CN209070213U - A kind of outdoor projection camera lens - Google Patents
A kind of outdoor projection camera lens Download PDFInfo
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- CN209070213U CN209070213U CN201821546613.5U CN201821546613U CN209070213U CN 209070213 U CN209070213 U CN 209070213U CN 201821546613 U CN201821546613 U CN 201821546613U CN 209070213 U CN209070213 U CN 209070213U
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- lens
- lens group
- projection camera
- positive light
- light coke
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Abstract
The utility model discloses a kind of outdoor projection camera lenses, including along optical axis from image source side to the first lens group of the fixation with positive light coke being arranged successively at image side and the second lens group moved with positive light coke, second lens group meets f1/f2 > 3.5 for internal focusing, the combined focal length f1 of first lens group and the combined focal length f2 of second lens group.The utility model is small in size, light, can automatic focusing, be suitable for outdoor use.
Description
Technical field
The utility model relates to projection arts, and in particular to a kind of outdoor projection camera lens.
Background technique
With high-tech development, it is more and more extensive to project application, in addition to cinema, stage, square, office with
And except the indoor scenarios such as family, it is also applied to open air.
Indoor projection machine generally uses manual focusing, and camera lens would generally be made into a lens group, than cumbersome, if in room
This projector is also used outside, and manual focusing is not only inconvenient, but also can increase the danger of staff, if but will be this
Projector is changed to electromotion focusing, and bulky lens group is also unfavorable for electromotion focusing, thus be badly in need of design it is a kind of application outdoors and
It is capable of the projection lens of automatic focusing.
Utility model content
The utility model in view of the above problems, provides a kind of outdoor projection camera lens, small in size, light, can be certainly
Dynamic focusing is suitable for outdoor use.
The utility model to achieve the above object, takes following technical scheme to be achieved:
A kind of outdoor projection camera lens, including along optical axis from image source side at image side be arranged successively with positive light coke
Second lens group of the first fixed lens group and the movement with positive light coke, second lens group are focused for internal,
The combined focal length f1 of first lens group and the combined focal length f2 of second lens group meet f1/f2 > 3.5.
Preferably, first lens group includes having positive light focus from image source side to what is be arranged successively at image side along optical axis
The first lens, the second lens with negative power, the third lens with positive light coke, the with positive light coke the 4th of degree
Lens and aperture diaphragm STO.
Preferably, first lens, the second lens, the third lens and the 4th lens are spherical lens.
Preferably, first lens and the second lens are dense flint glass, and the third lens are crown glass, the 4th lens
Attach most importance to crown glass.
Preferably, second lens group includes having positive light focus from image source side to what is be arranged successively at image side along optical axis
The 5th lens, the 6th lens with positive light coke and the 7th lens with negative power of degree.
Preferably, the 5th lens, the 6th lens and the 7th lens are spherical lens.
Preferably, the 5th lens and the 6th lens are crown glass, and the 7th lens are dense flint glass.
Preferably, the image side surfaces of the 7th lens are concave surface.
Preferably, the aperture FNO of the projection lens is 1.3.
Preferably, the field angle FOV of the projection lens is 30 degree.
Compared with prior art, the beneficial effects of the utility model are as follows:
The utility model is small in size, light, is combined by the first fixed lens group and moveable second lens group
Projection lens is realized internal focusing function using the second lens group, so that the projection lens is suitable for different projector distances, is fitted
For outdoor use.
Detailed description of the invention
Fig. 1 is a kind of optical system diagram of outdoor projection camera lens of the utility model；
Fig. 2 is the vertical axial aberration figure of the optical system of Fig. 1；
Fig. 3 is the curvature of field and distortion aberration figure of the optical system of Fig. 1；
Fig. 4 is the spherical aberration aberration diagram of the optical system of Fig. 1；
Fig. 5 is a kind of schematic diagram of outdoor projection camera lens practical application projection of the utility model.
Specific embodiment
The embodiments of the present invention are described in detail below in conjunction with attached drawing.
Referring to FIG. 1 to FIG. 5, a kind of outdoor projection camera lens, including along optical axis from image source side to being arranged successively at image side
First lens group G1 of the fixation with positive light coke and the second lens group G2 of the movement with positive light coke, the second lens group
G2 for internal focusing, the combined focal length f2 of the combined focal length f1 of the first lens group G1 and the second lens group G2 meet f1/f2 >
3.5。
In the present embodiment, the first position lens group G1 is fixed, and the distance of the first lens group G1 to imaging surface IMA is constant, the
Two lens group G2 can be moved, and the second moveable maximum distance of lens group G2 is 27mm, so that the second lens group G2 is mobile
Preferably focusing.After projector distance changes, so that it may adjust the position of the second lens group G2, change the first lens group G1 with
The distance between second lens group G2, and then change the distance between the second lens group G2 and imaging surface IMA, to realize projection lens
The focusing of head.
Optionally, the first lens group G1 includes having positive light coke from image source side to what is be arranged successively at image side along optical axis
The first lens L1, the second lens L2 with negative power, the third lens L3 with positive light coke, with positive light coke
4th lens L4 and aperture diaphragm STO.First lens L1, the second lens L2, the third lens L3 and the 4th lens L4 are
Spherical lens.
In the present embodiment, the image source side surface S1 and image side surfaces S2 of the first lens L1 is convex surface, the second lens L2
Image source side surface S3 and image side surfaces S4 be concave surface, the image source side surface S5 of the third lens L3 is concave surface, at image side table
Face S6 is convex surface, and the radius of curvature difference of image source side surface S5 and image side surfaces S6 is -2.24mm, so the third lens L3
Side thickness and middle thickness it is of substantially equal, can preferably optimize the aberrations such as spherical aberration, coma in the case where not changing color difference in this way, allow
Image quality is more preferable, and the image source side surface S7 and image side surfaces S8 of the 4th lens L4 is convex surface.
Further, the first lens L1 and the second lens L2 be dense flint glass, the third lens L3 be crown glass, the 4th
Lens L4 attaches most importance to crown glass.
Optionally, the second lens group G2 includes having positive light coke from image source side to what is be arranged successively at image side along optical axis
The 5th lens L5, the 6th lens L6 with positive light coke and the 7th lens L7 with negative power.5th lens L5,
6th lens L6 and the 7th lens L7 is spherical lens.
In the present embodiment, the image source side surface S9 and image side surfaces S10 of the 5th lens L5 is convex surface, the 6th lens L6
Image source side surface S11 and image side surfaces S12 be convex surface, the image side surfaces S13 of the 7th lens L7 is concave surface.By the 7th
The image side surfaces S13 of lens L7 is set as concave surface being capable of the significantly more efficient image surface curvature aberration for correcting the projection lens.Here
The 6th lens L6 use low dispersion, the 7th lens L7 use high-dispersion glass, by the 6th lens L6 and the 7th lens L7
It is combined with cemented surface, advantageously reduces axial chromatic aberration.
Optionally, the 5th lens L5 and the 6th lens L6 is crown glass, and the 7th lens L7 is dense flint glass.Using weight
Flint glass advantageously reduces chromatic longitudiinal aberration.
Table 1 shows the surface curvature radius for each lens that the projection lens of the present embodiment includes, spacing, d anaclasis
Rate, d light Abbe number, wherein the corresponding spacing in each surface refers to the surface the distance between to next surface, for example, S1 pairs
The spacing answered refers to the center S1 to the distance at the center S2, the i.e. center thickness of the first lens L1, and the corresponding spacing of S2 refers to that the center S2 is arrived
Air thickness between the distance between center S3, i.e. the first lens L1 and the second lens L2, the unit of radius of curvature and spacing
It is millimeter (mm).
Optionally, the aperture FNO of projection lens is 1.3.
Optionally, the camera lens visual angle FOV of projection lens is 30 degree.
Table 1
| Surface | Radius of curvature (mm) | Spacing (mm) | D optical index | D light Abbe number |
| S1 | 102.023 | 6.33 | 1.728250 | 28.317655 |
| S2 | -788.73 | 14.316 | ||
| S3 | -37.461 | 4 | 1.755199 | 27.530247 |
| S4 | 162.21 | 13.497 | ||
| S5 | -33.69 | 10.73 | 1.516798 | 64.198257 |
| S6 | -31.45 | 0.4998736 | ||
| S7 | 572.29 | 9.14 | 1.620409 | 60.343849 |
| S8 | -70.75 | 0 | ||
| ST0 | Infinity | 27 | ||
| S9 | 46.512 | 14.12 | 1.516798 | 64.198257 |
| S10 | -314.971 | 0.5 | ||
| S11 | 32.48 | 14.73 | 1.516798 | 64.198257 |
| S12 | -181.617 | 2 | 1.805184 | 25.465191 |
| S13 | 46.615 | 27.53237 | ||
| IMA | Infinity |
The focal length f=43.1mm of the projection lens of the present embodiment, the first lens group G1 of the present embodiment include four lens,
Second lens group G2 includes 3 lens, and most lens are placed in the first lens group G1, can effectively mitigate second
The weight of lens group G2 facilitates the second lens group G2 to be moved, and when being also beneficial to motor focusing, reduces the burden of motor.
The projection lens of the present embodiment is in practical application, also need the one of the second lens group G2 of the projection lens
Lateral edge optical axis set gradually pattern segments 3, condenser 2 and LED light source 1 from image source side at image side, pattern segments can also change
It is used at film.
Compared with prior art, the beneficial effects of the utility model are as follows:
The utility model is small in size, light, is combined by the first fixed lens group and moveable second lens group
Projection lens is realized internal focusing function using the second lens group, so that the projection lens is suitable for different projector distances, is fitted
For outdoor use.
Only as described above, the only preferred embodiment of the utility model, when the utility model cannot be limited with this
The range of implementation, i.e., generally according to simple made by content documented by the utility model claims and utility model specification
Equivalent changes and modifications all still belong within the utility model claims scope.In addition, abstract part and title are only
For assisting patent document search to be used, not it is used to limit the interest field of the utility model.
Claims (10)
1. a kind of outdoor projection camera lens, which is characterized in that including having along optical axis from image source side to what is be arranged successively at image side
Second lens group of the first lens group of the fixation of positive light coke and the movement with positive light coke, second lens group are used for
The combined focal length f1 of inside focusing, the combined focal length f1 of first lens group and second lens group meets f1/f2 > 3.5.
2. a kind of outdoor projection camera lens according to claim 1, which is characterized in that first lens group includes along light
Axis is from image source side to the first lens with positive light coke, the second lens with negative power, tool being arranged successively at image side
There are the third lens of positive light coke, the 4th lens with positive light coke and aperture diaphragm STO.
3. a kind of outdoor projection camera lens according to claim 2, which is characterized in that first lens, the second lens,
Three lens and the 4th lens are spherical lens.
4. a kind of outdoor projection camera lens according to claim 3, which is characterized in that first lens and the second lens are
Dense flint glass, the third lens are crown glass, and the 4th lens are attached most importance to crown glass.
5. a kind of outdoor projection camera lens according to claim 1, which is characterized in that second lens group includes along light
Axis from image source side to be arranged successively at image side the 5th lens with positive light coke, the 6th lens with positive light coke and
The 7th lens with negative power.
6. a kind of outdoor projection camera lens according to claim 5, which is characterized in that the 5th lens, the 6th lens with
And the 7th lens be spherical lens.
7. a kind of outdoor projection camera lens according to claim 6, which is characterized in that the 5th lens and the 6th lens are
Crown glass, the 7th lens are dense flint glass.
8. a kind of outdoor projection camera lens according to claim 5, which is characterized in that the image side surfaces of the 7th lens
For concave surface.
9. a kind of outdoor projection camera lens according to claim 1, which is characterized in that the aperture FNO of the projection lens is
1.3。
10. a kind of outdoor projection camera lens according to claim 1, which is characterized in that the field angle FOV of the projection lens
It is 30 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821546613.5U CN209070213U (en) | 2018-09-21 | 2018-09-21 | A kind of outdoor projection camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821546613.5U CN209070213U (en) | 2018-09-21 | 2018-09-21 | A kind of outdoor projection camera lens |
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| Publication Number | Publication Date |
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| CN209070213U true CN209070213U (en) | 2019-07-05 |
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ID=67092975
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821546613.5U Active CN209070213U (en) | 2018-09-21 | 2018-09-21 | A kind of outdoor projection camera lens |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568600A (en) * | 2019-08-28 | 2019-12-13 | 深圳市灿锐科技有限公司 | Variable-working-distance variable-magnification telecentric lens and use method thereof |
| CN111399347A (en) * | 2020-05-15 | 2020-07-10 | 安徽国芯智能装备有限公司 | Illumination area continuously adjustable uniform illumination system |
| WO2022062609A1 (en) * | 2020-09-25 | 2022-03-31 | Oppo广东移动通信有限公司 | Lens group, camera module and electronic device |
-
2018
- 2018-09-21 CN CN201821546613.5U patent/CN209070213U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110568600A (en) * | 2019-08-28 | 2019-12-13 | 深圳市灿锐科技有限公司 | Variable-working-distance variable-magnification telecentric lens and use method thereof |
| CN111399347A (en) * | 2020-05-15 | 2020-07-10 | 安徽国芯智能装备有限公司 | Illumination area continuously adjustable uniform illumination system |
| CN111399347B (en) * | 2020-05-15 | 2021-03-23 | 安徽国芯智能装备有限公司 | Illumination area continuously adjustable uniform illumination system |
| WO2022062609A1 (en) * | 2020-09-25 | 2022-03-31 | Oppo广东移动通信有限公司 | Lens group, camera module and electronic device |
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