Compensating mechanism of human eyes wave-front optical aberration measurement and correct system

A technology of wavefront aberration and compensation device, which is applied in optometry, retinoscopy, optics, etc. It can solve the problems of speed, precision limitation, and difficulty in calculating the movement amount accurately, so as to reduce the deformation requirement and improve the human eye image. Poor measurement and correction accuracy, increased stability effect

Inactive Publication Date: 2008-08-27
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

Using the method of manual platform, the speed and accuracy are greatly limited, and the movement amount is also difficult to calculate accurately

Method used

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  • Compensating mechanism of human eyes wave-front optical aberration measurement and correct system
  • Compensating mechanism of human eyes wave-front optical aberration measurement and correct system

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Embodiment Construction

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0017] Such as figure 1 As shown, the human eye wavefront aberration measurement and correction system includes a beacon light source 1 composed of LD semiconductor lasers, a focusing system 2, a mirror 3, a beam splitter 4, the measured human eye 5, and a defocus compensation system 6. Deformable mirror 7, No. 2 mirror 8, aperture matching system 9, Hartmann sensor 10, computer 11, high-voltage amplifier 12.

[0018] The compensation device of the human eye wavefront aberration measurement and correction system of the present invention is arranged on a beacon light source 1, a focusing system 2, a defocus compensation system 6, and aberrations are controlled and guided according to the Hartmann wavefront sensor 10. In the human eye wavefront aberration measurement and correction system composed of an optical adaptive system that corrects the aberration by t...

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Abstract

The invention relates to a compensation device of a system for detecting and correcting human eye wave-front aberrations, and the compensation device is arranged inside the system for detecting and correcting human eye wave-front aberrations. The compensation device comprises a focusing system that consists of an expanded beam lens, a collimating lens and an electrically-controlled precise translation stage, wherein the collimating lens is fixed at the movable end of the electrically-controlled precise translation stage and also connected with a computer control system. The compensation device further comprises a defocusing compensation system that is arranged between a light splitter and a deformable mirror and consists of a telescopic system and an electrically-controlled precise translation stage, wherein the electrically-controlled precisen translation stage is arranged between two lenses of the telescopic system and connected with the computer control system. Compared with the prior art, the compensation device has the advantages that: the compensation device has good continuity and can correct various defocusing amount without limitations as compared with an insertion-type compensation method; and the compensation device is advantageous in high accuracy, rapidness and accurate displacement as compared with a manual translation stage.

Description

technical field [0001] The invention relates to a medical detection device, in particular to a measurement and correction device for the wavefront aberration of the human eye. Background technique [0002] The eye is the most important way for human beings to obtain external information. Due to the complex and changeable internal structure, the human eye has a large amount of wavefront aberration. Accurate measurement of human eye aberration is of great significance to guide ophthalmologists to perform refractive surgery and improve the imaging quality of human eyes. Individualized ablation requires high precision in surgery to accurately control laser ablation. Therefore, in the "individualized" corneal refractive surgery guided by wavefront aberration, accurate measurement and correction of wavefront aberration is very important. [0003] The human eye wavefront aberration measurement and correction device is a medical device that uses the principle of adaptive optics to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/103G02B27/00
Inventor 谢海明杨雪陈家璧张培茗曹亮周颖庄松林
Owner UNIV OF SHANGHAI FOR SCI & TECH
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