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US 8,964,176 B2Granted
Spectrometer, and image evaluating unit and image forming device incorporating the same
AssigneeRicoh Company, Ltd.
InventorsNaohiro Kamijo, Kohei Shimbo, Yoichi Kubota, Manabu Seo
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Abstract
A spectrometer includes a light source to project a light beam to a target object, an optical element including a plurality of apertures through which the light beam reflected by the target object transmits, a diffraction element to form diffracted images from a plurality of light beams having transmitted through the optical element, and a light receiving element to receive the diffracted images formed by the diffraction element and including an optical shield to block a diffracted image other than a certain-order diffracted image.
Claims10
A spectrometer comprising:
- a light source to project a light beam to a target object;
- an optical element with a plurality of apertures through which the light beam reflected by the target object transmits;
- a diffraction element to form diffracted images from a plurality of light beams having transmitted through the optical element;
- and
- a light receiving element to receive the diffracted images formed by the diffraction element and including an optical shield to block a diffracted image other than a certain-order diffracted image.
2 more elements
Dependencies are inferred from the claim text.