| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an adaptor for lighting where the size of a diffusion plate is made appropriate. <P>SOLUTION: The adaptor for lighting is inserted between a light source and an object to be illuminated for use, has the diffusion plate 1 and an aperture diaphragm 2, and satisfies the conditions of a formula when the radius, thickness, and attenuation coefficient of the diffusion plate 1 are set to A, h, and α, respectively, and the radius of the aperture diaphragm is set to B. <P>COPYRIGHT: (C)2009,JPO&INPIT |
