Illumination optical apparatus

Details Illumination optical apparatus Illumination optical apparatus

1994-11-04

1998-02-03

Lazarus, Ira S.

Illumination

Light source and modifier

Plural serial lens elements or components

362331, 353 38, 355 67, 355 53, F21V 504

Patent

active

057136602

ABSTRACT:
An illumination optical apparatus according to the present invention comprises a light source, a collector mirror having an ellipsoidal surface of revolution for reflecting and collecting light from the light source, a collimator lens for converting the light collected by the collector mirror into nearly parallel beams, an optical integrator for producing a plurality of light source images from the beams outgoing from the collimator lens, and a condenser lens for condensing light from the plurality of light source images to illuminate a body to be illuminated in a superimposed manner. Wherein the collimator lens is arranged to satisfy the following condition, R.sub.max <f.sub.col .multidot.sin u.sub.max ; where f.sub.col is a focal length of the condenser lens, u.sub.max a maximum angle of incidence of the light incident into the collimator lens, and R.sub.max a maximum beam radius of the nearly parallel beams collimated by the collimator lens.

REFERENCES:
patent: 3296923 (1967-01-01), Miles et al.
patent: 3941475 (1976-03-01), Sheets
patent: 4497015 (1985-01-01), Konno et al.
patent: 4717242 (1988-01-01), Echizen et al.
patent: 5005959 (1991-04-01), Nagata et al.
patent: 5046838 (1991-09-01), Iwasaki
patent: 5418583 (1995-05-01), Masumoto

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