CN109100857A - A kind of low full HD projection lens that distorts of low F number - Google Patents
A kind of low full HD projection lens that distorts of low F number Download PDFInfo
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- CN109100857A CN109100857A CN201811105119.XA CN201811105119A CN109100857A CN 109100857 A CN109100857 A CN 109100857A CN 201811105119 A CN201811105119 A CN 201811105119A CN 109100857 A CN109100857 A CN 109100857A
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- projection
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- 230000005499 meniscus Effects 0.000 claims abstract description 32
- 230000003287 optical effect Effects 0.000 claims abstract description 8
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 3
- 238000009738 saturating Methods 0.000 claims description 2
- 238000005457 optimization Methods 0.000 description 5
- 230000004075 alteration Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 239000005357 flat glass Substances 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
Classifications
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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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- Optics & Photonics (AREA)
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Abstract
The present invention discloses a kind of low full HD projection lens that distorts of low F number, the focal length of the projection lens is between 8.5~9.5mm, F number is between 1.6~1.8, including several lens subassemblies being arranged with optical axis being set between perspective plane and dmd chip, the lens subassembly sequentially includes the first diverging meniscus lens, biconcave lens, the first convex lens, the second convex lens, the first cemented doublet, the second cemented doublet, third convex lens, the first positive meniscus lens from left to right；The projected light beam of the dmd chip modulation passes sequentially through the lens subassembly and is imaged on the projection surface.The present invention bears group eyeglass preceding using diaphragm as boundary, and positive eyeglass of organizing uses a piece of aspherical lens in camera lens negative lens group and positive lens groups, double aspheric lens designs make it possible to guarantee that MTF keeps high value while low F number rear respectively.Also has the characteristics that low distortion using double aspheric designs.
Description
Technical field
The invention belongs to the low full HD projection lens of distortion of photoelectricity projection art more particularly to a kind of low F number.
Background technique
The projector of higher pixel generally uses aspherical projection lens at present, and clarity and TV distortion require to compare appearance
Easily meet.General projection lens is just able to satisfy requirement using single aspherical lens.
General projection lens F number is between 2 to 2.5.And the low F number projection lens less than 1.8 is in use, is provided with more
High light utilization cooperates light source module, the brightness of projection lens projected picture is greatly improved.But low F number camera lens is more difficult to be set
Meter, especially low F number design can reduce MTF, the i.e. clarity of picture.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention is using diaphragm as boundary, bears group eyeglass preceding, and positive to organize eyeglass posterior anti-
Telephoto lens use a piece of aspherical lens in camera lens negative lens group and positive lens groups respectively, are come using double aspherical lens
Camera lens is designed, higher clarity is reached；It is designed using low F number, while guaranteeing that MTF keeps high value；Double aspheric designs
Also meet the specific demand of low distortion.
The present invention is the following technical schemes are provided: a kind of low full HD projection lens of distortion of low F number, including projection lens sheet
Body, the focal length of the projection lens is between 8.5~9.5mm, and for F number between 1.6~1.8, the projection lens includes setting
Several lens subassemblies being arranged with optical axis between perspective plane and dmd chip, the lens subassembly sequentially wrap from left to right
It is saturating to include the first diverging meniscus lens, biconcave lens, the first convex lens, the second convex lens, the first cemented doublet, second pair of gluing
Mirror, third convex lens, the first positive meniscus lens；The projected light beam of the dmd chip modulation passes sequentially through the lens subassembly
First positive meniscus lens, third convex lens, the second cemented doublet, the first cemented doublet, the second convex lens, the first convex lens
Mirror, biconcave lens and the first diverging meniscus lens are simultaneously imaged on the projection surface.
Preferably, the projection lens includes the prism group being set between DMD and the first positive meniscus lens.
Further, the projection lens also includes the diaphragm being placed between the second convex lens and the first cemented doublet
Face.
Further, first cemented doublet further includes close to the 4th convex lens of diaphragm face and close to second pair of glue
Close the first concavees lens of lens；Second cemented doublet further includes the second concavees lens of close first cemented doublet and leans on
5th convex lens of nearly third convex lens.
Further, the dmd chip is 0.65 inch, and resolution ratio is 1920 × 1080 or 0.67 inches, and resolution ratio is
One of 1920 × 1200.
Further, the focal length of first diverging meniscus lens is between -30mm and -60mm；The biconcave lens
Focal length is between -40mm and -20mm；The focal length of first convex lens is between 70mm and 90mm；Second convex lens
The focal length of mirror is between 85mm and 115mm；The focal length of first cemented doublet is between -70mm and -40mm；It is described
The focal length of second cemented doublet is between 120mm and 160mm；The focal length of the third convex lens between 25mm and 40mm it
Between；The focal length of first positive meniscus lens is between 90mm and 130mm.
Further, the refractive index of first diverging meniscus lens is between 1.50 and 1.60；The biconcave lens
Refractive index is between 1.65 and 1.75；The refractive index of first convex lens is between 1.65 and 1.75；Described second is convex
The refractive index of lens is between 1.70 and 1.80；In first cemented doublet, close to the folding of the 4th convex lens of diaphragm
Rate is penetrated between 1.55 and 1.65, the first concavees lens refractive index close to the second cemented doublet is between 1.85 and 1.2；
In second cemented doublet, close to the first cemented doublet the second concavees lens refractive index between 1.60 and 1.75 it
Between, the 5th convex lens refractive index close to third convex lens is between 1.45 and 1.55；The refractive index of the third convex lens
Between 1.55 and 1.65；The refractive index of first positive meniscus lens is between 1.60 and 1.75.
Further, first diverging meniscus lens and the first positive full moon lens or so two sides are aspherical.
The invention has the benefit that
1, using diaphragm as boundary, group eyeglass is born preceding, it is positive to organize the posterior retrofocus type object lens of eyeglass, phase is selected according to this configuration
The camera lens of nearly structure is initial configuration, changes chip size, passes through replacement increase and decrease glass material, focal length scaling and aberration control
Optimization design is finally reached the excellent projection lens design of image quality；
2, a piece of aspherical lens are used respectively in camera lens negative lens group and positive lens groups, reach higher clarity；Make
It is designed with low F number, while guaranteeing that MTF keeps high value；Double aspheric designs also meet the specific demand of low distortion；
3, the F number of the low full HD projection lens of distortion of low F number provided by the present application is 1.7, and 84 ° of field angle, distortion is less than
0.11%, focal length 9.2mm.This camera lens is that a structure is simple, full optical glass, the imaging object after cost control and optimization
Mirror；
4, it is based on optical imaging concept, structure is repeatedly carried out to projection objective using optical design software and reaches aberration
Optimization design.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is MTF curve figure of the invention；
Fig. 3 is point range figure of the invention；
Fig. 4 is the curvature of field and distortion figure of the invention.
In figure: 1, the first diverging meniscus lens；2, biconcave lens；3, the first convex lens；4, the second convex lens；5, first pair of glue
Close lens；51, the 4th convex lens；52, the first concavees lens；6, the second cemented doublet；61, the second concavees lens, the 62, the 5th convex lens
Mirror；7, third convex lens；8, the first positive meniscus lens；9, dmd chip, 10, prism group, 11, diaphragm, 12, window glass.
Specific embodiment
A specific embodiment of the invention is further illustrated in conjunction with attached drawing.
As shown in Figure 1, the structure that the present invention uses is: a kind of low full HD projection lens that distorts of low F number, including projection lens
Head ontology, the projection lens include several lens subassemblies being arranged with optical axis being set between perspective plane and dmd chip 9,
The lens subassembly sequentially includes the first diverging meniscus lens 1, biconcave lens 2, the first convex lens 3, the second convex lens from left to right
4, the first cemented doublet 5, the second cemented doublet 6, third convex lens 7, the first positive meniscus lens 8；The dmd chip modulation
Projected light beam pass sequentially through the first positive meniscus lens, third convex lens, the second cemented doublet, first of the lens subassembly
Cemented doublet, the second convex lens, the first convex lens, biconcave lens and the first diverging meniscus lens are simultaneously imaged on the projection surface.Institute
The focal length of projection lens is stated between 8.5~9.5mm, F number is between 1.6~1.8.
The projection lens further includes the prism group 10 being set between dmd chip and the first positive meniscus lens and is placed in
Diaphragm face 11 between second convex lens and the first cemented doublet.Further, between prism group 11 and dmd chip 10,
It is additionally provided with window glass 12.It is boundary with diaphragm 12, bears group eyeglass preceding, just organizing posterior retrofocus type object lens.
The dmd chip is 0.65 inch, and resolution ratio is 1920 × 1080 or 0.67 inches, and resolution ratio is 1920 × 1200
One of.
First cemented doublet 5 specifically may include in embodiment close to the 4th convex lens 51 of diaphragm face 12 and close
First concavees lens 52 of the second cemented doublet 6.
Second cemented doublet 6 specifically may include the second concavees lens in embodiment close to the first cemented doublet 5
61 and close to third convex lens 7 the 5th convex lens 62.
Specifically, the focal length of the first diverging meniscus lens described in the present embodiment is between -30mm and -60mm；It is described double
The focal length of concavees lens is between -40mm and -20mm；The focal length of first convex lens is between 70mm and 90mm；It is described
The focal length of second convex lens is between 85mm and 115mm；The focal length of first cemented doublet is between -70mm and -40mm
Between；The focal length of second cemented doublet is between 120mm and 160mm；The focal length of the third convex lens between
Between 25mm and 40mm；The focal length of first positive meniscus lens is between 90mm and 130mm.
The refractive index of first diverging meniscus lens is between 1.50 and 1.60；The refractive index of the biconcave lens between
Between 1.65 and 1.75；The refractive index of first convex lens is between 1.65 and 1.75；The refraction of second convex lens
Rate is between 1.70 and 1.80；In first cemented doublet, close to diaphragm the 4th convex lens refractive index between
Between 1.55 and 1.65, the first concavees lens refractive index close to the second cemented doublet is between 1.85 and 1.2；Described second
In cemented doublet, close to the first cemented doublet the second concavees lens refractive index between 1.60 and 1.75, close to the
5th convex lens refractive index of three convex lenses is between 1.45 and 1.55；The refractive index of the third convex lens between 1.55 with
Between 1.65；The refractive index of first positive meniscus lens is between 1.60 and 1.75.
First diverging meniscus lens and the first positive full moon lens or so two sides are aspherical.
It should be noted that modify to the spacing between the radius of curvature of each lens, material, thickness and lens,
Reach the optimization to aberration.
It is to provide a kind of parameter of projection lens optical system embodiment of the present invention for 0.65 inch of dmd chip below.
Asphericity coefficient:
| Surface | x2 | x4 | x6 |
| 18 | 0 | -2.58142E-05 | -5.32334E-09 |
| 19 | 0 | -1.40176E-05 | 1.91951E-09 |
84 degree of visual field, focal length 9.2mm, optical tube length 180mm, F1.7 are finally obtained, is distorted less than 0.11%, each field image
Matter is uniform and the optimal optical projection lens of image quality.The present invention, which is realized, forms the image planes that diagonal line is 1.78m in the position 1m.
MTF curve if Fig. 2 is each visual field under 66lp/mm in MTF curve figure figure of the invention compact is greater than at a branch of
0.60, illustrate that the lens imaging picture is clearly uniform.The pixel of 1920 × 1,200 0.67 chip is 7.56 microns, corresponding Kui Buddhist nun
This line is the resolution requirement for meeting the chip to lower numerical value > 0.60 MTF in the line to for 66lp/mm.0.65 chip is less than
0.67 chip, pixel are equally 7.56 microns, and corresponding Kui Nisi line is to lower numerical value > 0.60 MTF in the line to for 66lp/mm
Meet the resolution requirement of the chip.
If Fig. 3 is point range figure of the invention, know from figure, the point range figure under each visual field is averaged disc of confusion radius less than 6.24
Micron, image quality are fine.
Fig. 4 is the curvature of field and distortion figure of the invention, and perceptive distortion is less than 0.11% from figure.
The low full HD projection lens of distortion of above-mentioned low F number bears group eyeglass preceding using diaphragm as boundary, and positive to organize eyeglass posterior anti-
Telephoto lens select the camera lens of close structural for initial configuration according to this configuration, change chip size, increase and decrease glass by replacement
The optimization design of glass material, focal length scaling and aberration control is finally reached the excellent projection lens design of image quality；Use double aspheric
Face eyeglass designs camera lens, reaches higher clarity；It is designed using low F number, while guaranteeing that MTF keeps high value；It is double non-
Spherical design also meets the specific demand of low distortion.
Claims (8)
1. a kind of low full HD projection lens that distorts of low F number, including projection lens ontology, which is characterized in that the projection lens
Focal length between 8.5~9.5mm, F number between 1.6~1.8, the projection lens include be set to perspective plane and DMD core
For several between piece with the lens subassembly of optical axis setting, the lens subassembly sequentially includes that the first negative bent moon is saturating from left to right
Mirror, biconcave lens, the first convex lens, the second convex lens, the first cemented doublet, the second cemented doublet, third convex lens,
One positive meniscus lens；The projected light beam of dmd chip modulation passes sequentially through the first positive meniscus lens of the lens subassembly, the
Three convex lenses, the second cemented doublet, the first cemented doublet, the second convex lens, the first convex lens, biconcave lens and first are negative
Meniscus lens is simultaneously imaged on the projection surface.
2. the low full HD projection lens that distorts of low F number according to claim 1, which is characterized in that the projection lens packet
Include the prism group being set between dmd chip and the first positive meniscus lens.
3. the low full HD projection lens that distorts of low F number according to claim 1, which is characterized in that the projection lens is also
Include the diaphragm face being placed between the second convex lens and the first cemented doublet.
4. the low full HD projection lens that distorts of low F number according to claim 1 to 3, which is characterized in that the first pair of glue
Closing lens further includes the 4th convex lens close to diaphragm face and the first concavees lens close to the second cemented doublet；Described second pair
Balsaming lens further includes the second concavees lens close to the first cemented doublet and the 5th convex lens close to third convex lens.
5. the low full HD projection lens of distortion of low F number according to claim 1, it is characterised in that: the dmd chip is
0.65 inch, resolution ratio is 1920 × 1080 or 0.67 inches, and resolution ratio is one of 1920 × 1200.
6. the low full HD projection lens that distorts of low F number according to claim 1, it is characterised in that:
The focal length of first diverging meniscus lens is between -30mm and -60mm；
The focal length of the biconcave lens is between -40mm and -20mm；
The focal length of first convex lens is between 70mm and 90mm；
The focal length of second convex lens is between 85mm and 115mm；
The focal length of first cemented doublet is between -70mm and -40mm；
The focal length of second cemented doublet is between 120mm and 160mm；
The focal length of the third convex lens is between 25mm and 40mm；
The focal length of first positive meniscus lens is between 90mm and 130mm.
7. the low full HD projection lens that distorts of low F number according to claim 4, it is characterised in that:
The refractive index of first diverging meniscus lens is between 1.50 and 1.60；
The refractive index of the biconcave lens is between 1.65 and 1.75；
The refractive index of first convex lens is between 1.65 and 1.75；
The refractive index of second convex lens is between 1.70 and 1.80；
In first cemented doublet, the refractive index of the 4th convex lens of close diaphragm is close between 1.55 and 1.65
First concavees lens refractive index of the second cemented doublet is between 1.85 and 1.2；
In second cemented doublet, the refractive index of the second concavees lens of close first cemented doublet is between 1.60 and 1.75
Between, the 5th convex lens refractive index close to third convex lens is between 1.45 and 1.55；
The refractive index of the third convex lens is between 1.55 and 1.65；
The refractive index of first positive meniscus lens is between 1.60 and 1.75.
8. the low full HD projection lens that distorts of low F number according to claim 1, it is characterised in that: the first negative bent moon
Lens and the first positive full moon lens or so two sides are aspherical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811105119.XA CN109100857A (en) | 2018-09-21 | 2018-09-21 | A kind of low full HD projection lens that distorts of low F number |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811105119.XA CN109100857A (en) | 2018-09-21 | 2018-09-21 | A kind of low full HD projection lens that distorts of low F number |
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| Publication Number | Publication Date |
|---|---|
| CN109100857A true CN109100857A (en) | 2018-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811105119.XA Pending CN109100857A (en) | 2018-09-21 | 2018-09-21 | A kind of low full HD projection lens that distorts of low F number |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112764298A (en) * | 2021-01-31 | 2021-05-07 | 迪擎光电(台州)有限责任公司 | Projection lens system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001100092A (en) * | 1999-09-30 | 2001-04-13 | Ricoh Co Ltd | Photographic optical system |
| CN107544126A (en) * | 2017-09-06 | 2018-01-05 | 杭州有人光电技术有限公司 | A kind of full HD projection lens of low F numbers |
| WO2018113623A1 (en) * | 2016-12-21 | 2018-06-28 | 深圳市掌网科技股份有限公司 | Lens module |
| CN208752299U (en) * | 2018-09-21 | 2019-04-16 | 杭州有人光电技术有限公司 | A kind of low full HD projection lens that distorts of low F number |
-
2018
- 2018-09-21 CN CN201811105119.XA patent/CN109100857A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001100092A (en) * | 1999-09-30 | 2001-04-13 | Ricoh Co Ltd | Photographic optical system |
| WO2018113623A1 (en) * | 2016-12-21 | 2018-06-28 | 深圳市掌网科技股份有限公司 | Lens module |
| CN107544126A (en) * | 2017-09-06 | 2018-01-05 | 杭州有人光电技术有限公司 | A kind of full HD projection lens of low F numbers |
| CN208752299U (en) * | 2018-09-21 | 2019-04-16 | 杭州有人光电技术有限公司 | A kind of low full HD projection lens that distorts of low F number |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112764298A (en) * | 2021-01-31 | 2021-05-07 | 迪擎光电(台州)有限责任公司 | Projection lens system |
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