Projection lens and projection apparatus
Number of patents in Portfolio can not be more than 2000
United States of America
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Dec 10, 2024
Grant Date -
Aug 25, 2022
app pub date -
May 2, 2022
filing date -
May 2, 2022
priority date (Note) -
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Abstract
A projection lens having an optical system includes: an incidence lens on which light from an electrooptic element is incident; and an emission lens positioned closest to a magnification side and emits an image toward a projection surface, in which an incidence optical axis of the incidence lens is shifted in a first direction orthogonal to the incidence optical axis with respect to a center of a screen of the electrooptic element, a projection angle, which is an angle of an emission optical axis of the emission lens with respect to the projection surface, is less than 90°, and assuming an effective diameter of the emission lens is DE, a focal length of an entire optical system including the emission lens is f, and a half angle of view of the entire optical system is ω, ω is ≥60°, and a value of PA defined by Expression (1)≥0.1 and ≥7. PA=DE/(f×tan ω) (1).
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