Automatic calibrating device of optometry lens box and calibrating method

Abstract

The invention discloses an automatic calibrating device of an optometry lens box. The automatic calibrating device comprises a lens meter, a three-axis manipulator, a bracket, two linear laser markingmachines, two video cameras, a buzzer, a lower computer and a supervisory computer with automatic calibration software, wherein the lens meter, the three-axis manipulator and the bracket are fixed ona table top; the two linear laser marking machines and the two video cameras are fixed on the bracket; the lens meter is used for displaying collected measuring information of lenses on a screen; thehand part of the manipulator is an electric clamping jaw with two claws, and can clamp lenses put on the surface of a lens supporting seat and perform moving or rotating; the laser marking machines are used for marking a geometric center position of the lens supporting seat on the lens; camera lenses of the two video cameras are aligned to a screen of the lens meter and the lens supporting seat;the collected measuring information of the lens meter and lens image information are transmitted to the supervisory computer through the lower computer; the buzzer is used for sending different buzzers when the calibration is completed and manually completing the operation of calibration is needed; and the supervisory computer is used for operating the software and controlling the lower computer to complete the automatic calibration process. Through the adoption of the automatic calibrating device disclosed by the invention, the automation of calibration is realized, and the calibration resultis accurate and reliable.

Description

technical field [0001] The invention relates to an automatic calibration device and a calibration method for an ophthalmic measuring instrument, in particular to an automatic calibration device and a calibration method for an optometry lens box. Background technique [0002] Optometry lens box is a combination of various types of optometry lenses (lenses embedded in frames for measuring the refractive error of the human eye). An ophthalmic measuring instrument for other visual functions of the eye. In order to ensure the accuracy and reliability of the measurement performance of the trial lens box, it is necessary to calibrate it regularly according to the verification regulations of JJG 579-2010 "Optometry Lens Box". [0003] Optometry lens boxes are generally calibrated with a lens meter based on the autofocus principle. The commonly used structural principle of this kind of lens meter is: the light emitted by the light source becomes parallel light after passing through...

AI Technical Summary

Problems solved by technology

[0006] 1. The clamping mechanism in the above two inventions can only determine the geometric center position of the lens under test, but cannot determine the optical center position of the lens under test, that is, it is impossible to align the optical center of the lens under test with the beam center of the light source assembly. just;

[0007] 2. The clamping mechanism in the above two inventions cannot automatically rotate the lens, so it cannot automatically measure the axial position of the cylindrical test lens and the baseline of the prism test lens according to the verification regulations of JJG579-2010 "Optometry Lens Box"

[0009] 1. The invention cannot guarantee the fit of the tested lens and the lens holder during the measurement process, which will cause measurement errors;

[0010] 2. The invention cannot automatically rotate the lens, so it cannot automatically measure the axial position of the cylindrical test lens and the baseline of the prism test lens according to the verification regulations of JJG 579-2010 "Optometry Lens Box"

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