Colorimeter with high SNR
AssigneeGretagMacbeth, LLC
InventorsCarl David Lutz, Thomas A. Lianza
Life of this patent
Estimating the term…
Abstract
A colorimeter device and fabrication techniques are disclosed. The assembly and configuration of the device operates to maximize signal-to-noise ratio, as well as to provide an optimal field of view (e.g., such as an FOV that simulates that of the human eye). Geometric elements and features of the design, in conjunction with the assembly procedure, assure precise alignment of optical elements including sensors, filters, and other elements within the enclosure and optical path.
Claims19
A color sensing device for sensing light emitting from a target surface, the device comprising:
- three or more light sensors, each sensor configured with a bubble shaped lens and adapted to detect light from the target surface;
- a sensor locating element having three or more light passages and corresponding alignment holes, each hole adapted to receive a corresponding one of the bubble shaped lenses, thereby aligning each sensor with a corresponding light passage;
- a tube block operatively coupled in alignment with the sensor locating element, the tube block having three or more filter cavities and corresponding light passages, each light passage in alignment with a corresponding light passage of the sensor locating element;
- and
- three or more distinct light filter stacks including one or more filter elements, each filter stack placed in a corresponding one of the filter cavities, thereby providing three or more overlapping spectrally selective channels, with each spectrally selective channel designed to provide a pre-defined field of view between the target surface and a corresponding one of the light sensors.
A color sensing device for sensing light emitting from a target surface, the device comprising:
- a tube block having one or more filter cavities and corresponding light passages, and two or more alignment pins, thereby enabling a self-aligning fabrication process for the device;
- one or more light sensors, each sensor configured with a bubble shaped lens and adapted to detect light from the target surface;
- and
- a sensor locating element operatively coupled to the pins of the tube block, the sensor locating element having one or more lens alignment holes, each hole adapted to receive a corresponding one of the bubble shaped lenses, thereby aligning each sensor with a corresponding light passage of the tube block.
Dependencies are inferred from the claim text.