CN205374789U - Working wavelength range is 3900 -5500nm's well infrared band pass filter - Google Patents
Working wavelength range is 3900 -5500nm's well infrared band pass filter Download PDFInfo
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- CN205374789U CN205374789U CN201620081799.6U CN201620081799U CN205374789U CN 205374789 U CN205374789 U CN 205374789U CN 201620081799 U CN201620081799 U CN 201620081799U CN 205374789 U CN205374789 U CN 205374789U
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Abstract
The utility model discloses a working wavelength range is 3900 -5500nm's well infrared band pass filter, including front film layer system, substrate and rear surface film system, front film layer system is superposeed in turn by zinc sulphide layer and germanium rete and constitutes, zinc sulphide layer and germanium rete are totally 26 layers, rear surface film system is superposeed in turn by zinc sulphide layer and germanium rete and constitutes, zinc sulphide layer and germanium rete are totally 40 layers. The utility model provides an infrared band pass filter has high transmissivity, and ends at other wave band height in the working wavelength range 3.9 -5.5 micron.
Description
Technical field
This utility model relates to a kind of bandpass filter, particularly to the mid-infrared bandpass filter that a kind of service band is 3900-5500nm.
Background technology
Bandpass filter is a kind of high absorbance that a certain wave band is had, and the optical filter that the band height at its two ends is ended.Mid-infrared bandpass filter is within the scope of middle infrared wavelength, has higher transmitance in centre wavelength, and ends at all the other wave bands.It is mainly used in infrared spectrum detection system, has very important application at space industry.Along with the development of space infrared technique, the waveform requirements of infrared band pass filter is also more and more higher, it is desirable to be able to effectively filter out background spurious signal, improve the signal to noise ratio of detection system.It addition, except the high request to optical filter optical characteristics, infrared fileter rete reliability is also had high requirement at field of space technology, current alternative infrared fileter film material kind is little, still has very big difficulty in the preparation.
Utility model content
This utility model is for overcoming the deficiencies in the prior art, it is provided that a kind of service band is the mid-infrared bandpass filter of 3900-5500nm.
For reaching above-mentioned purpose, this utility model adopts the following technical scheme that:
A kind of service band is the mid-infrared bandpass filter of 3900-5500nm, and including front side films system, substrate and back side film system, described front side films system is replaced superposition by zinc sulfide layer and germanium rete and forms, described zinc sulfide layer and germanium rete totally 26 layers；Described back side film system is replaced superposition by zinc sulfide layer and germanium rete and forms, described zinc sulfide layer and germanium rete totally 40 layers.
Further, described substrate is germanio sheet, and described substrate thickness is 0.3mm.
Hinge structure, the beneficial effects of the utility model are:
Infrared band pass filter in this utility model, has high transmitance in service band 3.9-5.5 micron, and ends in other band height.
Accompanying drawing explanation
Fig. 1 is the structural representation of the mid-infrared bandpass filter that a kind of service band is 3900-5500nm described in this utility model one embodiment；
Fig. 2 is the front side films system transmittance curve figure described in this utility model one embodiment；
Fig. 3 is the anti-face mask series transmittance curve figure described in this utility model one embodiment；
Fig. 4 is the transmittance curve transmittance curve figure of the mid-infrared bandpass filter that service band is 3900-5500nm described in this utility model one embodiment.
Accompanying drawing labelling
1-front side films system；2-substrate；3-back side film system.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described in further detail, to make those skilled in the art can implement according to this with reference to description word.
Consulting Fig. 1, a kind of service band is the mid-infrared bandpass filter of 3900-5500nm, including front side films be 1, substrate 2 and back side film be 3, described front side films is 1 replaced superposition by zinc sulfide layer and germanium rete and form, described zinc sulfide layer and germanium rete totally 26 layers；Described back side film is 3 replaced superposition by zinc sulfide layer and germanium rete and form, described zinc sulfide layer and germanium rete totally 40 layers.
Described substrate 2 is germanio sheet, and described substrate 2 thickness is 0.3mm.Described germanio sheet polishing both surfaces, two faces are coated with front side films system and anti-face mask series respectively.
As an embodiment of the present utility model, front side films is 1 is cut film system after 5.5 microns: λ=6.2 μm, H representative thickness is λ0The germanium rete of/4, L representative thickness is λ0The ZnS rete of/4.
Wherein front side films is 1 mainly consists of:
0.2H0.095L0.25H1.134L1.063H1.003L0.988H0.976L0.972H0.967L0.97H0.963L0.971H0.962L0.974H0.966L0.979H0.973L0.987H0.986L1.002H1.007L1.038H1.057L1.097H0.55L
Front side films be 1 transmittance curve as shown in Figure 2.
Anti-face mask series 3 is cut film system before 3.9 microns, λ=2.884 μm, and H representative thickness is λ0The germanium rete of/4, L is representative thickness is λ0The ZnS rete of/4.
Mainly consisting of of anti-face mask series 3:
0.2H0.416L1.004H0.985L1.02H0.933L0.986H1.231L1.025H0.852L1.287H0.96L1.192H0.806L1.169H0.762L0.571H0.501L0.906H0.832L0.985H0.778L0.681H0.392L0.953H0.838L0.641H0.71L0.449H0.552L0.867H0.141L0.579H0.823L0.61H0.812L0.51H0.257L1.683H1.609L
Anti-face mask series 3 transmittance curve is as described in Figure 3.
When front side films system and anti-face mask series are plated on substrate, the transmittance curve of the mid-infrared bandpass filter finally given is as shown in Figure 4.
This optical filter is at visible ray-3.5 μm, absolute transmitance≤1.0%；
In 3.6-3.7 μ m, transmitance≤5.0%；
At 3.85-3.95 μm with in 5.5 5.6 μ m, transmitance=50%；
In 4.05-5.2 μ m, absolute transmitance >=90%；
At 5.3 μm of places, transmitance >=80%；
In 5.7-6 μ m, transmitance≤5.0%.
Infrared band pass filter in this patent, has high transmitance in service band 3.9-5.5 μm, and ends in other band height.
Although embodiment of the present utility model is disclosed as above, but listed utilization that it is not restricted in description and embodiment, it can be applied to various applicable field of the present utility model completely, for those skilled in the art, it is easily achieved other amendment, therefore, under the general concept limited without departing substantially from claim and equivalency range, this utility model is not limited to specific details and shown here as the legend with description.
Claims (2)
1. a service band is the mid-infrared bandpass filter of 3900-5500nm, it is characterised in that including front side films system, substrate and back side film system, described front side films system is replaced superposition by zinc sulfide layer and germanium rete and forms, described zinc sulfide layer and germanium rete totally 26 layers；Described back side film system is replaced superposition by zinc sulfide layer and germanium rete and forms, described zinc sulfide layer and germanium rete totally 40 layers.
2. service band is the mid-infrared bandpass filter of 3900-5500nm according to claim 1, it is characterised in that described substrate is germanio sheet, and described substrate thickness is 0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620081799.6U CN205374789U (en) | 2016-01-28 | 2016-01-28 | Working wavelength range is 3900 -5500nm's well infrared band pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620081799.6U CN205374789U (en) | 2016-01-28 | 2016-01-28 | Working wavelength range is 3900 -5500nm's well infrared band pass filter |
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| CN205374789U true CN205374789U (en) | 2016-07-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175874A (en) * | 2020-02-20 | 2020-05-19 | 北京华北莱茵光电技术有限公司 | Intermediate infrared dual-waveband band-pass filter and preparation method thereof |
| CN114325911A (en) * | 2021-12-31 | 2022-04-12 | 苏州厚朴传感科技有限公司 | Intermediate infrared double-color optical filter and preparation method thereof |
| CN114355496A (en) * | 2021-12-30 | 2022-04-15 | 苏州厚朴传感科技有限公司 | Far infrared band filter with working wavelength band of 11500-12500nm |
-
2016
- 2016-01-28 CN CN201620081799.6U patent/CN205374789U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111175874A (en) * | 2020-02-20 | 2020-05-19 | 北京华北莱茵光电技术有限公司 | Intermediate infrared dual-waveband band-pass filter and preparation method thereof |
| CN111175874B (en) * | 2020-02-20 | 2021-10-22 | 北京华北莱茵光电技术有限公司 | Intermediate infrared dual-waveband band-pass filter and preparation method thereof |
| CN114355496A (en) * | 2021-12-30 | 2022-04-15 | 苏州厚朴传感科技有限公司 | Far infrared band filter with working wavelength band of 11500-12500nm |
| CN114355496B (en) * | 2021-12-30 | 2024-02-02 | 苏州厚朴传感科技有限公司 | Far infrared band filter with working wave band of 11500-12500nm |
| CN114325911A (en) * | 2021-12-31 | 2022-04-12 | 苏州厚朴传感科技有限公司 | Intermediate infrared double-color optical filter and preparation method thereof |
| CN114325911B (en) * | 2021-12-31 | 2024-01-30 | 苏州厚朴传感科技有限公司 | Middle-infrared double-color filter and preparation method thereof |
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Address after: 2-1-b, 2-2-b, phase III, Zhongxin Technology Industrial Park, no.6, Louyang Road, Suzhou Industrial Park, Jiangsu Province Patentee after: Suzhou Houpu Sensing Technology Co.,Ltd. Address before: 2-1-b, 2-2-b, phase III, Zhongxin Technology Industrial Park, no.6, Louyang Road, Suzhou Industrial Park, Jiangsu Province Patentee before: SUZHOU JINGXING PHOTOELECTRIC TECHNOLOGY CO.,LTD. |