Optical system with variable pointing and method...

Details Optical system with variable pointing and method... Optical system with variable pointing and method...

2008-06-10

2008-06-10

Allen, Stephone B. (Department: 2872)

Optical: systems and elements

Compound lens system

Telescope

C359S399000, C250S203100, C250S203600

Reexamination Certificate

active

07385759

ABSTRACT:
An optical system including a telescope and a principal pointing device for selecting a direction of observation is disclosed. The system furthermore includes at least one secondary pointing device arranged ahead of a part of the entrance of the telescope and oriented fixedly with respect to the principal pointing device. A set of photodetectors records a secondary image formed by the telescope from light rays directed by the secondary pointing device toward the entrance of the telescope The secondary image makes it possible to accurately determine the direction of observation.

REFERENCES:
patent: 2923202 (1960-02-01), Trimble
patent: 4159419 (1979-06-01), Wittke
patent: 5108168 (1992-04-01), Norbert et al.
patent: 5773813 (1998-06-01), Duchon et al.
patent: 5828447 (1998-10-01), Duchon et al.
patent: 2005/0036198 (2005-02-01), Safa
patent: 2 344 951 (2000-06-01), None
French International Search Report FR 0410602; report dated May 12, 2005.

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