CN206990887U - A kind of high definition projection lens - Google Patents
A kind of high definition projection lens Download PDFInfo
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- CN206990887U CN206990887U CN201720593105.1U CN201720593105U CN206990887U CN 206990887 U CN206990887 U CN 206990887U CN 201720593105 U CN201720593105 U CN 201720593105U CN 206990887 U CN206990887 U CN 206990887U
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Abstract
The utility model provides a kind of high definition projection lens,High definition projection lens includes the lens subassembly set between perspective plane and dmd chip,Lens subassembly includes the first diverging meniscus lens set successively with optical axis,Second diverging meniscus lens,Biconcave lens,First convex lens,Second convex lens,Three balsaming lens groups,3rd convex lens,4th convex lens,Projection lens is designed using moulded glass aspherical lens,Use using diaphragm as boundary,Negative lens group is preceding,The posterior retrofocus type objective lens arrangement of positive lens groups,It is simple in construction,It is initial configuration according to the camera lens of this structure choice close structural,Change dmd chip size,By changing and increasing and decreasing glass material,Focal length scales and the optimization design of aberration control,The fine definition and TV distortion for not only meeting aspherical projection lens require,Solves the problems, such as plastic aspherical element eyeglass yellow,Extend the service life of projection lens.
Description
Technical field
It the utility model is related to photoelectricity projection art, more particularly to a kind of high definition projection lens.
Background technology
The projecting apparatus of higher pixel generally uses aspherical projection lens, definition and the TV distortion of projection lens at present
It is required that be easier to meet, but existing projection lens uses plastic aspherical element eyeglass material, and plastic aspherical element eyeglass material
The easy yellow of matter, the service life of projection lens is influenceed, and projection lens is preserved bar using plastic aspherical element eyeglass material
Part is strict, and eyeglass is easily lost.
Utility model content
For overcome the deficiencies in the prior art, one of the purpose of this utility model is to provide a kind of high definition projection lens,
Projection lens is designed using moulded glass aspherical lens, is used using diaphragm as boundary, negative lens group is preceding, and positive lens groups are rear
Retrofocus type objective lens arrangement, it is simple in construction, be initial configuration according to the camera lens of this structure choice close structural, change DMD cores
Piece size, by the optimization design for changing and increasing and decreasing glass material, focal length scaling and aberration control, there is provided a 84 ° of the angle of visual field,
Distortion is less than 0.25%, and focal length is 6.64mm projection lens, realizes the image planes for forming that diagonal is 1.78m in 1m positions, no
The fine definition and TV distortion for only meeting aspherical projection lens require solve the problems, such as plastic aspherical element eyeglass yellow, prolong
The service life of long projection lens.
The utility model provides a kind of high definition projection lens, and high definition projection lens includes setting between perspective plane and dmd chip
The lens subassembly put, it is the first diverging meniscus lens that the lens subassembly includes setting with optical axis successively, the second diverging meniscus lens, double
Concavees lens, the first convex lens, the second convex lens, three balsaming lens groups, the 3rd convex lens, the 4th convex lens；The dmd chip is adjusted
Projection signal's light projection of system enters the high definition projection lens, and light is successively by the 4th convex lens, the 3rd convex lens, three glue
Lens group, the second convex lens, the first convex lens, biconcave lens, the second diverging meniscus lens and the first diverging meniscus lens is closed to project
It is imaged on screen.
Further, the focal length of the high definition camera lens is between 6mm and 7mm.
Further, the focal length of first diverging meniscus lens is between -95mm and -75mm；
The focal length of second diverging meniscus lens is between -40mm and -30mm；
The focal length of the biconcave lens is between -25mm and -15mm；
The focal length of first convex lens is between 40mm and 55mm；
The focal length of second convex lens is between 50mm and 60mm；
The focal length of the three balsaming lens group is between -20mm and -25mm；
The focal length of 3rd convex lens is between 30mm and 40mm；
The focal length of 4th convex lens is between 40mm and 55mm.
Further, it is the three balsaming lens group includes setting gradually the first concavees lens, the 5th convex lens, second recessed
Mirror.
Further, the refractive index of first diverging meniscus lens is between 1.75 and 1.85；
The refractive index of second diverging meniscus lens is between 1.45 and 1.55；
The refractive index of the biconcave lens is between 1.65 and 1.75；
The refractive index of first convex lens is between 1.70 and 1.80；
The refractive index of second convex lens is between 1.85 and 1.95；
The refractive index of first concavees lens is between 1.85 and 1.95；
The refractive index of 5th convex lens is between 1.45 and 1.55；
The refractive index of second concavees lens is between 1.75 and 1.85；
The refractive index of 3rd convex lens is between 1.55 and 1.65；
The refractive index of 4th convex lens is between 1.55 and 1.65.
Further, in addition to prism group, the prism group is between the 4th convex lens and dmd chip.
Further, in addition to diaphragm, the diaphragm is between second convex lens and the three balsaming lens group.
Further, it is that 1920 × 1080 or 0.48 inches of resolution ratio are that the dmd chip, which is selected from 0.47 inch of resolution ratio,
1920×1200。
Further, the dmd chip is vertical with optical axis, and the center of the dmd chip passes through optical axis.
Compared with prior art, the beneficial effects of the utility model are：
The utility model provides a kind of high definition projection lens, and high definition projection lens includes setting between perspective plane and dmd chip
The lens subassembly put, it is the first diverging meniscus lens that the lens subassembly includes setting with optical axis successively, the second diverging meniscus lens, double
Concavees lens, the first convex lens, the second convex lens, three balsaming lens groups, the 3rd convex lens, the 4th convex lens, utilize moulded glass
Aspherical lens design projection lens, use using diaphragm as boundary, negative lens group is in preceding, the posterior retrofocus type thing of positive lens groups
Mirror structure, it is simple in construction, it is initial configuration according to the camera lens of this structure choice close structural, changes dmd chip size, by more
Change and increase and decrease glass material, the optimization design of focal length scaling and aberration control, there is provided a 84 ° of the angle of visual field, distortion is less than
0.25%, focal length is 6.64mm projection lens, realizes the image planes for forming that diagonal is 1.78m in 1m positions, not only meets non-
Fine definition and the TV distortion of spherical projection camera lens require solve the problems, such as plastic aspherical element eyeglass yellow, extend projection lens
The service life of head.
Described above is only the general introduction of technical solutions of the utility model, in order to better understand skill of the present utility model
Art means, and being practiced according to the content of specification, with preferred embodiment of the present utility model and coordinate accompanying drawing detailed below
Describe in detail bright as after.Specific embodiment of the present utility model is shown in detail by following examples and its accompanying drawing.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding to of the present utility model, forms the part of the application,
Schematic description and description of the present utility model is used to explain the utility model, does not form to of the present utility model improper
Limit.In the accompanying drawings：
Fig. 1 is a kind of high definition projection lens structural representation of the present utility model；
Fig. 2 is three balsaming lens group structural representation of the present utility model；
Fig. 3 is a kind of high definition projection lens MTF curve figure of the present utility model；
Fig. 4 is a kind of high definition projection lens point range figure of the present utility model；
Fig. 5 is a kind of high definition projection lens curvature of field of the present utility model and distortion figure；
In accompanying drawing, the 1, first diverging meniscus lens；2nd, the second diverging meniscus lens；3rd, biconcave lens；4th, the first convex lens；5th,
Two convex lens；6th, diaphragm；7th, three balsaming lens group；8th, the 3rd convex lens；9th, the 4th convex lens；10th, prism group eyes；11st, window
Mouth glass；12nd, dmd chip；21st, the first concavees lens；22nd, the 5th convex lens；23rd, the second concavees lens.
Embodiment
Below, with reference to accompanying drawing and embodiment, the utility model is described further, it is necessary to explanation is,
On the premise of not colliding, it can be formed in any combination between various embodiments described below or between each technical characteristic new
Embodiment.
A kind of high definition projection lens, as shown in figure 1, in one embodiment, high definition projection lens includes perspective plane and DMD cores
The lens subassembly set between piece 12, lens subassembly include the first diverging meniscus lens 1, the second negative bent moon set successively with optical axis
Lens 2, biconcave lens 3, the first convex lens 4, the second convex lens 5, three balsaming lens groups 7, the 3rd convex lens 8, the 4th convex lens
9, it is preferable that for the focal length of high definition camera lens between 6mm and 7mm, three balsaming lens groups 7 include the first concavees lens set gradually
21st, the 5th convex lens 22, the second concavees lens 23, projection signal's light projection that dmd chip 12 is modulated enter high definition projection lens, light according to
It is secondary to pass through the 4th convex lens 9, the 3rd convex lens 8, three balsaming lens groups 7, the second convex lens 5, the first convex lens 4, biconcave lens
3rd, the second diverging meniscus lens 2 and the first diverging meniscus lens 1 are imaged on the projection screen, it is preferable that also including prism group 10, prism
Group 10 between the 4th convex lens 9 and dmd chip 12, window glass 11 between prism group 10 and dmd chip 12, in addition to
Diaphragm 6, diaphragm 6 is between the second convex lens 5 and three balsaming lens groups 7, it is preferable that the first diverging meniscus lens 1, second is negative curved
Month lens 2, biconcave lens 3, the first convex lens 4, the second convex lens 5, three balsaming lens groups 7, the 3rd convex lens 8, the 4th convex lens
Mirror 9 is that glass material is made.
In one embodiment, it is preferable that the focal length of the first diverging meniscus lens 1 is between -95mm and -75mm；Second is negative
The focal length of meniscus lens 2 is between -40mm and -30mm；The focal length of biconcave lens 3 is between -25mm and -15mm；First
The focal length of convex lens 4 is between 40mm and 55mm；The focal length of second convex lens 5 is between 50mm and 60mm；Three is glued saturating
The focal length of microscope group 7 is between -20mm and -25mm；The focal length of 3rd convex lens 8 is between 30mm and 40mm；4th convex lens
The focal length of mirror 9 is between 40mm and 55mm.
In one embodiment, it is preferable that the refractive index of the first diverging meniscus lens 1 is between 1.75 and 1.85；Second is negative
The refractive index of meniscus lens 2 is between 1.45 and 1.55；The refractive index of biconcave lens 3 is between 1.65 and 1.75；First
The refractive index of convex lens 4 is between 1.70 and 1.80；The refractive index of second convex lens 5 is between 1.85 and 1.95；First
The refractive index of concavees lens 21 is between 1.85 and 1.95；The refractive index of 5th convex lens 22 is between 1.45 and 1.55；The
The refractive index of two concavees lens 23 is between 1.75 and 1.85；The refractive index of 3rd convex lens 8 is between 1.55 and 1.65；The
The refractive index of four convex lens 9 is between 1.55 and 1.65.
In one embodiment, it is preferable that it is 1920 × 1080 or 0.48 inches that dmd chip 12, which is selected from 0.47 inch of resolution ratio,
Resolution ratio is 1920 × 1200, and dmd chip 12 is vertical with optical axis, and the center of dmd chip 12 passes through optical axis.
In one embodiment, by being repaiied to the spacing between the radius of curvature of each lens, material, thickness and lens
Change, optimize aberration, so that 0.47 inch of resolution ratio is 1920 × 1080 dmd chip as an example,
A kind of parameter of high definition projection lens embodiment of utility model is provided, surface sequence number is convex from the first diverging meniscus lens 1
Face is the 1st face, and beginning is incremented by successively from left to right, and lens group parameter is as shown in table 1, and aspherical surface data is as shown in table 2：
The lens group parameter of table 1
| Surface sequence number | Type | Radius of curvature | Thickness | Glass material | Rate of taper |
| 1 | 46.483 | 8.400 | 1.81,33.3 | ||
| 2 | 25.553 | 11.737 | |||
| 3 | It is aspherical | 49.259 | 2.000 | 1.49,70.4 | -1.01453E+01 |
| 4 | It is aspherical | 12.968 | 15.812 | -2.20794E+00 | |
| 5 | -21.576 | 2.000 | 1.69,49.2 | ||
| 6 | 45.112 | 9.956 | |||
| 7 | -422.071 | 9.512 | 1.75,51.0 | ||
| 8 | -33.591 | 0.200 | |||
| 9 | 64.014 | 9.328 | 1.70,55.5 | ||
| 10 | -89.399 | 39.755 | |||
| 11 | ∞ | 2.947 | |||
| 12 | 40.975 | 1.800 | 1.91,35.3 | ||
| 13 | 13.115 | 6.955 | 1.50,81.6 | ||
| 14 | -9.138 | 4.553 | 1.81,41.0 | ||
| 15 | -22.930 | 2.089 | |||
| 16 | -107.714 | 5.422 | 1.60,65.5 | ||
| 17 | -18.285 | 0.200 | |||
| 18 | 29.056 | 3.947 | 1.62,57.0 | ||
| 19 | 1467.909 | 3.614 | |||
| 20 | Prism group | ∞ | 16.000 | 1.72,37.9 | |
| 21 | ∞ | 2.000 | |||
| 22 | Window glass | ∞ | 1.100 | 1.51,62.4 | |
| 23 | ∞ | 0.703 | |||
| 24 | Image planes | ∞ | 0.000 |
The aspherical surface data of table 2
In one embodiment, 84 degree, focal length 6.64mm of visual field is finally given, optical tube length 160mm, F1.7, distortion are less than
0.25%, each field image matter realizes that it is 1.78m to form diagonal in 1m positions uniformly and as the optimal optical projection lenses of matter
Image planes.
In one embodiment, as shown in Fig. 2 the MTF curve of each visual field is compact into a branch of under 93lp/mm in MTF curve figure
More than 0.65, illustrating that lens imaging picture is clearly uniform, the pixel of 1920 × 1,200 0.48 inch of dmd chip is 5.4 microns,
Corresponding Kui Nisi lines to for 93lp/mm, being more than 0.65 resolution requirement for meeting dmd chip to lower MTF numerical value in the line,
0.47 inch of dmd chip is less than 0.48 inch of dmd chip, and 0.47 inch of dmd chip pixel is also 5.4 microns, corresponding
Kui Nisi lines in the line to for 93lp/mm, being more than 0.65 resolution requirement for meeting dmd chip to lower MTF numerical value.
In one embodiment, as shown in figure 3, the average disc of confusion radius of point range figure under each visual field is less than 2.3 microns, as matter
It is good.
In one embodiment, as shown in figure 4, the high definition projection lens curvature of field is less than 0.027mm, distortion is less than 0.25%.
The utility model provides a kind of high definition projection lens, and high definition projection lens includes setting between perspective plane and dmd chip
The lens subassembly put, the first diverging meniscus lens, the second diverging meniscus lens, concave-concave that lens subassembly includes setting with optical axis successively are saturating
Mirror, the first convex lens, the second convex lens, three balsaming lens groups, the 3rd convex lens, the 4th convex lens, using moulded glass aspheric
Face eyeglass designs projection lens, uses using diaphragm as boundary, negative lens group is in preceding, the posterior retrofocus type object lens knot of positive lens groups
Structure, it is simple in construction, be initial configuration according to the camera lens of this structure choice close structural, change dmd chip size, by change and
Increase and decrease glass material, focal length scales and the optimization design of aberration control, there is provided a 84 ° of the angle of visual field, distortion are less than 0.25%, Jiao
Away from the projection lens for 6.64mm, the image planes for forming that diagonal is 1.78m in 1m positions are realized, not only meet aspherical projection lens
Fine definition and the TV distortion of head require solve the problems, such as plastic aspherical element eyeglass yellow, and extend projection lens uses the longevity
Life.
More than, preferred embodiment only of the present utility model, not make any formal limit to the utility model
System；The those of ordinary skill of all industry can swimmingly implement the utility model shown in by specification accompanying drawing and above；But
It is that all those skilled in the art are not being departed from the range of technical solutions of the utility model, utilizes disclosed above skill
Art content and the equivalent variations of a little variation, modification and evolution made, are equivalent embodiment of the present utility model；Meanwhile
All variation, modification and evolution of any equivalent variations made according to substantial technological of the present utility model to above example etc.,
Still fall within the protection domain of the technical solution of the utility model.
Claims (9)
- A kind of 1. high definition projection lens, it is characterised in that：High definition projection lens is saturating including being set between perspective plane and dmd chip Mirror assembly, the first diverging meniscus lens, the second diverging meniscus lens, concave-concave that the lens subassembly includes setting with optical axis successively are saturating Mirror, the first convex lens, the second convex lens, three balsaming lens groups, the 3rd convex lens, the 4th convex lens；The dmd chip modulation Projection signal's light projection enters the high definition projection lens, and light is saturating by the 4th convex lens, the 3rd convex lens, three gluings successively Microscope group, the second convex lens, the first convex lens, biconcave lens, the second diverging meniscus lens and the first diverging meniscus lens are in projection screen Upper imaging.
- A kind of 2. high definition projection lens as claimed in claim 1, it is characterised in that：The focal length of the high definition camera lens is between 6mm Between 7mm.
- A kind of 3. high definition projection lens as claimed in claim 1, it is characterised in that：The focal length of first diverging meniscus lens is between -95mm and -75mm；The focal length of second diverging meniscus lens is between -40mm and -30mm；The focal length of the biconcave lens is between -25mm and -15mm；The focal length of first convex lens is between 40mm and 55mm；The focal length of second convex lens is between 50mm and 60mm；The focal length of the three balsaming lens group is between -20mm and -25mm；The focal length of 3rd convex lens is between 30mm and 40mm；The focal length of 4th convex lens is between 40mm and 55mm.
- A kind of 4. high definition projection lens as claimed in claim 1, it is characterised in that：The three balsaming lens group includes setting successively The first concavees lens, the 5th convex lens, the second concavees lens put.
- A kind of 5. high definition projection lens as claimed in claim 4, it is characterised in that：The refractive index of first diverging meniscus lens is between 1.75 and 1.85；The refractive index of second diverging meniscus lens is between 1.45 and 1.55；The refractive index of the biconcave lens is between 1.65 and 1.75；The refractive index of first convex lens is between 1.70 and 1.80；The refractive index of second convex lens is between 1.85 and 1.95；The refractive index of first concavees lens is between 1.85 and 1.95；The refractive index of 5th convex lens is between 1.45 and 1.55；The refractive index of second concavees lens is between 1.75 and 1.85；The refractive index of 3rd convex lens is between 1.55 and 1.65；The refractive index of 4th convex lens is between 1.55 and 1.65.
- A kind of 6. high definition projection lens as claimed in claim 1, it is characterised in that：Also include prism group, the prism group position Between the 4th convex lens and dmd chip.
- A kind of 7. high definition projection lens as claimed in claim 1, it is characterised in that：Also include diaphragm, the diaphragm is located at institute State between the second convex lens and the three balsaming lens group.
- A kind of 8. high definition projection lens as claimed in claim 1, it is characterised in that：The dmd chip is selected from 0.47 I.P.M Resolution is that 1920 × 1080 or 0.48 inches of resolution ratio are 1920 × 1200.
- A kind of 9. high definition projection lens as claimed in claim 1, it is characterised in that：The dmd chip is vertical with optical axis, described The center of dmd chip passes through optical axis.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109375350A (en) * | 2018-12-26 | 2019-02-22 | 杭州有人光电技术有限公司 | A kind of full HD projection lens |
| CN109633868A (en) * | 2019-02-19 | 2019-04-16 | 南阳南方智能光电有限公司 | The micro- throwing projection lens of burnt high definition in one kind |
| CN110426815A (en) * | 2019-07-19 | 2019-11-08 | 杭州有人光电技术有限公司 | A kind of small-sized low F number high definition projection lens |
| CN116858504A (en) * | 2023-09-04 | 2023-10-10 | 武汉振光科技有限公司 | Optical axis monitoring system |
-
2017
- 2017-05-25 CN CN201720593105.1U patent/CN206990887U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109375350A (en) * | 2018-12-26 | 2019-02-22 | 杭州有人光电技术有限公司 | A kind of full HD projection lens |
| CN109633868A (en) * | 2019-02-19 | 2019-04-16 | 南阳南方智能光电有限公司 | The micro- throwing projection lens of burnt high definition in one kind |
| CN109633868B (en) * | 2019-02-19 | 2021-06-01 | 南阳南方智能光电有限公司 | Medium-focus high-definition micro-projection lens |
| CN110426815A (en) * | 2019-07-19 | 2019-11-08 | 杭州有人光电技术有限公司 | A kind of small-sized low F number high definition projection lens |
| CN110426815B (en) * | 2019-07-19 | 2021-05-18 | 杭州有人光电技术有限公司 | Small low-F-number high-definition projection lens |
| CN116858504A (en) * | 2023-09-04 | 2023-10-10 | 武汉振光科技有限公司 | Optical axis monitoring system |
| CN116858504B (en) * | 2023-09-04 | 2023-12-08 | 武汉振光科技有限公司 | Optical axis monitoring system |
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Effective date of registration: 20190927 Address after: 242000 5 story of B9 building, science and Technology Park, Xuancheng economic and Technological Development Zone, Anhui Patentee after: Anhui Renhe Photoelectric Technology Co., Ltd. Address before: Hangzhou City, Zhejiang province Yuhang District 310000 Street Wuchang Wenyi Road No. 998 building 4 room 611-2 Patentee before: Hangzhou Photoelectric Technology Co., Ltd. |
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