Systems and methods for broad line fundus imaging

Patent metadata

Field	Value
Publication number	US-2022211268-A1
Application number	US-202217687517-A
Country	US
Kind code	A1
Filing date	Mar 4, 2022
Priority date	Mar 15, 2013
Publication date	Jul 7, 2022
Grant date	—

Abstract

Systems and methods for Broad Line Fundus Imaging (BLFI), an imaging approach that is a hybrid between confocal and widefield imaging systems, are presented. These systems and methods are focused on improving the quality and signal of broad line fundus images or imaging methods to create high contrast and high resolution fundus images. Embodiments related to improved pupil splitting, artifact removal, reflex minimization, adaptable field of view, instrument alignment and illumination details are considered.

First claim

1 - 15 . (canceled)

16 . A system for imaging the eye of a patient, said system comprising:
a light source providing radiation; a scanning mechanism scanning the radiation over a range of transverse locations of the eye; a detector collecting light returning from the eye and generating output signals in response thereto; a pupil-splitting mechanism offset from the scanning mechanism and not positioned conjugate to the scanning mechanism, the pupil-splitting mechanism spatially separating radiation from the light source to the eye from light returning from the eye to the detector; and an electronic processor generating an image from the output signals, and displaying or storing the image for further processing.

17 . The system of claim 16 , wherein the pupil-splitting mechanism receives scanned light returning from the eye and directs the received scanned light towards the detector without descanning.

18 . The system of claim 16 , further comprising a second scanning mechanism positioned within a detection path from the eye to the detector, wherein the pupil-splitting mechanism is positioned in front of the second scanning mechanism in the detection path.

19 . The system of claim 16 , wherein the pupil-splitting mechanism includes a stationary mirror separating light returning from the eye from radiation to the eye, and directing light returning from the eye towards the detector.

20 . The system of claim 16 , wherein:
the light source provides radiation at multiple distinct frequency ranges; and at each transverse location within a single scan sweep of the scanning mechanism, the light source sequentially illuminates the transverse location with each of the multiple distinct frequency ranges and the detector sequentially collects returning light from each of the multiple distinct frequency ranges before the scanning mechanism proceeds to a subsequent transverse location within the single scan sweep.

Assignees

• Zeiss Carl Meditec Inc

Inventors

• Bublitz Daniel
• Everett Matthew J
• Farkas Csaba
• Kempe Michael
• Qiu Yue
• Schmitt-Manderbach Tobias

Classifications

• G02B21/0028

  specially adapted for specific applications, e.g. for endoscopes, ophthalmoscopes, attachments to conventional microscopes · CPC title

• A61B3/1025 Primary

  for confocal scanning · CPC title

• G02B21/0032

  Optical details of illumination, e.g. light-sources, pinholes, beam splitters, slits, fibers (G02B21/0036 - G02B21/008; means for illumination of specimens in general G02B21/06) · CPC title

• A61B3/12

  for looking at the eye fundus, e.g. ophthalmoscopes (A61B3/13 takes precedence) · CPC title

• A61B3/14 Primary

  Arrangements specially adapted for eye photography · CPC title