Photorefractive crystals are gaining importance as a recording medium due to the possibility of real-time operations. A BaTiO3 crystal can be used as a recording medium in two configurations, i.e., when the phase shift φ between the dynamic grating and the interference pattern is φ=±π/2. The optical characteristics are different for the two configurations. We discuss the optical characteristics of BaTiO3 crystal under the two configurations, and use the BaTiO3 for speckle photography and image plane holography. © 1994 SPIE. All rights reserved.

P. R. Sreedhar

Nandigana Krishna Mohan

Rajpal Singh Sirohi

Barium titanate

HOLOGRAPHIC INTERFEROMETRY

Interferometry

Optical data processing

Optical variables measurement

PHOTOREFRACTIVE CRYSTALS

DEFORMATION STUDIES

DYNAMIC GRATINGS

IMAGE PLANE

INTERFERENCE PATTERNS

Optical characteristics

Real-time operation

RECORDING MEDIUM

SPECKLE PHOTOGRAPHY

Chromium compounds

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Deformation studies with BaTiO3 Crystal as a recording medium

Proceedings of SPIE - The International Society for Optical Engineering

A two-beam coupling configuration using a BaTiO3 crystal as recording medium for real-time displacement measurement of distant objects using a high coherent source such as frequency-doubled diode-pumped Nd: YAG laser is presented in this paper. Long coherence length of the laser permits to study the objects which are far away from the BaTiO3 crystal. The requirement however, is that both the objects and the recording stage should be vibration isolated, and influence of intervening medium must be negligible. © 1998 Published by Elsevier Science Ltd. All rights reserved.

Optics and Lasers in Engineering

Speckle Photography with BaTiO3 Crystal for the Measurement of In-plane Displacement Field Distribution of Distant Objects

Optical Engineering

Real-time speckle photography with two-wave mixing in photorefractive BaTi03 crystals

Optics Communications

Speckle metrology with novelty filtering using photorefractive two-beam coupling in BaTiO3 crystal

Optics Letters

Holographic interferometry using anisotropic self-diffraction in Bi_12SiO_20

Applied Optics

Novel concept for obtaining continuously variable topographic contour mapping using holographic interferometry

Two-wave mixing and energy transfer in Bi_12SiO_20 crystals: application to image amplification and vibration analysis

Deformation studies with BaTiO3 Crystal as recording medium

Journal	Data powered by TypesetProceedings of SPIE - The International Society for Optical Engineering
Publisher	Data powered by TypesetSPIE
ISSN	0277786X
Open Access	No