| 摘要 |
A photo film scanner for photo film having an image frame has plural light sources, which apply illuminating light to the photo film, and include a multi-chip LED packages having plural chips for emitting the illuminating light at wavelengths different from one another. Plural photo receptors receive light from the photo film upon incidence of the illuminating light thereon, so as to retrieve frame position information and frame size information of the image frame. A wavelength control unit is responsive to setting of one detecting mode included in plural detecting modes, and drives a related chip within each multi-chip LED package related to a predetermined wavelength, for example one for an orange or white color. Emission of an unrelated chip within the multi-chip LED package unrelated to the predetermined wavelength is suppressed, to restrict the illuminating light to the predetermined wavelength for the one detecting mode.
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