Cover lens for light

Details Cover lens for light Cover lens for light

1989-02-27

1990-03-27

Lazarus, Ira S.

Illumination

Light modifier

Refractor

362309, 350167, F21V 504

Patent

active

049126130

ABSTRACT:
A cover lens element for a surgical light includes a clear plastic light path region which may be smooth and flat on one surface but which is dimpled on its other surface with numerous overlapping spherical depressions which in combination present an array of plano-concave negative lenses.

REFERENCES:
patent: 1243652 (1917-10-01), Casey
patent: 1249408 (1917-12-01), Johanson
patent: 2482287 (1949-09-01), Packer et al.
patent: 3005087 (1961-10-01), Klein
patent: 3588488 (1971-06-01), Lauterbach
patent: 3763369 (1973-10-01), Lewin
patent: 3887801 (1975-06-01), Ilzig et al.
patent: 4196460 (1980-04-01), Schreckendgust
patent: 4380794 (1983-04-01), Lawson
patent: 4703405 (1987-10-01), Lewin

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