Title:
SEQUENTIAL WAVEFRONT SENSOR
Document Type and Number:
WIPO Patent Application WO/2007/087058
Kind Code:
A8
Abstract:
A sequential wavefront sensor comprises a light beam scanning module (212), a sub-wavef ront focusing lens (220), a detector (222) with more than one photosensitive area and a processor for calculating the sequentially obtained centroids of a number focused light spots from the sub-wavefront s to determine the aberration of the input wavefront. A sequential wavefront sensing method comprises the steps of; sequentially projecting a number of sub-wavefronts onto a sub-wavefront focusing lens and a detector with more than one photosensitive areas, calculating the centroid of the focused light spot from each sub-wavefront, and processing the centroid information to determine the aberration of the wavefront. In particular, a method for auto-focusing and/or auto-astigmatism-correction comprises the steps of sequentially projecting a number of sub-wavef ronts around an annular ring of a wavefront to a sub-wavefront focusing lens and a detector, calculating the centroid of focused light spot from each sub-wavefront to figure out the centroid trace and hence the defocus and/or astigmatism, adjusting the focus and/or astigmatism of the optical imaging system before the wavefront sensor so that the measured defocus and/or astigmatism is minimized.
Inventors:
SU WEI (US)
ZHOU YAN (US)
ZHAO QING CHUN (US)
ZHOU YAN (US)
ZHAO QING CHUN (US)
Application Number:
PCT/US2006/049112
Publication Date:
May 28, 2015
Filing Date:
December 21, 2006
Export Citation:
Assignee:
CLARITY MEDICAL SYSTEMS (US)
SU WEI (US)
SU WEI (US)
International Classes:
G01J9/00; A61B3/12; G01J3/06
Attorney, Agent or Firm:
STRACKER, Elaine, C. (LLP3160 College Avenue, Suite 20, Berkeley CA, US)
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