High efficiency linear light source

Details High efficiency linear light source High efficiency linear light source

1992-05-21

1994-08-02

Husar, Stephen F.

Illumination

Light source and modifier

Including reflector

362302, 362346, 362 32, F21V 700

Patent

active

053351584

ABSTRACT:
A linear light source for a film scanner is disclosed which includes an elongated light integrating cavity, formed within a solid illumination body, having diffusely reflective walls. Light is introduced into the cavity through an input port, and an output beam of diffuse light is produced through a slot which is generally parallel to the longitudinal axis of the integrating cavity. In order to increase the efficiency of the light source, light is introduced into the cavity through a high collection non-imaging optical device formed as a hollow bore within the illumination body.

REFERENCES:
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patent: 4797711 (1989-01-01), Sasada et al.
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patent: 4868383 (1989-09-01), Kurtz et al.
patent: 5103385 (1992-04-01), Federico et al.
patent: 5215370 (1993-06-01), Kaplan
"High Collection Nonimaging Optics", W. T. Welford & R. Winston, Harcourt Brace Jovanovich, 1989, pp. 1-7, 53-63, 72-81, 84-87.

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