Spatially-resolved FWA spectrophotometer using micropatterned optical filters
AssigneeXerox Corporation
InventorsRobert P. Herloski, Paul S. Bonino, Jason M. LeFevre, David C. Craig
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Abstract
Provided is a system for providing spectral analysis with a spectrophotometer. The system includes an illuminator positioned adjacent to a carrier having a surface; a linear sensor positioned adjacent to the carrier; and a micropatterned optical filter is positioned between the linear sensor and the carrier. The illuminator is configured to emit light at a material disposed over the surface. The linear sensor is configured to receive the light from the illuminator.
Claims18
A system for providing spectral analysis with a spatially-resolved spectrophotometer, the system comprising:
- an illuminator positioned adjacent to a carrier having a surface, the illuminator being configured to emit light at a material disposed over the surface;
- a linear sensor positioned adjacent to the carrier, the linear sensor being configured to receive the light emitted from the illuminator and reflected off the material;
- a gradient index lens disposed between the carrier and the linear sensor, such that it is positioned in an optical path of the light emitted by the illuminator and reflected off the carrier's surface;
- and
- a micropatterned optical filter positioned between the linear sensor and the carrier,
- wherein the micropatterned optical filter is disposed directly on a light receiving portion of the linear sensor,
- wherein the micropatterned optical filter comprises a plurality of dichroic coatings stacked one over the other and disposed on a light receiving surface of the linear sensor, wherein each one of the plurality of dichroic coatings comprises a respective spectral transmittance, and
- wherein the system is devoid of a linear variable filter.
A method for providing spectral analysis with a spatially-resolved spectrophotometer, the method comprising:
- configuring an illuminator to emit a light beam at a material disposed over a surface of a carrier, the illuminator being positioned adjacent to the carrier;
- and
- configuring a linear sensor to receive the light emitted from the illuminator and at least partially transmitted through a gradient index lens and a micropatterned optical filter,
- wherein the gradient index lens is disposed in an optical path of the light reflecting off the carrier's surface and is disposed inbetween the carrier's surface and the micropatterned optical filter,
- wherein the linear sensor is positioned adjacent to the carrier's surface,
- wherein the micropatterned optical filter is disposed between the linear sensor and the carrier,
- wherein the micropatterned optical filter is disposed directly on a light receiving portion of the linear sensor,
- wherein the micropatterned optical filter comprises a plurality of dichroic coatings stacked one over the other and disposed on a light receiving surface of the linear sensor, wherein each one of the plurality of dichroic coatings comprises a respective spectral transmittance, and
- wherein the light emitted by the illuminator and received by the sensor is not transmitted through a linear variable filter.
Dependencies are inferred from the claim text.