Optical: systems and elements – Lens – With diverse refracting element
Patent
1994-07-26
1997-02-11
Epps, Georgia Y.
Optical: systems and elements
Lens
With diverse refracting element
359672, G02B 300
Patent
active
056026820
ABSTRACT:
An aberration correcting plate for a compatible interchangeable lens which can be detachably attached to a first camera body having a large resultant thickness of filters provided in front of an image pickup device and to a second camera body having a small resultant thickness of filters provided in front of an image pickup device is mounted to a rear end of the compatible interchangeable lens when the rear end is mounted to the second camera body. The aberration correcting plate is made of a parallel-plate whose refractive index N is greater than 1.7 or a lens of negative power. The sum of the thicknesses of the aberration correcting plate and the filters provided in front of the image pickup device of the second camera body is substantially identical to or smaller than the total thickness of the filters provided in front of the image pickup device of the first camera body.
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Ito Takayuki
Machii Hideto
Shishido Takayasu
Asahi Kogaku Kogyo Kabushiki Kaisha
Asahi Seimitsu Kabushiki Kaisha
Epps Georgia Y.
Schwartz Jordan M.
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