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An optical system for measuring the diopter and radius of curvature of the human eye

A technology of radius of curvature and optical system, applied in the field of optical system, can solve problems such as difficulty and displacement, and achieve the effect of accurate measurement accuracy

Active Publication Date: 2017-01-11
SHANGHAI ZHANZHI OPTICAL INSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is not easy to determine the precise position of the tested eye from the reflected light image displayed on the phoropter monitor
The measurement position of the eye may shift due to eye movement

Method used

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  • An optical system for measuring the diopter and radius of curvature of the human eye
  • An optical system for measuring the diopter and radius of curvature of the human eye
  • An optical system for measuring the diopter and radius of curvature of the human eye

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Embodiment Construction

[0027] The technical solutions of the present invention will be described in further detail through embodiments in conjunction with the accompanying drawings, but the protection scope of the present invention should not be limited thereto.

[0028] as attached figure 1 , 2 , shown in 3, an optical system capable of measuring the diopter of the human eye and the radius of curvature of the cornea, it includes a positioning monitoring optical path, a projection optical path, a measurement optical path, a foggy optical path and a corneal curvature measurement optical path, these five optical paths share optical elements, projection Four groups of light sources formed by illuminating lamp 201, white light lamp 301, positioning illuminating lamp 101, and illuminating lamp 501 respectively pass through dichroic prism 1 105, dichroic prism 2 106, dichroic reflector 205, perforated prism 204, and reflector 401 to generate light reflection Or refraction, forming a five-way light path o...

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Abstract

The invention provides an optical system for measuring eyes diopter and cornea curvature radius of a human. The system comprises a positioning monitoring light path, a projection light path, a measuring light path, a scieropia light path, and a cornea curvature measuring light path, which share an optical element. Compared with the prior art, the optical system has the technical effects that 1, a human eyes diopter measuring light path and the cornea curvature measuring light path are effectively combined in an optical system, and therefore, the human eyes diopter and cornea curvature can be accurately measured through an computer optometry unit; 2, the scieropia light path is adopted, by which the optimal cornea curvature testing state can be reached while the optic nerves of eyes to be tested are relaxed; the positioning monitoring light path enables accurate measuring precision after the distance from the eyes to be tested to the cornea curvature measuring light path is fixed; as a result, the eyes diopter and cornea curvature radius of human can be synchronously measured with one optometry unit.

Description

technical field [0001] The invention relates to an optical system for measuring the diopter of the human eye and the radius of curvature of the cornea, which relates to the technical field of optometry and imaging measurement, in particular to an optical system capable of measuring the diopter of the human eye and the curvature of the cornea. Background technique [0002] Whether in an ophthalmology department or an optical shop, optometry is an important auxiliary detection medical method. As an objective optometry instrument, the computer refractor emits a beam of infrared light of a specific wavelength, passes through the cornea, lens, aqueous humor, retina and other eye organs, and finally projects to the retina of the eye, and then reflects back to the corresponding optical system of the instrument Then, it is received by the CCD, which converts the optical signal into an electrical signal, decomposes the data of the spherical lens, cylindrical lens and axial position, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B3/103A61B3/107
Inventor 夏发云
Owner SHANGHAI ZHANZHI OPTICAL INSTR
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