Composite erosion resistant optical window

Details Composite erosion resistant optical window Composite erosion resistant optical window

1976-01-07

1978-02-07

Ansher, Harold

Stock material or miscellaneous articles

Surface property or characteristic of web, sheet or block

428432, 428539, 428911, 428913, 428918, B29D 1100, G02B 100, B32B 1706

Patent

active

040727823

ABSTRACT:
An optical window is provided, particularly for multispectral or broadband wavelength (visible and infrared) transmission, which is resistant to damage or erosion by high velocity raindrops or other adverse environmental conditions. The window consists of a substrate of material having the necessary optical properties for the desired spectral range, with a cladding or protective layer of material of high resistance to erosion or other damage bonded to the substrate by a glass bonding material. While any suitable materials meeting the optical and physical requirements may be used, the substrate may be a material such as zinc selenide with a protective layer of zinc sulfide bonded to the substrate by a thin layer of a chalcogenide glass.

REFERENCES:
patent: 2651584 (1953-09-01), Longini et al.
patent: 2688565 (1954-09-01), Raymond
patent: 2710274 (1955-07-01), Kuehl
patent: 2834689 (1958-05-01), Jupnik
patent: 3034916 (1962-05-01), Eshner
patent: 3176575 (1965-04-01), Socha
patent: 3922440 (1975-11-01), Wegwerth
patent: 3971874 (1976-07-01), Ohta et al.

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