Patent
1987-07-06
1988-08-23
Corbin, John K.
350169, G02B 2714
Patent
active
047657154
ABSTRACT:
In a beam splitter for splitting a single input light beam into a plurality of outgoing light beams, a transparent block has first and second planar surfaces substantially parallel to each other. Antireflection and reflection layers are laid on incident and reflection areas defined on the first planar surface while a plurality of partial semitransparent layers are attached to an outgoing area defined on the second planar surface. The incident light beam enters through the antireflection layer into the block and exits as the outgoing light beams through the partial semitransparent layers. At least one of the partial semitransparent layers has a width wide enough to at least two of the outgoing light beams. The partial semitransparent layers may be deposited on the first planar surface in the vicinity of the antireflection layer. In this event, the reflection layer is deposited on the second planar surface.
REFERENCES:
patent: 3485552 (1969-12-01), Adler
patent: 3498693 (1970-03-01), Fein et al.
patent: 4125864 (1978-11-01), Aughton
patent: 4362361 (1982-12-01), Campbell et al.
Inoue Teiji
Matsudaira Takeo
Corbin John K.
Dzierzynski Paul
Hoya Corporation
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