Aspherical single lens

Details Aspherical single lens Aspherical single lens

1987-10-16

1989-05-09

Corbin, John K.

G02B 302, G02B 1318

Patent

active

048283738

ABSTRACT:
An aspherical single lens of compact construction and good image-forming performance which is obtained by shaping the first surface into such an aspherical configuration the curvature radius of which increases gradually toward the periphery from the center while satisfying the following conditions:

REFERENCES:
patent: 4415238 (1983-11-01), Braat et al.
patent: 4449792 (1984-05-01), Arai
patent: 4657352 (1987-04-01), Suda, et al.
patent: 4765725 (1988-08-01), Suda

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