Space navigation optical instrument and contaminant removing...

Details Space navigation optical instrument and contaminant removing... Space navigation optical instrument and contaminant removing...

2006-04-04

2006-04-04

Dunn, Drew A. (Department: 2872)

Optical: systems and elements

Protection from moisture or foreign particle

C359S896000, C359S820000, C244S164000

Reexamination Certificate

active

07021776

ABSTRACT:
In a space navigation optical instrument comprising a barrel for housing therein an optical part and a contaminant removing door, provided at a part of the outer periphery of the barrel which has the largest radiant heat coupled to the space during a space navigation and has the least external heat input, for opening the inside of the barrel to the space, a thermal gradient is generated in which the inside of the barrel is of a high temperature and the space is of a low temperature, and the inside of the barrel is opened to the space by opening the contaminant removing door to discharge contaminants into the space.

REFERENCES:
patent: 5191469 (1993-03-01), Margolis
patent: 5296285 (1994-03-01), Babel et al.
patent: 5696429 (1997-12-01), Williamson et al.
patent: 5716030 (1998-02-01), LaFiandra et al.
patent: 2-140517 (1990-11-01), None
patent: 3-67312 (1991-07-01), None
patent: 2688322 (1997-08-01), None

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