CN2862067Y - Imagery orthostigmat - Google Patents
Imagery orthostigmat Download PDFInfo
- Publication number
- CN2862067Y CN2862067Y CNU2005200318167U CN200520031816U CN2862067Y CN 2862067 Y CN2862067 Y CN 2862067Y CN U2005200318167 U CNU2005200318167 U CN U2005200318167U CN 200520031816 U CN200520031816 U CN 200520031816U CN 2862067 Y CN2862067 Y CN 2862067Y
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- CN
- China
- Prior art keywords
- lens
- object lens
- wide
- diaphragm
- utility
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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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
- G02B13/04—Reversed telephoto objectives
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only
- G02B9/58—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only arranged - + + -
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The utility model discloses a wide-angle camera lens, which consists of four lenses and lens diaphragm. Counting from the objective lens, the first lens is meniscus minus lens that can remarkably decrease the slope angle of the off-axis beam with the primary axis after passing through the minus lens; and the other three are objective lenses that increase relative aperture and make picture field illumination intensity to slowly decrease to achieve substantially uniform speed. The utility model has the advantages of improved imaging, high image resolution, uniform illumination intensity, low cost, and good performance.
Description
Technical field:
The utility model belongs to the optical instrument technical field, is a kind of wide-angle camera.
Background technology:
It is low that existing wide-angle camera exists imaging definition, and the limit of visual field looks like to have dark angle, and this wide-angle camera also is mainly derived from import, and therefore the material price height that it is selected, exists and cost an arm and a leg, and it is not enough that product quality can not meet the demands etc.
Summary of the invention:
The purpose of this utility model is the design wide-angle camera that a kind of imaging is clear, illumination is even, cost is low.
For reaching above-mentioned purpose, the main technical schemes that the utility model is taked is: have microscope base, end cap, it is characterized in that in microscope base, being provided with four object lens and a fixed aperture, based on the counter basis of taking the photograph type object lens far away from the object space number, first object lens one is the bent moon negative lens, an outer light beam is reduced greatly with angle of main shaft inclination behind negative lens, the back group is three lens objective, object lens two are the biconvex positive lens, and object lens three are the biconvex positive lens, and object lens four are the convex-concave negative lens, wherein be provided with cemented surface between 34 two object lens, fixed aperture is between object lens one and object lens two.Group has improved relative aperture after three.Make visual field illumination even.
Optical characteristics: focal length F=5.9mm, field angle 2W=64 °, relative aperture F=2, rear cut-off distance LF=7.2mm.Above-mentioned object lens, fixed aperture satisfy following data:
Structural parameters: radius r thickness d material n
Object lens one 6.0～6.5
3.0～3.5 1～1.5 nd＝1.62?vd＝60.3
Diaphragm 0 7.0～8.0
Object lens two-14.5～-15.5 0～0.5
-6.2～-6.8 2.5～3.5 nd＝1.71?vd＝53.8
Object lens four-5.3～-5.8 3.8～4.8 nd=1.70 vd=56.2
-45～-60 0.2～1 nd＝1.85?vd＝23.8
According to the burnt large-field shooting camera lens of weak point that such scheme is made, when the optical transfer function mtf value was 60lp/mm in spatial frequency, the center reached 0.6, and the edge reaches 0.3.The bright effect of visual field codamine, field of view edge relative exposure have and can improve imaging greater than 60%, the imaging definition height, and illumination is even, can reduce cost remarkable advantages such as function admirable.
Reach example in conjunction with the accompanying drawings and further describe specific embodiments of the present utility model.
Description of drawings:
Fig. 1 is a general assembly structural representation of the present utility model.
Fig. 2 is the embodiment synoptic diagram of utility model.
Embodiment:
Referring to Fig. 1, the utility model wide-angle camera comprises: end cap 1, microscope base 2, spacer ring 3, spacer ring 4, object lens 45, object lens 36, object lens 27, object lens 1.Object lens 1, object lens 27, object lens 36, object lens 45 are by spacer ring 3, and spacer ring 4 is contained in the microscope base 2, and the front end of object lens 1 is equipped with end cap 1, adopts light-sensitive emulsion bonding between object lens 36 and the object lens 45.
Referring to Fig. 2, from object space, object lens 1 are the bent moon negative lens, are positioned at the top of camera lens; Object lens 27 are the biconvex positive lens, and object lens 36 are the biconvex positive lens, and object lens 45 are the convex-concave negative lens, and said diaphragm is between object lens 1 and object lens 27.
Optical characteristics: focal length F=5.9mm, field angle 2W=64 °, relative aperture F=2, rear cut-off distance LF=7.2mm, above-mentioned object lens, fixed aperture satisfy following data:
Concrete structure data one:
Radius r thickness d material n
Object lens one R
16.0
R
2?3.0 1 nd＝1.62?vd＝60.3
Diaphragm 0 7.0
Object lens two R
3-14.5 0
R
4?-6.2 2.5 nd＝1.71?vd＝53.8
Object lens three R
58.5 0
Object lens four R
6-5.3 3.8 nd=1.70 vd=56.2
R
7?-45 0.2 nd＝1.85?vd＝23.8
Concrete structure data two:
Radius r thickness d material n
Object lens one R
16.5
R
2?3.5 1.5 nd＝1.62?vd＝60.3
Diaphragm 0 8.0
Object lens two R
3-15.5 0.5
R
4?-6.8 3.5 nd＝1.71?vd＝53.8
Object lens three R
59.5 0.5
Object lens four R
6-5.8 4.8 nd=1.70 vd=56.2
R
7?-60 1 nd＝1.85?vd＝23.8
Claims (3)
1, a kind of wide-angle camera, have microscope base [2], end cap [1] is characterized in that being provided with four object lens and a diaphragm in microscope base [2], from the object space number, first object lens one [8] is the bent moon negative lens, is positioned at camera lens top, and object lens two [7] are the biconvex positive lens, object lens three [6] are the biconvex positive lens, object lens four [5] are the convex-concave negative lens, and diaphragm is between object lens one [8] and object lens two [7], wherein is provided with cemented surface between two object lens three [6] and object lens four [5].
2,, it is characterized in that described camera lens meets the following conditions: focal length F=5.9mm, field angle 2W=64 °, relative aperture F=2, rear cut-off distance LF=7.2mm according to a kind of wide-angle camera of claim 1.
3,, it is characterized in that described camera lens meets the following conditions according to a kind of wide-angle camera of claim 1:
Structural parameters: radius r thickness d material n
Object lens one 6.0～6.5
3.0～3.5 1～1.5 nd＝1.62 vd＝60.3
Diaphragm 0 7.0～8.0
Object lens two-14.5～-15.5 0～0.5
-6.2～-6.8 2.5～3.5 nd＝1.71 vd＝53.8
Object lens 3 8.5～9.5 0～0.5
Object lens four-5.3～-5.8 3.8～4.8 nd=1.70 vd=56.2
-45～-60 0.2～1 nd＝1.85 vd＝23.8。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200318167U CN2862067Y (en) | 2005-09-08 | 2005-09-08 | Imagery orthostigmat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200318167U CN2862067Y (en) | 2005-09-08 | 2005-09-08 | Imagery orthostigmat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2862067Y true CN2862067Y (en) | 2007-01-24 |
Family
ID=37659698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200318167U Expired - Fee Related CN2862067Y (en) | 2005-09-08 | 2005-09-08 | Imagery orthostigmat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2862067Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102819084A (en) * | 2012-08-27 | 2012-12-12 | 福建福光数码科技有限公司 | High-speed pick-up lens |
| CN104849836A (en) * | 2015-06-06 | 2015-08-19 | 中山市弘景光电科技有限公司 | Intelligent monitoring shooting optical system and lens applying same |
-
2005
- 2005-09-08 CN CNU2005200318167U patent/CN2862067Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102819084A (en) * | 2012-08-27 | 2012-12-12 | 福建福光数码科技有限公司 | High-speed pick-up lens |
| CN102819084B (en) * | 2012-08-27 | 2016-01-20 | 福建福光股份有限公司 | High-speed camera camera lens |
| CN104849836A (en) * | 2015-06-06 | 2015-08-19 | 中山市弘景光电科技有限公司 | Intelligent monitoring shooting optical system and lens applying same |
| CN104849836B (en) * | 2015-06-06 | 2017-03-08 | 广东弘景光电科技股份有限公司 | A kind of intelligent monitoring image pickup optical system and its camera lens of application |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070124 |