Optical magnifying system

Details Optical magnifying system Optical magnifying system

1989-11-07

1991-01-29

Arnold, Bruce Y.

350410, G02B 934, G02B 912, G02B 520

Patent

active

049881752

ABSTRACT:
Optical systems with very long eye relief and large working distances (10) and (110) with four lenses (12), (14), (16), (18) and (20) and three lenses (112), (114) and (116), respectively, have lens surfaces shaped to focus upon an object such that a high resolution image is formed at infinity substantially over the entire field of view. High resolution and low distortion are substantially maintained independent of the user's eye location.

REFERENCES:
patent: 4768866 (1988-09-01), Wickholm et al.
patent: 4792214 (1988-12-01), Wickholm et al.

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