and the beam-splitting prism.
The lens group 200 includes a semi-concave lens and a convex lens for adjusting a size range of a transmitted beam. The lens assembly 200 is configured to adjust a size range of the transmitted second polarized light beam.
Referring to fig. 2, fig. 2 is a front view of the layout of the high luminous efficiency polarization device 100 according to the present invention, the polarization device 100 further includes a linear polarizer 300, the linear polarizer 300 includes a first linear polarizer 310, a second linear polarizer 320 and a third linear polarizer 330, and the first linear polarizer 310, the second linear polarizer 320 and the third linear polarizer 330 are respectively disposed corresponding to the emergent light paths of the first prism reflection part 110, the prism-splitting part 130 and the second prism reflection part 120.
The polarization device 100 further includes a polarization modulator 400, the polarization modulator includes a first polarization modulator 410, a second polarization modulator 420, and a third polarization modulator 430, and the first polarization modulator 410, the second polarization modulator 420, and the third polarization modulator 430 are respectively disposed corresponding to the first linear polarizer 310, the second linear polarizer 320, and the third linear polarizer 330.
The first, second and third linear polarizers 310, 320 and 330 are located before the first, second and third polarization modulators 410, 420 and 430, and are used for filtering the transmitted light beam to make it completely linearly polarized. Three polarization modulators for modulating the transmitted light beam, the upper reflected light beam and the lower reflected light beam into left circularly polarized light and right circularly polarized light according to the frame sequence
According to the high-light-efficiency polarizing device, the prism glass with a larger refractive index is adopted, the reflecting structure and the prism light splitting structure are arranged in close proximity, even if the incident picture light with a large deflection angle is emitted at a smaller angle, a more compact light path structure is realized, the space occupation of the light path structure in a stereoscopic projection system is greatly reduced, the prism light splitting efficiency can be obviously improved, and the light efficiency is improved.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A high luminous efficiency polarizing device for stereoscopically projecting a projected picture beam, comprising:
a lens group;
a prism beam splitting structure;
the prism beam splitting structure comprises a prism beam splitting part, a first prism reflection part and a second prism reflection part, wherein the first prism reflection part and the second prism reflection part are arranged on two sides of the prism beam splitting part, the prism beam splitting part comprises an incident surface and a prism beam splitting film layer arranged inside the prism beam splitting part, the incident surface is used for incidence of the projection picture light beam, the prism beam splitting film layer is used for splitting the incident projection picture light beam into a transmission light beam with a first polarization state and a first reflection light beam or a second reflection light beam with a second polarization state, and the prism refractive index n of the prism beam splitting structure is larger than 1.6.
2. The high luminous efficiency polarizing device according to claim 1, wherein the first prism reflection part and the second prism reflection part are spliced and arranged on both sides of the prism beam splitting part, and the first prism reflection part and the second prism reflection part are triangular structures symmetrically arranged on both sides of the trapezoidal structure.
3. The high luminous efficiency polarizing device of claim 1, wherein the first and second prism reflection parts are separately disposed on two sides of the prism beam splitting part.
4. The high luminous efficiency polarizing device according to claim 1, wherein the prism beam splitter is integrally formed as a trapezoidal structure with a first prism reflector and a second prism reflector, and the first prism reflector and the second prism reflector are triangular structures symmetrically disposed on both sides of the trapezoidal structure.
5. The high luminous efficiency polarizing device according to any one of claims 1 to 4, wherein the prism splitting film layer encloses an isosceles right angle structure, the isosceles right angle structure is axisymmetric with respect to the prism splitting part, and the prism splitting film layer is a 45 degree prism splitting film layer.
6. The high luminous efficiency polarizing device according to claim 2, wherein the prism beam splitter comprises a triangular prism and a beam splitter prism, the beam splitter prism and the first and second prism reflection parts are shaped structures, the first and second prism reflection parts have the same prism structure and are symmetrically spliced on two sides of the beam splitter prism, and the prism beam splitting film layer is disposed on the splicing surfaces of the first prism reflection part and the beam splitter prism and the second prism reflection part and the beam splitter prism.
7. The high light efficiency polarizer according to claim 1, wherein the lens group is a focusing lens group comprising a semi-concave lens and a convex lens for adjusting the size range of the transmitted light beam.
8. The high light efficiency polarizing device according to claim 2, further comprising linear polarizers, wherein the linear polarizers comprise a first linear polarizer, a second linear polarizer and a third linear polarizer, and the first linear polarizer, the second linear polarizer and the third linear polarizer are respectively disposed corresponding to the emergent light paths of the first prism reflection part, the prism-splitting part and the second prism reflection part.
9. The high light efficiency polarizing device according to claim 8, further comprising a polarization modulator, wherein the polarization modulator comprises a first polarization modulator, a second polarization modulator and a third polarization modulator, and the first polarization modulator, the second polarization modulator and the third polarization modulator are disposed corresponding to the first linear polarizer, the second linear polarizer and the third linear polarizer, respectively.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021202059166 | 2021-01-25 | ||
| CN202120205916 | 2021-01-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217034502U true CN217034502U (en) | 2022-07-22 |
Family
ID=82440144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122925696.7U Active CN217034502U (en) | 2021-01-25 | 2021-11-25 | High light efficiency polarizing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217034502U (en) |
-
2021
- 2021-11-25 CN CN202122925696.7U patent/CN217034502U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2437130C2 (en) | Lens, forming image under control of substrate | |
| CN1322359C (en) | Image display element, and image display device | |
| RU2669544C2 (en) | Device of optical polarization for the stereoscopic image projector | |
| JP2913864B2 (en) | Polarization conversion optical system, polarization beam splitter, and liquid crystal display device | |
| CN109283774B (en) | Projection lens and projection system | |
| CN100576061C (en) | Lighting device and projector | |
| JP2001027739A (en) | Virtual image observation optical device | |
| JPH07225379A (en) | Projection type liquid crystal display device | |
| KR970703681A (en) | HIGH RESOLUTION SUBTRACTIVE COLOR PROJECTION SYSTEM | |
| EP1512039A1 (en) | Polarized light source system with dual optical paths | |
| JPH10186302A (en) | Display device and polarized light source device | |
| CN107065181B (en) | Optical system of virtual reality equipment | |
| JP3080693B2 (en) | Polarizing beam splitter array | |
| CN219302777U (en) | Apparatus for manufacturing cholesteric liquid crystal device and near-eye display device | |
| CN112540502A (en) | Projection display equipment and projection optical machine thereof | |
| JP2830534B2 (en) | Polarization conversion element | |
| CN103792782A (en) | Optical system for stereographic projection | |
| CN203732876U (en) | Optical system used for stereoscopic projection | |
| CN217034502U (en) | High light efficiency polarizing device | |
| CN108333776B (en) | Near-eye display optical module and near-eye display system | |
| JPH04141603A (en) | Polarizing light source device and projection type liquid crystal display device using this device | |
| CN117111303A (en) | Projection display system and head-mounted display device | |
| CN101539669B (en) | Reflective liquid crystal projecting apparatus | |
| CN214202042U (en) | High light efficiency does not have colored ribbon device of polarizing | |
| CN219245925U (en) | Double-display double-mirror projector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |