| 摘要 |
PROBLEM TO BE SOLVED: To provide a screen capable of limiting entering of an unwanted light such as an outdoor daylight without generation of luminance unevenness or luminance decline even in the case the incident angle of a projected light is large. SOLUTION: A reflection system is formed with a pair of cylindrical lenses 15 and a common linear mirror 16. Since a projected light L1 incident on the lower cylindrical lens 15 is reflected by the linear mirror 16 so as to be emitted as a reflected light L2 from the upper cylindrical lens 15, a large angle differenceαis provided between the direction of the light incident on the linear mirror 16, that is, the projected light L1 and the direction of the light emitted from the linear mirror 16, that is, the reflected light L2 smoothly. Thereby, projection is performed with a large incident angle from a short distance by shortening the projection distance from a projector 20 to a screen 10. COPYRIGHT: (C)2009,JPO&INPIT
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