CN207424511U - A kind of optical projection system and TIR prism group - Google Patents
A kind of optical projection system and TIR prism group Download PDFInfo
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- CN207424511U CN207424511U CN201721659556.7U CN201721659556U CN207424511U CN 207424511 U CN207424511 U CN 207424511U CN 201721659556 U CN201721659556 U CN 201721659556U CN 207424511 U CN207424511 U CN 207424511U
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Classifications
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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 optical projection system and TIR prism group, and the optical projection system includes：Lighting source, TIR prism group, dmd chip and projection lens, the TIR prism group is arranged between the lighting source and projection lens, by setting reflectance coating in TIR prism group, so that the optical axis of projected light beam of the illuminating bundle of the lighting source outgoing with being emitted to projection lens after the TIR prism group carries out light path converting is parallel or overlaps, so that lighting source, TIR prism group and projection lens can be of a straight line type arrangement.Optical projection system described in the utility model embodiment can reduce the size of DLP projector on the premise of not influencing to project performance.
Description
Technical field
The utility model embodiment is related to digital projection display technology field, more particularly to a kind of optical projection system and
TIR prism group.
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) minitype projection machine.
Existing DLP miniature projector, generally use illuminating prism (TIR prism or RTIR prisms) are brilliant to digital micro-mirror
The lighting source of piece (Digital Micro mirror Device, DMD) compensates, and telecentric beam path is formed, to match
The required incident ray of dmd chip and reflection light, and TIR prism projection system architecture conventional at present is as shown in Figure 1, come
Enter dmd chip 13 after TIR prism group 12 is once totally reflected from the illuminating bundle of lighting source 11, what DMD chips 13 were emitted
Projected light beam is incident to projection lens 14 after the transmission of TIR prism group 12, at this point, illuminating bundle and projected light beam are vertical, that is, shines
Mingguang City source 11 is vertically arranged with projection lens 14, not on the same line.Because of TIR prism group, volume itself is larger, along with this
The conventional TIR prism projection system illuminations light source 11 of kind and projection lens 14 are vertically arranged, and the DLP for more increasing its composition is micro-
The volume of type projector, it is not readily portable, further, the electronic equipments such as mobile phone or tablet computer can not be also embedded in, so,
If DLP miniature projector will be used widely on the premise of not influencing to project performance, further to reduce optical projection system
Size and weight, it is easily portable while ensureing it with high projection quality.
Based on this, a kind of optical projection system and TIR prism group are inventors herein proposed, the premise of projection performance can not influenced
The lower size for reducing DLP projector.
Utility model content
The utility model embodiment is mainly solving the technical problems that provide a kind of optical projection system and TIR prism group, energy
Enough sizes for reducing DLP projector on the premise of not influencing to project performance.
In order to solve the above technical problems, the technical solution that the utility model embodiment uses is：A kind of throwing is provided
Shadow system, including：
Lighting source, TIR prism group, dmd chip and projection lens；
The TIR prism group is arranged between the lighting source and projection lens, is gone out for receiving the lighting source
The illuminating bundle penetrated, and light path converting is carried out to the illuminating bundle, so that the illuminating bundle is incident to the DMD cores
The projected light beam that piece and the reception dmd chip are exported according to the illuminating bundle, and light is carried out to the projected light beam
Projection lens is emitted to after the conversion of road；
The illuminating bundle of lighting source outgoing is parallel with the projected light beam optical axis that the TIR prism group is emitted or again
It closes, the TIR prism group, lighting source and projection lens are of a straight line type arrangement.
Optionally, the TIR prism group includes：
First prism and the second prism；
First prism includes first surface, second surface and the 3rd surface；Second prism include the 4th surface,
5th surface and the 6th surface；Wherein, the second surface and the 4th surface have inner total reflection interface, and the 5th surface is coated with instead
Penetrate film；
Neighbouring the 3rd surface one side for being arranged at the first prism of the dmd chip, the lighting source is adjacent to described first
The first surface of prism, the projection lens is adjacent to the 6th surface of second prism.
Optionally, the shape of first prism and the second prism section is triangle.
Optionally, the angle between the second surface of first prism and the 3rd surface is 20 ° to 45 °, described second
The shape of prism section is isosceles right triangle.
Optionally, the dmd chip is parallel with the 3rd surface of the first prism, the 6th surface of second prism and the
3rd surface of one prism is vertical；The central optical axis and the second prism of the projected light beam of the 4th surface total reflection through the second prism
The 6th surface it is vertical.
Optionally, the 5th surface of second prism is plane or curved surface.
Optionally, there is gap between the second surface of first prism and the 4th surface of the second prism.
Optionally, it is provided with prism between the second surface of first prism and the 4th surface of the second prism.
Optionally, the prism includes：7th surface and the 8th surface, the 7th surface and the 8th surface can be with
For plane or curved surface；
There is gap between 7th surface of the prism and the second surface of the first prism；The prism
There is gap between 8th surface and the 4th surface of the second prism.
In order to solve the above technical problems, another technical solution that the utility model embodiment uses is：It provides a kind of
TIR prism group, applied to optical projection system, including：
First prism and the second prism；
First prism includes first surface, second surface and the 3rd surface；Second prism include the 4th surface,
5th surface and the 6th surface；Wherein, the second surface and the 4th surface have inner total reflection interface, and the 5th surface is coated with instead
Penetrate film.
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 optical projection system and TIR prism group, the optical projection system, to be included：Lighting source, TIR prism group, dmd chip and throwing
Shadow camera lens, the TIR prism group are arranged between the lighting source and projection lens, anti-by being set in TIR prism group
Penetrate film so that the illuminating bundle of the lighting source outgoing after the TIR prism group carries out light path converting with being emitted to throwing
The optical axis of the projected light beam of shadow camera lens is parallel or overlaps, so that lighting source, TIR prism groups and projection lens can be in
Linear pattern so that the compact in design of optical projection system is reasonable, reduces the size of DLP projector, and does not influence to project performance.
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 the structure diagram of existing TIR prism optical projection system；
Fig. 2 is a kind of structure diagram for optical projection system that the utility model embodiment provides；
Fig. 3 is a kind of structure diagram for TIR prism group that the utility model embodiment provides；
Fig. 4 is a kind of structure diagram for optical projection system that another embodiment of the utility model provides；
Fig. 5 is a kind of structure diagram for TIR prism group that another embodiment of the utility model provides；
Fig. 6 is a kind of structure diagram for optical projection system that the another embodiment of the utility model provides；
Fig. 7 is a kind of structure diagram for TIR prism group that the another embodiment of the utility model provides；
Fig. 8 is the another embodiment of TIR prism group shown in Fig. 7.
Refering to Fig. 2 to Fig. 8,2 be optical projection system, and 21 be lighting source, and 22 be TIR prism group, and 221 be the first prism,
222 be the second prism, and 2221 be prism, and 2222 be relay lens, and 223 be prism, and 23 be dmd chip, and 24 be projection lens
Head, P1 are first surface, and P2 is 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 are the 7th surface, and P8 is the 8th surface.
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.
Optical projection system described in the utility model embodiment can be applied to digital light processing (Digital Light
Processing, DLP) in projector, the optical projection system with digital micro-mirror chip (Digital Micro mirror Device,
DMD) projection is realized as image device, wherein, the lighting source of dmd chip is compensated by TIR prism group, it is different
TIR prism groups Different Effects are caused to the projection performance of optical projection system.It below will be by several embodiments to the optical projection system
It is specifically addressed.
Embodiment one：
Referring to Fig. 2, being a kind of optical projection system that the utility model embodiment provides, which includes：Illumination
Light source 21, TIR prism group 22, dmd chip 23 and projection lens 24.
TIR prism group 22 is arranged between lighting source 21 and projection lens 24, and positioned at 23 receiving plane of dmd chip
Normal direction on, the lighting source 21, TIR prism group 22 and projection lens 24 are of a straight line type arrangement so that optical projection system 2
Compact in design it is reasonable.
Specifically, the receiving plane of the dmd chip 23 is towards the TIR prism group 22 so that is emitted from TIR prism group 22
Illuminating bundle (a2 as shown in Figure 2) can be received by the receiving plane of dmd chip 23, meanwhile, dmd chip 23 export projection
Light beam (a3 as shown in Figure 2) can also be incident to the TIR prism group 22.
In the utility model embodiment, the TIR prism group 22 is located above the receiving plane of the dmd chip 23,
Certainly, in some alternative embodiments, the TIR prism group 22 may be located under the receiving plane of the dmd chip 23
Side, left side or right side etc..
It is understood that the light path of the optical projection system 2 is specially：Illuminating bundle (such as Fig. 2 being emitted from lighting source 21
Shown a1), it is received by TIR prism group 22 and carries out light path converting, the illuminating bundle (a2 as shown in Figure 2) after light path converting is from institute
It states TIR prism group 22 and is emitted to dmd chip 23, the dmd chip 23 exports projected light beam (a3 as shown in Figure 2) and is incident to
The TIR prism group 22 carries out light path converting, and the projected light beam (a4 as shown in Fig. 2) after light path converting is from the TIR prism
Group 22 is emitted to projection lens 24.Wherein, the illuminating bundle (a1 as shown in Figure 2) and the TIR that the lighting source 21 is emitted
Projected light beam (a4 as shown in Figure 2) optical axis that prism group 22 is emitted is parallel or overlaps so that TIR prism group 22, lighting source
21 and projection lens 24 can be of a straight line type arrangement so that the layout of optical projection system 2 more compact and reasonable, reduces DLP
The size of projector.
Specifically, the lighting source 21 is used to generate white illumination beam.The lighting source 21 can be red
The light source assembly of LED light source, green LED light source and blue led light source composition, or White LED light source.The red
The light source assembly of LED light source, green LED light source and blue led light source composition, by the way that red, green, blue is mixed to get
White illumination beam；And the White LED light source can then directly obtain white illumination beam.
For exporting projected light beam, projection lens 24 is then used to project the projected light beam to outer the dmd chip 23
In portion's display screen, projection is realized.
Referring to Fig. 3, being a kind of TIR prism group that the utility model embodiment provides, which is used for
The illuminating bundle that lighting source 21 is emitted is received, and light path converting is carried out to the illuminating bundle, so that the illuminating bundle
It is incident to dmd chip 23 and receives the projected light beam that the dmd chip 23 is exported according to the illuminating bundle, and to institute
It states after projected light beam carries out light path converting and is emitted to projection lens 24, specifically include：First prism 221 and the second prism 222.
First prism, 221 section shape is triangle, including first surface P1, second surface P2 and the 3rd surface
P3, the angle between the second surface P2 and the 3rd surface P3 is 20 ° to 45 °, meets snell law so that second surface
P2 has inner total reflection interface, and by adjusting the angle between the second surface P2 and the 3rd surface P3, enables to
The illuminating bundle optical axis coincidence that the projected light beam that TIR prism group 22 is emitted is emitted with lighting source 21 improves projection performance.
Second prism, 222 section shape is isosceles right triangle, including：4th surface P4, the 5th surface P5 and
6th surface P6, the 5th surface P5 are perpendicular to the 6th surface P6, the 4th surface P4 and the 5th surface P5
Angle with the 6th surface P6 is 45 °, meets snell law, has inner total reflection interface, in the 5th surface P5
Reflectance coating is coated with, for the reflectance coating towards dmd chip 23, the projected light beam for dmd chip 23 to be exported reflexes to the 4th surface
P4 is totally reflected so that the illuminating bundle optical axis that the projected light beam being emitted from the second prism 222 is emitted with lighting source 21 is put down
Row overlaps.In the utility model embodiment, the 5th surface P5 is plane, and projected light beam can be compensated
It reflects again.
Further, the 3rd surface P3 of first prism 221 is vertical with the 6th surface P6 of the second prism 222, and
It is oppositely arranged with the 5th surface P5, the reflectance coating of the 5th surface P5 is towards the 3rd surface P3, the 6th table
Face P6 is connected with the 3rd surface P3.
Further, first prism 221 is identical with 222 material of the second prism, generally optical glass or quartz
Glass etc. is uniform, flawless, isotropism, good transmittance, dispersive power are high, the small material of temperature coefficient.First prism 221
The air refraction is all higher than with the refractive index of the second prism 222.
First prism, 221 and second prism 222 is optical coupled by small the air gap, is specially described first
It is optical coupled by small the air gap between 4th surface P4 of the second surface P2 of prism 221 and the second prism 222,
At this point, the projected light beam that the second prism 222 is transmitted through from the first prism 221 can reflect in the air gap so that the
Four surface P4 give full play to compensating action, particularly, when projected light beam to be less than the incident angles of special angle to the second rib
During mirror 222, can picture distortion and optical aberration be reduced by the refraction correction projected light beam of the air gap.The small sky
Gas gap can also reduce the volume of TIR prism group 22 to a certain extent, its projected light beam being emitted is made to meet micro display institute
The spot size needed.
In optical projection system 2, the lighting source 21 is adjacent to the first surface P1, and the dmd chip 23 is neighbouring to be set
The 3rd surface P3 is placed in, and it is parallel with the 3rd surface P3, and the projection lens 24 is adjacent to the 6th surface P6,
It and is arranged in parallel with the 6th surface P6 so that in the projected light beam of the 4th surface P4 total reflections through the second prism 222
Heart optical axis is vertical with the 6th surface P6, and then, vertical incidence to projection lens 24.
It is understood that the detailed process that the TIR prism group 22 carries out light path converting is：Illuminating bundle is via the first table
P1 transmissions in face are incident to the first prism 221, and full transmitting occurs in second surface P2 is transmitted through dmd chip via the 3rd surface P3
23, it is incident to the from the projected light beam that dmd chip 23 is emitted via the 3rd surface P3, second surface P2 and the 4th surface P4 transmissions
Two prisms 222 occur reflection in the 5th surface P5 and then are totally reflected again in the 4th surface P4, saturating via the 6th surface P6
Injection is incident upon projection lens 24, at this point, the projected light beam through the 6th surface P6 transmission outgoing is parallel with illuminating bundle optical axis or again
It closes so that TIR prism group 22, lighting source 21 and projection lens 24 can be of a straight line type arrangement, so that optical projection system 2
Layout more compact and reasonable, reduce 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 optical projection system and TIR prism group, the optical projection system, to be included：Lighting source, TIR prism group, dmd chip and throwing
Shadow camera lens, the TIR prism group are arranged between the lighting source and projection lens, anti-by being set in TIR prism group
Penetrate film so that the illuminating bundle of the lighting source outgoing after the TIR prism group carries out light path converting with being emitted to throwing
The optical axis of the projected light beam of shadow camera lens is parallel or overlaps, so that lighting source, TIR prism groups and projection lens can be in
Linear pattern so that the compact in design of optical projection system is reasonable, reduces the size of DLP projector, and does not influence to project performance.
Embodiment two：
Referring to Fig. 4, it is a kind of optical projection system that the utility model embodiment provides, the optical projection system 2 and embodiment
One compared to essentially identical, and identical content refers to embodiment one, does not repeat one by one herein.Distinctive points are, in the utility model
In embodiment, the TIR prism group 21 further includes：Prism 223.
Specifically, referring to Fig. 5,223 section shape of prism is triangle, the prism 223 includes：
7th surface P7 and the 8th surface P8, the 7th surface P7 and the 8th surface P8 are plane.
Certainly, in some alternative embodiments, the 7th surface P7 and the 8th surface P8 can also be curved surface,
Convergence compensation can be carried out to light beam, reduces picture distortion and optical aberration, improves projection performance.
The prism 223 is arranged at the second surface P2 of first prism 221 and the 4th table of the second prism 222
In the tiny air gap of face P4, specifically, the 7th surface P7 of the prism 223 and the second table of the first prism 221
It is optical coupled by small the air gap between the P2 of face, the 8th surface P8 of the prism 223 and the second prism 222
Optical coupled by small the air gap between 4th surface P4, the projected light beam from the first prism 221 is through prism
223 are transmitted into the second prism 222, are reflected in prism 223 so that the 4th surface P4 gives full play to compensation and makees
With.
Wherein, the refractive index of the prism 223 is less than the refractive index of 221 and second prism 222 of the first prism,
And close to air refraction.The refractive index of change prism 223 can be passed through so that projected light beam occurs different degrees of
Refraction, and then correct projected light beam so that projected light beam can be incident to projection lens 24 completely, reduce picture distortion and optics
Aberration improves projection performance, and enables to what is be emitted from the projected light beam that the second prism 222 is emitted with lighting source 21
Illuminating bundle optical axis coincidence so that the compact in design of optical projection system is reasonable, reduces the size of DLP projector.
Certainly, in some alternative embodiments, the refractive index of the prism 223 can also be with first rib
Mirror 221 is identical with the refractive index of the second prism 222.
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 optical projection system and TIR prism group, the optical projection system, to be included：Lighting source, TIR prism group, dmd chip and throwing
Shadow camera lens, the TIR prism group are arranged between the lighting source and projection lens, anti-by being set in TIR prism group
Penetrate film so that the illuminating bundle of the lighting source outgoing after the TIR prism group carries out light path converting with being emitted to throwing
The optical axis of the projected light beam of shadow camera lens is parallel or overlaps, so that lighting source, TIR prism groups and projection lens can be in
Linear pattern so that the compact in design of optical projection system is reasonable, reduces the size of DLP projector, and does not influence to project performance.
Embodiment three：
Referring to Fig. 6, it is a kind of optical projection system that the utility model embodiment provides, the optical projection system 2 and embodiment
Two compared to essentially identical, and identical content refers to embodiment two, does not repeat one by one herein.Distinctive points are, in the utility model
In embodiment, the 5th surface P5 of 21 second prism 222 of TIR prism group is curved surface.
Specifically, referring to Fig. 7, the curved surface is convex surface, and the curved interior surface is coated with reflectance coating, can be to projection
Light beam is reflected again after compensating convergence.For example, when the projected light beam for being incident to the second prism 222 reaches the 5th surface
Occurs deviation during P5 so that the projected light beam that the 5th surface P5 is reflexed to after the 4th surface P4 total reflections cannot be incident to completely
Projection lens 24, at this point, after the 5th surface P5 is arranged to curved surface, which can be converged to the 4th table by the 5th surface P5
The target location of face P4 so that the projected light beam that the 5th surface P5 is reflexed to after the 4th surface P4 total reflections is incident to projection completely
Camera lens reduces picture distortion and optical aberration, improves projection performance.
Referring to Fig. 8, in some embodiments, second prism 222 is by 2222 groups of prism 2221 and relay lens
Into the 5th surface P5 for being coated with reflectance coating is arranged on relay lens 2222, for being converged and being reflected to projected light beam.
Wherein, the prism 2221 is right angled triangle, and right-angle side can be transmitted, the first right-angle side (b1 as shown in Figure 8)
Projected light beam is transmitted through in relay lens and carries out convergence reflection, the second right-angle side (b2 as shown in Figure 8) is complete by the 4th surface P4
The projected light beam of reflection is transmitted through projection lens 24.
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 optical projection system and TIR prism group, the optical projection system, to be included：Lighting source, TIR prism group, dmd chip and throwing
Shadow camera lens, the TIR prism group are arranged between the lighting source and projection lens, anti-by being set in TIR prism group
Penetrate film so that the illuminating bundle of the lighting source outgoing after the TIR prism group carries out light path converting with being emitted to throwing
The optical axis of the projected light beam of shadow camera lens is parallel or overlaps, so that lighting source, TIR prism groups and projection lens can be in
Linear pattern so that the compact in design of optical projection system is reasonable, reduces the size of DLP projector, and does not influence to project performance.
Example IV：
It is a kind of TIR prism group 22 that the utility model embodiment provides referring again to Fig. 3, Fig. 5, Fig. 7, Fig. 8, it should
For optical projection system 2, which includes：First prism 221 and the second prism 222.
First prism 221 includes first surface P1, second surface P2 and the 3rd surface P3；Second prism 222
Including the 4th surface P4, the 5th surface P5 and the 6th surface P6；Wherein, the second surface P2 and the 4th surface P4 has interior complete
Reflecting interface, the 5th surface P5 are coated with reflectance coating.
Since the above embodiment optical projection system 2 includes embodiment TIR prism group 22, present embodiment TIR ribs
The particular content and advantageous effect of microscope group 22 are referred to the content of above-mentioned 2 embodiment of optical projection system, no longer go to live in the household of one's in-laws on getting married one by one herein
It states.
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 optical projection system, which is characterized in that including：Lighting source (21), TIR prism group (22), dmd chip (23) and throwing
Shadow camera lens (24)；
The TIR prism group (22) is arranged between the lighting source (21) and projection lens (24), for receiving the photograph
The illuminating bundle of Mingguang City source (21) outgoing, and light path converting is carried out to the illuminating bundle, so that the illuminating bundle is incident
The projected light beam exported to the dmd chip (23) and the reception dmd chip (23) according to the illuminating bundle, and
Projection lens (24) is emitted to after carrying out light path converting to the projected light beam；
The illuminating bundle of the lighting source (21) outgoing it is parallel with the projected light beam optical axis that the TIR prism group (22) is emitted or
It overlaps, the TIR prism group (22), lighting source (21) and projection lens (24) are of a straight line type arrangement.
2. optical projection system according to claim 1, which is characterized in that
The TIR prism group (22) includes：First prism (221) and the second prism (222)；
First prism (221) includes first surface (P1), second surface (P2) and the 3rd surface (P3)；Second prism
(222) the 4th surface (P4), the 5th surface (P5) and the 6th surface (P6) are included；Wherein, the second surface (P2) and the 4th
Surface (P4) has inner total reflection interface, and the 5th surface (P5) is coated with reflectance coating；
Neighbouring the 3rd surface (P3) one side for being arranged at the first prism (221) of the dmd chip (23), the lighting source (21)
The first surface (P1) of neighbouring first prism (221), the of neighbouring second prism (222) of the projection lens (24)
Six surfaces (P6).
3. optical projection system according to claim 2, which is characterized in that
The shape of first prism (221) and the second prism (222) section is triangle.
4. optical projection system according to claim 3, which is characterized in that
Angle between the second surface (P2) of first prism (221) and the 3rd surface (P3) is 20 ° to 45 °, described
The shape of two prisms (222) section is isosceles right triangle.
5. optical projection system according to claim 3, which is characterized in that
The dmd chip (23) is parallel with the 3rd surface (P3) of the first prism (221), and the 6th of second prism (222) the
Surface (P6) is vertical with the 3rd surface (P3) of the first prism (221)；The 4th surface (P4) total reflection through the second prism (222)
Projected light beam central optical axis it is vertical with the 6th surface (P6) of the second prism.
6. optical projection system according to claim 2, which is characterized in that
5th surface (P5) of second prism (222) is plane or curved surface.
7. the optical projection system according to any one of claim 2 to 6, which is characterized in that
There is gap between the second surface (P2) of first prism (221) and the 4th surface (P4) of the second prism (222).
8. according to claim 2 to 6 any one of them optical projection system, which is characterized in that
Is provided between the second surface (P2) of first prism (221) and the 4th surface (P4) of the second prism (222)
Prism (223).
9. optical projection system according to claim 8, which is characterized in that
The prism (223) includes：7th surface (P7) and the 8th surface (P8), the 7th surface (P7) and the 8th table
Face (P8) can be plane or curved surface；
There is gap between 7th surface (P7) of the prism (223) and the second surface (P2) of the first prism (221)；
There is gap between 8th surface (P8) of the prism (223) and the 4th surface (P4) of the second prism (222).
10. a kind of TIR prism group, applied to optical projection system (2), which is characterized in that including：
First prism (221) and the second prism (222)；
First prism (221) includes first surface (P1), second surface (P2) and the 3rd surface (P3)；Second prism
(222) the 4th surface (P4), the 5th surface (P5) and the 6th surface (P6) are included；Wherein, the second surface (P2) and the 4th
Surface (P4) has inner total reflection interface, and the 5th surface (P5) is coated with reflectance coating.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721659556.7U CN207424511U (en) | 2017-12-01 | 2017-12-01 | A kind of optical projection system and TIR prism group |
| PCT/CN2018/080694 WO2019104915A1 (en) | 2017-12-01 | 2018-03-27 | Projection system and tir prism group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721659556.7U CN207424511U (en) | 2017-12-01 | 2017-12-01 | A kind of optical projection system and TIR prism group |
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| CN207424511U true CN207424511U (en) | 2018-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721659556.7U Active CN207424511U (en) | 2017-12-01 | 2017-12-01 | A kind of optical projection system and TIR prism group |
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| Country | Link |
|---|---|
| CN (1) | CN207424511U (en) |
| WO (1) | WO2019104915A1 (en) |
Cited By (6)
| 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 |
| CN111487837A (en) * | 2019-01-25 | 2020-08-04 | 舜宇光学（浙江）研究院有限公司 | Miniature projection light engine based on D L P technology |
| 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 |
| CN114077143A (en) * | 2021-10-29 | 2022-02-22 | 歌尔光学科技有限公司 | Projection device, control method of projection device and projection system |
| CN114217497A (en) * | 2021-12-10 | 2022-03-22 | 广景视睿科技（深圳）有限公司 | Miniature projection optical machine |
| WO2022268221A1 (en) * | 2021-06-24 | 2022-12-29 | 青岛海信激光显示股份有限公司 | Optical engine and laser projection device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101311816B (en) * | 2007-05-22 | 2011-05-25 | 中强光电股份有限公司 | Projection device |
| KR20120131359A (en) * | 2011-05-25 | 2012-12-05 | 삼성전자주식회사 | Image projection apparatus not provided with relay lens |
| CN105589285B (en) * | 2016-02-19 | 2018-04-17 | 苏州佳世达光电有限公司 | Projector |
-
2017
- 2017-12-01 CN CN201721659556.7U patent/CN207424511U/en active Active
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2018
- 2018-03-27 WO PCT/CN2018/080694 patent/WO2019104915A1/en active Application Filing
Cited By (7)
| 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 |
| CN111487837A (en) * | 2019-01-25 | 2020-08-04 | 舜宇光学（浙江）研究院有限公司 | Miniature projection light engine based on D L P technology |
| 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 |
| WO2022268221A1 (en) * | 2021-06-24 | 2022-12-29 | 青岛海信激光显示股份有限公司 | Optical engine and laser projection device |
| CN114077143A (en) * | 2021-10-29 | 2022-02-22 | 歌尔光学科技有限公司 | Projection device, control method of projection device and projection system |
| CN114077143B (en) * | 2021-10-29 | 2024-04-30 | 歌尔光学科技有限公司 | Projection device, control method of projection device and projection system |
| CN114217497A (en) * | 2021-12-10 | 2022-03-22 | 广景视睿科技（深圳）有限公司 | Miniature projection optical machine |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019104915A1 (en) | 2019-06-06 |
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