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EP0299710A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Ophthalmic disease detection apparatus

Assignee: Kowa Co Ltd
•
Filing: 1988-07-12
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Granted: —
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Expires: 2008-07-12
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Abstract

Abstract An apparatus for detecting ophthalmic diseases such as an inflammation in a patient's eye (11) includes means of focusing a laser beam (L) at a selected spot (P) in the eye. The light scattered from the eye is photoelectrically detected through a mask (26) with a slit (26a) and converted into an electrical signal which is subsequently used to determine the protein concentration essential to ophthalmic disease detection in the patient's eye. A light shield member (61) for blocking diffused light from the eye or scattered light from the laser beam is provided in the slit (26a) to improve the S/N ratio of the electrical signal to be processed.

Inventors

  • 👤 Susumu Mizuta

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 18:56
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/117

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 77 words
An apparatus for detecting opthalmic diseases in a patient's eye, in which a laser beam is projected at a selected spot in the patient's eye and light scattered therefrom is received on a photoelectrical converter through a mask formed thereon with a slit for conversion into an electrical signal, characterized in that a light shield means (61) is provided in said slit (26a) for blocking diffused light from the eye or scattered light from said laser beam.
Claim 2
Independent Claim 77 words
An apparatus for detecting opthalmic diseases in a patient's eye, in which a laser beam is projected at a selected spot in the patient's eye and light scattered therefrom is received on a photoelectrical converter through a mask formed thereon with a slit for conversion into an electrical signal, characterized in that a light shield means (61) is provided in said slit (26a) for blocking diffused light from the eye or scattered light from said laser beam.
Claim 3
Dependent Claim 35 words
An apparatus as set forth in claim 1, wherein said light shield means (61) is constructed as a line-shaped stop several times thicker than an image of said laser beam formed on said slit (26).
Claim 4
Dependent Claim 31 words
An apparatus as set forth in claim 1, wherein said light shield means (61) is displaceable within said slit (26) perpendicularly to a direction along which said light shield means extends.

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