1985-06-19
1987-08-25
Corbin, John K.
G02B 934, G02B 1318
Patent
active
046889035
ABSTRACT:
This invention relates to a wide angle lens for a compact camera using a lens shutter, in which wide angle lens, a distance from a front surface of the lens to a film surface is short. The lens is a lens of the inverted retrofocus type in which a negative meniscus lens greatly curved toward an image is arranged at the rear of a triplet lens of convex, concave and convex. The second, third and fourth lenses each comprise a plastic lens. Various aberrations are compensated and variation in focal length due to a variation in temperature is also prevented. By the formation of plastic lenses, it is possible to easily form the fourth lens into an aspherical lens.
Fujita Hisao
Wakabayashi Tomoko
Yamazaki Hiroyuki
Bierman Jordan B.
Corbin John K.
Gass Rebecca D.
Konishiroku Photo Industry Co,., Ltd.
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