Optical projection device and projector that corrects the inclination of the movable lens frame with respect to the optical axis
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United States of America Patent
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Jan 15, 2019
Grant Date -
Jan 18, 2018
app pub date -
Jan 8, 2016
filing date -
Jan 27, 2015
priority date (Note) -
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Abstract
A optical projection device that projects an image with excellent image quality while achieving miniaturization is provided. The optical projection device includes a first lens frame holding a first lens group L1 and including a cam pin, a guide barrel including a straight movement groove, a cam barrel including a cam groove, and an urging portion that urges the first lens frame in a direction intersecting with the direction along an optical axis. The cam pin is formed at a position spaced apart from a center of gravity including the first lens frame and members attached to the first lens frame in the direction along the optical axis Ax and the urging portion urges the first lens frame at a position closer than the cam pin with respect to the center of gravity in the direction along the optical axis.
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