Digital laser scanning fundus camera

Abstract

Imaging and documentation of the human retina for clinical diagnostics are conventionally achieved by classical optical methods. We designed a digital laser scanning fundus camera. The optoelectronical instrument is based on scanning laser illumination of the retina and a modified video imaging procedure. It is coupled to a digital image buffer and a microcomputer for image storage and processing. Aside from its high sensitivity the LSF incorporates new ophthalmic imaging methods like polarization differential contrast. We give design considerations as well as a description of the instrument and its performance.

Three-Dimensional Confocal Microscopy of the Living Human Eye

“…A diffraction limited spot of light is scanned over a region of the specimen. The reflected light imaged by the microscope objective is descanned by the galvanometer scanning mirrors and imaged onto an iris diaphragm, or a pinhole aperture located in front of the photomultiplier detector (64,65). A recent development in clinical confocal microscopy is the scanning laser ophthalmoscope developed by Robert Webb and coworkers (66)(67)(68).…”

Scanning laser ophthalmoscope fundus cyclometry in near-natural viewing conditions

“…The Scanning laser ophthalmoscope (SLO) [9,15] meets requirements (1)- (3): an infrared laser beam is focused onto the retina and scans the posterior pole 25 times per second. The unique properties of the optical pathways allow the registration of reflected light without pupil dilatation.…”

Optical Diagnostic in Medicine - Needs and Possibilities

“…Initially the confocal laser ophthalmoscopes were treated as digital funduscameras [35]. The rules of confocal detection in connection with the specific characteristics of the laser radiation were used among other things in devices designed for digital angiography.…”