CN108303787A - A kind of big image planes projection optical system of large aperture - Google Patents
A kind of big image planes projection optical system of large aperture Download PDFInfo
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- CN108303787A CN108303787A CN201810289851.0A CN201810289851A CN108303787A CN 108303787 A CN108303787 A CN 108303787A CN 201810289851 A CN201810289851 A CN 201810289851A CN 108303787 A CN108303787 A CN 108303787A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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Abstract
The invention discloses a kind of big image planes projection optical systems of large aperture, are disposed with from projection surface to luminescence chip：First lens are non-spherical lens；Second lens are spherical lens；The third lens are spherical lens；4th lens are spherical lens；5th lens are spherical lens；6th lens are spherical lens；Diaphragm；7th lens are spherical lens；8th lens are spherical lens, and focal power is negative；9th lens are spherical lens, and focal power is just；Tenth lens are spherical lens, and focal power is negative；11st lens are non-spherical lens, and focal power is just；12nd lens are spherical lens, and focal power is just；Prism.The configuration of the present invention is simple makes the optical projection system in the case where having used less aspherical by reasonable distribution lens powers, while having high-resolution drop shadow effect, greatly reduces the cost of camera lens.
Description
【Technical field】
The present invention relates to a kind of short focus projection optical system, especially a kind of big image planes high-resolution projection optics of large aperture
System.
【Background technology】
A kind of projection of so-called short focus projector, i.e. the distance between projector to screen and the ratio very little of screen size
Instrument can project the picture of bigger in shorter distance.
Mainly this function is realized by two kinds of technology types, one is reflection type projection technology is used, that is, project at present
System projects image on the mirror, is projected on projection screen by speculum.This projection pattern wants technology
It asks very high, is easy the slight error because of speculum, cause the image cast out to deform and brightness disproportionation, it is difficult to meet
The requirement of batch production.Another kind is to be realized using direct projection type.As projector's generally existing currently on the market
Disadvantage：1, the aperture of camera lens is smaller, and leading to the image cast out, picture brightness is low under a bright ambient environment, influences using effect
Fruit；2, the larger projection lens of small part aperture causes price high due to the use of more spherical surface or Glass aspheric eyeglass
It is expensive；3, also there is small part camera lens to reduce cost, sacrifice part resolving power, or aspherical using plastic cement, but due to projector
Calorific value it is big, this kind of camera lens tends to empty burnt phenomenon occur because of high temperature, influences using effect.
Therefore, the present invention is based on above deficiency and generates.
【Invention content】
The technical problem to be solved in the present invention is to provide a kind of simple in structure, aperture is big, small, and low cost is differentiated
The projection optical system that rate is high and high temperature is confocal.
In order to solve the above technical problems, present invention employs following technical proposals：
A kind of big image planes projection optical system of large aperture, it is characterised in that be disposed with from projection surface to luminescence chip：
First lens, first lens are non-spherical lens, and focal power is negative；
Second lens, second lens are spherical lens, and focal power is negative；
The third lens, the third lens are spherical lens, and focal power is negative；
4th lens, the 4th lens are spherical lens, and focal power is just；
5th lens, the 5th lens are spherical lens, and focal power is just；
6th lens, the 6th lens are spherical lens, and focal power is just；
Diaphragm；
7th lens, the 7th lens are spherical lens；And focal power is just；
8th lens, the 8th lens are spherical lens；And focal power is negative；
9th lens, the 9th lens are spherical lens；And focal power is just；
And the 8th lens and the 9th lens be bonding eyeglass；
Tenth lens, the tenth lens are spherical lens；And focal power is negative；
11st lens, the 11st lens are non-spherical lens；And focal power is just；
12nd lens, the 12nd lens are spherical lens；And focal power is just；
Prism.
A kind of big image planes projection optical system of large aperture as described above, which is characterized in that second lens, third
Lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens, the 9th lens, the tenth lens, the 11st are thoroughly
Mirror and the 12nd lens use glass material, first lens to use plastic material.
A kind of big image planes projection optical system of large aperture as described above, which is characterized in that the light focus of first lens
Degree is φ1, second power of lens is φ2, the focal power of the third lens is φ3, the light focus of the 4th lens
Degree is φ4, the 5th power of lens is φ5, the 6th power of lens is φ6, the 7th power of lens is φ7, the 8th
Power of lens is φ8, the 9th power of lens is φ9, the tenth power of lens is φ10, the light of the 11st lens
Focal power is φ11, the 12nd power of lens is φ12, meet： -0.02<φ1<- 0.01, -0.03<φ2<- 0.02, -0.04
<φ3<- 0.03,0<φ4<0.01,0.02<φ5<0.03,0.01<φ6<0.02,0.015<φ7<0.025, -0.01<φ8<0,
0.0<φ9<0.01, -0.03<φ10<- 0.02,0.03<φ11<0.04,0.025<φ12<0.035。
A kind of big image planes projection optical system of large aperture as described above, which is characterized in that second lens, third
Lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens, the 9th lens, the tenth lens and the 12nd are thoroughly
Mirror is optical spherical surface glass, and first lens are plastic cement aspherical lens, and the 11st lens are Glass aspheric eyeglass.
A kind of big image planes projection optical system of large aperture as described above, which is characterized in that first lens and the tenth
The aspherical surface shape of one lens meets following equation：7th power of lens is φ7,
In formula, parameter c is the curvature corresponding to radius, its unit is identical with length of lens unit for radial coordinate by y,
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, thoroughly
The face shape curve of mirror is 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 each
Coefficient corresponding to radial coordinate.
Compared with prior art, the big image planes projection optical system of a kind of large aperture of the invention, has reached following effect：
1, aperture of the present invention is big, can support the aperture of F1.6.
2, the configuration of the present invention is simple makes the optical projection system use less aspheric by reasonable distribution lens powers
In the case of face, while there is high-resolution drop shadow effect, greatly reduces the cost of camera lens.
3, the present invention is by rationally using plastic cement aspherical, while being used in mixed way glass lens and plastic lens, is reducing
While cost, and realize not empty coke under the condition of high temperature.
【Description of the drawings】
The specific implementation mode of the present invention is described in further detail below in conjunction with the accompanying drawings, wherein：
Fig. 1 is schematic diagram of the present invention；
Description of the drawings：1, the first lens；2, the second lens；3, the third lens；4, the 4th lens；5, the 5th lens；6,
Six lens；7, the 7th lens；8, the 8th lens；9, the 9th lens；10, the tenth lens；11, the 11st lens；12, the 12nd thoroughly
Mirror；13, prism；14, luminescence chip；15, diaphragm.
【Specific implementation mode】
It elaborates below in conjunction with the accompanying drawings to embodiments of the present invention.
As shown in Figure 1, a kind of large aperture projection optical system, 14 are disposed with from projection surface to luminescence chip：
First lens 1, first lens 1 are non-spherical lens, and focal power is negative；
Second lens 2, second lens 2 are spherical lens, and focal power is negative；
The third lens 3, the third lens 3 are spherical lens, and focal power is negative；
4th lens 4, the 4th lens 4 are spherical lens, and focal power is just；
5th lens 5, the 5th lens 5 are spherical lens, and focal power is just；
6th lens 6, the 6th lens 6 are spherical lens, and focal power is just；
Diaphragm 15
7th lens 7, the 7th lens 7 are spherical lens；And focal power is just；
8th lens 8, the 8th lens 8 are spherical lens；And focal power is negative；
9th lens 9, the 9th lens 9 are spherical lens；And focal power is just；
And the 8th lens and the 9th lens be bonding eyeglass；
Tenth lens 10, the tenth lens 10 are spherical lens；And focal power is negative；
11st lens 11, the 11st lens 11 are non-spherical lens；And focal power is just；
12nd lens 12, the 12nd lens 12 are spherical lens；And focal power is just；
Prism 13.
As shown in Figure 1, in the present embodiment, second lens 2, the third lens 3, the 4th lens 4, the 5th lens 5,
6th lens 6, the 7th lens 7, the 8th lens 8, the 9th lens 9, the tenth lens 10, the 11st lens 11 and the 12nd lens 12
Using glass material, first lens 1 use plastic material.The present invention is made using the mixing of glass lens and plastic lens
With realizing not empty coke under the condition of high temperature.
As shown in Figure 1, the focal power of first lens 1 is φ in the present embodiment1, the light focus of second lens 2
Degree is φ2, the focal power of the third lens 3 is φ3, the focal power of the 4th lens 4 is φ4, the light focus of the 5th lens 5
Degree is φ5, the focal power of the 6th lens 6 is φ6, the focal power of the 7th lens 7 is φ7, the focal power of the 8th lens 8 is φ8,
The focal power of 9th lens 9 is φ9, the focal power of the tenth lens 10 is φ10, the focal power of the 11st lens 11 is φ11, the tenth
The focal power of two lens 12 is φ12, meet： -0.02<φ1<- 0.01, -0.03<φ2<- 0.02, -0.04<φ3<- 0.03,0<
φ4<0.01,0.02<φ5<0.03,0.01<φ6<0.02,0.015<φ7<0.025, -0.01<φ8<0,0.0< φ9<
0.01, -0.03<φ10<- 0.02,0.03<φ11<0.04,0.025<φ12<0.035。
In the present embodiment, Combination Design parameters size is optimized to optical projection system by optical design software, is closed
Reason distributes each power of lens, and deflection angle of the light on each lens is made to be reasonably distributed, and is using less aspherical feelings
Under condition, have under optimal imaging effect, while ensureing to possess good craftsmanship, meets the requirement of product mass production.
In the present embodiment, the first meniscus shaped lens 1 is non-spherical lens, and the first meniscus shaped lens 1 is that plastic cement material is saturating
Mirror, focal power are negative, when realizing light wide-angle deflection, can correct distortion and the astigmatism of high angle scattered light simultaneously, make entrance
The light organized afterwards has smaller angle and residual aberration.11st lens 11 are glass aspheric lenses, can be to high light line
The aberrations such as spherical aberration, coma be corrected, coordinate the use of the first lens 1, to realize under large aperture and more excellent imaging effect
Fruit.
First meniscus shaped lens 1 is plastic aspherical element, focal power φ4It is negative, first aspherical greatly using plastic cement
The cost for reducing system, first plastic cement aspherical lens bending direction is towards chip；11st lens are Glass aspheric,
Lens bending direction deviates from chip, opposite with the first lens；Ensure, because projector uses for a long time, to cause camera lens internal temperature
In the case of raised, the first lens plastic cement aspheric superficial expansivity P1, eyeglass temperature T1, the 11st lens glass aspheric surface expansion
FACTOR P11, eyeglass temperature T11, meet P1*T1+P11*T11The relational expression of ≈ 0.Pass through the aspherical knot with Glass aspheric of plastic cement
It closes and uses, solve the empty burnt phenomenon of system, it is ensured that under the condition of high temperature, optical system not defocus.
As shown in Figure 1, in the present embodiment, second lens 1, the third lens 3, the 4th lens 4, the 5th lens 5,
6th lens 6, the 7th lens 7, the 8th lens 8, the 9th lens 9, the tenth lens 10 and the 12nd lens 12 are optical spherical surface glass
Glass, first lens 1 are plastic cement aspherical lens, and the 11st lens 11 are Glass aspheric eyeglass.
As shown in Figure 1, in the present embodiment, the aspherical surface shape of first lens, 1 and the 11st lens 11
Meet following equation：
In formula, parameter c is the curvature corresponding to radius, its unit is identical with length of lens unit for radial coordinate by y,
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, thoroughly
The face shape curve of mirror is 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 each
Coefficient corresponding to radial coordinate.
Following case is that F1.6 projects the actual design parameter of the projection lens of ratio using distance 0.5-5m：
First lens, 1 first face S1 coefficients are：
k：-768
a1：0
a2：0.00011485935
a3：-5.3053334e-007
a4：2.126744e-009
a5：-5.4787393e-012
a6：8.0470803e-015
a7：-4.9662071e-018
First lens, 1 second face S2 coefficients are：
k：22.275
a1：0
a2：0.00014239041
a3：-4.6197932e-007
a4：5.2022001e-010
a5：1.2998783e-011
a6：-7.5810064e-014
a7：1.4883303e-016
11st lens, 11 one side S21 numbers are：
k：-565.9319
a1：0
a2：-4.6842153e-006
a3：1.3583932e-008
a4：2.96366079486753e-012
a5：2.35668648024052e-015
a6：-1.7709563837241e-019
a7：-6.05918030192083e-022
11st lens, 11 2 face S22 numbers are：
k：-0.4040741
a1：0
a2：4.90490480030574e-007
a3：-2.05760498407608e-010
a4：2.99679825125034e-014
a5：5.55711304020551e-018
a6：-2.86845642405709e-021
a7：2.91053534222281e-025 .
Claims (5)
1. a kind of big image planes projection optical system of large aperture, it is characterised in that be disposed with from projection surface to luminescence chip：
First lens, first lens are non-spherical lens, and focal power is negative；
Second lens, second lens are spherical lens, and focal power is negative；
The third lens, the third lens are spherical lens, and focal power is negative；
4th lens, the 4th lens are spherical lens, and focal power is just；
5th lens, the 5th lens are spherical lens, and focal power is just；
6th lens, the 6th lens are spherical lens, and focal power is just；
Diaphragm；
7th lens, the 7th lens are spherical lens；And focal power is just；
8th lens, the 8th lens are spherical lens；And focal power is negative；
9th lens, the 9th lens are spherical lens；And focal power is just；
And the 8th lens and the 9th lens be bonding eyeglass；
Tenth lens, the tenth lens are spherical lens；And focal power is negative；
11st lens, the 11st lens are non-spherical lens；And focal power is just；
12nd lens, the 12nd lens are spherical lens；And focal power is just；
Prism.
2. the big image planes projection optical system of a kind of large aperture according to claim 1, which is characterized in that described second is thoroughly
Mirror, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens, the 9th lens, the tenth lens,
11 lens and the 12nd lens use glass material, first lens to use plastic material.
3. the big image planes projection optical system of a kind of large aperture according to claim 1, which is characterized in that first lens
Focal power be φ1, second power of lens is φ2, the focal power of the third lens is φ3, the 4th lens
Focal power be φ4, the 5th power of lens is φ5, the 6th power of lens is φ6, the 7th power of lens is
φ7, the 8th power of lens is φ8, the 9th power of lens is φ9, the tenth power of lens is φ10, the 11st thoroughly
The focal power of mirror is φ11, the 12nd power of lens is φ12, meet：-0.02<φ1<- 0.01, -0.03<φ2<-
0.02, -0.04<φ3<- 0.03,0<φ4<0.01,0.02<φ5<0.03,0.01<φ6<0.02,0.015<φ7<0.025 ,-
0.01<φ8<0,0.0<φ9<0.01, -0.03<φ10<- 0.02,0.03<φ11<0.04,0.025<φ12<0.035。
4. the big image planes projection optical system of a kind of large aperture according to claim 3, which is characterized in that described second is thoroughly
Mirror, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens, the 9th lens, the tenth lens and
12nd lens are optical spherical surface glass, and first lens are plastic cement aspherical lens, and the 11st lens are that glass is non-
Spheric glass.
5. the big image planes projection optical system of a kind of large aperture according to claim 4, which is characterized in that first lens
Meet following equation with the aspherical surface shape of the 11st lens：7th power of lens is φ7,
In formula, parameter c is the curvature corresponding to radius, its unit is identical with length of lens unit for radial coordinate by y, 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 each
Coefficient corresponding to radial coordinate.
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| CN201810289851.0A CN108303787A (en) | 2018-04-03 | 2018-04-03 | A kind of big image planes projection optical system of large aperture |
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| CN201810289851.0A CN108303787A (en) | 2018-04-03 | 2018-04-03 | A kind of big image planes projection optical system of large aperture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109298512A (en) * | 2018-12-04 | 2019-02-01 | 湖州清维电子科技有限公司 | A kind of short focus engineering projection lens |
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2018
- 2018-04-03 CN CN201810289851.0A patent/CN108303787A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109298512A (en) * | 2018-12-04 | 2019-02-01 | 湖州清维电子科技有限公司 | A kind of short focus engineering projection lens |
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