| 摘要 |
PROBLEM TO BE SOLVED: To provide a projector which enables even an image on the surface of a uncorroded metal sample focused on a screen to be clearly photographed with a digital camera. SOLUTION: In the projector provided with a sample base for placing the metal sample, a lens for projecting the light from a light source to the surface of the sample to enlarge the reflected light, and the screen for focusing the reflected light, the screen is formed in a three-layer structure of a ground glass, a transparent glass and a Fresnel lens. COPYRIGHT: (C)2003,JPO
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