CN108646385A - A kind of laser projection camera lens - Google Patents
A kind of laser projection camera lens Download PDFInfo
- Publication number
- CN108646385A CN108646385A CN201810231646.9A CN201810231646A CN108646385A CN 108646385 A CN108646385 A CN 108646385A CN 201810231646 A CN201810231646 A CN 201810231646A CN 108646385 A CN108646385 A CN 108646385A
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- group
- speculum
- main beam
- lens
- lens group
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- 239000011521 glass Substances 0.000 claims description 12
- 230000004075 alteration Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims 2
- 238000009738 saturating Methods 0.000 claims 2
- 239000000571 coke Substances 0.000 abstract description 6
- 230000003287 optical effect Effects 0.000 description 19
- 230000005540 biological transmission Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 235000013372 meat Nutrition 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 239000005357 flat glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/0095—Relay lenses or rod lenses
-
- 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
- G03B21/142—Adjusting of projection 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
- G03B21/28—Reflectors in projection beam
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
This application discloses a kind of laser projection camera lenses, are related to projecting apparatus field, for increase back work distance from and meanwhile do not increase lens length.Laser projection camera lens includes turning after microscope group and speculum group, turns to be used to be turned after rear, to make main beam be incident to the plane of incidence of ultrashort burnt microscope group, turn after microscope group to include the first lens group and the second lens group to the main beam from display chip after microscope group；First lens group and the second lens group are for transmiting main beam, wherein, the equivalent focal length of first lens group be equal to the back work distance of ultrashort burnt microscope group from, and the equivalent focal length of the second lens group be equal to the back work distance of ultrashort burnt microscope group from, when the back work distance of ultrashort coke microscope group is from referring to using only ultrashort burnt microscope group normal projection, from display chip to the distance of the plane of incidence of ultrashort burnt microscope group；Speculum group be used for turn after microscope group transfer after main beam reflected at least once.The embodiment of the present application is designed applied to projection lens.
Description
Technical field
This application involves projecting apparatus field more particularly to a kind of laser projection camera lenses.
Background technology
It short distance may be implemented at present transmits the system architecture of big picture can be divided into two major classes, one kind is digital light processing
(Digital Light Procession, DLP) system, one kind be the attached silicon of liquid crystal (Liquid Crystal on Silicon,
LCOS) system.For this two classes system, because system architecture reason is (for example, for DLP system, between dmd chip and camera lens
There is TIR prism；For LCOS systems, there is X prisms and PBS prisms between LCOS panel and camera lens), it to realize good at image quality
Amount requires projection lens to have long back work distance from, wherein back work distance from referring to the distance display of projection lens most inner side eyeglass more
Between chip (such as Digital Micromirror Device (Digital Micromirror Device, DMD) chip, LCOS chip etc.) away from
From.
But as back work distance is from lengthening, camera lens entire length can be caused to increase, occupy compared with multi-projector space simultaneously
So that projecting apparatus anterior-posterior length can also increase, it is unfavorable for the miniaturization of projecting apparatus.
Invention content
Embodiments herein provides a kind of laser projection camera lens, for increase back work distance from and meanwhile not increase camera lens long
Degree.
In order to achieve the above objectives, embodiments herein adopts the following technical scheme that：
In a first aspect, providing a kind of laser projection camera lens, including turn after microscope group and speculum group, described turn is used after microscope group
It is described in the plane of incidence for the main beam from display chip being turned that the main beam is made after rear to be incident to ultrashort burnt microscope group
Turn after microscope group to include the first lens group and the second lens group；
First lens group and second lens group are for transmiting the main beam, wherein first lens group
Equivalent focal length be equal to the back work distance of the ultrashort burnt microscope group from, and the equivalent focal length of second lens group be equal to it is described
The back work distance of ultrashort coke microscope group is from ultrashort burnt microscope group normal projection is used only from finger in the back work distance of the ultrashort burnt microscope group
When, from the display chip to the distance of the plane of incidence of the ultrashort burnt microscope group；
The speculum group be used for described turn after microscope group transfer after the main beam reflected at least once.
Laser projection camera lens provided by the embodiments of the present application is changed by increasing plane mirror from display chip to throwing
The transmission path of the main beam of shadow camera lens so that the turnover direction that camera lens can be adjusted in the case of increasing operating distance, to
Reduce the overall length of camera lens.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described.
Fig. 1 be embodiments herein provide increase back work distance from laser projection camera lens structural schematic diagram one；
Fig. 2 is the opticpath schematic diagram of the first lens group and the second lens group that embodiments herein provides；
Fig. 3 be embodiments herein provide increase back work distance from laser projection camera lens structural schematic diagram two；
Fig. 4 be embodiments herein provide increase back work distance from laser projection camera lens structural schematic diagram three；
Fig. 5 is the structural schematic diagram one of the laser projection camera lens for the reduction lens length that embodiments herein provides；
Fig. 6 is the structural schematic diagram two of the laser projection camera lens for the reduction lens length that embodiments herein provides；
Fig. 7 is the structural schematic diagram three of the laser projection camera lens for the reduction lens length that embodiments herein provides；
Fig. 8 is the structural schematic diagram four of the laser projection camera lens for the reduction lens length that embodiments herein provides.
Specific implementation mode
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation describes.
Shown in referring to Fig.1, the embodiment of the present application provides a kind of laser projection camera lens, including turns after microscope group 10.Turn after
Microscope group 10 is used to be turned the incidence for making after rear main beam be incident to ultrashort coke microscope group 11 to the main beam from display chip 12
Face is projected eventually by curved reflector 15, has one or more pieces parallel between display chip 12 and ultrashort burnt microscope group 11
Glass (or total internal reflection (Total Internal Reflection, TIR) prism) 16.
Turn after microscope group 10 to include the first lens group 13 and the second lens group 14.14 edge of first lens group 13 and the second lens group
Optical axis direction is arranged between ultrashort burnt microscope group 11 and display chip 12, ultrashort coke microscope group 11, the first lens group 13 and second
14 common optical axis of lens group, the first lens group 13 and the second lens group 14 constitute doubly telecentric framework, the focal length of the first lens group 13 with
And second the focal length of lens group 14 be equal to the back work distance of ultrashort burnt microscope group 11 from D, with reference to shown in Fig. 2, ultrashort coke microscope group 11
Back work distance refer to the distance between display chip 12 with a distance from ultrashort burnt 11 incidence surface eyeglass 111 of microscope group from D.In this application,
The back work distance of ultrashort coke microscope group 11 is from the spacing range for 62mm~95mm, the first lens group 13 and the second lens group 14
45mm~82mm.
For DLP TIR frameworks, display chip 12 refers to dmd chip, and for LCOS frameworks, display chip 12 refers to LCOS cores
Piece.Above-mentioned camera lens may require that the back work distance of camera lens from longer.
The embodiment of the present application requires the first lens group 13 and the second lens group 14 constitutes doubly telecentric framework, and the first lens
The focal length of group 13 and the focal length of the second lens group 14 are equal to the back work distance of ultrashort burnt microscope group 11 from D, by it is increased this two
A group so that the light being emitted from display chip 12 realizes equal proportion transfer, former ultrashort burnt microscope group 11 is exposed to, to increase mirror
The back work distance of head is from without being redesigned to projection lens, therefore will not increasing the design difficulty of camera lens.Separately
Outside, by doubly telecentric framework, directional light is incident, and parallel light emergence reduces the influence to system aberration as far as possible.It can fill simultaneously
Divide the aberration for considering camera lens so that this two groups of eyeglasses are meeting outside above-mentioned function, can also realize certain optical aberration correcting function.
First lens group 13 may include most two panels eyeglasses.Specifically, the first lens group may include a piece of aspherical
Eyeglass；Alternatively, the first lens group may include the aspheric that the direction from close to light-emitting surface to far from light-emitting surface is arranged successively
Face eyeglass and a spheric glass, the spheric glass is for being adjusted aberration；Alternatively, the first lens group may include a piece of
Spheric glass；Alternatively, the first lens group may include two panels aspherical lens；Alternatively, the first lens group may include two panels ball
Face eyeglass.
Second lens group 14 may include most two panels that the direction from close to light-emitting surface to far from light-emitting surface is arranged successively
Spheric glass, or including a piece of aspherical lens.
For the R values and spacing of eyeglass in the first lens group and second lens group, can be carried out according to eyeglass material
Design.The thickness of eyeglass is less than or equal to 15mm in first lens group and second lens group.
With reference to shown in Fig. 3, it is a kind of example of the first lens group 13 and the second lens group 14, meets the first lens group 13
Focal length and the focal length of the second lens group 14 be equal to the back work distance of ultrashort burnt microscope group 11 from D.First lens group 13 includes
First eyeglass LS1 and the second eyeglass LS2, the second lens group 14 include third eyeglass LS3 and the 4th eyeglass LS4, amount to and use four
Piece eyeglass.Assuming that the back work distance of camera lens is 87mm from D, then each lens design requires as shown in table 1：
Table 1
Wherein, the unit of each numerical value is millimeter.R values refer to the radius of curvature of eyeglass wherein one side, along optical axis frontlighting axis direction
For just, backlight axis direction is negative.As shown in table 1, the first eyeglass LS1 tool is there are two face, and the radius of curvature in the first face is-
655.6mm, the radius of curvature in the second face are -53.04mm, other eyeglasses are also similarly.Meat thickness refers to the thickness of center of lens, between air
Gap refers to the distance of the adjacent mirror on primary optical axis in lens set.
It is another example of the first lens group 13 and the second lens group 14 with reference to shown in Fig. 4, it is same to meet first thoroughly
The focal length of microscope group 13 and the focal length of the second lens group 14 are equal to the back work distance of ultrashort burnt microscope group 11 from D.First lens group
13 include the first eyeglass LS1 and the second eyeglass LS2, the second lens group 14 include third eyeglass LS3, this three pieces eyeglass from close to go out
Smooth surface is arranged successively to the direction far from light-emitting surface (from left to right).First eyeglass LS1 is spheric glass, focal length 41.61mm；
Second eyeglass LS2 is spheric glass, focal length 52.04mm；Third eyeglass LS3 is aspherical lens, focal length 48.35mm.The
The mirror spacing of one eyeglass LS1 to the second eyeglass LS2 is 5mm, and the mirror spacing of the second eyeglass LS2 to third eyeglass LS3 are
65.09mm。
At this point, other systems parameter can be as shown in table 2, wherein there are two spherical surfaces for each eyeglass, with third eyeglass LS3
For, the radius of two minute surface is respectively 47.16mm and -49.2mm, and the thickness of third eyeglass LS3 is 15mm, third eyeglass
The spacing of LS3 and prism is 20mm, and half bore of two spherical surfaces is 21.5mm, and aspherical coefficient is -7.
Table 2
It will be understood by those skilled in the art that the design method that above-mentioned specific example only schematically illustrates, the application
Embodiment does not limit the quantity of 14 included eyeglass of the first lens group 13 or the second lens group and the R values of each eyeglass, meat are thick, empty
The design parameters such as gas gap, as long as meeting the focal length of the first lens group 13 and the focal length of the second lens group 14 equal to super short-focus mirror
The back work distance of group 11 is from D.
With reference to shown in Fig. 5-Fig. 8, increase shown in Fig. 1-Fig. 4 back work distance from laser projection camera lens framework basis
On, the embodiment of the present application provides a kind of laser projection camera lens, further includes speculum group 17, for turning after 10 transfer of microscope group
After main beam reflected at least once.
First lens group 13 and the second lens group 14 and at least a piece of speculum 17 are along the key light from display chip 12
The transmission path of beam is arranged.Since speculum is the transmission direction for changing main beam, entire camera lens back work distance will not be changed
From so practical back work distance is increased from same as in figure 1.And since the transmission direction of main beam changes, show core
Piece 12 and plate glass 16 need not keep straight line with 11 optical axis of ultrashort burnt microscope group, can adjust the turnover direction of camera lens, because
This whole lens length can accordingly reduce.The embodiment of the present application will not increase the design difficulty of camera lens, pass through light path of transferring, knot
Complete machine layout is closed, reduces Lens as far as possible.
Include the example of a piece of speculum shown in Fig. 5 for speculum 17.In the first lens group 13 and the second lens group 14
Between the first speculum 171 is set.Main beam along the outgoing of 13 optical axis of the first lens group is after the reflection of the first speculum 171, along the
Incident second lens group 14 of the optical axis of two lens groups 14.The example changes once the transmission direction of main beam.
Include the example of two panels speculum shown in Fig. 6 for speculum 17.In the first lens group 13 and the second lens group 14
Between the first speculum 171 is set, second speculum 172 is set between the second lens group 14 and ultrashort burnt microscope group 11.Thoroughly along first
The main beam of 13 optical axis of microscope group outgoing is after the reflection of the first speculum 171, along incident second lens of the optical axis of the second lens group 14
Group 14；Main beam along the outgoing of 14 optical axis of the second lens group is after the reflection of the second speculum 172, along the optical axis of ultrashort burnt microscope group 11
Incident ultrashort burnt microscope group 11.The example changes twice the transmission direction of main beam.
Include the example of three sheets of reflecting mirrors shown in Fig. 7 for speculum 17.In the first lens group 13 and the second lens group 14
Between the first speculum 171 is set, the second speculum 172 is set between the second lens group 14 and ultrashort burnt microscope group 11 and third reflects
Mirror 173.Main beam along the outgoing of 13 optical axis of the first lens group is after the reflection of the first speculum 171, along the light of the second lens group 14
Axis the second lens group 14 of incidence；Main beam along the outgoing of 14 optical axis of the second lens group is through the second speculum 172 and third speculum
After 173 reflection, along the incident ultrashort burnt microscope group of the optical axis of ultrashort burnt microscope group 11 11.The example changes the transmission direction of main beam
Three times.
Include the example of four speculums shown in Fig. 8 for speculum 17.In the first lens group 13 and the second lens group 14
Between the first speculum 171 and the second speculum 172 are set, setting third reflects between the second lens group 14 and ultrashort burnt microscope group 11
Mirror 173 and the 4th speculum 174.Main beam along the outgoing of 13 optical axis of the first lens group is reflected through the first speculum 171 and second
After the reflection of mirror 172, along incident second lens group 14 of the optical axis of the second lens group 14；Along the master of 14 optical axis of the second lens group outgoing
Light beam is after the reflection of third speculum 173 and the 4th speculum 174, along the incident ultrashort burnt microscope group of the optical axis of ultrashort burnt microscope group 11
11.The example changes the transmission direction of main beam four times.
It will be understood by those skilled in the art that the embodiment of the present application is not limited to above-mentioned four kinds of situations, equally may be used
More plate plane speculums, and minute surface size, rotation angle and the rotary shaft of each plane mirror can be according to systems
Framework is adjusted.
Claims (14)
1. a kind of laser projection camera lens, which is characterized in that including turning after microscope group and speculum group, described turn is used for after microscope group to coming
The plane of incidence for from the main beam of display chip being turned that the main beam is made after rear to be incident to ultrashort burnt microscope group, described turn after mirror
Group includes the first lens group and the second lens group；
First lens group and second lens group are for transmiting the main beam, wherein first lens group etc.
Imitate focal length be equal to the back work distance of the ultrashort burnt microscope group from, and the equivalent focal length of second lens group be equal to it is described ultrashort
Back work distance of the back work distance of burnt microscope group from, the ultrashort burnt microscope group from refer to ultrashort burnt microscope group normal projection is used only when, from
The display chip to the plane of incidence of the ultrashort burnt microscope group distance；
The speculum group be used for described turn after microscope group transfer after the main beam reflected at least once.
2. camera lens according to claim 1, which is characterized in that the speculum group include the first speculum, described first
Speculum is for after reflecting the main beam of the exit face from first lens group, making the main beam incidence institute
State the plane of incidence of the second lens group.
3. camera lens according to claim 1, which is characterized in that the speculum group includes the first speculum and the second reflection
Mirror, first speculum are described for after reflecting the main beam of the exit face from first lens group, making
The plane of incidence of incident second lens group of main beam；Second speculum is used for the exit facet from second lens group
After the main beam of outgoing is reflected, make the plane of incidence of the incident ultrashort burnt microscope group of the main beam.
4. camera lens according to claim 1, which is characterized in that the speculum group includes the first speculum, the second reflection
Mirror and third speculum, first speculum are used to carry out the main beam of the exit face from first lens group anti-
After penetrating, make the plane of incidence of incident second lens group of the main beam；Second speculum is used for saturating from described second
After the main beam of the exit face of microscope group is reflected, make the incident third speculum of the main beam；The third is anti-
Mirror is penetrated for after the main beam progress that second speculum reflects again secondary reflection, keeping the main beam incident described ultrashort
The plane of incidence of burnt microscope group.
5. camera lens according to claim 1, which is characterized in that the speculum group includes the first speculum, the second reflection
Mirror, third speculum and the 4th speculum, first speculum are used for the exit face from first lens group
After main beam is reflected, make incident second speculum of the main beam；Second speculum is used for from described the
After the main beam of one speculum reflection carries out secondary reflection again, make the plane of incidence of incident second lens group of the main beam；Institute
Third speculum is stated for after reflecting the main beam of the exit face from second lens group, making the main beam
Incident 4th speculum；4th speculum is used to carry out the main beam reflected from the third speculum anti-again
After penetrating, make the plane of incidence of the incident ultrashort burnt microscope group of the main beam.
6. camera lens according to claim 1, which is characterized in that first lens group includes most two panels eyeglasses.
7. camera lens according to claim 6, which is characterized in that first lens group includes a piece of aspherical lens.
8. camera lens according to claim 7, which is characterized in that first lens group further includes a piece of spheric glass, institute
Spheric glass is stated for being adjusted to aberration.
9. camera lens according to claim 8, which is characterized in that the aspherical lens and the spheric glass are from close to going out
Smooth surface is arranged successively to the direction far from light-emitting surface.
10. camera lens according to claim 1, which is characterized in that second lens include most two panels spheric glasses, or
Person, including a piece of aspherical lens.
11. camera lens according to claim 10, which is characterized in that the two panels spheric glass is from close light-emitting surface far from
It arranges successively in the direction of light-emitting surface.
12. according to claim 1-11 any one of them camera lenses, which is characterized in that first lens group and described second is thoroughly
The thickness of eyeglass is less than or equal to 15mm in microscope group.
13. according to claim 1-11 any one of them camera lenses, which is characterized in that the back work distance of the ultrashort burnt microscope group from
For 62mm~95mm.
14. according to claim 1-11 any one of them camera lenses, which is characterized in that first lens group is saturating with described second
The spacing range of microscope group is 45mm~82mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810231646.9A CN108646385A (en) | 2018-03-20 | 2018-03-20 | A kind of laser projection camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810231646.9A CN108646385A (en) | 2018-03-20 | 2018-03-20 | A kind of laser projection camera lens |
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| Publication Number | Publication Date |
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| CN108646385A true CN108646385A (en) | 2018-10-12 |
Family
ID=63744503
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810231646.9A Pending CN108646385A (en) | 2018-03-20 | 2018-03-20 | A kind of laser projection camera lens |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020126188A (en) * | 2019-02-06 | 2020-08-20 | セイコーエプソン株式会社 | Projection optical device and projector |
| CN113835290A (en) * | 2020-06-08 | 2021-12-24 | 华为技术有限公司 | Lens assembly of projection equipment and projection equipment |
| WO2023097767A1 (en) * | 2021-11-30 | 2023-06-08 | 歌尔光学科技有限公司 | Optical projection module and illumination device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2413537A1 (en) * | 2002-01-16 | 2003-07-16 | Eastman Kodak Company | Projection apparatus using spatial light modulator |
| CN1692297A (en) * | 2002-08-16 | 2005-11-02 | 富可视公司 | Wide angle lens system having a distorted intermediate image |
| CN102640037A (en) * | 2009-05-21 | 2012-08-15 | 伊斯曼柯达公司 | Optical projection system with curved speckle reduction element surface |
-
2018
- 2018-03-20 CN CN201810231646.9A patent/CN108646385A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2413537A1 (en) * | 2002-01-16 | 2003-07-16 | Eastman Kodak Company | Projection apparatus using spatial light modulator |
| CN1692297A (en) * | 2002-08-16 | 2005-11-02 | 富可视公司 | Wide angle lens system having a distorted intermediate image |
| CN102640037A (en) * | 2009-05-21 | 2012-08-15 | 伊斯曼柯达公司 | Optical projection system with curved speckle reduction element surface |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020126188A (en) * | 2019-02-06 | 2020-08-20 | セイコーエプソン株式会社 | Projection optical device and projector |
| CN113835290A (en) * | 2020-06-08 | 2021-12-24 | 华为技术有限公司 | Lens assembly of projection equipment and projection equipment |
| WO2023097767A1 (en) * | 2021-11-30 | 2023-06-08 | 歌尔光学科技有限公司 | Optical projection module and illumination device |
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Address after: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Applicant after: Hisense Visual Technology Co., Ltd. Address before: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Applicant before: QINGDAO HISENSE ELECTRONICS Co.,Ltd. |
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Application publication date: 20181012 |