Optical measuring head
US4816670A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 18, 1987 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Sep 18, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/474
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical measuring head which includes a cylindrical portion having a circular cross section, a plurality of light projecting fibers axially disposed in the cylindrical portion through a predetermined distance, a light receiving fiber provided along an axis of the cylindrical portion, and a convex lens formed, at its outer peripheral portion, with a light receiving face for receiving the light from the light projecting fibers and directing the light through the lens so that the light will be incident upon a flat surface of the lens adjacent an object to be measured, through an angle smaller than a critical angle whereby the light will not be reflected by the flat surface, and disposed at a position coaxial with the light receiving fiber for focusing on a forward end face of the light receiving fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.