The present invention is directed to the provision of a reflecting mirror that suppresses decreases in the resolution performance and contrast performance by decreasing the mean surface roughness. In a projection type image display apparatus including a projector lens that expansion projects the image...http://www.google.com.tw/patents/US7316482?utm_source=gb-gplus-share專利 US7316482 - Reflecting mirror and projection image display apparatus using the same
