Jaydeep K. Sinha Hareesh V. Tippur Auburn University Department of Mechanical Engineering 202 Ross Hall Auburn, Alabama 36849-5341 E-mail: [email protected] Abstract. A real-time, full-field, noncontacting infrared Twyman-Green interferometer for performing deformation measurements has been developed. The choice of the wavelength offers the advantage of using the interferometer with struct...

PEP-II transverse profiles are measured by imaging visible synchrotron light from dipoles in the two rings. The images are broadened by surface errors on the primary extraction mirrors, which have a complex design due to high beam currents. To improve vertical beam-size measurements, we installed a synchrotron-light interferometer, following Mitsuhashi at KEK. In a two-slit interferometer, fine...

Optical fiber Sagnac loop as a interferometer (SLI), is a useful component utilized in devices and systems of optical technology [1,2]. As of today, several components based on SLI, have been designed for applications of wavelength division multiplexing (WDM) filters and optical sensors, using conventional and photonic crystal fibers [3-6]. In an SLI, two interfering waves in an optical fiber l...

Digital speckle image correlation techniques have been successfully proven to be an accurate displacement analysis tool for a wide range of applications. In this paper, a new Electronic Laser Speckle Pattern Interferometer based on Michelson interferometer is designed. An object beam back scattered of an object surface and a reference beam, originating from the same laser light source are super...

In optical testing, when the wave-front error of a test optic is much larger than the wavelength of visible light, it may be difficult to analyze the closely spaced interference fringes in the interferogram. The use of a less-sensitive testing technique or a long-wavelength interferometer would be preferred for this purpose. In addition, when the optic is to be tested in transmission, the wavel...

A prototype two-telescope stellar interferometer with a 1.5-m base line has been used to track the white-light fringes, 0.4-0.9 microm, from Polaris. Continuous fringe phase and amplitude measurements were made with ~220-photon/4-msec integration time and 1.27-cm(2) collecting area under 2-arc sec seeing conditions. The same control algorithm should be able to track fringes from an 8.7-mg star ...

Interferometers using atoms rather than light can measure acceleration and rotation to high precision. Because atoms are slower than light, atom interferometers have the potential to reach greater inertial sensitivity than their optical counterparts. However, one of the main limitations in atomic interferometry has been discriminating the different contributions to the interference signal. Brig...

In this paper a method of taking widefield heterodyne interferograms using a prototype modulated light camera is described. This custom CMOS modulated light camera (MLC) uses analogue quadrature demodulation at each pixel to output the phase and amplitude of the modulated light as DC voltages. The heterodyne interference fringe patterns are generated using an acousto-optical frequency shifter (...

We present a newly developed single mode fiber based swept source polarization sensitive optical coherence tomography system using a single input state at 1040 nm. Two non-polarizing fiber based beam splitters are combined to form a Mach-Zehnder interferometer, while two polarizing beam splitters are used to obtain a polarization sensitive detection. Both types of beam splitters solely feature ...

We report on a compact interferometer for the water-window soft-x-ray range that is suitable for operation with laser-plasma sources. The interferometer consists of a single diffractive optical element that focuses impinging x rays to two focal spots. The light from these two secondary sources forms the interference pattern. The interferometer was operated with a liquid-nitrogen jet laser-plasm...