Projection device

Details Projection device Projection device

2007-08-21

2007-08-21

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

With field curvature shaping

C359S650000, C359S651000, C359S362000, C353S071000, C353S098000

Reexamination Certificate

active

11484901

ABSTRACT:
A projection device includes an image source unit, a first projecting optical system, an intermediate optical system, and a second projecting optical system. The image displaying area of the image source unit is tilted with respect to a first virtual plane, and an intermediate image is tilted with respect at least the first virtual plane. A following relationship is satisfied:-1>tan⁢⁢θ2tan⁢⁢θ1>f⁢⁢1H2⁢sin⁢⁢θ1where, f1denotes a focal length of the first projecting optical system, θ1denotes a tilt angle of the image display surface of the image source unit with respect to the first virtual plane, H represents a length of the image source unit which corresponds to the image projected on the screen in the vertical direction, and θ2denotes a tilt angle of the intermediate image with respect to the first imaginary surface.

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