Plastic lens

Details Plastic lens Plastic lens

1994-06-22

1995-04-18

Sugarman, Scott J.

Optical: systems and elements

Lens

342258, 359196, 526282, G02B 104, G01D 942, C08F 1000

Patent

active

054083605

ABSTRACT:
A plastic lens used for an optical system using a laser light source is made of a plastic material having a modulus of photoelasticity at a wavelength of 632.8 nm of larger than zero but no larger than 60.times.10.sup.-13 cm.sup.2 /dyne. The plastic lens satisfies a condition that a product W.times.D/H is larger than zero but no larger than 4, where D is a maximum thickness of the plastic lens along an optical axis in a light beam effective diameter, H is a lens outer diameter and W (%) is a saturation moisture absorption factor as a temperature of 50.degree. C. and a humidity of 95%.

REFERENCES:
patent: 4432022 (1984-02-01), Tokumitsu
patent: 4512632 (1985-04-01), Tokumitsu et al.
patent: 4523801 (1985-06-01), Baba et al.
patent: 4874808 (1989-10-01), Minami et al.
patent: 4957990 (1990-09-01), Sudo et al.

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