| abstract |
Optical sensor system (100) for a hardcopy device (20) with: a housing (102) defining an output light path (128) and an input light path (112, 114); a plurality of light emitting elements (120, 122, 124, 126) sharing the output light path for irradiating an object (169) within the hardcopy device; and a sensor (108, 110) which receives light reflected from the irradiated object via the input light path; characterized in that the plurality of light-emitting elements comprise at least four elements each emitting different colors, the different colors comprising blue light, green light, red light and orange light. |