Lens system having a good image performance for white light

Details Lens system having a good image performance for white light Lens system having a good image performance for white light

1986-08-26

1989-03-07

Corbin, John K.

350427, G02B 300, G02B 1514

Patent

active

048100706

ABSTRACT:
A lens system has a lens unit comprising a positive lens and a negative lens. The positive lens has an index distribution in the direction of the optic axis. The value of the index gradient for a light having a short wavelength in the vicinity of the vertex of at least one convex surface of the positive lens is smaller than the value of the index gradient for a light having a long wavelength.

REFERENCES:
patent: 3718383 (1973-02-01), Moore
patent: 3729253 (1973-04-01), Moore
patent: 4099850 (1978-07-01), Matsui
patent: 4571032 (1986-02-01), Someya et al.
Introduction to Classical and Modern Optics (2nd Edition), Prentice-Hall, Inc., Jurgen R. Meyer-Arendt, M.D., pp. 362-365, Copyright 1972, 1984.
Applied Optics, vol. 23, No. 11, pp. 1735-1741, Gradient-Index Wide-Angle Photographic Objective Design, Atkinson III, et al., Jun. 1984.

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