Dielectric layer polarizer
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United States of America Patent
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-
Oct 30, 1990
Grant Date -
N/A
app pub date -
Apr 4, 1989
filing date -
Apr 8, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates in particular to polarizing light whose angle of incidence may vary substantially, e.g. over .+-.10.degree.. A polarizing stack (22) constituted by dielectric layers (30, 31, 32, 33, 34, . . . ) is formed on an oblique face (4). It is in the form of a repetitive sucession of symmetrical sequences (30, 31, 40) each constituted by two half-thickness low refractive index layers (30, 40) on either side of a high refracture index layer (31). The invention is particularly applicable to polarizing the light emitted by a semiconductor laser.
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