Irradiation optical system and projector
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United States of America Patent
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Oct 29, 2019
Grant Date -
Jan 11, 2018
app pub date -
Dec 8, 2015
filing date -
Feb 5, 2015
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Abstract
An irradiation optical system includes a uniformizing section and an irradiation lens section. The uniformizing section brings in-plane distribution of light emitted from a light source, close to uniform in-plane distribution. The irradiation lens section diffuses the light in a predetermined direction. The in-plane distribution of the light is brought close to the uniform in-plane distribution by the uniformizing section. The irradiation lens section includes, in order from the light source, a first cylindrical lens and a second cylindrical lens each having negative refractive power in the predetermined direction.
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