High image contrast reflecting telescope

Details High image contrast reflecting telescope High image contrast reflecting telescope

1987-09-14

1988-11-08

Punter, William H.

350172, 350505, G02B 1708, G02B 2306, G02B 2714

Patent

active

047831588

ABSTRACT:
A telescope assembly (10,10',10") including a primary mirror (12,12',12") and a secondary mirror (22,22',22") for receiving the primary light beam (50,50',50") reflected from the front side (14,14',14") of the primary mirror (12,12',12") and reflecting the primary light beam (50,50',50") to an eyepiece (28,28',28"). The secondary mirror (22,22',22") is disposed on the optical axis (18,18',18") defined by the primary mirror (12,12',12") and obstructs a portion of the primary light beam (50,50',50") received by the primary mirror (12,12',12"). An intercept mirror assembly intercepts the obstructed portion of the primary light beam (50,50',50") ahead of the rear side (26,26',26") of the secondary mirror (22,22',22") and merges the intercepted light beam into the primary light beam between the front faces (14,14',14",24,24',24") of the primary and secondary mirrors (12,12',12",22,22',22" ) to form an unobstructed view of the on-axis object.

REFERENCES:
patent: 4664515 (1987-05-01), Imura et al.

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