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1. (WO1998053534) DEVICE FOR PROTECTING AN OPTICAL SYSTEM AGAINST EXCESS LUMINOSITY
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/053534 International Application No.: PCT/FR1998/001005
Publication Date: 26.11.1998 International Filing Date: 20.05.1998
Chapter 2 Demand Filed: 26.10.1998
IPC:
H01S 3/00 (2006.01)
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
S
DEVICES USING STIMULATED EMISSION
3
Lasers, i.e. devices for generation, amplification, modulation, demodulation, or frequency-changing, using stimulated emission, of infra-red, visible, or ultra-violet waves
Applicants:
AEROSPATIALE SOCIETE NATIONALE INDUSTRIELLE [FR/FR]; 37, boulevard de Montmorency F-75016 Paris, FR (AllExceptUS)
HUBERT-HABART, Christophe [FR/FR]; FR (UsOnly)
FOURNIER, Gilles [FR/FR]; FR (UsOnly)
Inventors:
HUBERT-HABART, Christophe; FR
FOURNIER, Gilles; FR
Agent:
BONNETAT, Christian; Cabinet Bonnetat 29, rue de Saint Pétersbourg F-75008 Paris, FR
Priority Data:
97/0630623.05.1997FR
Title (EN) DEVICE FOR PROTECTING AN OPTICAL SYSTEM AGAINST EXCESS LUMINOSITY
(FR) DISPOSITIF DE PROTECTION D'UN SYSTEME OPTIQUE CONTRE DES SURINTENSITES LUMINEUSES
Abstract:
(EN) The invention concerns a device for protecting an optical system (2) against the excess luminosity of an incident light beam (FO), comprising means (3) forming first and second light beams (F1, F2), and reflecting means (4), the first beam (F1) being guided towards the optical system (2) after being reflected on the reflecting means (4). The invention is characterised in that the reflecting means (4) is a mirror comprising a reflecting layer (11) capable of being ablated at least locally when it is subjected to high luminous intensity, and the second beam (F2) initiates the ablation process of the reflecting layer (11), which is continued and completed by the joint action of the two light beams (F1, F2).
(FR) La présente invention concerne un dispositif de protection d'un système optique (2) contre des surintensités lumineuses d'un faisceau lumineux incident (FO), comportant des moyens (3) pour former des premier et second faisceaux lumineux (F1, F2), et un moyen de réflexion (4), le premier faisceau (F1) étant guidé vers le système optique (2) après réflexion sur le moyen de réflexion (4). Selon l'invention, le moyen de réflexion (4) est un miroir comportant une couche réfléchissante (11) susceptible d'être ablatée au moins localement lorsqu'elle est soumise à une forte intensité lumineuse, et le second faisceau (F2) amorce l'ablation de la couche réfléchissante (11), qui est poursuivie et achevée par l'action conjuguée des deux faisceaux lumineux (F1, F2).
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Designated States: CA, CN, IL, JP, NO, RU, US
Publication Language: French (FR)
Filing Language: French (FR)
Also published as:
US6281487CA2274148