Search Images Maps Play YouTube Gmail Drive Calendar More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberWO2007082146 A3
Publication typeApplication
Application numberPCT/US2007/060136
Publication date13 Dec 2007
Filing date5 Jan 2007
Priority date5 Jan 2006
Also published asWO2007082146A2
Publication numberPCT/2007/60136, PCT/US/2007/060136, PCT/US/2007/60136, PCT/US/7/060136, PCT/US/7/60136, PCT/US2007/060136, PCT/US2007/60136, PCT/US2007060136, PCT/US200760136, PCT/US7/060136, PCT/US7/60136, PCT/US7060136, PCT/US760136, WO 2007/082146 A3, WO 2007082146 A3, WO 2007082146A3, WO-A3-2007082146, WO2007/082146A3, WO2007082146 A3, WO2007082146A3
InventorsAlan Shinn, Don Yancey, Urban Schnell, Charles E Campbell, Joel Niederhauser
ApplicantDaphne Instr Inc, Alan Shinn, Don Yancey, Urban Schnell, Charles E Campbell, Joel Niederhauser
Export CitationBiBTeX, EndNote, RefMan
External Links: Patentscope, Espacenet
Autorefractor for detecting light intensities to extract higher-order refractions and method for use
WO 2007082146 A3
An autorefractor is capable of determining higher order refraction characteristics of a patient's eye. An incident light beam projects into the patient's eye, producing a refracted light beam, which passes through a detector lens to produces a converged beam falling upon first and second sensors. Focal length of the detector and/or sensor position are variable. Focal length and/or position are changed so that one of the sensors lies in a position that corresponds to a retinal conjugate of the patient's eye, and first photosensor data is gathered. The first photosensor data is analyzed to determine retinal deep scatter. Then, the focal length and/or sensor position is changed so that the converged light that falls upon the sensor takes up a relatively larger area, producing second photosensor data. The determined retinal deep scatter from first photosensor data is subtracted from the second photosensor data.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
EP1021985A1 *15 Jan 200026 Jul 2000Leica Microsystems Inc. , Ophthalmic Instruments DivisionOphthalmic instrument having self-calibrating optical system
US5684561 *27 Jun 19944 Nov 1997Daphne Eye TechnologiesDevice and method for evaluation of refraction of the eye
US6042232 *21 Jan 199928 Mar 2000Leica Microsystems Inc.Automatic optometer evaluation method using data over a wide range of focusing positions
US6369954 *7 Oct 19989 Apr 2002Universite Joseph FourierLens with variable focus
US6761454 *13 Feb 200213 Jul 2004Ophthonix, Inc.Apparatus and method for determining objective refraction using wavefront sensing
International ClassificationA61B3/14
Cooperative ClassificationG01J1/0448, A61B3/1015
European ClassificationA61B3/10F, A61B3/103
Legal Events
17 Oct 2007121Ep: the epo has been informed by wipo that ep was designated in this application
8 Jul 2008NENPNon-entry into the national phase in:
Ref country code: DE
11 Feb 2009122Ep: pct application non-entry in european phase
Ref document number: 07709961
Country of ref document: EP
Kind code of ref document: A2