CN204666952U - Optical filter system - Google Patents
Optical filter system Download PDFInfo
- Publication number
- CN204666952U CN204666952U CN201520257299.9U CN201520257299U CN204666952U CN 204666952 U CN204666952 U CN 204666952U CN 201520257299 U CN201520257299 U CN 201520257299U CN 204666952 U CN204666952 U CN 204666952U
- Authority
- CN
- China
- Prior art keywords
- collimation lens
- optical filter
- filter system
- light source
- 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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- Optical Filters (AREA)
Abstract
The utility model relates to a kind of optical filter system, mainly comprises light source (S), collimation lens (L
1), the first collimation lens (L
2) and the second collimation lens (L
3), set gradually light source (S), collimation lens (L according to optical path direction
1), the first collimation lens (L
2) and the second collimation lens (L
3), described first collimation lens (L
2) and the second collimation lens (L
3) between be provided with object plane (P
1), described first collimation lens (L
2) and the second collimation lens (L
3) between be provided with frequency plane (P
2), described second collimation lens (L
3) rear is provided with image planes (P
3).The design of optical filter system that the utility model provides be system based on 4f structure, can parasitic light be removed, more useful informations can be obtained, add resolution, take into account the function of filtering and impurity elimination ripple.
Description
Technical field
The utility model relates to a kind of optical filter system for filtering in infrared light readout, belongs to infrared imaging field.
Background technology
The thermal infrared imager detector of electricity reading method is utilized to mainly contain ferroelectric type, resistor-type thermal detector and pyroelectric detector.Wherein, the main material of ferroelectric type detector is lead zirconate titanate (PZT); The thermo-responsive unit of resistor-type thermal detector is thermistor, and its material is vanadium oxide and amorphous silicon mainly; And the main material of pyroelectric detector is barium strontium titanate.
In infrared light readout, filtering is a great problem of puzzlement industry always, in filtering, the filtering problem of stray wave is the most outstanding, generally, effectively can remove stray wave, can resolution be had influence on, and ensure that resolution just can not look after the filter effect of stray wave.
Utility model content
In order to overcome the deficiencies in the prior art, resolving the problem of prior art, making up the deficiency of existing existing product in the market.
The utility model provides a kind of optical filter system, optical filter system mainly comprises light source, collimation lens, the first collimation lens and the second collimation lens, light source, collimation lens, the first collimation lens and the second collimation lens is set gradually according to optical path direction, object plane is provided with between described first collimation lens and the second collimation lens, be provided with frequency plane between described first collimation lens and the second collimation lens, described second collimation lens rear is provided with image planes.
Preferably, above-mentioned light source is pointolite.
Preferably, above-mentioned frequency plane is the conjugate plane of light source.
Preferably, above-mentioned frequency plane front is provided with wave filter.
Preferably, above-mentioned collimation lens, the first collimation lens and the second collimation lens have identical focal length.
The design of optical filter system that the utility model provides be system based on 4f structure, can parasitic light be removed, more useful informations can be obtained, add resolution, take into account the function of filtering and impurity elimination ripple.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Reference numeral: S-light source; L
1-collimation lens; P
1-object plane; L
2-the first collimation lens; P
2-frequency plane; L
3-the second collimation lens; P
3-image planes; x
1-the first coordinate system transverse axis; y
1-the first coordinate system longitudinal axis; x
2-the second coordinate system transverse axis; y
2-the second coordinate system longitudinal axis; x
3-three-coordinate transverse axis; y
3-three-coordinate the longitudinal axis.
Embodiment
Understand for the ease of those of ordinary skill in the art and implement the utility model, below in conjunction with the drawings and the specific embodiments, the utility model being described in further detail.
As shown in Figure 1, the optical filter system that the utility model provides, mainly comprises light source S, collimation lens L
1, the first collimation lens L
2with the second collimation lens L
3, set gradually light source S, collimation lens L according to optical path direction
1, the first collimation lens L
2with the second collimation lens L
3, described first collimation lens L
2with the second collimation lens L
3between be provided with object plane P
1, described first collimation lens L
2with the second collimation lens L
3between be provided with frequency plane P
2, described second collimation lens L
3rear is provided with image planes P
3.
Wherein, light source S is pointolite.Frequency plane P
2it is the conjugate plane of light source S.Frequency plane P
2front is provided with wave filter.Collimation lens L
1, the first collimation lens L
2with the second collimation lens L
3have identical focal length, focal length is all f, P
1, P
2, P
3object plane, spectrum face and image planes frequently respectively.P
2the conjugate plane of electric light source S, therefore P
2p
1fourier transform.From P
2to P
3process be the process of Fourier transform again, P in this process
2on Spectrum Conversion be P
3on inverted image.At P
2spectrum plane place adds upper filter, removal parasitic light can be played, by effects such as more useful informations, therefore can increase resolution, the structure that a lot of light reads the optical read-out part of FPA system all copies 4f system, the differently composed multiple different playback mode of wave filter and modulation device.
The embodiment of the above is better embodiment of the present utility model; not limit concrete practical range of the present utility model with this; scope of the present utility model comprises and is not limited to this embodiment, and the equivalence change that all shapes according to the utility model, structure are done is all in protection domain of the present utility model.
Claims (5)
1. an optical filter system, is characterized in that: described optical filter system mainly comprises light source (S), collimation lens (L
1), the first collimation lens (L
2) and the second collimation lens (L
3), set gradually light source (S), collimation lens (L according to optical path direction
1), the first collimation lens (L
2) and the second collimation lens (L
3), described first collimation lens (L
2) and the second collimation lens (L
3) between be provided with object plane (P
1), described first collimation lens (L
2) and the second collimation lens (L
3) between be provided with frequency plane (P
2), described second collimation lens (L
3) rear is provided with image planes (P
3).
2. optical filter system according to claim 1, is characterized in that: described light source (S) is pointolite.
3. optical filter system according to claim 2, is characterized in that: described frequency plane (P
2) be the conjugate plane of light source (S).
4. optical filter system according to claim 1, is characterized in that: described frequency plane (P
2) front is provided with wave filter.
5. optical filter system according to claim 1, is characterized in that: described collimation lens (L
1), the first collimation lens (L
2) and the second collimation lens (L
3) there is identical focal length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520257299.9U CN204666952U (en) | 2015-04-21 | 2015-04-21 | Optical filter system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520257299.9U CN204666952U (en) | 2015-04-21 | 2015-04-21 | Optical filter system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204666952U true CN204666952U (en) | 2015-09-23 |
Family
ID=54137320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520257299.9U Expired - Fee Related CN204666952U (en) | 2015-04-21 | 2015-04-21 | Optical filter system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204666952U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175975A (en) * | 2020-01-16 | 2020-05-19 | 华东交通大学 | Near-to-eye display device for realizing large focal depth imaging |
-
2015
- 2015-04-21 CN CN201520257299.9U patent/CN204666952U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175975A (en) * | 2020-01-16 | 2020-05-19 | 华东交通大学 | Near-to-eye display device for realizing large focal depth imaging |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20160421 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |