CN106199937B - A kind of optical system - Google Patents
A kind of optical system Download PDFInfo
- Publication number
- CN106199937B CN106199937B CN201610767996.8A CN201610767996A CN106199937B CN 106199937 B CN106199937 B CN 106199937B CN 201610767996 A CN201610767996 A CN 201610767996A CN 106199937 B CN106199937 B CN 106199937B
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- lens group
- eyeglass
- lens
- optical system
- focal power
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/177—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a negative front lens or group of 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
Abstract
The invention discloses a kind of optical systems, including luminescence chip, luminescence chip side is equipped with its opposite fixed first lens group, it is equipped with the movement of energy relative luminous chip between first lens group and luminescence chip and completes the second lens group that projection optical system is focused, be equipped with successively between second lens group and luminescence chip can simultaneously relative luminous chip it is mobile and complete the third lens group, diaphragm, the 4th lens group and the 5th lens group of projection optical system zoom, it is additionally provided with prism between 5th lens group and luminescence chip, wherein, the focal power φ of the first lens group1It is negative, the focal power φ of the second lens group2It is negative, the focal power φ of the third lens group3For just, the focal power φ of the 4th lens group4For just, the focal power φ of the 5th lens group5For just.The configuration of the present invention is simple, aperture is big, small, and pixel is high, can synchronous zoom, microspur focusing, high temperature is confocal and high pixel zoom.
Description
【Technical field】
The present invention relates to a kind of optical systems.
【Background technology】
The such disadvantage of the varifocal projection optical system generally existing of projector at present：Resolution ratio is relatively low, in zoom
It can not realize that synchronous zoom, i.e. camera lens need adjustment focusing group picture could be clear and right during zoom in the process
Burnt range is small, and high temperature is empty burnt, and volume is big, enlargement ratio is small etc..Currently on the market there are no camera lens can overcome simultaneously it is above-mentioned
Disadvantage, only a small number of camera lenses, can only be improved, but to sacrifice camera lens other performance index in one aspect, such as in order to
It realizes synchronous zoom, projection optical system volume must be increased；In order to realize closer focal distance, must be by projection optics system
System complicates；In order to which high temperature is confocal, glass lens must be used, are lower so as to cause resolution ratio；In order to improve projective amplification times
Rate must reduce projected picture brightness etc., these far can not meet small-sized to projection lens projection clarity, volume in the market
Change, be not necessarily to the requirements such as focusing, high temperature not empty coke during zoom, there are no the changes for overcoming all of the above disadvantage currently on the market
Out-of-focus projection's camera lens.
Therefore, the present invention is based on above deficiency and generates.
【Invention content】
The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a kind of simple in structure, aperture is big, small, pixel
Height, can synchronous zoom, microspur focusing, high temperature be confocal and the optical system of high pixel zoom.
The present invention is achieved by the following technical solutions：
A kind of optical system, it is characterised in that：Including luminescence chip 100,100 side of luminescence chip is equipped with opposite
Its fixed first lens group 10, being equipped between first lens group 10 and luminescence chip 100 can relative luminous chip 100
The second lens group 20 that is mobile and completing projection optical system focusing, between second lens group 20 and luminescence chip 100
Being equipped with successively relative luminous chip 100 to move simultaneously and complete the third lens group 30 of projection optical system zoom, diaphragm
200, the 4th lens group 40 and the 5th lens group 50 are additionally provided with prism between the 5th lens group 50 and luminescence chip 100
60, wherein the focal power φ of first lens group 101It is the focal power φ of the second negative, described lens group 202It is negative, institute
The focal power φ for the third lens group 30 stated3For just, the focal power φ of the 4th lens group 404For just, the described the 5th thoroughly
The focal power φ of microscope group 505For just.
Optical system as described above, it is characterised in that：The focal power φ of first lens group 101Meet：-0.07
≤φ1≤-0.03；The focal power φ of second lens group 202Meet：-0.03≤φ2≤-0.01；The third is saturating
The focal power φ of microscope group 303Meet：0.02≤φ3≤0.05；The focal power φ of 4th lens group 404Meet：0.01≤
φ4≤0.04；The focal power φ of 5th lens group 505Meet：0.02≤φ5≤0.04。
Optical system as described above, it is characterised in that：First lens group 10 includes the first eyeglass 1 and is located at the
The second eyeglass 2 between one eyeglass 1 and luminescence chip 100；Second lens group 20 includes third eyeglass 3；Described
Three lens groups 30 include the 4th eyeglass 4；4th lens group 40 includes the 5th eyeglass 5；5th lens group 50 packet
Include the 6th eyeglass 6 set gradually from the first lens group 10 to 100 direction of luminescence chip, the 7th eyeglass 7, the 8th eyeglass 8 and
Nine eyeglasses 9.
Optical system as described above, it is characterised in that：Second eyeglass 2 is plastic aspheric lenes, described
5th eyeglass 5 and the 9th eyeglass 9 are Glass aspheric eyeglass, first eyeglass 1, third eyeglass 3, the 4th eyeglass 4,
Six eyeglasses 6, the 7th eyeglass 7, the 8th eyeglass 8 are glass spherical lens.
Optical system as described above, it is characterised in that：6th eyeglass 6 and the 7th eyeglass 7 are to be bonded together
Cemented doublet group.
Optical system as described above, it is characterised in that：Second eyeglass 2, the 5th eyeglass 5 and the 9th eyeglass 9
Aspherical surface shape meets following equation：
In formula, parameter c is the curvature corresponding to radius, and y is radial coordinate, unit and length of lens unit phase
Together, k is circular cone whose conic coefficient；When k-factor is less than -1, the face shape curve of lens is hyperbola, when k-factor is equal to -1
When, the face shape curve of lens is parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, works as k-factor
When equal to 0, the face shape curve of lens is circle, and when k-factor is more than 0, the face shape curve of lens is oblateness；a1To a8Respectively
Indicate asphericity coefficient.
Compared with prior art, the present invention has the following advantages：
1, the present invention completes to defocused, to realize during zoom without focusing and energy again in same projector distance
Ensure that whole projected picture is clear, can be realized during the entire zoom from low power to high power closely to infinity range
Interior clear projection.
2, resolution ratio of the present invention is very high, entire picture can be kept clear during zoom, and projected picture compares
Degree is high.
3, the present invention is in same projector distance, and clarity can remain unchanged at high operating temperatures, without focusing.
【Description of the drawings】
Fig. 1 is schematic diagram of the present invention.
【Specific implementation mode】
The invention will be further described below in conjunction with the accompanying drawings：
A kind of optical system, including luminescence chip 100,100 side of luminescence chip be equipped with it is opposite its fixed the
One lens group 10 is equipped with energy relative luminous chip 100 and moves and complete between first lens group 10 and luminescence chip 100
Second lens group 20 of projection optical system focusing, is equipped with energy successively between second lens group 20 and luminescence chip 100
The movement of relative luminous chip 100 simultaneously and complete the third lens group 30 of projection optical system zoom, diaphragm 200, the 4th lens
Group 40 and the 5th lens group 50, wherein the focal power φ of first lens group 101It is negative, described the second lens group 20
Focal power φ2It is the focal power φ of negative, described the third lens group 303For just, the focal power of the 4th lens group 40
φ4For just, the focal power φ of the 5th lens group 505For just.The third lens group 30, the 4th lens group 40 and the 5th lens
Group 50 is positive lens groups, and using the third lens group 30,50 synchronization-moving side of the 4th lens group 40 and the 5th lens group
Formula carries out zoom so that projection optical system the third lens group 30, the 4th lens group 40, the 5th lens group 50 during zoom
Whole focal plane position realizes that image planes are not moved on the conjugate position of 20 whole group of the first lens group 10 and the second lens group
It is dynamic so that it is clear that whole projection image can be realized without manual focus during zoom in projection optical system.Second lens
Group 20 is negative lens group, offsets the conjugate distance variable quantity generated in microspur and infinite point by image planes, realizes image planes compensation, makes throwing
It is clear enough to penetrate picture, realization can clearly be projected in entire zoom process within the scope of from microspur to infinity.
It is fixed using 10 relative luminous chip 100 of the first lens group when design, and the second lens group 20 can be first thoroughly
Relative luminous chip 100 moves between microscope group 10 and the third lens group 30, while the focal power φ of the first lens group 101With second
The focal power φ of lens group 202It is negative, to ensure that the light of large angle incidence can enter subsequent lens group, makes
The focal plane position for obtaining entire projection optical system moves backward, and smaller overall length is realized, to make projection optical system volume
It is small and compact.
The focal power φ of first lens group 101Meet：-0.07≤φ1≤-0.03；Second lens group 20
Focal power φ2Meet：-0.03≤φ2≤-0.01；The focal power φ of the third lens group 303Meet：0.02≤φ3
≤0.05；The focal power φ of 4th lens group 404Meet：0.01≤φ4≤0.04；5th lens group 50
Focal power φ5Meet：0.02≤φ5≤0.04.When the first lens group 10, the second lens group 20, the third lens group the 30, the 4th are saturating
The focal power φ of microscope group 40 and the 5th lens group 501、φ2、φ3、φ4And φ5It, can be significantly when meeting the above expression formula respectively
Improve the optical property of projection optical system.
First lens group 10 include the first eyeglass 1 and be located between the first eyeglass 1 and luminescence chip 100 second
Eyeglass 2；Second lens group 20 includes third eyeglass 3；The third lens group 30 includes the 4th eyeglass 4；Described
4th lens group 40 includes the 5th eyeglass 5；5th lens group 50 includes from the first lens group 10 to 100 side of luminescence chip
To the 6th eyeglass 6, the 7th eyeglass 7, the 8th eyeglass 8 and the 9th eyeglass 9 set gradually.
Second eyeglass 2 is plastic aspheric lenes, and the 5th eyeglass 5 and the 9th eyeglass 9 are that glass is non-
Spheric glass, first eyeglass 1, third eyeglass 3, the 4th eyeglass 4, the 6th eyeglass 6, the 7th eyeglass 7, the 8th eyeglass 8 are
For glass spherical lens.The use of second eyeglass 2 is aspherical, can correct the coma of incident ray, enable the bore of the first eyeglass 1
It is enough to reduce, smaller outer diameter is realized, to realize small size；Diaphragm 200 and the 4th lens group 40 use synchronization-moving mode,
And the 4th eyeglass 4 uses glass spherical lens, and bigbore ray aberration is made to be corrected, and realizes compared with large aperture.5th mirror
The use of piece 5 is aspherical, can correct the spherical aberration and diaphragm coma of heavy caliber incident ray, so that following lenses group is undertaken smaller
Aberration residual volume.5th lens group 50 is using the 6th eyeglass 6 and this balsaming lens group of the 7th eyeglass 7 and the 8th eyeglass 8 and the
This two panels simple lens cooperation of nine eyeglasses 9, and the cemented surface of balsaming lens group bends towards diaphragm 200, makes bigbore ray aberration
It can further be corrected, while the 9th eyeglass 9 uses aspherical, the residual aberration that projection optical system is generated by angle,
So that periphery resolving power improves, and then keep entire projection optical system aberration small, high resolution, projection image is clear.5th mirror
Piece 5 uses Glass aspheric, reduces focus drifting caused by high temperature, the 9th eyeglass 9 at the diaphragm 200 and uses Glass aspheric,
The influence of group high temperature focus point position after reducing caused by luminescence chip 100, while preceding group lens are compensated caused by temperature
Focus drifting amount makes entire projection optical system realize that image planes compensate at high operating temperatures, and the not empty coke of high temperature realizes that high temperature is total
It is burnt.
The aspherical surface shape of second eyeglass 2, the 5th eyeglass 5 and the 9th eyeglass 9 meets following equation：
In formula, parameter c is the curvature corresponding to radius, and y is radial coordinate, unit and length of lens unit phase
Together, k is circular cone whose conic coefficient；When k-factor is less than -1, the face shape curve of lens is hyperbola, when k-factor is equal to -1
When, the face shape curve of lens is parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, works as k-factor
When equal to 0, the face shape curve of lens is circle, and when k-factor is more than 0, the face shape curve of lens is oblateness；a1To a8Respectively
Indicate asphericity coefficient.
Following case is the actual design parameter of 1.2 times of Zooming-projection camera lens：
The coefficient of first face S3 of the second lens 2 is：
k：0.9655508
a1：0
a2：0.00016113012
a3：-1.1121334e-006
a4：4.6316682e-009
a5：2.3580794e-012
a6：-4.100098e-014
a7：-5.3695792e-016
a8：1.0863362e-018.
The coefficient of second face S4 of the second lens 2 is：
k：1.043183
a1：0
a2：0.00012145431
a3：-1.2901404e-006
a4：-2.2674029e-009
a5：5.2804281e-011
a6：-4.1924371e-014
a7：-5.4028716e-015
a8：2.0818976e-017.
The coefficient of first face S9 of the 5th lens 5 is：
k：-94.51348
a1：0
a2：-1.3090723e-006
a3：-4.393733e-007
a4：-3.4709789e-009
a5：3.7508959e-012
a6：3.1684678e-013
a7：-4.8775678e-015
a8：-4.8224638e-018.
The coefficient of second face S10 of the 5th lens 5 is：
k：1.673698
a1：0
a2：-2.0217113e-005
a3：-2.1630279e-007
a4：-5.3141003e-010
a5：-1.5557725e-011
a6：-7.8751681e-014
a7：2.2996132e-015
a8：-1.8434583e-017.
The coefficient of first face S16 of the 9th lens 9 is：
k：83.98607
a1：0
a2：-2.1208048e-005
a3：-1.8568486e-007
a4：2.0493656e-009
a5：-1.5488894e-011
a6：4.8998077e-014
a7：-5.1341938e-017
a8：7867813e-020.
The coefficient of second face S17 of the 9th lens 9 is：
k：-9.692794
a1：0
a2：-0.00010128489
a3：6.943532e-007
a4：-5.3466646e-009
a5：3.3159121e-011
a6：-1.5293411e-013
a7：3.7363546e-016
a8：-2.2500886e-019.
The projection scope of 1.2 times of Zooming-projection camera lens is 0.5m to infinite point, when 1.2 times of Zooming-projection camera lens are focused,
Second lens group, 20 10 moving range of opposite first lens group is 6.4~7.0mm, and in focusing, the third lens group the 30, the 4th is saturating
Microscope group 40 and the 5th lens group 50 remain stationary.When the projection distance of 1.2 times of Zooming-projection camera lens is set as 1.35m,
Zoom movement interval between each lens group is as follows：It is divided between second lens group 20 and the third lens group 30
3.53~6.86mm, between the third lens group 30 and the 4th lens group 40 between be divided into 13.72~16.63mm, the 4th lens group
40 and the 5th between lens group 50 between be divided into 1.49~6.05mm.
Claims (2)
1. a kind of optical system, it is characterised in that：Thoroughly by luminescence chip (100), diaphragm (200), the first lens group (10), second
Microscope group (20), the third lens group (30), the 4th lens group (40), the 5th lens group (50) and prism (60) composition, described the
One lens group (10) relative luminous chip (100) is fixed, and second lens group (20) is located at the first lens group (10) and hair
Between optical chip (100) and energy relative luminous chip (100) moves and completes projection optical system focusing, the third lens
Group (30), diaphragm (200), the 4th lens group (40) and the 5th lens group (50) are successively set on the second lens group (20) and shine
Between chip (100) and relative luminous chip (100) it can move simultaneously and complete projection optical system zoom, the prism
(60) it is arranged between the 5th lens group (50) and luminescence chip (100), wherein the focal power of first lens group (10)
φ1Meet：-0.07≤φ1≤ -0.03, the focal power φ of second lens group (20)2Meet：-0.03≤φ2≤-
0.01, the focal power φ of the third lens group (30)3Meet：0.02≤φ3≤ 0.05, the 4th lens group (40)
Focal power φ4Meet：0.01≤φ4≤ 0.04, the focal power φ of the 5th lens group (50)5Meet：0.02≤φ5
≤ 0.04, first lens group (10) is by the first eyeglass (1) and is located between the first eyeglass (1) and luminescence chip (100)
The second eyeglass (2) composition；Second lens group (20) is made of third eyeglass (3)；The third lens group (30)
It is made of the 4th eyeglass (4)；4th lens group (40) is made of the 5th eyeglass (5)；5th lens group (50)
By the 6th eyeglass (6), the 7th eyeglass (7), the 8th mirror set gradually from the first lens group (10) to luminescence chip (100) direction
Piece (8) and the 9th eyeglass (9) composition, second eyeglass (2) be plastic aspheric lenes, the 5th eyeglass (5) and
9th eyeglass (9) is Glass aspheric eyeglass, first eyeglass (1), third eyeglass (3), the 4th eyeglass (4), the 6th
Eyeglass (6), the 7th eyeglass (7), the 8th eyeglass (8) are glass spherical lens, the 6th eyeglass (6) and the 7th eyeglass
(7) it is the cemented doublet group being bonded together；The projection scope of the optical system is 0.5m to infinite point, the light
When system is focused, the second lens group (20) is 6.4~7.0mm with respect to the first lens group (10) moving range, in focusing, the
Three lens groups (30), the 4th lens group (40) and the 5th lens group (50) remain stationary；When the projection of the optical system
When distance is set as 1.35m, the zoom movement interval between each lens group is as follows：Second lens group (20) and third are saturating
3.53~6.86mm is divided between microscope group (30), between the third lens group (30) and the 4th lens group (40) between be divided into
13.72~16.63mm, between the 4th lens group (40) and the 5th lens group (50) between be divided into 1.49~6.05mm；Also, institute
The Optical System Design parameter such as following table stated：
。
2. optical system according to claim 1, it is characterised in that：Second eyeglass (2), the 5th eyeglass (5) and
The aspherical surface shape of 9th eyeglass (9) meets following equation：
In formula, parameter c is the curvature corresponding to radius, and y is radial coordinate, and unit is identical with length of lens unit, and k is
Circular cone whose conic coefficient；When k-factor is less than -1, the face shape curve of lens is hyperbola, when k-factor is equal to -1, lens
Face shape curve be parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, when k-factor is equal to 0
When, the face shape curve of lens is circle, and when k-factor is more than 0, the face shape curve of lens is oblateness；a1To a8It indicates respectively non-
Asphere coefficient.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610767996.8A CN106199937B (en) | 2016-08-30 | 2016-08-30 | A kind of optical system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610767996.8A CN106199937B (en) | 2016-08-30 | 2016-08-30 | A kind of optical system |
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| CN106199937A CN106199937A (en) | 2016-12-07 |
| CN106199937B true CN106199937B (en) | 2018-08-03 |
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| CN113253414B (en) * | 2021-06-29 | 2021-09-28 | 成都极米科技股份有限公司 | Projection optical system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1529193A (en) * | 2003-10-15 | 2004-09-15 | 杭州华光光电有限公司 | Liquid-crystal projection varifocus projection objective |
| JP2007140429A (en) * | 2005-10-18 | 2007-06-07 | Casio Comput Co Ltd | Zoom lens |
| CN103631006A (en) * | 2012-12-28 | 2014-03-12 | 利达光电股份有限公司 | Large zoom ratio continuous zooming projection lens |
| CN103913829A (en) * | 2012-12-28 | 2014-07-09 | 株式会社理光 | Projection zoom lens |
| CN203930190U (en) * | 2011-10-20 | 2014-11-05 | 富士胶片株式会社 | Zoom lens and projection-type display apparatus for projection |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8699139B2 (en) * | 2011-05-30 | 2014-04-15 | Konica Minolta Advanced Layers, Inc. | Variable-focal-length projection lens system and projection apparatus |
-
2016
- 2016-08-30 CN CN201610767996.8A patent/CN106199937B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1529193A (en) * | 2003-10-15 | 2004-09-15 | 杭州华光光电有限公司 | Liquid-crystal projection varifocus projection objective |
| JP2007140429A (en) * | 2005-10-18 | 2007-06-07 | Casio Comput Co Ltd | Zoom lens |
| CN203930190U (en) * | 2011-10-20 | 2014-11-05 | 富士胶片株式会社 | Zoom lens and projection-type display apparatus for projection |
| CN103631006A (en) * | 2012-12-28 | 2014-03-12 | 利达光电股份有限公司 | Large zoom ratio continuous zooming projection lens |
| CN103913829A (en) * | 2012-12-28 | 2014-07-09 | 株式会社理光 | Projection zoom lens |
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