FR2368724A1 - Multi-spectral two-component window - mfd. from alkali halide monocrystal covered with polymer film - Google Patents
Multi-spectral two-component window - mfd. from alkali halide monocrystal covered with polymer filmInfo
- Publication number
- FR2368724A1 FR2368724A1 FR7631483A FR7631483A FR2368724A1 FR 2368724 A1 FR2368724 A1 FR 2368724A1 FR 7631483 A FR7631483 A FR 7631483A FR 7631483 A FR7631483 A FR 7631483A FR 2368724 A1 FR2368724 A1 FR 2368724A1
- Authority
- FR
- France
- Prior art keywords
- pref
- transparent
- polymer film
- alkali halide
- mfd
- 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.)
- Granted
Links
- 239000003513 alkali Substances 0.000 title abstract 2
- 150000004820 halides Chemical class 0.000 title abstract 2
- 229920006254 polymer film Polymers 0.000 title 1
- 239000000463 material Substances 0.000 abstract 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 2
- 239000004698 Polyethylene Substances 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 229920000620 organic polymer Polymers 0.000 abstract 1
- -1 polyethylene Polymers 0.000 abstract 1
- 229920000573 polyethylene Polymers 0.000 abstract 1
- 239000011780 sodium chloride Substances 0.000 abstract 1
- 230000003595 spectral effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
A multi spectral window, transparent to a large range of wavelengths, is made of two materials, both transparent from 0.4 to 13 microns. The first material has good mechanical rigidity, and the second, which encloses the first, and is pref. in direct contact with it, has good resistance to natural agents. The first material is pref. a monocrystal of an alkali halide, partic. NaCl or KCl, in the form of a parallel sided sheet. The second material is pref. an organic polymer film, partic. polyethylene terphthalate, and it pref. has a refractive index intermediate between the first material and air. Enclosure of the first material by the second can be done under vacuum, or by heavy shrinkage in an oven. The window solves the problem, more easily than other methods, at providing a material simultaneously transparent to visible, near infra-red, and middle infra-red wavelengths. It can thus be used for laser telemetry, missible guiding, thermal image systems, laser illuminators, etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7631483A FR2368724A1 (en) | 1976-10-20 | 1976-10-20 | Multi-spectral two-component window - mfd. from alkali halide monocrystal covered with polymer film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7631483A FR2368724A1 (en) | 1976-10-20 | 1976-10-20 | Multi-spectral two-component window - mfd. from alkali halide monocrystal covered with polymer film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2368724A1 true FR2368724A1 (en) | 1978-05-19 |
| FR2368724B1 FR2368724B1 (en) | 1981-07-10 |
Family
ID=9178966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7631483A Granted FR2368724A1 (en) | 1976-10-20 | 1976-10-20 | Multi-spectral two-component window - mfd. from alkali halide monocrystal covered with polymer film |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2368724A1 (en) |
-
1976
- 1976-10-20 FR FR7631483A patent/FR2368724A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2368724B1 (en) | 1981-07-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |