CN2590034Y - Venetian blind type lens shade - Google Patents
Venetian blind type lens shade Download PDFInfo
- Publication number
- CN2590034Y CN2590034Y CN 02292549 CN02292549U CN2590034Y CN 2590034 Y CN2590034 Y CN 2590034Y CN 02292549 CN02292549 CN 02292549 CN 02292549 U CN02292549 U CN 02292549U CN 2590034 Y CN2590034 Y CN 2590034Y
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- CN
- China
- Prior art keywords
- shadow shield
- group
- lateral surface
- light
- shield
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model relates to a shutter type light shield. One side of the outer lateral surface of an inner light shielding barrel is provided with a group of light screens, the outer lateral surface of the inner light shielding barrel and the other side of the group of the light screens which are symmetrical are provided with the other group of the light screens, and a centerline of the light screens is taken as a symmetrical centerline. The utility model is provided with a group of light screens which are parallel to the centerline on the upper lateral surface of the outer lateral surface of the inner light shielding barrel, and a group of light screens which are parallel to the centerline on the lower lateral surface of the outer lateral surface of the inner light shielding barrel; therefore, outside parasitic light is shielded from irradiating into the light shielding barrel, and the utility model ensures that the static transfer function of a camera is not smaller than 0.2. The utility model has the advantages of reasonable design, simpler structure, good inhibiting effect on the parasitic light, etc., and the utility model can be popularized and used for optical systems of various spaces.
Description
Technical field
The utility model belongs to device or the device technique field that is used to control light intensity, color, phase place, polarization or direction, is specifically related to the venetian blind type light shield.
Background technology
The Space Optical System great majority are operated under the more intense rugged surroundings of figure viewed from behind light outside the system visual field.Some large space telescopes for example, some is operated under the strong sun background star observation optical system, and the sun just becomes light source outside the very strong visual field.If veiling glare is not effectively suppressed, the target picture will be flooded or reduce the contrast of picture by strong non-imaging beam, causes that the target picture blurs and can't survey.In fact because veiling glare suppresses the development that research lags behind detector and diffraction limit optical system, to such an extent as to the veiling glare problem oneself had a strong impact on the development of others.If detector and design of Optical System are all very successful, but cause the failure of whole task because do not solve the inhibition of parasitic light well, this shows parasitic light inhibition oneself become one of light key technology in the space optics.But the device and the equipment that up to the present, also do not have more complete elimination space parasitic light.
Summary of the invention
Technical problem underlying to be solved in the utility model and solve the technical scheme that its technical matters adopts and be: the side at interior cone lateral surface is provided with one group of shadow shield, is provided with another group shadow shield at interior cone lateral surface and this group shadow shield with the symmetrical opposite side of center line.
Cone is the truncated cone-shaped tube in of the present utility model.
One group of shadow shield of the present utility model at least two with the parallel plate object of interior cone center line, be arranged on the different circumferencial direction side of interior cone lateral surface.
Shadow shield of the present utility model is the arc-shaped surface plate object.
The equal in length of shadow shield of the present utility model, in one group of shadow shield, the radial distance of a shadow shield and an adjacent shadow shield is 8～40mm.
The utility model has adopted the upper side at interior cone lateral surface that the one group shadow shield parallel with center line is installed, downside at interior cone lateral surface is equipped with the one group shadow shield parallel with center line, shelter from extraneous veiling glare and injected in the cone, guaranteed static transport function 〉=0.2 of camera.It has advantages such as reasonable in design, that structure is simple, the veiling glare inhibition is effective, can promote the use of in various Space Optical System.
Description of drawings
Fig. 1 is the cut-open view of an embodiment of the utility model.
Fig. 2 is the left view of Fig. 1.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described, but the utility model is not limited to these embodiment.
Embodiment 1
In Fig. 1,2, the venetian blind type light shield of present embodiment is to be connected by interior cone 1, shadow shield 2 to constitute.Interior cone 1 be shaped as truncated cone-shaped, on the lateral surface of interior cone 1, two groups of shadow shields are installed symmetrically about interior cone 1 center line, each group shadow shield has 4 shadow shields 2, shadow shield 2 be shaped as the arc-shaped curved surface plate, on the circular arc camber of the different circumference of cone 1 lateral surface, a shadow shield 2 is parallel with an adjacent shadow shield 2, the equal in length of shadow shield 2 in being installed in, in one group of shadow shield, the radial distance of a shadow shield 2 and an adjacent shadow shield 2 is 25mm.
Because the shadow shield 2 of this venetian blind type of the utility model has sheltered from extraneous veiling glare and injected on the image planes of anorthopia field, make final static transport function 〉=0.2 of optical system.
Embodiment 2
In the present embodiment, in one group of shadow shield, the radial distance of a shadow shield 2 and an adjacent shadow shield 2 is 8mm.Connecting relation between other parts and the part is identical with embodiment 1.
Embodiment 3
In the present embodiment, in one group of shadow shield, the radial distance of a shadow shield 2 and an adjacent shadow shield 2 is 8mm.Connecting relation between other parts and the part is identical with embodiment 1.
Claims (6)
1, a kind of venetian blind type light shield is characterized in that: the side at interior cone [1] lateral surface is provided with one group of shadow shield, is provided with another group shadow shield at interior cone [1] lateral surface and this group shadow shield with the symmetrical opposite side of center line.
2, according to the described venetian blind type light shield of claim 1, it is characterized in that: cone [1] is the truncated cone-shaped tube in said.
3, according to the described venetian blind type light shield of claim 1, it is characterized in that: said one group of shadow shield at least two with the parallel plate object of interior cone center line, be arranged on the different circumferencial direction side of interior cone lateral surface.
4, according to claim 1 or 3 described venetian blind type light shields, it is characterized in that: said shadow shield [2] is the arc-shaped surface plate object.
5, according to claim 1 or 3 described venetian blind type light shields, it is characterized in that: the equal in length of said shadow shield, in one group of shadow shield, a shadow shield [2] is 8～40mm with the radial distance of an adjacent shadow shield [2].
6, according to the described venetian blind type light shield of claim 4, it is characterized in that: the equal in length of said shadow shield, in one group of shadow shield, a shadow shield [2] is 8～40mm with the radial distance of an adjacent shadow shield [2].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02292549 CN2590034Y (en) | 2002-12-30 | 2002-12-30 | Venetian blind type lens shade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02292549 CN2590034Y (en) | 2002-12-30 | 2002-12-30 | Venetian blind type lens shade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2590034Y true CN2590034Y (en) | 2003-12-03 |
Family
ID=33750842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02292549 Expired - Fee Related CN2590034Y (en) | 2002-12-30 | 2002-12-30 | Venetian blind type lens shade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2590034Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100498422C (en) * | 2007-12-21 | 2009-06-10 | 中国科学院上海技术物理研究所 | Design method for large visual field optical system lens hood with scan mirror |
| CN102243414A (en) * | 2010-11-26 | 2011-11-16 | 北京空间机电研究所 | Reflective star sensor light shield |
| CN102998796A (en) * | 2012-12-17 | 2013-03-27 | 中国人民解放军空军预警学院 | Front hood design method of arbitrary two-dimensional pointing system with large observation field |
| CN103309123A (en) * | 2013-06-26 | 2013-09-18 | 郭社健 | Three-dimensional (3D) camera lens hood capable of preventing light leak |
| CN109387994A (en) * | 2017-08-04 | 2019-02-26 | 北京空间机电研究所 | A kind of secondary mirror hood for space large caliber camera |
| CN112068383A (en) * | 2020-09-18 | 2020-12-11 | 长光卫星技术有限公司 | Stray light eliminating assembly suitable for off-axis three-reflection wide-width remote sensing camera |
-
2002
- 2002-12-30 CN CN 02292549 patent/CN2590034Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100498422C (en) * | 2007-12-21 | 2009-06-10 | 中国科学院上海技术物理研究所 | Design method for large visual field optical system lens hood with scan mirror |
| CN102243414A (en) * | 2010-11-26 | 2011-11-16 | 北京空间机电研究所 | Reflective star sensor light shield |
| CN102998796A (en) * | 2012-12-17 | 2013-03-27 | 中国人民解放军空军预警学院 | Front hood design method of arbitrary two-dimensional pointing system with large observation field |
| CN102998796B (en) * | 2012-12-17 | 2015-03-04 | 中国人民解放军空军预警学院 | Front hood design method of arbitrary two-dimensional pointing system with large observation field |
| CN103309123A (en) * | 2013-06-26 | 2013-09-18 | 郭社健 | Three-dimensional (3D) camera lens hood capable of preventing light leak |
| CN103309123B (en) * | 2013-06-26 | 2016-05-25 | 郭社健 | Can prevent the 3D video camera light shield of light leak |
| CN109387994A (en) * | 2017-08-04 | 2019-02-26 | 北京空间机电研究所 | A kind of secondary mirror hood for space large caliber camera |
| CN112068383A (en) * | 2020-09-18 | 2020-12-11 | 长光卫星技术有限公司 | Stray light eliminating assembly suitable for off-axis three-reflection wide-width remote sensing camera |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |