CN104950426B - A kind of optics wide-angle lens not out of focus for Projection Display - Google Patents
A kind of optics wide-angle lens not out of focus for Projection Display Download PDFInfo
- Publication number
- CN104950426B CN104950426B CN201510363889.4A CN201510363889A CN104950426B CN 104950426 B CN104950426 B CN 104950426B CN 201510363889 A CN201510363889 A CN 201510363889A CN 104950426 B CN104950426 B CN 104950426B
- Authority
- CN
- China
- Prior art keywords
- lens
- microscope group
- focus
- optics
- plastic
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Landscapes
- Lenses (AREA)
Abstract
It is not out of focus in wide temperature range realization the invention provides a kind of optics wide-angle lens not out of focus for Projection Display, while it is clearly fine and smooth to project image quality.The camera lens mainly including the first microscope group from projection screen side to display chip side successively, the second microscope group and TIR prism, aperture diaphragm is provided between the first microscope group and the second microscope group；All eyeglasses of the first microscope group and the second microscope group are divided into two kinds of materials of colouless optical glass and colourless optical plastic；The focal power of first three the piece eyeglass entirety in the first microscope group is negative, and it is plastic aspheric lens that wherein at least has a piece of；At least a piece of in preceding four eyeglasses of the second microscope group is plastic aspheric lens, and at least part lens of other eyeglasses in preceding four eyeglasses constitute balsaming lens part, and the focal power of balsaming lens part is negative；Colouless optical glass refractive index n1 meets 1.4 ＜ n1 ＜ 1.95, and colourless optics plastic folding penetrates rate n2 and meets 1.5 ＜ n2 ＜ 1.6.
Description
Technical field
The present invention relates to a kind of optical lens structure for Projection Display.
Background technology
Generally, during projection display picture, with the accumulation of internal heat, hot defocus can be caused, is embodied in
Image blur, its root be constitute camera lens optical mirror slip and metalwork heat expansion cause change in size, now actual image planes with
Display device (such as LCD, LCOS, DMD) will no longer overlap.
Solving the common method of this problem at present has three kinds：
1. people is regulation camera lens, whether clear visually to judge；
2. driving instruction is sent by remote control to projector's built-in motor and adjusts camera lens, with visually judgement clearly with
It is no；
3. can be with the readability of monitor in real time projected picture, if image becomes mould to one camera of installation in projector
Paste, calculating camera lens by software needs to adjust amount of movement, then sends order-driven motor.Software real-time processing camera shoots
Picture is calculated and judges whether image is clear, if unintelligible, until adjusting clear position.
The essence of above-mentioned three kinds of solutions is by adjusting the axial distance between camera lens and display device, reaching projection
Picture clearly purpose.
Weak point：
The first scheme：Artificial regulation, the reduction of customer experience satisfaction.
Second scheme：Remote control and motor may fail, and can cause the reduction of customer experience satisfaction.
The third scheme：Lower with respect to second scheme reliability, camera, software and motor are possible to fail, and lead
Cause the reduction of customer experience satisfaction.
Hot defocus can also be solved the problems, such as without thermalization technology using optics, i.e., the reasonable selection during optical design
Lens material and lens spacer ring material, ensure not out of focus in wide temperature range.It is main at present using glass lens and metal every
Loop material it is reasonably combined, realize optics without thermalization.But, this scheme still has a weak point, and such as number of lenses is more, optics
System bulk is larger, cost of manufacture, install that maintenance cost is higher, therefore Market reaction effect is not satisfactory.
The content of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of optics wide-angle lens not out of focus for Projection Display
Head, it is not out of focus in wide temperature range realization, while it is clearly fine and smooth to project image quality.
Technical solution of the invention is：
For the optics wide-angle lens not out of focus of Projection Display, including from projection screen side to display chip side successively
One microscope group, the second microscope group and TIR prism, aperture diaphragm is provided between the first microscope group and the second microscope group；First microscope group and second
All eyeglasses of microscope group are divided into two kinds of materials of colouless optical glass and colourless optical plastic；First three piece eyeglass in first microscope group is whole
The focal power of body is negative, and it is plastic aspheric lens that wherein at least has a piece of；In preceding four eyeglasses of the second microscope group at least
It is plastic aspheric lens to have a piece of, and at least part lens of other eyeglasses in preceding four eyeglasses constitute balsaming lens part,
The focal power of balsaming lens part is negative；The colouless optical glass refractive index n1 meets 1.4 ＜ n1 ＜ 1.95, colourless optics modeling
Material refractive index n2 meets 1.5 ＜ n2 ＜ 1.6.
Based on above basic solution, the present invention further makees following optimization design：
Axial distance between the rear surface of the last a piece of lens of the second microscope group and the preceding surface of TIR prism is 2--
3mm。
First microscope group, the first lens of negative power, negative power are followed successively by from projection screen side to display chip side
Second lens, the 3rd lens of negative power, the 4th lens of positive light coke, the 5th lens of positive light coke, negative power
6th lens；
Second microscope group, the 7th lens of negative power, positive light coke are followed successively by from projection screen side to display chip side
8th lens, the 9th lens of negative power, the tenth lens of negative power, the 11st lens of positive light coke.Wherein, the 7th
Lens, the 8th lens and the 9th lens combination are into three cemented doublet groups；
TIR prism is planar optical elements, using total reflection principle so that illuminating bundle and working beam are efficiently separated.
First lens, the second lens and the 6th lens are concavees lens of the bending to projection screen side, and the 3rd lens are concave-concave
Lens, the 4th lens and the 5th lens are biconvex lens；7th lens are concavees lens of the bending to projection screen side, the 8th lens
It is biconvex lens with the 11st lens, the 9th lens are biconcave lens, and the tenth lens are opposite with the bending direction of the 7th lens.
It is first lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens, the 9th saturating
Mirror and the 11st lens are the spherical lens being made using colouless optical glass；
Second lens and the tenth lens are the double surface non-spherical lens using colourless optics plastic production.
The flat-panel component that TIR prism is made for colouless optical glass.
The thermal coefficient of expansion being spaced between each eyeglass is 23.6 μm/mk.
The present invention has advantages below：
1st, in the case of equivalent technology index request, the present invention uses plastic aspherical element technology, saturating relative to full glass
Mirror, can effectively reduce the number and optical system volume of eyeglass, be effectively improved optical system optical transmittance so that throw
Shadow luminance raising；Meanwhile, plastic aspheric lens can be made using molding, in the case of batch production, the cost meeting of camera lens
It is lower.
2nd, the optical texture of the camera lens also has the advantages that simple compact, high-resolution and the low distortion of wide-angle.
Brief description of the drawings
Fig. 1 is the optical texture schematic diagram of embodiment；
@- 40 DEG C of Fig. 2 MTF；
@- 40 DEG C of Fig. 3 astigmatisms, the curvature of field and distortion；
20 DEG C of Fig. 4 MTF@；
Fig. 5 astigmatisms, the curvature of field and 20 DEG C of@of distortion；
60 DEG C of Fig. 6 MTF@；
Fig. 7 astigmatisms, the curvature of field and 60 DEG C of@of distortion.
Specific embodiment
As shown in figure 1, the present embodiment uses 11 lens, wherein 9, colouless optical glass lens, colourless optical plastic is non-
Spherical lens 2.There are the first microscope group, the second microscope group and TIR prism successively from projection screen side to display chip side.The present embodiment
The first described microscope group 1 is arranged in sequence with the first lens 01 of negative power from projection screen side to display chip side, bears light burnt
Second lens 02 of degree, the 3rd lens 03 of negative power, the 4th lens 04 of positive light coke, the 5th lens 05 of positive light coke
With the 6th lens 06 of negative power.Wherein, the first lens 01, the second lens 02 and the 6th lens 06 are bending to projection screen
The concavees lens of side, the 3rd lens 03 are biconcave lens, and the 4th lens and the 5th lens are biconvex lens.The second described microscope group 3
The 8th lens 08 of the 7th lens 07, positive light coke of negative power are arranged in sequence with from projection screen side to display chip, are born
Tenth lens 10 and the 11st lens 11 of positive light coke of the 9th lens 09, negative power of focal power, wherein the 7th lens
07 to bend the concavees lens to projection screen side, and the 8th lens 08 and the 11st lens 11 are biconvex lens, and the 9th lens 09 are
The bending direction of biconcave lens, the tenth lens 10 and the 7th lens 07 is conversely, the 7th lens 07, the 8th lens 08 and the 9th lens
09 composes three cemented doublet groups using optical cement.The TIR prism 12 is located between the 11st lens 11 and display chip 13.
Display chip 13 is located at after TIR prism 12, is placed perpendicular to optical axis offset.Aperture diaphragm 2 is located at the first microscope group and the second mirror
Between group, placed perpendicular to optical axis.
First lens 01, the second lens 02, the 3rd lens 03 constitute a lens group, i.e., whole optical system first three
Piece, this group of focal power is negative, comprising no less than piece of plastic non-spherical lens；7th lens 07, the 8th lens 08, the 9th lens
09th, four lens behind the composition of the tenth lens 10 one lens group, i.e. aperture diaphragm 2, comprising no less than piece of plastic aspheric
(so-called balsaming lens refers to that two or more optical lenses are glued at into one with optical glue for face lens and balsaming lens part
Rise).
First lens 01, the 3rd lens 03, the 4th lens 04, the 5th lens 05, the 6th lens 06, the 7th lens 07,
Eight lens 08, the 9th lens 09 and the 11st lens 11 are the spherical lens being made using colouless optical glass.
Second lens 02 and the tenth lens 10 are the double surface non-spherical lens using colourless optics plastic production.
The flat-panel component that TIR prism 12 is made for colouless optical glass.
Display chip 13 is commercialized, inter array or LCOS or LCD.
In order that obtaining camera lens meets enough operating distances, the optics wide-angle lens not out of focus should meet 2≤BFL≤3, its
Middle BFL refers to the axial distance between the 11st lens surface of surface and TIR prism 12 after the 11st lens 11.
In the present invention, the working range of camera lens is -40 DEG C -- 60 DEG C of ﹢, in order to position of focal plane drifts about under correcting different temperatures
In amount to one times of focal depth range, the colouless optical glass refractive index n1 for being used meets 1.4 ＜ n1 ＜ 1.95, and what is used is colourless
Optical plastic refractive index n2 meets 1.5 ＜ n2 ＜ 1.6.The thermal coefficient of expansion being spaced between optical lens is 23.6 μm/mk.
Lens parameters：
Focal length：9.5mm
FNO：1.6
Full filed angle：80°
Applicable temperature scope：- 40 DEG C -- 60 DEG C of ﹢
Each eyeglass radius, center thickness, airspace thickness, Index is as follows for lens material refractive index：
ASPH represents aspherical, and expression formula is as follows：
Aspherical depth r- height c- radius of curvature k, α 1 of z-, α 2, α 3, α 4, α 5, α 6- asphericity coefficients
Face 3：
K=-82.704, α 1=0, α 2=0.00013729707, α 3=-1.1368402e-006, α 4=
6.1286321e-009 α 5=-2.1321e-011, α 6=3.0516586e-014
Face 4：
K=-4.789, α 1=0, α 2=0.00025222361, α 3=-2.2450589e-006, α 4=1.042226e-
008 α 5=-4.2271926e-011, α 6=8.0883144e-014
Face 19：
K=-0.714, α 1=0, α 2=-3.8366186e-005, α 3=-3.7112024e-007, α 4=
1.7353185e-008 α 5=-1.6267129e-010, α 6=1.0209439e-012
Face 20：
K=-1.364, α 1=0, α 2=7.081189e-006, α 3=-3.5229143e-007, α 4=9.0245012e-
009 α 5=-6.5714571e-011, α 6=2.5942657e-013.
Claims (5)
1. a kind of optics wide-angle lens not out of focus for Projection Display, it is characterised in that：Including from projection screen side to display
Chip side's the first microscope group successively, the second microscope group and TIR prism, aperture diaphragm is provided between the first microscope group and the second microscope group；
All eyeglasses of the first microscope group and the second microscope group are divided into two kinds of materials of colouless optical glass and colourless optical plastic；The display core
Piece is commercialized, inter array or LCOS or LCD；
The focal power of first three the piece eyeglass entirety in the first microscope group is negative, and wherein at least has a piece of for plastic aspherical element is saturating
Mirror；
The colouless optical glass refractive index n1 meets 1.4 ＜ n1 ＜ 1.95, and colourless optics plastic folding penetrates rate n2 and meets 1.5 ＜ n2
＜ 1.6；
First microscope group, the first lens of negative power, negative power are followed successively by from projection screen side to display chip side
Second lens, the 3rd lens of negative power, the 4th lens of positive light coke, the 5th lens of positive light coke, negative power
6th lens；
Second microscope group, the 7th lens of negative power, positive light coke are followed successively by from projection screen side to display chip side
8th lens, the 9th lens of negative power, the tenth lens of negative power, the 11st lens of positive light coke；Wherein, the 7th
Lens, the 8th lens and the 9th lens combination are three negative cemented doublet groups into focal power, and the tenth lens are that plastic aspherical element is saturating
Mirror；
The TIR prism is planar optical elements, using total reflection principle so that illuminating bundle and working beam are efficiently separated；
First lens, the second lens and the 6th lens are concavees lens of the bending to projection screen side, and the 3rd lens are biconcave lens,
4th lens and the 5th lens are biconvex lens；7th lens are concavees lens of the bending to projection screen side, the 8th lens and the
11 lens are biconvex lens, and the 9th lens are biconcave lens, and the tenth lens are opposite with the bending direction of the 7th lens.
2. the optics wide-angle lens not out of focus for Projection Display according to claim 1, it is characterised in that：Second microscope group
The rear surface of last a piece of lens and the preceding surface of TIR prism between axial distance be 2--3mm.
3. the optics wide-angle lens not out of focus for Projection Display according to claim 1, it is characterised in that：
First lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens, the 9th lens and
11st lens are the spherical lens being made using colouless optical glass；
Second lens and the tenth lens are the double surface non-spherical lens using colourless optics plastic production.
4. the optics wide-angle lens not out of focus for Projection Display according to claim 1, it is characterised in that：TIR prism
For the flat-panel component that colouless optical glass is made.
5. according to any described optics wide-angle lens not out of focus for Projection Display of Claims 1-4, it is characterised in that：
The thermal coefficient of expansion being spaced between each eyeglass is 23.6 μm/mk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510363889.4A CN104950426B (en) | 2015-06-26 | 2015-06-26 | A kind of optics wide-angle lens not out of focus for Projection Display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510363889.4A CN104950426B (en) | 2015-06-26 | 2015-06-26 | A kind of optics wide-angle lens not out of focus for Projection Display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104950426A CN104950426A (en) | 2015-09-30 |
| CN104950426B true CN104950426B (en) | 2017-06-23 |
Family
ID=54165207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510363889.4A Active CN104950426B (en) | 2015-06-26 | 2015-06-26 | A kind of optics wide-angle lens not out of focus for Projection Display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104950426B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3078161B1 (en) * | 2018-02-22 | 2020-03-27 | Saint-Gobain Glass France | METHOD FOR SIMULATING THE OPTICAL POWER OF A LAMINATED GLASS |
| CN110346895B (en) | 2018-04-02 | 2021-07-23 | 中强光电股份有限公司 | Fixed focus lens |
| CN113608331B (en) * | 2021-06-30 | 2023-03-17 | 歌尔光学科技有限公司 | Projection lens and projection equipment |
| CN116149024B (en) * | 2023-04-19 | 2023-08-01 | 沂普光电(天津)有限公司 | Long-focus projection lens and system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010122458A (en) * | 2008-11-19 | 2010-06-03 | Sony Corp | Zoom lens and image pickup device |
| CN104737052A (en) * | 2012-08-08 | 2015-06-24 | 株式会社尼康 | Zoom lens, optical device, and production method for zoom lens |
| TWI507727B (en) * | 2013-04-30 | 2015-11-11 | Young Optics Inc | Zoom lens |
-
2015
- 2015-06-26 CN CN201510363889.4A patent/CN104950426B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104950426A (en) | 2015-09-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105866928B (en) | Image capturing lens assembly | |
| CN106886080B (en) | Photographing optical lens assembly, image capturing device and electronic device | |
| CN104122650B (en) | Photographing lens assembly | |
| CN106094176B (en) | Camera system lens group | |
| CN104062744B (en) | Imaging lens system | |
| CN106526802B (en) | Optical image capturing lens and image capturing device | |
| CN104238080B (en) | Imaging lens assembly and image capturing device | |
| CN109375342A (en) | Image capturing lens system and image capturing device | |
| CN106707473A (en) | Photographing optical lens and image capturing device | |
| CN104950426B (en) | A kind of optics wide-angle lens not out of focus for Projection Display | |
| CN103246047B (en) | Large-field angle low-projection ratio digital projector lens | |
| CN107024756B (en) | Optical imaging lens group, image-taking device and electronic device | |
| CN110515188A (en) | A kind of projection lens | |
| CN103217783A (en) | High-definition wide-angle lens | |
| CN101915980A (en) | Image space telecentric projection camera lens | |
| CN106199935B (en) | Zoom lens | |
| CN103631006A (en) | Large zoom ratio continuous zooming projection lens | |
| CN109298508A (en) | The photographic device of optical imagery eyeglass group and application the optical imagery eyeglass group | |
| CN109324395A (en) | A kind of undistorted glass modeling camera lens of fixed-focus | |
| CN209167650U (en) | A kind of ultra high-definition telephoto lens | |
| CN203133373U (en) | Ultra-wide angle fish-eye lens | |
| CN105759543A (en) | Projection optical system and projection device | |
| JP2012093749A (en) | Zoom projection lens | |
| CN107783265A (en) | Optical lens | |
| CN102789045B (en) | Zoom projection lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230717 Address after: 710077 Xi'an hi tech Zone 56, Xi'an, Shaanxi Province, No. 56 Patentee after: Focuslight Technologies Inc. Address before: 710077 Shaanxi High Power Semiconductor Laser Industrial Park, No. 56 Zhang 86 Road, Xi'an High-tech Zone, Shaanxi Province Patentee before: XI'AN YUSHI PHOTOELECTRIC SCIENCE & TECHNOLOGY Co.,Ltd. |