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Wavefront sensing for adaptive optics (Record no. 16555)

MARC details
000 -LEADER
fixed length control field 02228nam a2200241Ia 4500
003 - CONTROL NUMBER IDENTIFIER
control field IN-BaIIA
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20211112100000.0
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 211028s9999 xx 000 0 eng d
040 ## - CATALOGING SOURCE
Transcribing agency IIA Library
080 ## - UNIVERSAL DECIMAL CLASSIFICATION NUMBER
Universal Decimal Classification number (043.2):535
Item number LAN
100 ## - MAIN ENTRY--PERSONAL NAME
Personal name Lancelot Chellaraj Thangadurai, J. P.
9 (RLIN) 30752
Relator term Author
245 #0 - TITLE STATEMENT
Title Wavefront sensing for adaptive optics
Statement of responsibility, etc. J. P. Lancelot Chellaraj Thangadurai
Medium [Ph.D Thesis]
260 ## - PUBLICATION, DISTRIBUTION, ETC.
Place of publication, distribution, etc. Bangalore
Name of publisher, distributor, etc. Indian Institute of Astrophysics
Date of publication, distribution, etc. 2007
300 ## - PHYSICAL DESCRIPTION
Extent xvi, 114p.
502 ## - DISSERTATION NOTE
Degree type Doctor of Philosophy
Name of granting institution Indian Institute of Astrophysics, Bangalore
Year degree granted 2007
520 ## - SUMMARY, ETC.
Summary, etc. A wavefront sensor in an adaptive optics system, measures the phase changes across the telescope pupil of the incident beam. The estimate of these errors is later used in a closed loop correction system to achieve close to diffraction limited optical quality. A new wavefront sensor based on polarization shearing interferometry technique using two crossed Babinet Compensators (BC) has been developed and studied. The necessary theory for shearing interferometry using BC has been developed. Simulations of the interferometric records were carried out for the study of various aberrations in an optical system and the effect of noise, ripple and atmospheric turbulence in the interferograms. The geometry of the optical set up for carrying out the laboratory experiments using Shack Hartmann and Polarization Shearing Interferometer wavefront sensors in the same set up have been described. The data reduction procedure for the estimation of wavefront errors from a single interferometric record using Fourier technique has been worked out. The actual results obtained from the laboratory experiments for both the sensors have been compared. The method provides a convenient alternative choice for wavefront sensing in an actual adaptive optics system for astronomical telescope. The suitability of this new wavefront sensor is highlighted.
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element Adaptive optics
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element Ph.D. Theses
9 (RLIN) 30753
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element Wavefront sensor
9 (RLIN) 30754
700 ## - ADDED ENTRY--PERSONAL NAME
Personal name A. K. Saxena
9 (RLIN) 30752
Relator term Supervisor
856 ## - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="http://prints.iiap.res.in/handle/2248/1730">http://prints.iiap.res.in/handle/2248/1730</a>
Link text Click Here to Access eThesis
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type Thesis & Dissertations
Source of classification or shelving scheme Universal Decimal Classification
Holdings
Withdrawn status Lost status Source of classification or shelving scheme Damaged status Not for loan Home library Current library Shelving location Date acquired Full call number Barcode Date last seen Price effective from Koha item type
    Universal Decimal Classification     IIA Library-Bangalore IIA Library-Bangalore General Stacks 06/08/2007 (043.2):535/ LAN 17477 05/11/2021 06/08/2007 Thesis & Dissertations

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