WO2019104915A1 - Système de projection et groupe de prismes tir - Google Patents

Système de projection et groupe de prismes tir Download PDF

Info

Publication number
WO2019104915A1
WO2019104915A1 PCT/CN2018/080694 CN2018080694W WO2019104915A1 WO 2019104915 A1 WO2019104915 A1 WO 2019104915A1 CN 2018080694 W CN2018080694 W CN 2018080694W WO 2019104915 A1 WO2019104915 A1 WO 2019104915A1
Authority
WO
WIPO (PCT)
Prior art keywords
prism
projection
projection system
tir
tir prism
Prior art date
Application number
PCT/CN2018/080694
Other languages
English (en)
Chinese (zh)
Inventor
高志强
杨伟樑
赵远
林清云
Original Assignee
广景视睿科技（深圳）有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 广景视睿科技（深圳）有限公司 filed Critical 广景视睿科技（深圳）有限公司
Publication of WO2019104915A1 publication Critical patent/WO2019104915A1/fr

Links

Images

Classifications

    • 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
    • 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

Definitions

  • the present application relates to the field of digital projection display technology, and in particular to a projection system and a TIR prism set.
  • DLP digital light processing
  • the existing DLP pico projector usually uses an illumination prism (TIR prism or RTIR prism) to compensate the illumination source of the digital micro mirror device (DMD) to form a telecentric optical path to match the needs of the DMD chip.
  • TIR prism or RTIR prism The incident light and the reflected light, and the conventional TIR prism projection system structure is as shown in FIG. 1.
  • the illumination beam from the illumination source 11 is once totally reflected by the TIR prism group 12 and enters the DMD chip 13, and the projection beam of the DMD chip 13 is emitted. After being transmitted through the TIR prism group 12, it is incident on the projection lens 14.
  • the illumination beam and the projection beam are perpendicular, that is, the illumination source 11 and the projection lens 14 are disposed perpendicularly, not on the same line. Due to the large volume of the TIR prism group itself, and the vertical arrangement of the conventional TIR prism projection system illumination source 11 and projection lens 14, the volume of the DLP pico projector is further increased, which is not convenient to carry. Further, It is also impossible to embed electronic devices such as mobile phones or tablets. Therefore, if DLP pico projectors are to be widely used, the size and weight of the projection system should be further reduced without affecting the projection performance to ensure high projection quality. It is also more portable.
  • the inventors have proposed a projection system and a TIR prism group, which can reduce the size of the DLP projector without affecting the projection performance.
  • the technical problem to be solved by the embodiments of the present application is to provide a projection system and a TIR prism group, which can reduce the size of the DLP projector without affecting the projection performance.
  • a technical solution adopted by the embodiment of the present application is to provide a projection system, including:
  • Illumination source TIR prism set, DMD chip and projection lens
  • the TIR prism group is disposed between the illumination source and the projection lens for receiving an illumination beam emitted by the illumination source, and optically converting the illumination beam to cause the illumination beam to be incident on the DMD a chip, and receiving a projection beam output by the DMD chip according to the illumination beam, and performing optical path conversion on the projection beam to output to a projection lens;
  • the illumination beam emitted by the illumination source is parallel or coincident with the optical axis of the projection beam emitted by the TIR prism group, and the TIR prism group, the illumination source and the projection lens are arranged in a straight line.
  • the TIR prism set comprises:
  • the first prism includes a first surface, a second surface, and a third surface;
  • the second prism includes a fourth surface, a fifth surface, and a sixth surface; wherein the second surface and the fourth surface have inner dimensions a reflective interface, the fifth surface is plated with a reflective film;
  • the DMD chip is disposed adjacent to a side of a third surface of the first prism, the illumination source is adjacent to a first surface of the first prism, and the projection lens is adjacent to a sixth surface of the second prism.
  • the shapes of the first prism and the second prism are both triangular.
  • an angle between the second surface and the third surface of the first prism is 20° to 45°, and the shape of the second prism cross section is an isosceles right triangle.
  • the DMD chip is parallel to a third surface of the first prism, the sixth surface of the second prism is perpendicular to the third surface of the first prism; and the projection beam is totally reflected by the fourth surface of the second prism
  • the central optical axis is perpendicular to the sixth surface of the second prism.
  • the fifth surface of the second prism is a plane or a curved surface.
  • a gap is formed between the second surface of the first prism and the fourth surface of the second prism.
  • a third prism is disposed between the second surface of the first prism and the fourth surface of the second prism.
  • the third prism includes: a seventh surface and an eighth surface, and the seventh surface and the eighth surface may be a plane or a curved surface;
  • a gap is formed between the seventh surface of the third prism and the second surface of the first prism; and a gap is formed between the eighth surface of the third prism and the fourth surface of the second prism.
  • a TIR prism set applied to a projection system including:
  • the first prism includes a first surface, a second surface, and a third surface; the second prism includes a fourth surface, a fifth surface, and a sixth surface; wherein the second surface and the fourth surface have inner dimensions At the reflective interface, the fifth surface is plated with a reflective film.
  • the embodiment of the present application provides a projection system and a TIR prism set
  • the projection system includes: an illumination source, a TIR prism set, a DMD chip, and a projection lens.
  • the TIR prism group is disposed between the illumination source and the projection lens, and a reflection film is disposed in the TIR prism group, so that the illumination beam emitted by the illumination source and the TIR prism group are converted into an optical path and then emitted to the projection.
  • the optical axes of the projection beams of the lens are parallel or coincident, so that the illumination source, the TIR prism group and the projection lens can be arranged in a straight line, so that the layout of the projection system is compact and reasonable, and the size of the DLP projector is reduced without affecting the projection performance. .
  • FIG. 1 is a schematic structural view of a conventional TIR prism projection system
  • FIG. 2 is a schematic structural diagram of a projection system according to an embodiment of the present application.
  • FIG. 3 is a schematic structural view of a TIR prism set provided by an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a projection system according to another embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a TIR prism set according to another embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a projection system according to another embodiment of the present application.
  • FIG. 7 is a schematic structural view of a TIR prism set according to still another embodiment of the present application.
  • Figure 8 is another embodiment of the TIR prism set shown in Figure 7.
  • 2 is a projection system
  • 21 is an illumination source
  • 22 is a TIR prism group
  • 221 is a first prism
  • 222 is a second prism
  • 2221 is a prism
  • 2222 is a relay lens
  • 223 is a third prism.
  • 23 is a DMD chip
  • 24 is a projection lens
  • P1 is the first surface
  • P2 is the second surface
  • P3 is the third surface
  • P4 is the fourth surface
  • P5 is the fifth surface
  • P6 is the sixth surface
  • P7 is the seventh surface.
  • P8 is the eighth surface.
  • the projection system of the embodiment of the present application can be applied to a Digital Light Processing (DLP) projector, and the projection system realizes projection by using a Digital Micromirror Device (DMD) as an imaging device, wherein The illumination source of the DMD chip is compensated by the TIR prism group, and different TIR prism groups have different influences on the projection performance of the projection system.
  • DMD Digital Micromirror Device
  • the projection system will be specifically described below by several embodiments.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • FIG. 2 is a projection system provided by an embodiment of the present application.
  • the projection system 2 includes an illumination source 21 , a TIR prism set 22 , a DMD chip 23 , and a projection lens 24 .
  • the TIR prism group 22 is disposed between the illumination source 21 and the projection lens 24, and is located in the normal direction of the receiving surface of the DMD chip 23, and the illumination source 21, the TIR prism group 22 and the projection lens 24 are arranged in a straight line so that the projection The layout of System 2 is compact and reasonable.
  • the receiving surface of the DMD chip 23 faces the TIR prism group 22 such that the illumination beam (a2 shown in FIG. 2) emitted from the TIR prism group 22 can be received by the receiving surface of the DMD chip 23, while the DMD
  • the projection beam output from the chip 23 (shown as a3 in Fig. 2) can also be incident on the TIR prism group 22.
  • the TIR prism group 22 is located above the receiving surface of the DMD chip 23.
  • the TIR prism group 22 may also be located at the receiving of the DMD chip 23. Below the face, left or right side, etc.
  • the optical path of the projection system 2 is specifically: an illumination beam emitted from the illumination source 21 (shown as a1 in FIG. 2), received by the TIR prism group 22, and optically converted, and the illumination path after the optical path is converted (eg, A2) shown in FIG. 2 is emitted from the TIR prism group 22 to the DMD chip 23, and the DMD chip 23 outputs a projection beam (a3 shown in FIG. 2) and is incident on the TIR prism group 22 for optical path conversion and optical path.
  • the converted projection beam (a4 as shown in FIG. 2) is emitted from the TIR prism group 22 to the projection lens 24.
  • the illumination beam (the a1 shown in FIG.
  • the illumination source 21 is parallel or coincident with the optical axis of the projection beam (a4 shown in FIG. 2) emitted by the TIR prism group 22, so that the TIR prism group 22,
  • the illumination source 21 and the projection lens 24 can be arranged in a straight line, thereby making the layout of the projection system 2 more compact and reasonable, and reducing the size of the DLP projector.
  • the illumination source 21 is used to generate a white illumination beam.
  • the illumination source 21 may be a light source component composed of a red LED light source, a green LED light source, and a blue LED light source, or may be a white LED light source.
  • the light source component consisting of the red LED light source, the green LED light source and the blue LED light source obtains a white illumination beam by mixing red, green and blue light; and the white LED light source can directly obtain a white illumination beam.
  • the DMD chip 23 is used to output a projection beam, and the projection lens 24 is used to project the projection beam into an external display screen to realize projection.
  • FIG. 3 is a TIR prism set provided by an embodiment of the present application.
  • the TIR prism set 22 is configured to receive an illumination beam emitted by the illumination source 21 and perform optical path conversion on the illumination beam to enable the illumination beam.
  • the first prism 221 has a triangular cross-sectional shape, and includes a first surface P1, a second surface P2, and a third surface P3.
  • the angle between the second surface P2 and the third surface P3 is 20° to 45°.
  • the Snell's law is satisfied such that the second surface P2 has an internal total reflection interface, and by adjusting the angle between the second surface P2 and the third surface P3, the projection beam and the illumination source that can be emitted by the TIR prism group 22 can be made.
  • the optical axis of the outgoing illumination beam of 21 is coincident to improve the projection performance.
  • the second prism 222 has a cross-sectional shape of an isosceles right triangle, and includes a fourth surface P4, a fifth surface P5, and a sixth surface P6, the fifth surface P5 being perpendicular to the sixth surface P6, the fourth
  • the surface P4 has an angle of 45° with the fifth surface P5 and the sixth surface P6, satisfies Snell's law, has an internal total reflection interface, and is coated with a reflective film in the fifth surface P5.
  • the DMD chip 23 is directed to reflect the projection beam output from the DMD chip 23 to the fourth surface P4 for total reflection such that the projection beam emitted from the second prism 222 is parallel or coincident with the optical axis of the illumination beam emitted from the illumination source 21.
  • the fifth surface P5 is a plane, and the projection beam can be compensated and reflected.
  • the third surface P3 of the first prism 221 is perpendicular to the sixth surface P6 of the second prism 222, and is disposed opposite to the fifth surface P5, and the reflective film of the fifth surface P5 faces the first
  • the third surface P3 is connected to the third surface P3.
  • first prism 221 and the second prism 222 are made of the same material, and are generally made of optical glass or quartz glass, such as uniform, non-cracking, isotropic, good in light transmittance, high in dispersion rate, and low in temperature coefficient.
  • the refractive indices of the first prism 221 and the second prism 222 are both greater than the refractive index of the air.
  • the first prism 221 and the second prism 222 are optically coupled by a slight air gap, specifically, a slight air gap optical between the second surface P2 of the first prism 221 and the fourth surface P4 of the second prism 222. Coupling, at this time, the projection beam transmitted from the first prism 221 to the second prism 222 can be refracted in the air gap, so that the fourth surface P4 fully exerts a compensation effect, in particular, when the projection beam has an incident angle smaller than a specific angle When incident on the second prism 222, the projection beam can be corrected by the refraction of the air gap to reduce picture distortion and optical aberration.
  • the micro air gap can also reduce the volume of the TIR prism group 22 to a certain extent, so that the projected beam that exits satisfies the spot size required for microdisplay.
  • the illumination source 21 is adjacent to the first surface P1
  • the DMD chip 23 is disposed adjacent to the third surface P3 and parallel to the third surface P3
  • the projection lens 24 Adjacent to the sixth surface P6 and disposed in parallel with the sixth surface P6 such that a central optical axis of a projection beam totally reflected by the fourth surface P4 of the second prism 222 is perpendicular to the sixth surface P6, thereby It is incident perpendicularly to the projection lens 24.
  • the specific process of the optical path conversion of the TIR prism group 22 is that the illumination beam is transmitted to the first prism 221 via the first surface P1, and the full emission occurs on the second surface P2 to be transmitted to the DMD chip via the third surface P3.
  • the projection beam emerging from the DMD chip 23 is incident on the second prism 222 via the third surface P3, the second surface P2, and the fourth surface P4, and is reflected on the fifth surface P5 and then totally reflected on the fourth surface P4. Transmitted to the projection lens 24 via the sixth surface P6.
  • the projection beam transmitted through the sixth surface P6 is parallel or coincident with the optical axis of the illumination beam, so that the TIR prism group 22, the illumination source 21, and the projection lens 24 can be presented.
  • the linear arrangement further makes the layout of the projection system 2 more compact and reasonable, reducing the size of the DLP projector.
  • the embodiment of the present application provides a projection system and a TIR prism set
  • the projection system includes: an illumination source, a TIR prism set, a DMD chip, and a projection lens.
  • the TIR prism group is disposed between the illumination source and the projection lens, and a reflection film is disposed in the TIR prism group, so that the illumination beam emitted by the illumination source and the TIR prism group are converted into an optical path and then emitted to the projection.
  • the optical axes of the projection beams of the lens are parallel or coincident, so that the illumination source, the TIR prism group and the projection lens can be arranged in a straight line, so that the layout of the projection system is compact and reasonable, and the size of the DLP projector is reduced without affecting the projection performance. .
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • FIG. 4 is a projection system provided by an embodiment of the present application.
  • the projection system 2 is substantially the same as the first embodiment.
  • the TIR prism group 21 further includes: a third prism 223.
  • the third prism 223 has a triangular cross-sectional shape, and the third prism 223 includes a seventh surface P7 and an eighth surface P8, and the seventh surface P7 and the eighth surface P8 are planar.
  • the seventh surface P7 and the eighth surface P8 may also be curved surfaces, which can compensate for the convergence of the light beam, reduce picture distortion and optical aberration, and improve projection performance.
  • the third prism 223 is disposed in a minute air gap of the second surface P2 of the first prism 221 and the fourth surface P4 of the second prism 222, specifically, the seventh surface P7 of the third prism 223 and the first
  • the second surface P2 of the prism 221 is optically coupled by a slight air gap
  • the eighth surface P8 of the third prism 223 and the fourth surface P4 of the second prism 222 are optically coupled by a slight air gap from the first
  • the projected beam of the prism 221 is transmitted through the third prism 223 into the second prism 222, and refraction occurs in the third prism 223, so that the fourth surface P4 sufficiently exerts a compensating action.
  • the refractive index of the third prism 223 is smaller than the refractive index of the first prism 221 and the second prism 222, and is close to the refractive index of the air.
  • the projection beam is refracted to different degrees, thereby correcting the projection beam, so that the projection beam can be completely incident on the projection lens 24, reducing picture distortion and optical aberration, improving projection performance, and capable of
  • the projection beam emitted from the second prism 222 is coincident with the optical axis of the illumination beam emitted from the illumination source 21, so that the layout of the projection system is compact and reasonable, and the size of the DLP projector is reduced.
  • the refractive index of the third prism 223 may also be the same as the refractive indices of the first prism 221 and the second prism 222.
  • the embodiment of the present application provides a projection system and a TIR prism set
  • the projection system includes: an illumination source, a TIR prism set, a DMD chip, and a projection lens.
  • the TIR prism group is disposed between the illumination source and the projection lens, and a reflection film is disposed in the TIR prism group, so that the illumination beam emitted by the illumination source and the TIR prism group are converted into an optical path and then emitted to the projection.
  • the optical axes of the projection beams of the lens are parallel or coincident, so that the illumination source, the TIR prism group and the projection lens can be arranged in a straight line, so that the layout of the projection system is compact and reasonable, and the size of the DLP projector is reduced without affecting the projection performance. .
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • FIG. 6 is a projection system provided by an embodiment of the present application.
  • the projection system 2 is substantially the same as the second embodiment.
  • the fifth surface P5 of the second prism 222 of the TIR prism group 21 is a curved surface.
  • the curved surface is a convex surface, and the inner surface of the curved surface is plated with a reflective film, which can compensate and concentrate the projection beam and then reflect.
  • the fifth surface P5 when the projection beam incident on the second prism 222 reaches the fifth surface P5, a deviation occurs, so that the projection beam after the fifth surface P5 is totally reflected by the fourth surface P4 is not completely incident on the projection lens 24, at this time, After the fifth surface P5 is set as a curved surface, the fifth surface P5 concentrates the projection beam to the target position of the fourth surface P4, so that the projection surface of the fifth surface P5 reflected to the fourth surface P4 is totally incident on the projection lens. , reduce picture distortion and optical aberrations, improve projection performance.
  • the second prism 222 is composed of a prism 2221 and a relay lens 2222, and a fifth surface P5 plated with a reflective film is disposed on the relay lens 2222 for performing projection beam Convergence and reflection.
  • the prism 2221 is a right-angled triangle, and the right-angled sides thereof are all capable of transmitting, and the first right-angled edge (b1 shown in FIG. 8) transmits the projection beam to the relay lens for concentrated reflection, and the second right-angled edge (as shown in the figure) 8) b2) transmitting the projection beam totally reflected by the fourth surface P4 to the projection lens 24.
  • the embodiment of the present application provides a projection system and a TIR prism set
  • the projection system includes: an illumination source, a TIR prism set, a DMD chip, and a projection lens.
  • the TIR prism group is disposed between the illumination source and the projection lens, and a reflection film is disposed in the TIR prism group, so that the illumination beam emitted by the illumination source and the TIR prism group are converted into an optical path and then emitted to the projection.
  • the optical axes of the projection beams of the lens are parallel or coincident, so that the illumination source, the TIR prism group and the projection lens can be arranged in a straight line, so that the layout of the projection system is compact and reasonable, and the size of the DLP projector is reduced without affecting the projection performance. .
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • a TIR prism set 22 according to an embodiment of the present application is applied to a projection system 2, and the TIR prism set 22 includes: a first prism 221 and a second prism. 222.
  • the first prism 221 includes a first surface P1, a second surface P2, and a third surface P3; the second prism 222 includes a fourth surface P4, a fifth surface P5, and a sixth surface P6; wherein the second The surface P2 and the fourth surface P4 have an internal total reflection interface, and the fifth surface P5 is plated with a reflection film.
  • the projection system 2 of the above embodiment includes the TIR prism set 22 of the embodiment, the specific content and beneficial effects of the TIR prism set 22 of the present embodiment can be referred to the contents of the embodiment of the projection system 2 described above, and will not be further described herein.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)

Abstract

L'invention concerne un système de projection et un groupe de prismes TIR, le système de projection comprenant : une source de lumière d'éclairage (21), un groupe de prismes TIR (22), une puce à matrice numérique (DMD) (23) et une lentille de projection (24), le groupe de prismes TIR (22) étant disposé entre la source de lumière d'éclairage (21) et la lentille de projection (24) ; un film réfléchissant est disposé dans le groupe de prismes TIR (22) de façon à ce qu'un faisceau de lumière d'éclairage émis par la source de lumière d'éclairage (21) soit parallèle ou qu'il coïncide avec un axe optique d'un faisceau de lumière de projection qui est émis vers la lentille de projection (24) après que la conversion de trajet de lumière ait lieu au moyen du groupe de prismes TIR (22), ce qui permet à la source de lumière d'éclairage (21), au groupe de prismes TIR (22) et à la lentille de projection (24) d'être disposés en ligne droite. Le système de projection de la présente invention permet de réduire la taille d'un projecteur DLP sans affecter la performance de projection.
PCT/CN2018/080694 2017-12-01 2018-03-27 Système de projection et groupe de prismes tir WO2019104915A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201721659556.7U CN207424511U (zh) 2017-12-01 2017-12-01 一种投影系统及tir棱镜组
CN201721659556.7 2017-12-01

Publications (1)

Publication Number Publication Date
WO2019104915A1 true WO2019104915A1 (fr) 2019-06-06

Family

ID=62396730

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/080694 WO2019104915A1 (fr) 2017-12-01 2018-03-27 Système de projection et groupe de prismes tir

Country Status (2)

Country Link
CN (1) CN207424511U (fr)
WO (1) WO2019104915A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207424510U (zh) * 2017-12-01 2018-05-29 广景视睿科技（深圳）有限公司 一种rtir光学元件组及其投影系统
CN111487837A (zh) * 2019-01-25 2020-08-04 舜宇光学（浙江）研究院有限公司 一种基于dlp技术的微型投影光引擎
CN112835202B (zh) * 2019-11-25 2023-08-01 青岛海信激光显示股份有限公司 一种激光投影设备
WO2022268221A1 (fr) * 2021-06-24 2022-12-29 青岛海信激光显示股份有限公司 Moteur optique et dispositif de projection laser
CN114077143B (zh) * 2021-10-29 2024-04-30 歌尔光学科技有限公司 投影装置、投影装置的控制方法及投影系统
CN114217497A (zh) * 2021-12-10 2022-03-22 广景视睿科技（深圳）有限公司 一种微型投影光机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101311816A (zh) * 2007-05-22 2008-11-26 中强光电股份有限公司 投影装置
CN102799055A (zh) * 2011-05-25 2012-11-28 三星电子株式会社 不具有中继透镜的图像投影设备
CN105589285A (zh) * 2016-02-19 2016-05-18 苏州佳世达光电有限公司 投影机

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101311816A (zh) * 2007-05-22 2008-11-26 中强光电股份有限公司 投影装置
CN102799055A (zh) * 2011-05-25 2012-11-28 三星电子株式会社 不具有中继透镜的图像投影设备
CN105589285A (zh) * 2016-02-19 2016-05-18 苏州佳世达光电有限公司 投影机

Also Published As

Publication number Publication date
CN207424511U (zh) 2018-05-29

Similar Documents

Publication Publication Date Title
WO2019104915A1 (fr) Système de projection et groupe de prismes tir
US20220019062A1 (en) Double telecentric projection lens and projection system
WO2017049935A1 (fr) Trajet de lumière d'éclairage projetée et son module de projection
WO2015172536A1 (fr) Microprojecteur dlp linéaire
US9482866B2 (en) Optical projection system and image projector incorporating the same
WO2016095619A1 (fr) Micro-projecteur de traitement de lumière numérique linéaire
CN105652421B (zh) 一种用于数字投影仪的镜头
CN106896633B (zh) 投影机
WO2013053171A1 (fr) Mini-projecteur à dlp et son procédé de projection
WO2017012220A1 (fr) Dispositif de projection compact
CN101915980B (zh) 像方远心定焦投影镜头
WO2020119421A1 (fr) Système d'imagerie par projection et dispositif de projection laser
US20130188156A1 (en) Optical system for projection display apparatus
WO2017020636A1 (fr) Mini-projecteur dlp
CN112462491A (zh) 投影镜头及投影机
WO2019104970A1 (fr) Groupe d'éléments optiques rtir et système de projection l'utilisant
WO2013063835A1 (fr) Microprojecteur dlp
TW201516458A (zh) 投影鏡頭
TWI421558B (zh) 用於一成像模組之投影鏡頭及成像模組
TW201736938A (zh) 投影機
KR20130043975A (ko) 등화 렌즈를 구비한 빔 프로젝터
WO2023124807A1 (fr) Dispositif de projection
WO2023284353A1 (fr) Lentille, machine de projection de lumière et dispositif d'affichage proche de l'œil
CN114967311B (zh) 一种投影系统以及电子设备
TWI495906B (zh) 自由曲面透鏡及含有該自由曲面透鏡的成像系統

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18884486

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18884486

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 06/10/2020)

122 Ep: pct application non-entry in european phase

Ref document number: 18884486

Country of ref document: EP

Kind code of ref document: A1