Automatic defocusing compensation human eye aberration Hartmann measuring instrument

A human eye aberration and measuring instrument technology, which is applied in the fields of eye testing equipment, medical science, diagnosis, etc., to achieve the effect of improving measurement accuracy and practicability

Active Publication Date: 2010-08-18
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The technical problem solved by the present invention is to overcome the shortcomings of existing aberration measuring instruments, effectively realize the automatic defocus compensation of human eye aberration without increa

Method used

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  • Automatic defocusing compensation human eye aberration Hartmann measuring instrument
  • Automatic defocusing compensation human eye aberration Hartmann measuring instrument
  • Automatic defocusing compensation human eye aberration Hartmann measuring instrument

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Embodiment Construction

[0012] Such as figure 1 As shown, the automatic defocus compensation Hartmann measuring instrument for human eye aberration includes: near-infrared light-emitting diode 2, first beam splitter 3, pupil imaging objective lens 4, pupil camera 5, front group focusing objective lens 6, rear group focusing Objective lens 7, second beam splitter 8, third beam splitter 9, aperture matching system 10, first mirror 11, rotating beacon device 12, beacon light collimation system 13, LD semiconductor laser 14, target system 15, small Aperture diaphragm 16, computer system 17 and Hartmann wavefront sensor 18, wherein computer system 17 comprises automatic defocus compensation system, and automatic defocus compensation system is made of defocus adjustment control module and image analysis control module; Hartmann wave The front sensor is composed of an aperture division element and a photodetector; the rear group focusing objective lens 7, the second beam splitter 8, the third beam splitter ...

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Abstract

The invention relates to an automatic defocusing compensation human eye aberration Hartmann measuring instrument, which consists of a light source, a light beam wave filter system, a light beam matching system, a hole diameter cutting element, a photodetector, a computer system and a fixed part, wherein the fixed part consists of a human eye support frame and a front group of focusing objective lens, the computer system comprises an automatic defocusing compensation system, the automatic defocusing compensation system consists of a defocusing regulation control module and an image analysis control module, the hole diameter cutting element and the photodetector form a Hartmann wave-front sensor, and other parts are placed in a case of the measuring instrument for forming a movable part capable of transversely moving fore and aft expect the fixed part and the computer system. The focusing operation is realized through the fore-and-aft movement of the movable part corresponding to the fixed part. The defocusing regulation control module collects Hartmann light spot images in different positions. The image analysis control module analyzes the geometrical characteristics of the Hartmann light spots for determining the optimal defocusing compensation amount to realize the automatic defocusing compensation on human eyes to be detected, and an aberration measuring instrument completes the measurement of the human eye aberration on the basis.

Description

technical field [0001] The invention relates to a Hartmann measuring instrument for automatic defocus compensation of human eye aberration. Background technique [0002] The research on higher-order aberrations of the human eye has become the focus of international optometry research, and the measurement of higher-order aberrations of the human eye has also become the development trend of international ophthalmology testing. The human eye aberration Hartmann measuring instrument (hereinafter referred to as the aberration measuring instrument) developed by the Institute of Optoelectronic Technology of the Chinese Academy of Sciences has realized the accurate measurement of high-order aberrations of living human eyes (relevant achievements have obtained patent authorization announcement numbers CN 2683020Y, CN 2683021Y , CN 2698271Y and CN 2698270Y; and Patent Publication No. CN1601231A), after that, the Institute of Optoelectronic Technology of the Chinese Academy of Sciences...

Claims

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Application Information

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IPC IPC(8): A61B3/00
Inventor 张雨东鲍华饶长辉戴云凌宁余翔
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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