Autodyne detection laser velocimeter

US5825465A · kind A · utility

Assignee

• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventors

• Philippe Nerin · Saint-Affrique, FR
• Pascal Besesty · Échirolles, FR
• Herve Giraud · St-Estève, FR
• Andre Mouttet · Seyssinet-Pariset, FR

Key dates

• Filing date: Jul 17, 1997
• Grant date: Oct 20, 1998
• Expiry date: Jul 17, 2017

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01S3/0627
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Autodyne laser velocimeter comprising: PA1 a microlaser (10) capable of emitting respectively a first (40) and second (42) beam, PA1 pumping means (12) capable of supplying a pumping beam light to the microlaser, PA1 optical means (14) capable of directing the first beam (40) at a target (50) and of sending the light re-emitted by the target (50) to the microlaser (10), PA1 photoelectric detection means (16) of receiving the second beam and emitting a detection signal corresponding to a modulation in the intensity of the second beam, and PA1 means (17) of processing the detection signal to determine a characteristic magnitude of a displacement velocity of the target. Application to metrology.