Projecting device
AssigneesTohoku University, Hoya Corporation
InventorsTatsuo Uchida, Tetsuya Abe, Ken Agatsuma
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Abstract
A rear-projection type projecting device enlarging and projecting an image displayed by a display device onto a screen, including a projecting optical system including a first optical system having a positive power and a second optical system having a reflection surface with a positive power, and a plane mirror attached to the projecting device to form a substantially right angle with respect to the screen and to reflect light emerging from the projecting optical system to the screen, wherein an effective reflection area of the reflection surface with the positive power is located at a position farther from an optical axis of the first optical system when viewed from the plane mirror.
Claims7
A rear-projection type projecting device enlarging and projecting an image displayed by a display device onto a screen, comprising:
- a projecting optical system including a first optical system having a positive power and a second optical system having a reflection surface with a positive power;
- and
- a plane mirror attached to the projecting device to form a substantially right angle with respect to the screen and to reflect light emerging from the projecting optical system to the screen,
- wherein an effective reflection area of the reflection surface with the positive power is located at a position farther than a position of an optical axis of the first optical system when viewed from the plane mirror.
Dependencies are inferred from the claim text.