JPS6480906A - Infrared-light and radio wave separating plate - Google Patents
Infrared-light and radio wave separating plateInfo
- Publication number
- JPS6480906A JPS6480906A JP23841287A JP23841287A JPS6480906A JP S6480906 A JPS6480906 A JP S6480906A JP 23841287 A JP23841287 A JP 23841287A JP 23841287 A JP23841287 A JP 23841287A JP S6480906 A JPS6480906 A JP S6480906A
- Authority
- JP
- Japan
- Prior art keywords
- radio wave
- layered film
- layers
- infrared light
- dielectric
- 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.)
- Pending
Links
Landscapes
- Optical Elements Other Than Lenses (AREA)
- Optical Filters (AREA)
- Aerials With Secondary Devices (AREA)
- Details Of Aerials (AREA)
Abstract
PURPOSE:To separate infrared light and a radio wave by reflection and transmission by loading a dielectric multi-layered film which reflects the infrared light on a dielectric substrate of proper thickness which transmits the radio wave. CONSTITUTION:The substrate 1 is made of such calcium fluoride that the product of its thickness and refractive index is an integral multiple of a half of the wavelength of the radio wave and the dielectric multi-layered film 2 has double structure formed by joining a 1st 1/4-wavelength multi-layered film 3 as a 15-layers laminate of alternate magnesium fluoride layers 3a whose optical thickness is 1/4 as large as 3.44mum and zinc sulfide layers 3b with a 2nd 1/4 wavelength multi-layered film 4 formed by laminating magnesium fluoride layers 4a whose optical thickness is 1/4 as large as 4.56mum and zinc sulfide layers 4b alternately by 15 layers in total through the joining layer consisting of a zinc sulide layer 5 whose optical thickness is 1/4 as large as 4mum. Consequently, the infrared light is reflected by the dielectric multi-layered film and the radio wave is transmitted through the dielectric multi-layered film and dielectric substrate, so that the infrared light and radio wave can be separated from each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23841287A JPS6480906A (en) | 1987-09-22 | 1987-09-22 | Infrared-light and radio wave separating plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23841287A JPS6480906A (en) | 1987-09-22 | 1987-09-22 | Infrared-light and radio wave separating plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6480906A true JPS6480906A (en) | 1989-03-27 |
Family
ID=17029824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23841287A Pending JPS6480906A (en) | 1987-09-22 | 1987-09-22 | Infrared-light and radio wave separating plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6480906A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02274102A (en) * | 1989-04-17 | 1990-11-08 | Tech Res & Dev Inst Of Japan Def Agency | Dome for airframe |
| US5000527A (en) * | 1988-12-08 | 1991-03-19 | British Aerospace Public Limited Company | Multiple waveband optical element |
| JPH0389201A (en) * | 1989-08-31 | 1991-04-15 | Toshiba Glass Co Ltd | Multilayered light interference film |
| JPH05273472A (en) * | 1992-01-21 | 1993-10-22 | Hughes Aircraft Co | Light observation and near-infrared-ray tracking system for portable missile firing device |
| JPH06281811A (en) * | 1993-03-29 | 1994-10-07 | Nec Corp | Dome |
| JP2004502978A (en) * | 2000-07-10 | 2004-01-29 | テヒニシェ・ウニベルジテート・ブラウンシュバイク・カロロ−ビルヘルミナ | Optical element |
| EP1643180A1 (en) * | 2003-07-04 | 2006-04-05 | Matsushita Electric Industrial Co., Ltd. | Vacuum thermal insulation material and equipment using the same |
-
1987
- 1987-09-22 JP JP23841287A patent/JPS6480906A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5000527A (en) * | 1988-12-08 | 1991-03-19 | British Aerospace Public Limited Company | Multiple waveband optical element |
| JPH02274102A (en) * | 1989-04-17 | 1990-11-08 | Tech Res & Dev Inst Of Japan Def Agency | Dome for airframe |
| JPH0389201A (en) * | 1989-08-31 | 1991-04-15 | Toshiba Glass Co Ltd | Multilayered light interference film |
| JPH05273472A (en) * | 1992-01-21 | 1993-10-22 | Hughes Aircraft Co | Light observation and near-infrared-ray tracking system for portable missile firing device |
| JPH06281811A (en) * | 1993-03-29 | 1994-10-07 | Nec Corp | Dome |
| JP2004502978A (en) * | 2000-07-10 | 2004-01-29 | テヒニシェ・ウニベルジテート・ブラウンシュバイク・カロロ−ビルヘルミナ | Optical element |
| EP1643180A1 (en) * | 2003-07-04 | 2006-04-05 | Matsushita Electric Industrial Co., Ltd. | Vacuum thermal insulation material and equipment using the same |
| EP1643180A4 (en) * | 2003-07-04 | 2010-08-25 | Panasonic Corp | THERMAL INSULATION MATERIAL AND EQUIPMENT USING THE SAME |
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