Spectral characteristic obtaining apparatus, image evaluation apparatus and image forming apparatus

摘要

A spectral characteristic obtaining apparatus including a light irradiation unit configured to emit light onto a reading object; a spectroscopic unit configured to separate at least a part of diffused reflected light from the light emitted onto the reading object by the light irradiation unit into a spectrum; and a light receiving unit configured to receive the diffused reflected light separated into the spectrum by the spectroscopic unit and to obtain a spectral characteristic. In at least one example embodiment, the light receiving unit is configured to be a spectroscopic sensor array including plural spectroscopic sensors arranged in a direction, and the spectroscopic sensors include a predetermined number of pixels arranged in the direction to receive lights with different spectral characteristics from each other.

主权项

1. A spectral characteristic obtaining apparatus comprising:
a spectroscopic imaging unit configured to separate reflected light from light emitted onto an object by a light irradiation unit into a plurality of diffracted lights with different spectral characteristics; and a light receiving unit including a plurality of pixels configured to simultaneously receive the plurality of diffracted lights, wherein, each of the plurality of pixels of the light receiving unit receives one of the plurality of diffracted lights without receiving other ones of the plurality of diffracted lights and without receiving non-diffraction light, and the spectroscopic imaging unit includes a diffraction unit configured to lead the plurality of diffracted lights to one or more of the plurality of pixels, the diffraction unit being positioned such that a diffraction direction has an angle with respect to an array direction of the plurality of pixels in a plane perpendicular to a light axis of the light receiving unit, the angle is based on a size of the plurality of pixels and a number of the plurality of pixels.