ELECTRONIC SHEAR INTERFEROMETRY - APPLICATION OF A (DOUBLE-) PULSED-LASER

• Type: Article in International Scientific Journal
• Date: 1993

Authors

SPOOREN, R (Author) Other; DYRSETH, AA (Author) Other; Mário Vaz (Author) FEUP

Journal

Title: Applied optics

Vol. 32

Pages: 4719-4727

ISSN: 0003-6935

Publisher: The Optical Society

Indexing

ISI Web of Knowledge - 18 Citations

ISI Web of Science

Scopus - 18 Citations

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

CORDIS: Technological sciences

Other information

Authenticus ID: P-001-MP0

Abstract (EN): The use of a double-pulsed laser in interferometric metrology relaxes the stability requirements for the experimental setup. The use of such a laser also makes it possible for one to study high-speed dynamic processes. We justify the use of a double-pulsed laser in electronic shear interferometry. We show how image subtraction can be applied to produce high-quality fringe patterns without a special aperture design. The fringe visibility is studied theoretically and is compared with the fringe visibility obtained when the closely related television-holography technique is used. The new double-pulse subtraction technique offers the possibility of compensation for laser intensity fluctuations that can affect the fringe visibility significantly in pulsed electronic shear interferometry.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9