Patent
Two-dimensional OCP wavefront sensor employing one-dimensional optical detection
Reads0
Chats0
TLDR
In this paper, an improved two-dimensional optical centroid processor (OCP) wavefront sensor is described in which a scanning mirror 146 scans the wavefront of input light 130 to provide a scanned beam 148 (i.e. a portion of the wave front).Abstract:
An improved two-dimensional optical centroid processor ("OCP") wavefront sensor is described in which a scanning mirror 146 scans the wavefront of input light 130 to provide a scanned beam 148 (i.e. a portion of the wavefront). The scanned beam 148 is focused on an OCP 168 filter comprising four rows of mask cells. The filtered light emanating from the cells impinges on one-dimensional photodetector devices 192, 198, 202, 206 (i.e. photodetector rows). Thus, the scanning of the wavefront by the scanning mirror provides two-dimensional measurement while employing one-dimensional photodetector devices. Each of the photodetector devices provides an output to a ratio calculator 201 which is used to correct the tilt in the wavefront by driving a deformable mirror (not shown).read more
Citations
More filters
Patent
Wavefront measuring system with integral geometric reference (igr)
TL;DR: In this article, a geometric sensor includes a Monolithic Lenslet Module (MLM) subaperture array (22) having a plurality of microlenses (40), each of which have an opaque center marking formed concentric with the micolens optical axis.
Patent
Apparatus and method for operating a real time large diopter range sequential wavefront sensor
TL;DR: A wavefront sensor includes a light source configured to illuminate a subject eye, a detector, a first beam deflecting element configured to intercept a wavefront beam returned from a subject-eye when the subject eye is illuminated by the light source and configured to direct a portion of the wavefront from the subjecteye through an aperture toward the detector and a controller, coupled to the light sources and the beam-deflecting element, configured to control the beam deflection element to deflect and project different portions of an annular ring portion of wavefront as mentioned in this paper.
Patent
Apparatus and method for evaluating a target larger than a measuring aperture of a sensor
TL;DR: In this article, a wavefront sensor and an object are translated relative to one another to measure the wavefronts at a plurality of subregions of the object, and then stitched together to form a wave front.
Patent
Large diopter range real time sequential wavefront sensor
Yan Zhou,William Shea +1 more
TL;DR: In this article, a large dynamic range sequential wavefront sensor for vision correction or assessment procedures is described, where the wavefront beam from an eye within a large eye diopter range is made to reside within a desired physical dimension over a certain axial distance range in a wavefront image space and/or a Fourier transform space.
Patent
Sequential wavefront sensor
Wei Su,Yan Zhou,Qing Chun Zhao +2 more
TL;DR: In this article, the authors proposed a method for auto-focusing and/or auto-astigmatism-correction, which consists of sequentially projecting a number of subwavefronts 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, adjusting the focus and or astigmatism of the optical imaging system before the wavefront sensor.
References
More filters
Patent
Optical wavefront sensing system
Allan Wirth,Julius Feinleib,Lawrence E. Schmutz,Douglas H Rapkine,Robert F Dillon,John J Hizny +5 more
TL;DR: In this paper, a wavefront sensor for detecting distortion in light wavefronts is described in which the wavefront is divided into a plurality of sub-apertures and light amplified or intensified and imaged as spots of light from each subaperture onto a filter mask.
Patent
Sensor system for detecting wavefront distortion in a return beam of light
TL;DR: In this paper, an improved Hartmann-type wavefront sensor with a modulated reference beam of light is presented. But the use of a modulating reference beam eliminates the necessity for precise optical alignment, which is difficult or impossible to maintain in most operating environments.
Patent
Linear-scanned-array wavefront sensor
TL;DR: In this paper, a plurality of sample beam wavefronts derived from selected portions of a wide-aperture outgoing optical beam wave front enter an entrance pupil (11) located adjacent a focal surface on which the sample beams are individually focussed.