CN207424510U - A kind of RTIR optical elements group and its optical projection system - Google Patents
A kind of RTIR optical elements group and its optical projection system Download PDFInfo
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- CN207424510U CN207424510U CN201721659480.8U CN201721659480U CN207424510U CN 207424510 U CN207424510 U CN 207424510U CN 201721659480 U CN201721659480 U CN 201721659480U CN 207424510 U CN207424510 U CN 207424510U
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
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- 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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
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Abstract
The utility model embodiment discloses a kind of RTIR optical elements group and its optical projection system, and the RTIR optical elements group includes：First optical element, the second optical element and the 3rd optical element, the 3rd optical element are arranged between first optical element and the second optical element, and the illuminating bundle for first optical element to be emitted is transmitted through second optical element.RTIR optical elements group and its optical projection system described in the utility model embodiment, can reduce the size of DLP projector, meanwhile, it is capable to correct projection aberration, improve projection performance.
Description
Technical field
The utility model embodiment is related to digital projection display technology field, more particularly to a kind of RTIR optical elements
Group and its optical projection system.
Background technology
With the development of semiconductor technology, portable electronic product becomes more diverse so that the demand of minitype projection machine is got over
Come it is bigger, it is at present, relatively conventional for digital light processing (Digital Light Processing, DLP) projector.
Existing DLP projector generally use illuminating prism is to digital micro-mirror chip (Digital Micro mirror
Device, DMD) lighting source compensate, formed telecentric beam path, to match the required incident ray of dmd chip and
Reflection light.And the projected light beam of currently used RTIR prisms outgoing is vertical with illuminating bundle so that using the RTIR prisms
Optical projection system composition DLP projector volume it is more huge, it is not readily portable.
Then, a kind of RTIR optical elements group is inventors herein proposed, enables to the projected light beam and illuminating bundle of outgoing
Parallel or coincidence so that the optical projection system of the application RTIR optical elements group is of a straight line type arrangement, reduces DLP projector
Size meanwhile, it is capable to correct projection aberration, improves projection performance.
Utility model content
The utility model embodiment is mainly solving the technical problems that provide a kind of RTIR optical elements group and its projection
System, can reduce the size of DLP projector, meanwhile, it is capable to correct projection aberration, improve projection performance.
In order to solve the above technical problems, the technical solution that the utility model embodiment uses is：It provides a kind of
RTIR optical element groups, applied to optical projection system, including：
First optical element, the second optical element and the 3rd optical element, the 3rd optical element are arranged at described
Between one optical element and the second optical element, the illuminating bundle for first optical element to be emitted is transmitted through described
Two optical elements.
Optionally, first optical element includes：First surface, second surface and the 3rd surface；
Second optical element includes：4th surface, the 5th surface and the 6th surface；
3rd optical element includes：7th surface and the 8th surface；
There is gap, institute between 7th surface of the 3rd optical element and the second surface of first optical element
Stating has gap between the 8th surface of the 3rd optical element and the 4th surface of second optical element；
The second surface, the 3rd surface and the 4th surface have inner total reflection interface.
Optionally, first optical element and the second optical element are prism, the first surface, second surface, the
Three surfaces, the 4th surface, the 5th surface and the 6th surface are plane；
The section shape of first optical element is triangle, and the section shape of second optical element is straight for isosceles
Angle triangle.
Optionally, the RFIR optical elements group further includes：
Relay lens；
The relay lens is neighbouring be arranged at first surface and/or, the relay lens is neighbouring to be arranged at the 6th surface.
Optionally, first optical element and/or the second optical element are curved surface prism.
Optionally, first optical element and/or at least one surface of the second optical element are curved surface.
Optionally, the 7th surface of the 3rd optical element and the 8th surface are plane, the 3rd optical element
Section shape is trapezoidal.
Optionally, the 7th surface of the 3rd optical element and the 8th surface are curved surface.
In order to solve the above technical problems, another technical solution that the utility model embodiment uses is：It provides a kind of
Optical projection system, including：
Lighting source, dmd chip, projection lens and above-described RTIR optical elements group；
The RTIR optical elements group is arranged between the lighting source and projection lens, for receiving the illumination light
The illuminating bundle of source outgoing, and light path converting is carried out to the illuminating bundle, so that the illuminating bundle is incident to the DMD
The projected light beam that chip and the reception dmd chip are exported according to the illuminating bundle, and the projected light beam is carried out
Projection lens is emitted to after light path converting；
The illuminating bundle of the lighting source outgoing is parallel with the projected light beam optical axis that the RTIR optical elements group is emitted
Or overlap, the RTIR optical elements group, lighting source and projection lens are of a straight line type arrangement.
Optionally, the lighting source is adjacent to the first surface of first optical element；
Neighbouring the 5th surface for being arranged at second optical element of the dmd chip；
The projection lens is adjacent to the 6th surface of second optical element.
The advantageous effect of the utility model embodiment is：It is different from the situation of the prior art, the utility model embodiment party
Formula, which provides a kind of RTIR optical elements group and its optical projection system, the RTIR optical elements group, to be included：First optical element, second
Optical element and the 3rd optical element, the 3rd optical element be arranged at first optical element and the second optical element it
Between, the illuminating bundle for first optical element to be emitted is transmitted through second optical element, by setting described
Three optical elements, correction projection aberration improve projection performance, meanwhile, by first optical element and the second optics member
Part sets inner total reflection interface so that and the projected light beam being emitted from RTIR optical elements group is parallel with illuminating bundle or overlaps,
So that being of a straight line type arrangement using the optical projection system of the RTIR optical elements group, compact in design is reasonable, reduces DLP projector
Size.
Description of the drawings
One or more is implemented to illustrate by corresponding attached drawing, these exemplary illustrations are not formed
Restriction to embodiment, the element for having same reference numbers label in attached drawing is expressed as similar element, unless there are special Shen
Bright, composition does not limit the figure in attached drawing.
Fig. 1 is a kind of structure diagram for optical projection system that embodiment one provides；
Fig. 2 is a kind of structure diagram for RTIR optical elements group that embodiment one provides；
Fig. 3 is a kind of structure diagram for optical projection system that embodiment two provides；
Fig. 4 is a kind of structure diagram for RTIR optical elements group that embodiment two provides.
Refering to Fig. 1 to Fig. 4,1 is optical projection system；10 be lighting source, and 11 be red LED light source, and 12 is saturating for the first collimation
Microscope group, 13 be green LED light source, and 14 be the second collimation lens set, and 15 be blue led light source, and 16 be the 3rd collimation lens set, 17
It is the first color separation eyeglass for color separation lens set, 171,172 be the second color separation eyeglass, and 18 be fly's-eye lens；20 be RTIR optics member
Part group, 21 be the first optical element, and 22 be the second optical element, and 23 be the 3rd optical element；24 be relay lens, P1 first
Surface, P2 are second surface, and P3 is the 3rd surface, and P4 is the 4th surface, and P5 is the 5th surface, and P6 is the 6th surface, P7 the
Seven surfaces, P8 are the 8th surface；30 be dmd chip, and 40 be projection lens.
Specific embodiment
For the ease of understanding the utility model, with reference to the accompanying drawings and detailed description, the utility model is carried out more
Detailed description.It should be noted that when element is expressed " being fixed on " another element, it can be directly in another element
Above or therebetween there may be one or more elements placed in the middle.When an element is expressed " connection " another element, it can
To be directly to another element or there may be one or more elements placed in the middle therebetween.This specification is used
Term " vertical ", " horizontal ", "left", "right" and similar statement for illustrative purposes only.
Unless otherwise defined, the skill of technical and scientific term all used in this specification with belonging to the utility model
The normally understood meaning of technical staff in art field is identical.In the art used in the description of the utility model in this specification
Language is intended merely to the purpose of description specific embodiment, is not intended to limitation the utility model.Art used in this specification
Language "and/or" includes the arbitrary and all combination of one or more relevant Listed Items.
RTIR optical elements group and its optical projection system described in the utility model embodiment, can be applied at digital light
It manages in (Digital Light Processing, DLP) projector, the optical projection system is with digital micro-mirror chip (Digital
Micro mirror Device, DMD) it is projected as image device to realize, wherein, by RTIR optical elements group to DMD cores
The lighting source of piece compensates, and different RTIR optical elements groups causes Different Effects to the projection performance of optical projection system.Under
Face will be specifically addressed the RTIR optical elements group and its optical projection system by several embodiments.
Embodiment one：
Referring to Fig. 1, being a kind of optical projection system that the utility model embodiment provides, which includes：Illumination
Light source 10, RTIR optical elements group 20, dmd chip 30 and projection lens 40.
RTIR optical elements group 20 is arranged between lighting source 10 and projection lens 40, and is connect positioned at dmd chip 30
In the normal direction in receipts face, the lighting source 10, RTIR optical elements group 20 and projection lens 40 are of a straight line type arrangement so that
The compact in design of optical projection system 1 is reasonable.
Specifically, the receiving plane of the dmd chip 30 is towards the RTIR optical elements group 20 so that from RTIR optics member
The illuminating bundle (a4 as shown in Figure 1) that part group 20 is emitted can be received by the receiving plane of dmd chip 30, meanwhile, dmd chip 30 is defeated
The projected light beam (a5 as shown in Figure 2) gone out can also be incident to the RTIR optical elements group 20.
In the utility model embodiment, the RTIR optical elements group 20 is located at the receiving plane of the dmd chip 30
Lower section, certainly, in some alternative embodiments, the RTIR optical elements group 20 may be located on the dmd chip 30
Receiving plane above, left side or right side etc..
It is understood that the light path of the optical projection system 1 is specially：Illuminating bundle (such as Fig. 1 being emitted from lighting source 10
Shown a1), it is received by RTIR optical elements group 20 and carries out light path converting, the illuminating bundle after light path converting is (as shown in Figure 1
A4 dmd chip 30) is emitted to from the RTIR optical elements group 20, the dmd chip 30 exports projected light beam (as shown in Figure 1
A5) and it is incident to the RTIR optical elements group 20, carries out light path converting, the projected light beam after light path converting is (as shown in Figure 1
A6) projection lens 40 is emitted to from the RTIR optical elements group 20.Wherein, the illuminating bundle that the lighting source 10 is emitted
(a1 as shown in Figure 1) is parallel with projected light beam (a6 as shown in Figure 1) optical axis that the RTIR optical elements group 20 is emitted or again
It closes so that RTIR optical elements group 20, lighting source 10 and projection lens 40 can be of a straight line type arrangement, so that projection system
The layout more compact and reasonable of system 1 reduces the size of DLP projector.
Specifically, the lighting source 10 is used to generate white illumination beam.The lighting source 10 includes：Red LED
Light source 11 and the first collimation lens set 12 being arranged at immediately ahead of its light path, green LED light source 13 and it is arranged at its light path
Second collimation lens set 14, blue led light source 15 and the 3rd collimation lens set being arranged at immediately ahead of its light path in front
16th, color separation lens set 17 and fly's-eye lens 18.The color separation lens set includes：Vertically disposed first color separation eyeglass, 171 He
Second color separation eyeglass 172 by reflecting and/or transmiting the light of different colours, realizes the closing light of three-color LED light source, generates white
Illuminating bundle.
In some alternative embodiments, the lighting source 10 can also be by the white of RGB three-color LED integrated chips
Color LED light source can directly obtain white illumination beam.
For exporting projected light beam, projection lens 40 is then used to project the projected light beam to outer the dmd chip 30
In portion's display screen, projection is realized.
Referring to Fig. 2, be the utility model embodiment provide a kind of RTIR optical elements group, the RTIR optical elements
Group 20 carries out light path converting for receiving the illuminating bundle of the outgoing of lighting source 10 to the illuminating bundle, so that described
Illuminating bundle is incident to dmd chip 30 and receives the projected light beam that the dmd chip 30 is exported according to the illuminating bundle,
And projection lens 40 is emitted to after carrying out light path converting to the projected light beam, is specifically included：First optical element 21, second
22 and the 3rd optical element 23 of optical element.
First optical element 21 includes：First surface P1, second surface P2 and the 3rd surface P3, wherein, described
Two surface P2 and the 3rd surface P3 have total internal reflection interface.
Second optical element 22 includes：4th surface P4, the 5th surface P5 and the 6th surface P6, wherein, described
Four surface P4 have total internal reflection interface.
3rd optical element 23 includes：7th surface P7 and the 8th surface P8, the 3rd optical element 23 are set
Between 21 and second optical element 22 of the first optical element, specifically, the 7th surface of the 3rd optical element 23
P7, which closes on to be arranged between the second surface P2, the 7th surface P7 and second surface P2 of first optical element 21, to be passed through
Small the air gap is optical coupled；8th surface P8 neighbours of the 3rd optical element 23 are arranged at the second optics member
It is optical coupled by small the air gap between 4th surface P4 of part 22, the 8th surface P8 and the 4th surface P4.
3rd optical element 23 is used to the illuminating bundle that first optical element 21 is emitted being transmitted through described the
Two optical elements, specifically, the illuminating bundle transmitted from the second surface P2 of the first optical element 21 is in the 3rd optical element 23
It is middle to reflect, and it is transmitted into through the 3rd optical element 23 the 4th surface P4 of the second optical element 22 so that the 4th surface
P4 gives full play to compensating action.Particularly, when illuminating bundle to be less than the incident angles of special angle to the 3rd optical element
When 23, the 3rd optical element 23 can be incident to the angle of dmd chip 30 by refraction correction illuminating bundle, reduce picture
Distortion and optical aberration.
Wherein, the refractive index of the 3rd optical element 23 is less than 21 and second optical element 22 of the first optical element
Refractive index, and close to air refraction.The refractive index of the 3rd optical element 23 of change can be passed through so that be incident to described
Different degrees of refraction occurs for the illuminating bundle of the 3rd optical element 23, and then corrects the illuminating bundle for being emitted to dmd chip 30,
The projected light beam for being emitted to projection lens from the second optical element 22 is enabled to be incident to projection lens 40 completely, reduces picture
Distortion and optical aberration improve projection performance, and enable to the projected light beam being emitted from the second optical element 22 and illumination
The illuminating bundle optical axis coincidence that light source 10 is emitted so that the compact in design of optical projection system 1 is reasonable, reduces the size of DLP projector.
Certainly, in some alternative embodiments, the refractive index of the 3rd optical element 23 can also be with described
One optical element 21 is identical with the refractive index of the second optical element 22.
In the utility model embodiment, 21 and second optical element 22 of the first optical element is prism, i.e. institute
It is plane to state first surface P1, second surface P2, the 3rd surface P3, the 4th surface P4, the 5th surface P5 and the 6th surface P6.
Certainly, in some alternative embodiments, 21 and/or second optical element 22 of the first optical element is curved surface prism,
First optical element 21 and/or second optical element, 22 at least one surface are curved surface.
Wherein, 21 section shape of the first optical element is triangle, the second surface P2 and the 3rd surface P3 it
Between angle be 20 ° to 45 °, meet snell law so that second surface P2 and the 3rd surface P3 have inner total reflection interface,
And by adjusting the angle between the second surface P2 and the 3rd surface P3, RTIR optical elements group 20 is enabled to be emitted
The illuminating bundle optical axis coincidence being emitted to the projected light beam of projection lens 40 with lighting source 10, improves projection performance.
Second optical element, 22 section shape is isosceles right triangle, and the 5th surface P5 is perpendicular to described the
The angle of six surface P6, the 4th surface P4 and the 5th surface P5 and the 6th surface P6 are 45 °, meet Si Nieerding
Rule so that the 4th surface P4 has inner total reflection interface.
The section shape of 3rd optical element 23 is trapezoidal, and the 7th surface P7 and the 8th surface P8 are plane.When
So, in some alternative embodiments, the 7th surface P7 and the 8th surface P8 can also be curved surface, can be to illumination light
Shu Jinhang convergence compensation alignments.
Further, the 6th surface P6 of the 3rd surface P3 and the second optical element 22 of first optical element 21 hang down
Directly, and with the 5th surface P5 it is oppositely arranged, the 6th surface P6 and the 3rd surface P3 are not connected to.
Further, first optical element 21 is identical with 22 material of the second optical element, generally optical glass or
Person's quartz glass etc. is uniform, flawless, isotropism, good transmittance, dispersive power are high, the small material of temperature coefficient.Described first
The refractive index of 21 and second optical element 22 of optical element is all higher than the air refraction.
Further, in the utility model embodiment, the RTIR optical elements group 20 further includes：Relay lens
24, the relay lens 24 is neighbouring to be arranged at first surface P1, and the illuminating bundle for being emitted to lighting source 10 converges
Compensation improves projection performance.
In some alternative embodiments, the relay lens 24 is neighbouring to be arranged at the 6th surface P6, for outgoing
Projected light beam to projection lens 40 carries out convergence compensation, improves projection performance.
Certainly, in some embodiments, the relay lens 24 can also be arranged on simultaneously the first surface P1 and
6th surface P6.
Referring again to Fig. 1, in optical projection system 1, the lighting source 10 is adjacent to the first surface P1, in the photograph
Relay lens 24 is set between Mingguang City source 10 and first surface P1, and the illuminating bundle for being emitted to lighting source 10 converges
Compensation improves projection performance；The dmd chip 30 is neighbouring to be arranged at the 5th surface P5, and is put down with the 5th surface P5
Row；The projection lens 40 is adjacent to the 6th surface P6, and is arranged in parallel with the 6th surface P6 so that through the second light
It is vertical with the 6th surface P6 to learn the central optical axis of the projected light beam of the 4th surface P4 total reflections of element 22, and then, vertically
It is incident to projection lens 40.
It is understood that the detailed process that the RTIR optical elements group 20 carries out light path converting is：Illuminating bundle via
The refraction of relay lens 24 is incident to the first optical element 21, is received by the first surface P1 of the first optical element 21 and refracts to the
Two surface P2 in second surface P2 full transmittings to the 3rd surface P3, are all-trans in the 3rd surface P3 and are incident upon the 3rd optical element 23, warp
Second optical element 22 is transmitted through by the 3rd optical element 23, is emitted from the 5th surface P5 of second optical element 22
To dmd chip 30, the dmd chip 30 exports projected light beam and is emitted to the 4th surface P4 through the 5th surface P5, on the 4th surface
After P4 transmitting total reflections, projection lens 40 is emitted to via the 6th surface P6 transmissions, at this point, being emitted to through the 6th surface P6 transmissions
The projected light beam of projection lens 40 is parallel with the illuminating bundle optical axis or overlaps so that RTIR optical elements group 20, illumination light
Source 10 and projection lens 40 can be of a straight line type arrangement, so that the layout of optical projection system 1 more compact and reasonable, reduces
The size of DLP projector.
The advantageous effect of the utility model embodiment is：It is different from the situation of the prior art, the utility model embodiment party
Formula, which provides a kind of RTIR optical elements group and its optical projection system, the RTIR optical elements group, to be included：First optical element, second
Optical element and the 3rd optical element, the 3rd optical element be arranged at first optical element and the second optical element it
Between, the illuminating bundle for first optical element to be emitted is transmitted through second optical element, by setting described
Three optical elements, correction projection aberration improve projection performance, meanwhile, by first optical element and the second optics member
Part sets inner total reflection interface so that and the projected light beam being emitted from RTIR optical elements group is parallel with illuminating bundle or overlaps,
So that being of a straight line type arrangement using the optical projection system of the RTIR optical elements group, compact in design is reasonable, reduces DLP projector
Size.
Embodiment two：
Referring to Fig. 3, it is a kind of optical projection system that the utility model embodiment provides, the optical projection system 1 and embodiment
One compared to essentially identical, and identical content refers to embodiment one, does not repeat one by one herein.
Its distinctive points is, in the utility model embodiment, the first optics member of the RTIR optical elements group 20
21 and/or second optical element 22 of part is curved surface prism, and the curved surface prism is in the first optical element 21 and/or the second light
The prism that at least one surface in element 22 is curved surface is learned, by the first optical element 21 and/or the second optical element 22
At least one surface curved surface is set to replace the combination of right-angle prism and relay lens 24 in embodiment one, to lighting source
It the illuminating bundles of 10 outgoing and/or is emitted to the projected light beam of projection lens 40 and carries out convergence compensation, improve projection performance.
The curved surface is free form surface, can be described by following formula：
Wherein, Z is curved surface height, and X, Y are respectively projection coordinate of the curved surface height in optical axis, A1To A9For location parameter, c
It is curvature parameters with k.
Specifically, referring to Fig. 4, in the utility model embodiment, the first surface P1 of the first optical element 21 and
3rd surface P3 is arranged to curved surface, when the illuminating bundle that lighting source 10 is emitted is incident to first surface P1, first surface
Light can be converged to the target location of second surface P2 by P1, be all-trans via second surface P2 and be incident upon the 3rd surface P3, the 3rd table
Face P3 carries out light convergence compensation once more so that illuminating bundle can completely be incident in dmd chip 30 and be projected, and improve
Project performance.
It is understood that in some alternative embodiments, can also curved surface be set on the second optical element 22,
Alternatively, the first optical element 21 and the second optical element 22 are respectively provided with curved surface, set curved surface can be on a surface
It sets, or it sets or so surface is respectively provided with curved surface etc., can be combined on both surfaces,
This is not repeated one by one.
In the utility model embodiment, the 7th surface P7 and the 8th surface P8 of the 3rd optical element 23 are flat
Face.In some alternative embodiments, the 7th surface P7 and the 8th surface P8 of the 3rd optical element 23 can also be
Curved surface can carry out illuminating bundle convergence compensation alignment.
The advantageous effect of the utility model embodiment is：It is different from the situation of the prior art, the utility model embodiment party
Formula, which provides a kind of RTIR optical elements group and its optical projection system, the RTIR optical elements group, to be included：First optical element, second
Optical element and the 3rd optical element, the 3rd optical element be arranged at first optical element and the second optical element it
Between, the illuminating bundle for first optical element to be emitted is transmitted through second optical element, by setting described
Three optical elements, correction projection aberration improve projection performance, meanwhile, by first optical element and the second optics member
Part sets inner total reflection interface so that and the projected light beam being emitted from RTIR optical elements group is parallel with illuminating bundle or overlaps,
So that being of a straight line type arrangement using the optical projection system of the RTIR optical elements group, compact in design is reasonable, reduces DLP projector
Size.
It is worth noting that, in the above-described embodiments, the concrete structure of the RTIR optical elements group is not limited to above-mentioned
Described mode, it is every illuminating bundle and projected light beam to be totally reflected by RTIR optical element groups, realize light path
Conversion, lighting source and optical projection system is made to be of a straight line type arrangement and belong to the scope of protection of the utility model；The illumination light
The structure type in source is also not limited to the structure of embodiment.
It should be noted that the preferable implementation of the utility model is given in the specification and its attached drawing of the utility model
Mode, still, the utility model can be realized by many different forms, however it is not limited to the described implementation of this specification
Mode, these embodiments are not as the additional limitation to the utility model content, the purpose of providing these embodiments is that making
To the understanding more thorough and comprehensive of the disclosure of the utility model.Also, above-mentioned each technical characteristic continues to be mutually combined, and is formed
The various embodiments not being enumerated above are accordingly to be regarded as the scope of the utility model specification record；Further, to this field
For those of ordinary skill, it can be improved or converted according to the above description, and all these modifications and variations should all belong to
The protection domain of the appended claims for the utility model.
Claims (10)
1. a kind of RTIR optical elements group, applied to optical projection system (1), which is characterized in that including：
First optical element (21), the second optical element (22) and the 3rd optical element (23), the 3rd optical element (23)
It is arranged between first optical element (21) and the second optical element (22), for first optical element (21) to be gone out
The illuminating bundle penetrated is transmitted through second optical element (22).
2. RTIR optical elements group according to claim 1, which is characterized in that
First optical element (21) includes：First surface (P1), second surface (P2) and the 3rd surface (P3)；
Second optical element (22) includes：4th surface (P4), the 5th surface (P5) and the 6th surface (P6)；
3rd optical element (23) includes：7th surface (P7) and the 8th surface (P8)；
7th surface (P7) of the 3rd optical element (23) and the second surface (P2) of first optical element (21) it
Between there is gap, the 8th surface (P8) of the 3rd optical element (23) and the 4th surface of second optical element (22)
(P4) there is gap between；
The second surface (P2), the 3rd surface (P3) and the 4th surface (P4) have inner total reflection interface.
3. RTIR optical elements group according to claim 2, which is characterized in that
First optical element (21) and the second optical element (22) are prism, the first surface (P1), second surface
(P2), the 3rd surface (P3), the 4th surface (P4), the 5th surface (P5) and the 6th surface (P6) are plane；
The section shape of first optical element (21) is triangle, the section shape of second optical element (22) for etc.
Waist right angled triangle.
4. RTIR optical elements group according to claim 3, which is characterized in that
The RTIR optical elements group (20) further includes：Relay lens (24)；
The relay lens (24) is neighbouring be arranged at first surface (P1) and/or, the relay lens (24) is neighbouring to be arranged at the
Six surfaces (P6).
5. RTIR optical elements group according to claim 2, which is characterized in that
First optical element (21) and/or the second optical element (22) are curved surface prism.
6. RTIR optical elements group according to claim 5, which is characterized in that first optical element (21) and/or
At least one surface of second optical element (22) is curved surface.
7. according to claim 1-6 any one of them RTIR optical element groups, which is characterized in that the 3rd optical element
(23) the 7th surface (P7) and the 8th surface (P8) is plane, and the section shape of the 3rd optical element (23) is trapezoidal.
8. according to claim 1-6 any one of them RTIR optical element groups, which is characterized in that the 3rd optical element
(23) the 7th surface (P7) and the 8th surface (P8) is curved surface.
9. a kind of optical projection system, which is characterized in that including：
Lighting source (10), dmd chip (30), projection lens (40) and such as claim 1-8 any one of them RTIR optics
Element group (20)；
The RTIR optical elements group (20) is arranged between the lighting source (10) and projection lens (40), for receiving
The illuminating bundle of lighting source (10) outgoing is stated, and light path converting is carried out to the illuminating bundle, so that the illuminating bundle
It is incident to the dmd chip (30) and receives the projected light beam that the dmd chip (30) exports according to the illuminating bundle,
And it is emitted to projection lens (40) after carrying out light path converting to the projected light beam；
The illuminating bundle of lighting source (10) outgoing and the projected light beam optical axis of the RTIR optical elements group (20) outgoing
Parallel or coincidence, the RTIR optical elements group (20), lighting source (10) and projection lens (40) are of a straight line type arrangement.
10. optical projection system according to claim 9, which is characterized in that
The first surface (P1) of neighbouring first optical element (21) of the lighting source (10)；
Neighbouring the 5th surface (P5) for being arranged at second optical element (22) of the dmd chip (30)；
6th surface (P6) of neighbouring second optical element (22) of the projection lens (40).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721659480.8U CN207424510U (en) | 2017-12-01 | 2017-12-01 | A kind of RTIR optical elements group and its optical projection system |
| PCT/CN2018/088976 WO2019104970A1 (en) | 2017-12-01 | 2018-05-30 | Rtir optical element group and projection system using same |
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| CN201721659480.8U CN207424510U (en) | 2017-12-01 | 2017-12-01 | A kind of RTIR optical elements group and its optical projection system |
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| WO (1) | WO2019104970A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019104970A1 (en) * | 2017-12-01 | 2019-06-06 | 广景视睿科技（深圳）有限公司 | Rtir optical element group and projection system using same |
| CN110579928A (en) * | 2018-06-08 | 2019-12-17 | 中强光电股份有限公司 | Projection device and head-mounted display device |
| CN112835202A (en) * | 2019-11-25 | 2021-05-25 | 青岛海信激光显示股份有限公司 | Laser projection equipment |
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| CN1580867A (en) * | 2003-08-14 | 2005-02-16 | 台达电子工业股份有限公司 | Digital light treating projecting system and its projecting method |
| US6992830B1 (en) * | 2004-04-22 | 2006-01-31 | Raytheon Company | Projection display having an angle-selective coating for enhanced image contrast, and method for enhancing image contrast |
| CN101382659B (en) * | 2007-09-07 | 2010-09-29 | 鸿富锦精密工业（深圳）有限公司 | Total internal reflection prism system and method for manufacturing same |
| EP2572231A2 (en) * | 2010-05-19 | 2013-03-27 | 3M Innovative Properties Company | Fly eye integrator polarization converter |
| CN102759801A (en) * | 2011-04-25 | 2012-10-31 | 旭丽电子(广州)有限公司 | Three-dimensional optical element, manufacture method thereof and projector |
| US9756300B2 (en) * | 2013-11-20 | 2017-09-05 | Texas Instruments Incorporated | Compact optical projection apparatus |
| CN203838464U (en) * | 2014-05-15 | 2014-09-17 | 广景科技有限公司 | Linear DLP micro projector |
| CN207424511U (en) * | 2017-12-01 | 2018-05-29 | 广景视睿科技（深圳）有限公司 | A kind of optical projection system and TIR prism group |
| CN207424510U (en) * | 2017-12-01 | 2018-05-29 | 广景视睿科技（深圳）有限公司 | A kind of RTIR optical elements group and its optical projection system |
-
2017
- 2017-12-01 CN CN201721659480.8U patent/CN207424510U/en active Active
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019104970A1 (en) * | 2017-12-01 | 2019-06-06 | 广景视睿科技（深圳）有限公司 | Rtir optical element group and projection system using same |
| CN110579928A (en) * | 2018-06-08 | 2019-12-17 | 中强光电股份有限公司 | Projection device and head-mounted display device |
| CN112835202A (en) * | 2019-11-25 | 2021-05-25 | 青岛海信激光显示股份有限公司 | Laser projection equipment |
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| WO2019104970A1 (en) | 2019-06-06 |
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