US 9,788,718 B2Granted

Surgical microscope

AssigneeCarl Zeiss Meditec AG

InventorsChristoph Hauger, Artur Hoegele, Peter Reimer, Holger Matz, Joachim Steffen

Life of this patent

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Abstract

A surgical microscope for imaging structures of an eye includes: a front optical unit, an illumination device which has an illumination-radiation-emitting illumination source and which illuminates the retina of the eye with an illumination spot via an illumination beam path which extends through the front optical unit, a camera and an adjustable camera optical unit disposed upstream thereof, an imaging beam path which extends through the front optical unit and the camera optical unit, and a control device which controls the camera optical unit and sets the latter in such a way that the retina of the eye in the region of the illumination spot is imaged on the camera. The control device varies a focusing state of the camera optical unit and, as a result thereof, records a plurality of images of the retina in the region of the illumination spot, the images being focused in different depth planes, and establishes a refractive value of the eye from these images.

Claims12

Dependent claims

A surgical microscope for imaging structures of an eye, the surgical microscope comprising:

a front optical unit;
an adjustable camera optical unit;
the surgical microscope defining an illumination beam path extending through said front optical unit and an imaging beam path extending through said front optical unit and said adjustable camera optical unit;
an illumination device having an illumination-radiation-emitting illumination source and being configured to illuminate the retina of the eye with an illumination spot via said illumination beam path;
a camera;
said adjustable camera optical unit being disposed upstream of said camera with respect to said imaging beam path;
a control device configured to control said adjustable camera optical unit and set said adjustable camera optical unit so as to cause the retina of the eye to be imaged on said camera in the region of said illumination spot;
said control device being further configured to vary a focusing state of said adjustable camera optical unit and to record a plurality of images of the retina of the eye in the region of the illumination spot via said camera, said images being focused in different depth planes;
and,
said control device being further configured to establish a refractive value of the eye from said images.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/260,108Filed 8 Sep 2016
Priority: DE 10 2015 115 1068 Sep 2015
Published: US 2017/0065172 A19 Mar 2017
Granted: 17 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

A61B 3/103
Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions: for determining refraction, e.g.…
A61B 3/0025
Operational features thereof: characterised by electronic signal processing, e.g. eye models
A61B 3/0041
Operational features thereof: characterised by display arrangements
A61B 3/0075
Apparatus for testing the eyes; Instruments for examining the eyes: provided with adjusting devices, e.g. operated by control lever