Patent · US Active

Optical displacement sensor element

US10190870B2 · kind B2 · utility

1Cited by

11References

22Claims

0Family size

Assignee

SINTEFF TTO AS · NO

Inventors

Matthieu Lacolle · Nordnesøy, NO
Ib-Rune Johansen · Oslo, NO
Thor Bakke · Dresden, DE
Ole-Herman Bjor · Heggedal, NO

Key dates

Filing date	Jun 20, 2014
Grant date	Jan 29, 2019
Priority date	—
Expiry date	Jun 20, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH04R23/008
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The present invention relates to an optical displacement sensor comprising a first at least partially reflective surface and a second surface having a diffractive pattern, the surfaces being provided on elements having a variable distance between them, each surface pair defining a cavity between them. The sensor also comprising at least one light source transmitting light at least one a chosen wavelength range into said cavities and at least one light detector receiving light from the cavities, wherein said diffractive patterns are adapted to direct light toward at least one detector provided in a known position relative to said diffractive surfaces.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.