Displacement sensor device and system

US10670622B2 · kind B2 · utility

Assignee

• PGS Geophysical AS · NO

Inventors

• Ib-Rune Johansen · Oslo, NO
• Matthieu Lacolle · Nordnesøy, NO
• Thor Bakke · Dresden, DE
• Andreas Vogl · Unterbechingen, DE
• Dag Thorstein Wang · Oslo, NO
• Sverre Knudsen · Trondheim, NO
• Odd Løvhaugen · Oslo, NO
• Hallvard Angelskår · Oslo, NO
• Zeljko Skokic · Oslo, NO

Key dates

• Filing date: Jan 18, 2019
• Grant date: Jun 2, 2020
• Expiry date: Jan 18, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B26/0808
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The present invention relates to a displacement sensor device and the system including the device, wherein the device comprises a first at least partially transparent plane surface with a first diffraction pattern and a second plane surface comprising a second reflecting diffraction pattern. The diffractive patterns being adapted to diffract light within a chosen range of wavelengths, the second surface being positioned below and parallel to the first surface constituting a pair wherein said first and second diffractive patterns being essentially equal, the device also comprising displacement means for allowing a movement in a direction parallel to said surfaces, the device thus providing a movement sensitive diffraction pattern.