Apparatus and process for measuring an optical characteristic of a predetermined portion of a flat object
US4900148A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 9, 1985 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | Dec 9, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/5911
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for measuring an optical characteristic, such as color, of an object having two edges comprises a support for the object, a stop member slideable but releasably secureable to the support in a variety of different positions allowing for variation of the position of the stop member in two dimensions, and an optical instrument for measuring the desired optical characteristic. In use, the two edges of the object to be tested are abutted against two stop surfaces on the stop member and the optical instrument lowered adjacent the object to determine the optical characteristic of a portion of the object beneath the instrument. A number of similar objects can be tested by abutting them in turn against the stop surfaces of the stop member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.