Method and apparatus for indicating or measuring contact distribution over a surface
US3966326A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1975 |
| Grant date | Jun 29, 1976 |
| Priority date | — |
| Expiry date | Mar 17, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L1/241
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus are described for indicating or measuring contact pressure distribution over a surface, in which method and apparatus, a pressure-transmitting member having a plurality of point-contact projections is used to transmit the contact pressure, in the form of a plurality of localized points, to a photoelastic member. The photoelastic member is one whose optical properties are changed when the member is subjected to pressure, and the changes in optical properties are optically displayed by directing polarized light onto the photoelastic member to produce interference patterns at the localized points of contact pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.