Patent
1988-11-17
1990-01-09
Dzierzynski, P. M.
350449, 350432, G02B 914
Patent
active
048923982
ABSTRACT:
In a triplet type objective for a compact lens shutter camera with a diaphragm arranged behind the lens system, the first and the second lens elements are formed of plastic and the third lens element is formed of glass, so that it is advantageous in manufacturing cost and weight. Therefore, an F No. of the objective is small and aberrations, for example astigmatic difference, are corrected well.
REFERENCES:
patent: 3784287 (1974-01-01), Grey
patent: 4105308 (1978-08-01), Owen, Jr. et al.
patent: 4542961 (1985-09-01), Sato
Date Mitsuko
Fukushima Akira
Kimura Kazuo
Kudo Yoshinobu
Dzierzynski P. M.
Minolta Camera Kabushiki Kaisha
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