Improvements in and relating to ophthalmoscopes

An ophthalmoscope, eye technology, applied in the field of deviation correction, which can solve problems such as blurring, loss of fidelity of retinal spatial information, and dimming

Active Publication Date: 2014-11-05
OPTOS PLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, retinal spatial information may be lost or recorded with a lower fidelity than theoretically possible
In particular, blurri

Method used

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  • Improvements in and relating to ophthalmoscopes
  • Improvements in and relating to ophthalmoscopes
  • Improvements in and relating to ophthalmoscopes

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0038] see figure 1 The ophthalmoscope 10 includes a light source 12 emitting a light beam 13, scan relay elements (including a first scan element 14, a second scan element 16, a scan compensation element 18 and a scan transfer element 20). The first scanning element 14 comprises a rotating polygonal mirror and the second scanning element 16 comprises an oscillating plane mirror. The scan compensation element 18 comprises an ellipsoidal mirror and the scan transfer element 20 comprises an aspherical mirror. The ophthalmoscope 10 also includes aberration correction elements (not shown).

[0039] A light source 12 directs an incident light beam 13 to a first scanning element 14 . This produces a beam scan in the first vertical dimension (shown as rays A, B and C). The incident light beam impinges on the scan compensation element 18 and is reflected therefrom to the second scan element 16 . This produces a scan of the incident beam in the second horizontal dimension. The inc...

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PUM

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Abstract

A scanning laser ophthalmoscope for scanning the retina of an eye is provided comprising a light source emitting a beam of light, scan relay elements, wherein the light source and the scan relay elements provide a two-dimensional scan of the light beam which is transferred from an apparent point source at a pupillary point of the eye to the retina of the eye, and a static aberration correction element (30) which has a shape defined to provide correction of aberrations of at least some of the scan relay elements and a location within the ophthalmoscope chosen to provide correction of aberrations of at least some of the scan relay elements, which location maintains transfer of the beam of light from the apparent point source at the pupillary point of the eye to the retina of the eye. The present solution further provides an aberration correction element and a method of determining a shape of the aberration correction element.

Description

technical field [0001] The present invention relates to improvements in and relating to ophthalmoscopes, in particular to corrections for aberrations in images introduced by ophthalmoscope systems. Background technique [0002] An ophthalmoscope typically includes a system for directing light from a light source to a portion of the subject's retina aligned with the object plane of the ophthalmoscope, and for collecting light reflected from the portion of the subject's retina in a detector. Collectively, a number of optical elements and scanning elements (collectively referred to as scan relay elements) are used to direct and collect light, and the collected light is used to form an image of the portion of the subject's retina. Due to the optical properties of the scan relay elements, especially in relation to wide field scan relay elements, deviations can occur in ophthalmoscope systems. For this reason, retinal spatial information may be lost or recorded with a lower fidel...

Claims

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Application Information

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IPC IPC(8): A61B3/12
CPCG02B27/0087G02B27/0031A61B3/1225G03H2223/13G02B27/0025A61B3/1025
Inventor G·穆约D·斯旺
Owner OPTOS PLC
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