Title:
【発明の名称】複式分光計色センサ
Document Type and Number:
Japanese Patent JP3228479
Kind Code:
B2
Abstract:
Disclosed is an apparatus for measuring on-line the color and color-related properties of a moving sheet. Contrast ratio reflectance measurements are made for providing opacity corrections substantially in real time for a full color spectrum. An optical color sensor in accordance with the invention includes a pair of synchronized spectrometers, the first spectrometer being aligned to view a region of the sheet backed with a highly reflective ("white") material and the second spectrometer being aligned to view a region of the sheet backed with a highly absorptive ("black") material. The use of two spectrometers permits substantially simultaneous "black" and "white" measurements for a full color spectrum. The optical color sensing system further includes two light sources, a flashlamp and a continuously energized tungsten filament lamp. The color sensor further includes a sheet backing system including a rotatable standard wheel carrying a white standard tile. Provision is made to permit rotation of the standard wheel and to standardize the sensor off-sheet while maintaining isolation of the white standard tile from the paper mill environment. The sheet backing system includes a paper guide plate defining an annular vortex space into which air is introduced from a pressurized source. A low pressure region thereby produced in the vortex space draws the paper sheet toward the guide plate. At the same time, circulating air spirals outwardly from the vortex space to form a thin air film or air bearing between the sheet and the paper guide.
More Like This:
Inventors:
Gordon Daniel A
Argard Mark Jay
Argard Mark Jay
Application Number:
JP50321297A
Publication Date:
November 12, 2001
Filing Date:
June 10, 1996
Export Citation:
Assignee:
Honeywell Majorex Corporation
International Classes:
G01N21/25; G01N21/86; G01N21/89; G01J3/50; G01N21/892; (IPC1-7): G01N21/89; G01J3/50
Other References:
【文献】米国特許5047652(US,A)
【文献】米国特許4699510(US,A)
【文献】米国特許4659193(US,A)
【文献】米国特許4449821(US,A)
【文献】米国特許4699510(US,A)
【文献】米国特許4659193(US,A)
【文献】米国特許4449821(US,A)
Attorney, Agent or Firm:
Kenji Yoshida (2 outside)