A method and device for detecting ophthalmic lenses based on wavefront analysis

Abstract

The invention discloses a method for detecting spectacle lenses based on wavefront analysis. The method comprises a light source adjustment unit, a lens posture adjustment unit, a detection unit and asoftware module, wherein the light source adjustment unit is used to translate and rotate incident light; the lens posture adjustment unit is used to adjust initial vertex distances of lenses, a wearing view angle and facial radians of rings according to wearing parameters of a prescription for spectacles; the detection unit is used to detect an effective wavefront aberration of the lenses; the software module is used to set motion parameters of a motion platform and set detection parameters of a wavefront aberration sensor in the detection unit, and is used to receive, calculate and displayeffective wavefront aberration data of the detection unit. The method measures the effective wavefront aberration in high precision in a lens wearing state, and provides quantitative reference for designing and processing of the lenses and evaluation of optical properties and imaging quality.

Description

technical field [0001] The invention relates to precision instruments, in particular to a method and device for detecting spectacle lenses based on wavefront analysis. Background technique [0002] The human eyeball is a precise optical system, but due to the limitation of physiological factors, it has various imaging defects, such as the vision loss of the emmetropic eye in dark light environment, and the myopia in youth becomes worse with age. As presbyopia, the phenomenon of not being able to see clearly at both distance and near, cataracts and lens opacity prevent light from reaching the retina, etc. Various means of vision correction have thus appeared, such as wearable spectacle lenses, contact (contact) lenses, laser keratomileus, built-in intraocular lenses, etc., to compensate or eliminate the imaging defects of the eyeball itself. Among them, wearable frame glasses have the advantages of low price, low risk, and convenient wearing, and are the most common means of...

AI Technical Summary

Problems solved by technology

Although these studies have considered the measurement of the lens in the wearing state to a certain extent, the methods and detection devices proposed in these studies are open to discussion, and they are not accurate measurements of the effective wavefront.

For example, in the existing research, the wavefront aberration of the rear surface of the lens is still measured, and the test of the lens does not consider the influence of the change of the vertex distance, the wearing angle of view, and the curvature of the face of the lens ring on the measurement results.

In the above studies, the relative movement principle is used to translate or rotate the lens instead of the rotation of the eyeball or the incident light source. This kind of relative movement conversion without accurate consideration of the position of the rotation center causes the change of the vertex distance and the change of the vertex distance in the wearing state. do not match, there is a certain positioning error, which causes the error of the effective wavefront aberration detection

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