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Title: High frame-rate, large field wavefront sensor

Abstract

A two-stage intensified 192 {times} 239 pixel imager developed by Eastman Kodak for motion analysis was used to construct a 1 kHz frame-rate Hartmann wavefront sensor. The sensor uses a monolithic array of lenslets with a focal length that is adjusted by an index fluid between the convex surface and an optical flat. The accuracy of the calculated centroid position, which is related to wavefront measurement accuracy, was obtained as a function of spot power and spot size. The sensor was then dynamically tested at a 1 kHz frame-rate with a 9 {times} 9 lenslet array and a fast steering mirror, which swept a plane wavefront across the wavefront sensor. An 8 cm diameter subaperture will provide a return signal (589 nm) level of about 1000 photons/ms using the AVLIS 1 kW laser (stretched pulse) as guide star source, which is sufficient to yield a wavefront measurement of better than {gamma}/10 rms. If an area of 6 {times} 6 pixels per Hartmann spot were allocated, this wavefront sensor could support a 32 {times} 32, or 1024, element deformable mirror.

Authors:
; ; ; ;  [1];  [2]
  1. Lawrence Livermore National Lab., CA (United States)
  2. Eastman Kodak Co., Rochester, NY (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10170311
Report Number(s):
UCRL-JC-109552; CONF-9203139-2
ON: DE92019547
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Laser guide star adaptive optics workshop,Albuquerque, NM (United States),10-12 Mar 1992; Other Information: PBD: Mar 1992
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 42 ENGINEERING; IMAGE INTENSIFIERS; TESTING; TELESCOPES; ALIGNMENT; CAMERAS; PHOTOCATHODES; LASER GUIDANCE; LENSES; FOCUSING; BEAM OPTICS; ASTRONOMY; LASER RADIATION; 661300; 426002; OTHER ASPECTS OF PHYSICAL SCIENCE; LASERS AND MASERS

Citation Formats

Avicola, K, Salmon, J T, Brase, J, Waltjen, K, Presta, R, and Balch, K S. High frame-rate, large field wavefront sensor. United States: N. p., 1992. Web.
Avicola, K, Salmon, J T, Brase, J, Waltjen, K, Presta, R, & Balch, K S. High frame-rate, large field wavefront sensor. United States.
Avicola, K, Salmon, J T, Brase, J, Waltjen, K, Presta, R, and Balch, K S. 1992. "High frame-rate, large field wavefront sensor". United States.
@article{osti_10170311,
title = {High frame-rate, large field wavefront sensor},
author = {Avicola, K and Salmon, J T and Brase, J and Waltjen, K and Presta, R and Balch, K S},
abstractNote = {A two-stage intensified 192 {times} 239 pixel imager developed by Eastman Kodak for motion analysis was used to construct a 1 kHz frame-rate Hartmann wavefront sensor. The sensor uses a monolithic array of lenslets with a focal length that is adjusted by an index fluid between the convex surface and an optical flat. The accuracy of the calculated centroid position, which is related to wavefront measurement accuracy, was obtained as a function of spot power and spot size. The sensor was then dynamically tested at a 1 kHz frame-rate with a 9 {times} 9 lenslet array and a fast steering mirror, which swept a plane wavefront across the wavefront sensor. An 8 cm diameter subaperture will provide a return signal (589 nm) level of about 1000 photons/ms using the AVLIS 1 kW laser (stretched pulse) as guide star source, which is sufficient to yield a wavefront measurement of better than {gamma}/10 rms. If an area of 6 {times} 6 pixels per Hartmann spot were allocated, this wavefront sensor could support a 32 {times} 32, or 1024, element deformable mirror.},
doi = {},
url = {https://www.osti.gov/biblio/10170311}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Mar 01 00:00:00 EST 1992},
month = {Sun Mar 01 00:00:00 EST 1992}
}

Conference:
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