An in-plane insensitive multiaperture speckle shear interferometer for slope measurement

✍ Scribed by R.S. Sirohi; N.Krishna Mohan

• Book ID: 104160109
• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 286 KB
• Volume: 29
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/s0030-3992(97)00027-3

✦ Synopsis

A modified two-aperture speckle shear interferometer that eliminates the contribution of the in-plane component and its derivative to the phase change, and yields a fringe pattern corresponding to the first-order partial derivatives of the outof-plane displacement component, is reported in this note. In this method, two laterally sheared object points are viewed axially. The wave fields from these points are independently combined at the image plane of the imaging system.