Reflectance measuring device
US5982501A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 1998 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | May 11, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/0272
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measuring device, designed as a hand-held device, is disclosed, having a housing, an optical measuring head movably arranged in the housing for charging a test object with measuring light and for collecting light reflected by the test object, an opto-electric converter for converting the collected light into electrical signals, a computer processing the electrical signals and controlling the device, a display for displaying the measurement values obtained from the processing of the electrical signals and operating members working with the computer for controlling the device functions. Upon a triggering of the measuring process, the measuring head is moved, by a motor controller by a computer, out of a rest position into a measuring position and back into the rest position. A calibrating position is provided, in the housing, into which the measuring head can be moved and in which a calibration test object is disposed. The computer measures the calibration test object and generates calibration measurement values. Reference values corresponding to the calibration measurement values are stored in the computer. The computer performs calibration of the device by using calibration measu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.