| 摘要 |
PURPOSE:To distribute and transmit light information to many optical output elements at the substantially same time by providing an optical input element equipped with light emitting elements in plural wavelengths and plural reflection type filters which have wavelength selectivity to make light having a specific wavelength reflected and other lights transmitted. CONSTITUTION:An input signal surface Is is a display where a two-dimensional image is displayed and output surfaces Os1 and Os2 are two-dimensional arrays of photodetectors such as photodiodes. A deflecting element for distributing signals to plural output surfaces Os1, Os2... Osn consists of >= 2 reflection type filters F1, F2... Fn which have the wavelength selectivity so that their reflection factors are maximum to mutually different wavelengths lambda1, lambda2... lambdan. The filters having the wavelength selectivity can select signal outputs S1, S2... Sn on some or all of the output surfaces Os1, Os2... Osn with the wavelength of a light source at the same time. Volume type phase holograms, dielectric multi-layered films, etc., are usable as the reflection type filters having the wavelength selectivity. |
