Surface illuminator

Details Surface illuminator Surface illuminator

1993-06-16

1994-12-27

Cole, Richard R.

Illumination

Revolving

362326, 362327, F21V 800

Patent

active

053770838

ABSTRACT:
A surface illuminator provided with a light guide plate having circular end faces which surround light sources, the light guide plate being long in a direction in which the light sources are high in luminance and having a back which is inclined so as to be smaller in plate thickness gradually as the distance from the light sources becomes longer, and also provided with a reflection frame, the reflection frame having end-face reflective portions which cover the portions of the light guide plate near the light sources and also having inclined reflective portions which are contiguous to the end-face reflective portions and which are inclined approximately 45.degree. in longitudinal and thickness directions of the light guide plate at positions spaced apart from the light sources. By this construction, the intensity of radiation light is rendered uniform throughout the whole radiation surface.

REFERENCES:
patent: 4933814 (1990-06-01), Sanai
patent: 4975808 (1990-12-01), Bond et al.
patent: 5029045 (1991-07-01), Sanai et al.
patent: 5050046 (1991-09-01), Tada
patent: 5101325 (1992-03-01), Davenport et al.
patent: 5136483 (1992-08-01), Schoniger et al.
patent: 5150960 (1992-09-01), Redick

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