Wide-angle objective

Details Wide-angle objective Wide-angle objective

1990-02-13

1991-10-15

Arnold, Bruce Y.

Optical: systems and elements

Lens

With diverse refracting element

359754, G02B 1134

Patent

active

050569015

ABSTRACT:
A wide-angle objective for a picture-taking lens of an aerial mapping camera, consisting of 11 lenses and 14 glass-air surfaces, the first optical element of which after the center aperture on the picture side is a converging fluorspar or fluorspar-like lens. Due to the large refractive index difference between this lens and the following meniscus lens and due to the provision of a triple group of high refractive index on the object side before the center aperture, a high resolution, low residual distortion and minimal lateral chromatic aberration are achieved.

REFERENCES:
patent: 4013349 (1977-03-01), Bertele
patent: 4386163 (1983-05-01), Kodama

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