CN209070202U - A kind of short focus engineering projection lens - Google Patents
A kind of short focus engineering projection lens Download PDFInfo
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- CN209070202U CN209070202U CN201822019586.2U CN201822019586U CN209070202U CN 209070202 U CN209070202 U CN 209070202U CN 201822019586 U CN201822019586 U CN 201822019586U CN 209070202 U CN209070202 U CN 209070202U
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- lens
- positive light
- light coke
- short focus
- negative power
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Abstract
A kind of short focus engineering projection lens, belongs to projection lens technical field.Engineering projection lens sequentially includes: the first lens with positive light coke by object side to image side along optical axis, second lens, the third lens with negative power, the 4th lens with negative power, the 5th lens with negative power, the 6th lens with positive light coke, the 7th lens with negative power, the 8th lens with positive light coke, the 9th lens with negative power, the tenth lens with positive light coke, the 11st lens with positive light coke, the 12nd lens with positive light coke；First lens, the third lens to the 12nd lens are spherical lens；Second lens are non-spherical lens；Diaphragm is equipped between 7th lens and the 8th lens.The utility model can project biggish projected picture in shorter projector distance.
Description
Technical field
The utility model belongs to projection lens technical field more particularly to a kind of short focus engineering projection lens.
Background technique
Classify by image display, in terms of the image display technology of pre-projecting type projector at present, be broadly divided into 3LCD, DLP,
The big technical field of LCOS tri-.3LCD projector lens generally use telecentric optics to design, and are divided into two ways realization: the first
Be be composed using ten or so various spherical lenses, its main feature is that: projector distance is remote, about 3 meters or so projection about
70 inches of pictures；Due to using spherical lens, glass common grinding mode can be used and process.It is for second the base at the first
Plastic aspheric lens are changed to by least two therein to three pieces spherical lens on plinth, its main feature is that: projector distance can be shortened,
Identical about 70 inches of pictures can be also projected at 1 meter or so to reach projector distance；It is general since eyeglass is aspheric design
Logical lapping mode is difficult to make, therefore can generally be fabricated using plastic shaping mode.Since second of camera lens uses plastics
The control of molding mode, aspherical face type becomes a difficult point, therefore the difficulty of processing that can reach high-resolution camera lens is big, opens
It is long to send out the period, and cost is high.
Utility model patent CN203069866U discloses a kind of project and compares the short focus projection lens structure for being 0.65, and has
It includes seven eyeglasses being arranged successively that body, which discloses lens construction, and it is saturating to be followed successively by preceding group of first negative meniscus sized non-spherical resin
Mirror, preceding group second positive falcate sized non-spherical resin lens, organizing third and fourth piece afterwards is balsaming lens, and rear group the 5th is biconvex
Lens.Although and utility model can obtain biggish projection ratio, can be projected out larger image, however require that non-using two panels
Spherical lens, processing are not easy, and difficulty is big, higher cost.
Utility model content
In view of the problems of the existing technology, it is remote to propose a kind of solution projector distance, camera lens difficult processing for the utility model,
Period is long, the short focus engineering projection lens of problem at high cost.
The utility model has the technical scheme that
A kind of short focus engineering projection lens of the utility model by object side to image side sequentially includes: with positive light focus along optical axis
First lens of degree, the second lens, the third lens with negative power, the 4th lens with negative power have negative light
5th lens of focal power, the 6th lens with positive light coke, the 7th lens with negative power, the with positive light coke
Eight lens, the 9th lens with negative power, the tenth lens with positive light coke, the with positive light coke the 11st is saturating
Mirror, the 12nd lens with positive light coke；
It is first lens, the third lens, the 4th lens, the 5th lens, the 6th lens, described
7th lens, the 8th lens, the 9th lens, the tenth lens, the 11st lens, the 12nd lens
It is spherical lens；
Second lens are non-spherical lens；
Diaphragm is equipped between 7th lens and the 8th lens.
Preferably, first lens, the third lens, the 4th lens, the 5th lens, the described 6th
It is lens, the 7th lens, the 8th lens, the 9th lens, the tenth lens, the 11st lens, described
12nd lens are glass spherical lens；Second lens are plastic aspheric lenes.
Preferably, first lens, second lens, the third lens, the 4th lens, the described 5th
Lens, the 7th lens, all have spacing between any two adjacent lens in the 8th lens at the 6th lens；Institute
Stating has spacing between the tenth lens and the 11st lens；8th lens, the 9th lens, the tenth lens
Three is successively close to be arranged；11st lens are close to setting with the 12nd lens.
Preferably, the 8th lens, the 9th lens, the tenth lens are three pieces cemented doublet group；It is described
11st lens and the 12nd lens are two panels cemented doublet group.
Preferably, a kind of short focus engineering projection lens further includes the lens construction group for assembling above-mentioned all lens
Part, the lens construction component are aluminum design component.
Preferably, it is 0.6 ± 0.05 that the projection of the projection lens, which is compared,.
The utility model has the following beneficial effects:
A kind of short focus engineering projection lens of the utility model, using a piece of plastic aspheric lenes and ten a piece of glass spherical surfaces
Lens, most of lens use glass spherical lens easy to process, whole camera lens lower cost；And it can be in shorter projection
Distance projects biggish projected picture.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of short focus engineering projection lens of the utility model.
Specific embodiment
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
Referring to Fig. 1, a kind of short focus engineering projection lens of the utility model includes 12 lens, lens construction component.Institute
State 12 lens by lens construction component assemble after along optical axis by object side to image side be sequentially with positive light coke first
Lens 1, the second lens 2, the third lens 3 with negative power, the 4th lens 4 with negative power have negative power
The 5th lens 5, the 6th lens 6 with positive light coke, the 7th lens 7 with negative power, the with positive light coke
Eight lens 8, the 9th lens 9 with negative power, the tenth lens 10 with positive light coke, the with positive light coke the 11st
Lens 11, the 12nd lens 12 with positive light coke.Diaphragm is equipped between 7th lens 7 and the 8th lens 8.It is logical
The appropriate selection to stop position is crossed, can effectively correct aberration related with diaphragm (for example, coma, astigmatism, distortion and axis
To color difference), to improve the image quality of camera lens.Lens construction component includes the first lens barrel 14 and the second lens barrel 15.Described first
Lens barrel 14 and second lens barrel 15 are by fastener 13, as screw is locked together.First lens 1, described second are thoroughly
Mirror 2, the third lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6, the 7th lens 7 assembly
In first lens barrel 14；8th lens 8, the 9th lens 9, the tenth lens 10, the 11st lens
11, the 12nd lens 12 are assemblied in second lens barrel 15.The lens construction component further includes other structures part, such as
General knot can be selected for consolidating mounted lens in the structural member 16,17,18,19,20,21 of appended drawing reference in figure, the structural member
Component such as retainer ring fix lens in lens barrel, being not limited to other structures form.Aluminum design part can be used in above-mentioned structural member.This
Camera lens can be used whole group focusing mode and focus.
First lens 1, the third lens 3, the 4th lens 4, the 5th lens 5, the 6th lens
6, the 7th lens 7, the 8th lens 8, the 9th lens 9, the tenth lens 10, the 11st lens 11,
12nd lens 12 are spherical lens.Preferably, the spherical lens is all made of glass spherical lens.Glass grinding adds
Work convenience, low processing cost, it is suitable for mass production.Second lens 2 are non-spherical lens.The non-spherical lens reference
Following aspherical equation formulas design:
Wherein, Z be aspherical lens any point with optical axis direction to the distance of 0 tangent plane of lens, C is curvature, and Y is mirror
Piece height, K are circular cone coefficient, and A2 ~ A6 is respectively four ~ ten second order asphericity coefficients.Second lens 2 are preferably plastic cement aspheric
Face lens.It is convenient to be capable of processing in this way, and the resolution ratio according to the non-spherical lens of above-mentioned formula formation is higher.
First lens 1, second lens 2, the third lens 3, the 4th lens 4, the 5th lens
5, the 6th lens 6, the 7th lens 7, all have spacing between any two adjacent lens in the 8th lens 8.Institute
Stating has spacing between the tenth lens 10 and the 11st lens 11.8th lens 8, the 9th lens 9, described
Ten lens, 10 three is successively close to be arranged.11st lens 11 are close to setting with the 12nd lens 12.Preferably, institute
Stating the 8th lens 8, the 9th lens 9, the tenth lens 10 is three pieces cemented doublet group.11st lens 11 and institute
Stating the 12nd lens 12 is two panels cemented doublet group.The balsaming lens group is referred to as achromatic lens group, is by two
Single element lens are formed by gluing, improve many than simple lens performance in the performance of secondary color (white light) imaging.Achromatic lens
Group is glued together by the different eyeglass of two sheet materials, corrects the dispersion of glass.
Using above-mentioned projection lens, projecting ratio can reach 0.6, can float 5% up and down, that is to say, that projecting ratio can reach
To 0.55 ~ 0.65.
Fig. 1 shows the structural schematic diagram of short focus engineering projection lens.Using 0.67, " (WUXG) chip, projection ratio are
0.57~0.62。
Example 1:
Image spacing: 1195.2mm.Wherein, camera lens overall length 152.4mm is (i.e. from 1 appearance vertex of surface of the first lens to the tenth
Two lens, 12 appearance vertex of surface length).
Object plane spacing 1000mm(is i.e. from 1 appearance vertex of surface of the first lens to object plane distance).
Image planes spacing 42.8mm (i.e. from 12 appearance vertex of surface of the 12nd lens to image planes distance, the airspace containing 1.3mm+
The airspace 26mm K9 glass+15.5mm, being scaled full airspace distance is 33.94mm).
Image planes size 21.1mm, corresponding object plane is having a size of 2467.4mm, putting under the image spacer conditions as above announced
Big multiplying power is about 116.9 times, and half field-of-view's angle is about 50 °.
It should be understood by those skilled in the art that foregoing description and the embodiments of the present invention shown in the drawings are only used as
It illustrates and is not intended to limit the utility model.The purpose of this utility model completely effectively realizes.The function of the utility model
And structural principle shows and illustrates in embodiment, under without departing from the principle, the embodiments of the present invention can
To have any deformation or modification.
Claims (6)
1. a kind of short focus engineering projection lens, which is characterized in that along optical axis by object side to image side sequentially include: with positive light coke
The first lens, the second lens, with negative power the third lens, with negative power the 4th lens, have negative light focus
5th lens of degree, the 6th lens with positive light coke, the 7th lens with negative power, the with positive light coke the 8th
Lens, the 9th lens with negative power, the tenth lens with positive light coke, the 11st lens with positive light coke,
The 12nd lens with positive light coke；
First lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the described 7th
Lens, the 8th lens, the 9th lens, the tenth lens, the 11st lens, the 12nd lens are
Spherical lens；
Second lens are non-spherical lens；
Diaphragm is equipped between 7th lens and the 8th lens.
2. a kind of short focus engineering projection lens according to claim 1, which is characterized in that first lens, described
It is three lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, the 8th lens, described
9th lens, the tenth lens, the 11st lens, the 12nd lens are glass spherical lens；Described second
Lens are plastic aspheric lenes.
3. a kind of short focus engineering projection lens according to claim 1, which is characterized in that first lens, described
It is two lens, the third lens, the 4th lens, the 5th lens, the 6th lens, the 7th lens, described
Spacing is all had between any two adjacent lens in 8th lens；Between having between tenth lens and the 11st lens
Away from；8th lens, the 9th lens, the tenth lens three are successively close to be arranged；11st lens and institute
It states the 12nd lens and is close to setting.
4. a kind of short focus engineering projection lens according to claim 3, which is characterized in that the 8th lens, described
Nine lens, the tenth lens are three pieces cemented doublet group；11st lens and the 12nd lens are that two panels is glued
Lens set.
5. a kind of short focus engineering projection lens according to claim 1, which is characterized in that further include for assembling above-mentioned institute
There is the lens construction component of lens, the lens construction component is aluminum design component.
6. a kind of short focus engineering projection lens according to claim 1, which is characterized in that the projection ratio of the projection lens
It is 0.6 ± 0.05.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822019586.2U CN209070202U (en) | 2018-12-04 | 2018-12-04 | A kind of short focus engineering projection lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822019586.2U CN209070202U (en) | 2018-12-04 | 2018-12-04 | A kind of short focus engineering projection lens |
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| Publication Number | Publication Date |
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| CN209070202U true CN209070202U (en) | 2019-07-05 |
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| CN201822019586.2U Active CN209070202U (en) | 2018-12-04 | 2018-12-04 | A kind of short focus engineering projection lens |
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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
- 2018-12-04 CN CN201822019586.2U patent/CN209070202U/en active Active
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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