CN108594575A - A kind of micro- projection arrangement - Google Patents
A kind of micro- projection arrangement Download PDFInfo
- Publication number
- CN108594575A CN108594575A CN201810614708.4A CN201810614708A CN108594575A CN 108594575 A CN108594575 A CN 108594575A CN 201810614708 A CN201810614708 A CN 201810614708A CN 108594575 A CN108594575 A CN 108594575A
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- Prior art keywords
- laser
- diaphragm
- dove prism
- laser diode
- micro
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- 238000003384 imaging method Methods 0.000 claims abstract description 20
- 238000009738 saturating Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 210000001747 pupil Anatomy 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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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
- G03B21/208—Homogenising, shaping of the illumination light
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/48—Laser speckle optics
-
- 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
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
Abstract
A kind of micro- projection arrangement provided in an embodiment of the present invention, micro- projection arrangement includes laser diode, diaphragm, collimation lens, dichroic prism component, Dove prism, MEMS and imaging lens, diaphragm is between laser diode and collimation lens, Dove prism is between dichroic prism component and MEMS, the laser of laser diode transmitting passes through diaphragm successively, collimation lens, dichroic prism component, Dove prism, after MEMS and imaging lens, obtain projected picture, wherein, diaphragm is used to remove the stray light of laser, Dove prism is for compressing laser.Using micro- projection arrangement provided in an embodiment of the present invention, stray light can be reduced by diaphragm, laser is compressed to reduce hot spot, to improve the quality and laser utilization of projected picture by Dove prism.
Description
Technical field
The present invention relates to projection arts, more particularly to a kind of micro- projection arrangement.
Background technology
With the development of shadow casting technique, MEMS (Micro-Electro-Mechanical System, MEMS) because
It has many advantages, such as portability, low-power consumption and low cost, is widely used in shadow casting technique.
In the projection arrangement (being properly termed as micro- projection arrangement) comprising MEMS, generally including LD, (Laser Diode swash
Optical diode), collimation lens, dichroic prism component, MEMS and imaging lens.The laser of LD transmittings passes through collimation lens and two
Projected picture is obtained to after the processing of prism component, then by MEMS and imaging lens.
However, inventor has found in the implementation of the present invention, at least there are the following problems for the prior art：Due to existing
Micro- projection arrangement structure it is too simple, lead to the picture being projected out there are hot spots the phenomenon larger, stray light is more.
Invention content
The embodiment of the present invention is designed to provide a kind of micro- projection arrangement, to improve the quality and laser profit of projected picture
With rate.Specific technical solution is as follows：
An embodiment of the present invention provides a kind of micro- projection arrangement, micro- projection arrangement includes laser diode, diaphragm, standard
Straight lens, dichroic prism component, Dove prism, MEMS and imaging lens；
The diaphragm is between the laser diode and the collimation lens；
The Dove prism is between the dichroic prism component and the MEMS；
The laser of the laser diode transmitting passes through the diaphragm, the collimation lens, the dichroic prism successively
After component, the Dove prism, the MEMS and the imaging lens, projected picture is obtained, wherein the diaphragm
Stray light for removing the laser, the Dove prism is for compressing the laser.
Optionally, the fast axis direction of the laser diode is horizontal direction, and slow-axis direction is vertical with the fast axis direction.
Optionally, it is provided with circular through hole in the middle part of the diaphragm.
Optionally, the shape of the diaphragm is rectangular.
Optionally, which is characterized in that the Dove prism is achromatic lens.
Optionally, the placed angle of the Dove prism is 50 ° to 70 °.
Optionally, the imaging lens include adjusting unit, and the adjusting unit is for adjusting projector distance and the throwing
The size of shadow picture.
A kind of micro- projection arrangement provided in an embodiment of the present invention, micro- projection arrangement include laser diode, diaphragm, collimation
Lens, dichroic prism component, Dove prism, MEMS and imaging lens, diaphragm is in laser diode and collimation lens
Between, between dichroic prism component and MEMS, the laser of laser diode transmitting passes through Dove prism successively
After diaphragm, collimation lens, dichroic prism component, Dove prism, MEMS and imaging lens, projected picture is obtained,
Wherein, diaphragm is used to remove the stray light of laser, and Dove prism is for compressing laser.
Using micro- projection arrangement provided in an embodiment of the present invention, stray light can be reduced by diaphragm, pass through Dove prism
Laser is compressed to reduce hot spot, to improve the quality and laser utilization of projected picture.Certainly, implement any production of the present invention
Product or method must be not necessarily required to reach all the above advantage simultaneously.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described.
Fig. 1 is a kind of structural schematic diagram of micro- projection arrangement provided in an embodiment of the present invention；
Fig. 2 is the right view of laser diode in a kind of micro- projection arrangement provided in an embodiment of the present invention；
Fig. 3 is the vertical view of laser diode in a kind of micro- projection arrangement provided in an embodiment of the present invention；
Fig. 4 is a kind of floor map of diaphragm provided in an embodiment of the present invention；
Fig. 5 is a kind of schematic diagram of the placed angle of Dove prism provided in an embodiment of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention is described.
An embodiment of the present invention provides a kind of micro- projection arrangements, as shown in Figure 1, micro- projection arrangement includes laser diode
1.1, diaphragm 1.2, collimation lens 1.3, dichroic prism component 1.4, Dove prism 1.5, MEMS 1.6 and imaging lens
1.7.Wherein, diaphragm 1.2 is between laser diode 1.1 and collimation lens 1.3；Dove prism 1.5 is located at dichroic prism group
Between part 1.4 and MEMS 1.6；Laser diode 1.1 emit laser successively pass through diaphragm 1.2, collimation lens 1.3,
After dichroic prism component 1.4, Dove prism 1.5, MEMS 1.6 and imaging lens 1.7, projected picture is obtained；Light
Stray light of the door screen 1.2 for removing laser, Dove prism 1.5 is for compressing laser.
In embodiments of the present invention, the group number of laser diode 1.1 can be one or more groups of, and every group generally comprises three
Laser diode, for example, three laser diodes can be the transmitting monochromatic diode of red, green, blue respectively.Diaphragm 1.2 can
To be the intermediate rectangular catch with pupil, diaphragm 1.2 is mainly used for removing or reducing stray light.Collimation lens 1.3 can incite somebody to action
Incident laser is transformed into parallel laser.The lens gluing that dichroic prism component 1.4 has multiple refractive index different forms.Ladder
Shape prism 1.5 is that shape is trapezoidal lens, and Dove prism is mainly used for wider laser being compressed into thinner laser.Microcomputer
Electric system 1.6 is comprising microsensor, microactrator and micro mechanical structure etc. in the microdevice of one.Imaging lens 1.7 are logical
Include often achromatic lens, achromatic lens can reduce the aberration in projected picture.
Micro- projection arrangement in the prior art usually only includes light diode 1.1, collimation lens 1.3, dichroic prism group
Part 1.4, MEMS 1.6 and imaging lens 1.7.
Using micro- projection arrangement provided in an embodiment of the present invention, stray light, stray light can be reduced by increasing diaphragm 1.2
After reduction, the quality of projected picture can be improved；Laser can be compressed by increasing Dove prism 1.5 to reduce hot spot, from
And improve the quality and laser utilization of projected picture.
Optionally, as a kind of embodiment of the embodiment of the present invention, the fast axis direction of laser diode 1.1 is level side
To slow-axis direction is vertical with fast axis direction.The placement direction of laser diode 1.1 is as shown in Figures 2 and 3, laser diode
Connecting line between two pins are straight is located at vertical direction, and horizontal direction is identical as the fast axis direction of laser diode, vertical direction
It is identical as the slow-axis direction of laser diode.Fig. 2 is the right view of laser diode, and Fig. 3 is the vertical view of laser diode.
In embodiments of the present invention, it is contemplated that the laser of laser diode transmitting generally comprises fast axis direction and slow axis side
To, wherein fast axis direction refers to the larger direction of laser beam divergence degree, and slow-axis direction refers to the smaller side of laser beam divergence degree
To.The fast axis direction of laser diode 1.1 is horizontal direction in the present embodiment, i.e., by the fast axis direction of laser diode 1.1
It is horizontal positioned, the slow-axis direction of laser diode 1.1 is disposed vertically.In this example the placement direction of laser diode with it is existing
The placement direction of laser diode is opposite in technology.
In scheme provided in an embodiment of the present invention, by the fast axis direction of laser diode be horizontal direction, slow-axis direction with
Fast axis direction is vertical.The diffused light in projected picture can be reduced in this way, reduce the design difficulty of imaging lens.
Optionally, as a kind of embodiment of the embodiment of the present invention, 1.2 middle part of diaphragm is provided with circular through hole, such as Fig. 4
It is shown.
In embodiments of the present invention, circular through hole is set at the middle part of diaphragm 1.2, laser can be reached by circular through hole
Collimation lens 1.3, the diameter by the way that circular through hole is arranged can change the degree for the stray light that diaphragm 1.2 removes in laser.
Optionally, as a kind of embodiment of the embodiment of the present invention, the shape of diaphragm 1.2 is rectangular.
In embodiments of the present invention, diaphragm 1.2 is set as rectangular, as shown in figure 3, the fixation of diaphragm can be facilitated in this way
And assembling.
Optionally, as a kind of embodiment of the embodiment of the present invention, Dove prism 1.5 is achromatic lens.
In embodiments of the present invention, Dove prism 1.5 is achromatic lens can reduce laser using achromatic lens
Aberration, improve the image quality of projected picture.
Optionally, as a kind of embodiment of the embodiment of the present invention, the placed angle of Dove prism 1.5 be 50 ° extremely
70 °, as shown in Figure 5.
In embodiments of the present invention, when assembling Dove prism 1.5, it is assumed that laser is incident on Dove prism in the horizontal direction
1.5, the placed angle of Dove prism (i.e. Φ in Fig. 5) is usually set as 50 °<Φ<It 70 °, can preferably compress in this way
Laser improves the compression ratio of laser.After laser is compressed, the utilization rate of light can be improved, and improves micro- projection arrangement
Fabrication tolerance can improve efficiency of assembling when producing micro- projection arrangement.
Optionally, as a kind of embodiment of the embodiment of the present invention, imaging lens 1.7 include adjusting unit, are adjusted single
Size of the member for adjusting projector distance and projected picture.
In embodiments of the present invention, imaging lens 1.7 include adjusting using bigger camera lens, imaging lens 1.7 are projected
Unit, by the adjusting unit, can adjust projector distance, the size of projected picture and projected picture quality.
It should be noted that herein, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that device or equipment including a series of elements include not only those elements, but also includes not having
There is the other element being expressly recited, or further includes for this device or the intrinsic element of equipment.In this specification
Each embodiment is all made of relevant mode and describes, and the same or similar parts between the embodiments can be referred to each other, each
What embodiment stressed is all difference from other examples.The foregoing is merely presently preferred embodiments of the present invention and
, it is not intended to limit the scope of the present invention.Any modification made by all within the spirits and principles of the present invention is equal
Replace, improve etc., it is included within the scope of protection of the present invention.
Claims (7)
1. a kind of micro- projection arrangement, which is characterized in that micro- projection arrangement include laser diode (1.1), diaphragm (1.2),
Collimation lens (1.3), dichroic prism component (1.4), Dove prism (1.5), MEMS (1.6) and imaging lens
(1.7)；
The diaphragm (1.2) is between the laser diode (1.1) and the collimation lens (1.3)；
The Dove prism (1.5) is between the dichroic prism component (1.4) and the MEMS (1.6)；
The laser of the laser diode (1.1) transmitting passes through the diaphragm (1.2), the collimation lens (1.3), described successively
Dichroic prism component (1.4), the Dove prism (1.5), the MEMS (1.6) and the imaging lens (1.7)
Later, projected picture is obtained, wherein the diaphragm (1.2) is used to remove the stray light of the laser, the Dove prism
(1.5) it is used to compress the laser.
2. the apparatus according to claim 1, which is characterized in that the fast axis direction of the laser diode (1.1) is level
Direction, slow-axis direction are vertical with the fast axis direction.
3. the apparatus according to claim 1, which is characterized in that be provided with circular through hole in the middle part of the diaphragm (1.2).
4. the apparatus according to claim 1, which is characterized in that the shape of the diaphragm (1.2) is rectangular.
5. according to claim 1-4 any one of them devices, which is characterized in that the Dove prism (1.5) is that achromatism is saturating
Mirror.
6. according to claim 1-4 any one of them devices, which is characterized in that the placed angle of the Dove prism (1.5)
It is 50 ° to 70 °.
7. according to claim 1-4 any one of them devices, which is characterized in that the imaging lens (1.7) include adjusting list
Member, the size for adjusting unit and being used to adjust projector distance and the projected picture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810614708.4A CN108594575A (en) | 2018-06-14 | 2018-06-14 | A kind of micro- projection arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810614708.4A CN108594575A (en) | 2018-06-14 | 2018-06-14 | A kind of micro- projection arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108594575A true CN108594575A (en) | 2018-09-28 |
Family
ID=63627535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810614708.4A Pending CN108594575A (en) | 2018-06-14 | 2018-06-14 | A kind of micro- projection arrangement |
Country Status (1)
| Country | Link |
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| CN (1) | CN108594575A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546041A (en) * | 2008-03-28 | 2009-09-30 | 鸿富锦精密工业（深圳）有限公司 | Projecting system |
| US20140078473A1 (en) * | 2012-09-14 | 2014-03-20 | Hitachi Media Electronics Co., Ltd. | Scanning type projector |
| CN104330894A (en) * | 2011-05-27 | 2015-02-04 | 日立乐金光科技株式会社 | Optical beam scanning device and image display device using the same |
| CN105684438A (en) * | 2013-11-04 | 2016-06-15 | 杜比实验室特许公司 | Single and multi-modulator projector systems with global dimming |
| CN105938977A (en) * | 2016-07-12 | 2016-09-14 | 西安炬光科技股份有限公司 | Method and system for forming linear light spots |
| CN206848675U (en) * | 2017-04-01 | 2018-01-05 | 歌尔股份有限公司 | A kind of laser scanning projection's instrument |
| CN208488642U (en) * | 2018-06-14 | 2019-02-12 | 北京一数科技有限公司 | A kind of micro- projection arrangement |
-
2018
- 2018-06-14 CN CN201810614708.4A patent/CN108594575A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546041A (en) * | 2008-03-28 | 2009-09-30 | 鸿富锦精密工业（深圳）有限公司 | Projecting system |
| CN104330894A (en) * | 2011-05-27 | 2015-02-04 | 日立乐金光科技株式会社 | Optical beam scanning device and image display device using the same |
| US20140078473A1 (en) * | 2012-09-14 | 2014-03-20 | Hitachi Media Electronics Co., Ltd. | Scanning type projector |
| CN105684438A (en) * | 2013-11-04 | 2016-06-15 | 杜比实验室特许公司 | Single and multi-modulator projector systems with global dimming |
| CN105938977A (en) * | 2016-07-12 | 2016-09-14 | 西安炬光科技股份有限公司 | Method and system for forming linear light spots |
| CN206848675U (en) * | 2017-04-01 | 2018-01-05 | 歌尔股份有限公司 | A kind of laser scanning projection's instrument |
| CN208488642U (en) * | 2018-06-14 | 2019-02-12 | 北京一数科技有限公司 | A kind of micro- projection arrangement |
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