Illumination system to produce self-luminous light beam of selec

Details Illumination system to produce self-luminous light beam of selec Illumination system to produce self-luminous light beam of selec

1988-08-29

1991-10-22

Arnold, Bruce Y.

Optical: systems and elements

Extended spacing structure for optical elements

359894, 359900, 385146, 385147, G02B 700, G02B 600

Patent

active

050590138

ABSTRACT:
This illumination system produces a light beam of selected cross-section shape and uniform intensity, which emits self-luminously into a selected numerical aperture, by: providing a non-uniform, non-self-luminous laser light beam; configuring the beam to eliminate the non-uniformities near the beam periphery; providing the semi-uniform light beam to a light gate; providing also a lamp light beam with optics and infra-red trap; gating selectively the laser light beam or the lamp light beam to a light beam characterization subsystem; configuring the selected semi-shaped semi-uniform non-self-luminous light beam to provide a selected shaped semi-uniform non-self-luminous light beam; focusing the selected shaped semi-uniform non-self-luminous light beam, with a focal length related to the selected numerical aperture, onto the input plane of a total-internally-reflective beam-shaper-uniformizer, causing multiple reflections within the uniformizer and overlapping of different parts of the beam with one another, the length of the beam-shaper-uniformizer being related to the selected intensity uniformity, resulting in a selected shaped uniform semi-self-luminous light beam at the exit plane; diffusing the light beam; passing the selected shaped uniform self-luminous light beam through a collection lens to convey the beam with the selected numerical aperture toward an application subsystem.

REFERENCES:
patent: 3370502 (1968-02-01), Wilks
patent: 3600568 (1971-08-01), Weyrauch

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