| 摘要 |
PURPOSE:To maximize the transfer efficiency of light in a 'Selfoc(R)' lens array group by processing all light beams that reach the second 'Selfoc(R)' lens array group from the first 'Selfoc(R)' lens array group, as parallel rays. CONSTITUTION:A reflected light from some part (a) of an original D which has been irradiated by an original illuminating light beam 2 is transferred to a prescribed image forming part of photosensitive bodies Sa-Sc, respectively, through the first 'Sefloc(R)' lens array 3, a spectral means 4, and the second 'Selfoc(R)' lens array group 5. Light emitting parts 7a-7c of each 'Selfoc(R)' lens array 3A-3C are arranged in parallel at a suitable interval. In a position opposed to the light emitting part 7b, a parallel plate glass 4 is placed, and the parallel plate glass 4 consists of a material having a large refractive index, such as a compressed glass, etc., and a light beam passes through a path conforming with a wavelength and brought to spectrum. In this way, since the fixed parallel plate glass 4 is used as a spectral means, the light beam radiated from this parallel plate glass becomes parallel to an incident light beam, and the optical transfer efficiency in the second 'Selfoc(R)' lens array 5 becomes maximum.
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