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 |
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| 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 |
