Patent · US Active

Low cost fundus imager with integrated pupil camera for alignment aid

US12029486B2 · kind B2 · utility

0Cited by

42References

21Claims

0Family size

Assignee

Carl Zeiss Meditec AG · DE

Inventors

Jochen Straub · Erlangen, DE
Robert A. Sprowl · Sammamish, US
Yuan LIU · Dublin, US
Matthew J. Everett · Livermore, US

Key dates

Filing date	Sep 24, 2019
Grant date	Jul 9, 2024
Priority date	—
Expiry date	Mar 29, 2041

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61B3/158
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

A low cost fundus camera uses LED light sources placed adjacent the camera's imaging stop, and thereby eliminates the need for optics for introducing the light source to the camera's optical path. Lens reflex in the pupil relay is avoided by using only reflective optics in the pupil relay. Reflex from the LED is mitigated by actuating each LED separately, one at a time, and capturing a separate image with each actuated LED. Reflex-free regions of each captured image are extracted and combined to create a composite reflex-free image.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.