OPTICAL SCAN UNIT, IMAGE PROJECTOR INCLUDING THE SAME, HEAD-UP DISPLAY, AND MOBILE PHONE

摘要

PROBLEM TO BE SOLVED: To provide an optical scan unit which realizes a large scan angle using an optical deflector element with a small deflection angle, an image projector which can project large two-dimensional images in a very close range, and a vehicle head-up display using the image projector.

SOLUTION: An optical scan unit 10 is provided with a divergent light conversion element 12 having such positive power as to convert divergent light from the light source 11 into convergent light to form a spot S on a projection object (Sc), an optical deflector element 13 deflecting a light beam from the divergent light conversion element 12 to a first scan direction and a second scan direction which is orthogonal to the first scan direction, and a deflection angle conversion element 14 having such negative power as to convert a deflection angle of the light deflected by the optical deflector element 13.

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