Optical viewing system

Details Optical viewing system Optical viewing system

1984-04-02

1985-10-08

Henry, Jon W.

350537, 350432, 350469, 350447, 354225, G02B 2308, G02B 2314, G02B 934, G03B 1302

Patent

active

045456550

ABSTRACT:
An elongated optical system for use as a camera viewfinder. The system comprises four lens groups and four mirrors arranged around the second group to fold the system optical axis and provide for proper image orientation. Group power distribution is of form negative, positive, positive, and then positive with the first and second group structured to form an intermediate real image which is then viewable via the third and fourth groups. The viewfinder overall, however, is substantially afocal.

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