Compact photographic objective of the triplet type having improv

Details Compact photographic objective of the triplet type having improv Compact photographic objective of the triplet type having improv

1992-10-13

1994-06-14

Ben, Loha

Optical: systems and elements

Lens

Multiple component lenses

359785, G02B 914

Patent

active

053215559

ABSTRACT:
An objective for use in photographic compact cameras has a relative aperture of 3.5 and a focal length of 35 mm, and is of the triplet type. The lens element on the object side is a cemented element. In order to achieve an extremely compact structural shape and balanced monochromatic correction, as well as a reduction in the chromatic magnification difference, the color coma and the color astigmatism, four design conditions are specified.

REFERENCES:
patent: 2728266 (1955-12-01), Tolle
patent: 5161065 (1992-11-01), Ohshita

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