Abstract
In this progress report, the authors discuss the use of a laser beam, propagating freely in air, as a reference line for profilometry with a large travel length. The reference beam is detected by a position-sensitive detector and any variation is compensated physically by a two-axis flexure system in closed loop operation. Air turbulence is the main obstacle for the stability of the reference system. It is shown that the relative positions of the position-sensitive detector and the height measurement system is critical for correcting the rotational error of the carriage.
Original language | English |
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Title of host publication | Large Lenses and Prisms |
Editors | Richard G. Bingham, David D. Walker |
Publisher | SPIE |
Pages | 161-170 |
Number of pages | 10 |
Volume | 4411 |
ISBN (Print) | 0819441147, 9780819441140 |
DOIs | |
Publication status | Published - 5 Feb 2002 |
Externally published | Yes |
Event | Large Lenses and Prisms - London, United Kingdom Duration: 27 Mar 2001 → 30 Mar 2001 https://www.spiedigitallibrary.org/conference-proceedings-of-spie/4411.toc |
Publication series
Name | Proceedings of SPIE - The International Society for Optical Engineering |
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Publisher | SPIE |
Volume | 4411 |
ISSN (Print) | 0277-786X |
ISSN (Electronic) | 1996-756X |
Conference
Conference | Large Lenses and Prisms |
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Country/Territory | United Kingdom |
City | London |
Period | 27/03/01 → 30/03/01 |
Internet address |