CN2338755Y - Radial graduated filter - Google Patents
Radial graduated filter Download PDFInfo
- Publication number
- CN2338755Y CN2338755Y CN 98233083 CN98233083U CN2338755Y CN 2338755 Y CN2338755 Y CN 2338755Y CN 98233083 CN98233083 CN 98233083 CN 98233083 U CN98233083 U CN 98233083U CN 2338755 Y CN2338755 Y CN 2338755Y
- Authority
- CN
- China
- Prior art keywords
- filter
- model
- utility
- light
- optical instrument
- 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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Abstract
The utility model relates to a radial graduated filter. The utility model is characterized in that the light filter on the filter forms a convex shape, the center is thick, and the edge is thin; the intensity of the light of a point light source can be changed to be consistent after passing through the light filter, and the problem of the point light source that the light intensity is not consistent can be solved; thereby, the utility model has the advantages of size reducing for the optical instrument, light weight, low cost, simple structure, and easy manufacture. The utility model is especially suitable for the optical instrument whose objective lens having a large view field angle.
Description
The utility model belongs to the improvement of optical lightscreening lens structure.
The illumination of its image planes of optical instrument that the objective angular field angle is big is very inhomogeneous, and is especially all the more so in amplification system.Generally all adopt area source to solve the homogeneity of illumination, but brought whole optics instrument body long-pending huge.Heavy Weight, carry shortcomings such as inconvenience, cost height, especially under the condition of optical instrument, adopt area source then can't meet the demands weight finite volume system.Though pointolite can cause the unevenness of illumination, it can make volume-diminished, weight saving, the cost of optical instrument reduce.
The purpose of this utility model is exactly to design a kind of optical filtering of radially gradual change, to solve the even problem of pointolite uneven illumination.
The technical scheme of the designed radially graduated filter of the utility model is as follows, and the filter coating on the filter glass is made the thin overshooting shape of center webbing portion, promptly along with the increase gradually of filter glass radius, and the attenuation gradually of the thickness of filter coating.
By technical solutions of the utility model as can be seen, because webbing is thin in the filter coating on the designed optical filtering, make pointolite light become unanimity through intensity behind the graduated filter radially, solved the even problem of pointolite uneven illumination, thereby volume-diminished, weight saving, the cost of optical instrument are reduced, and the utlity model has simple in structure, the easy advantage of making.
Accompanying drawing 1 is the structural representation of the designed radially graduated filter of the utility model, and 1 is the filter glass substrate among the figure, and 2 is filter membranous layer.
Describe the realization the technical solution of the utility model in detail below in conjunction with accompanying drawing.
Referring to accompanying drawing, the designed radially graduated filter of the utility model is by eyeglass substrate and filter membranous layer be combined into, and used backing material is identical with existing optical filter with film material, only is the method for making difference of rete.The filter membranous layer of the utility model optical filtering adopts the mode of vacuum evaporation to finish, requirement separates the evaporation source and the eyeglass substrate of Coating Materials with dividing plate, have the evaporation aperture at the dividing plate middle part, and make the centrally aligned evaporation aperture of eyeglass substrate, after vacuumizing, deposition material impacts on the top layer, center of substrate by the evaporation aperture, and toward the diffusion of limit portion, along with the accumulation nature has just formed the thin rete of middle webbing; Can be better if substrate is rotated the rete effect of its evaporation along the center.The use of the radially graduated filter that the utility model is designed is before placing it in the object lens of optical instrument.Certainly the distance of the thickness of rete and pointolite and intensity and object lens size are relevant.
Claims (1)
1. a graduated filter radially is to be combined with filter membranous layer by the eyeglass substrate to constitute, and it is characterized in that, the filter membranous layer on the eyeglass substrate is the thin overshooting shape of center webbing portion, promptly along with the increase of filter glass radius, and the attenuation gradually of the thickness of filter coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98233083 CN2338755Y (en) | 1998-10-20 | 1998-10-20 | Radial graduated filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98233083 CN2338755Y (en) | 1998-10-20 | 1998-10-20 | Radial graduated filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2338755Y true CN2338755Y (en) | 1999-09-15 |
Family
ID=33981890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98233083 Expired - Fee Related CN2338755Y (en) | 1998-10-20 | 1998-10-20 | Radial graduated filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2338755Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI497061B (en) * | 2009-04-30 | 2015-08-21 | Corning Inc | Method and apparatus for detecting defects in glass sheet |
-
1998
- 1998-10-20 CN CN 98233083 patent/CN2338755Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI497061B (en) * | 2009-04-30 | 2015-08-21 | Corning Inc | Method and apparatus for detecting defects in glass sheet |
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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 |