Varifocal objective containing movable lens component of positiv

Details Varifocal objective containing movable lens component of positiv Varifocal objective containing movable lens component of positiv

1975-06-09

1977-04-19

Corbin, John K.

G02B 1514

Patent

active

040185109

ABSTRACT:
An objective of variable focal length affording an aperture ratio of about 1:1.0 to 1:1.4 for narrow film projectors and microscopes comprising at least six lens members separated by air spaces, characterized by the following construction and arrangement of the lens members:

REFERENCES:
patent: 3580662 (1971-05-01), Scholz
patent: 3597048 (1971-08-01), Bertele

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