title: White light lateral shear interferometer with holographic shear lenses and spatial Fourier transform.
abstract: Lateral shear interferometer is a simple yet powerful method for testing wavefronts or measuring refractive index changes. Previously, we have reported a method of using two holographic lenses to obtain shear and to generate a spatial frequency carrier, which was used for quantitative analysis. This technique has some advantages such as stability and instantaneous measurements. In this Letter, we report a method of using white light with holographic gratings to obtain shear and also to perform wavefront analysis using the spatial carrier fringes generated at a specific selected wavelength from the white light spectrum. We show that the sensitivity of the setup can be changed by selecting different wavelengths from the spectrum.
authors: Charles
authors: C
authors: Joenathan
authors: Yanzeng
authors: Y
authors: Li
authors: Wanseok
authors: W
authors: Oh
authors: Robert M
authors: RM
authors: Bunch
authors: Ashley
authors: A
authors: Bernal
authors: Scott R
authors: SR
authors: Kirkpatrick
mesh_terms: D003116:Color; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005583:Fourier Analysis; D006696:Holography / Q000295:instrumentation*; D007368:Interferometry / Q000295:instrumentation*; D007834:Lasers; D007909:Lenses; D012031:Refractometry / Q000295:instrumentation*