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Corneal contact lens comprehensive detector and focusing evaluating algorithm thereof

A contact lens and focusing evaluation technology, which is applied in the direction of instruments, glasses/safety glasses, glasses/goggles, etc., can solve the problems of easy fatigue of operators, measurement results affected by human factors, reduction of measurement accuracy and work efficiency, etc. Achieve the effects of reducing calculation time, realizing digitization and intelligence, and simplifying the detection process

Active Publication Date: 2014-05-14
AUTEK CHINA
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Problems solved by technology

The measurement results are greatly affected by human factors, and the operator is prone to fatigue, which greatly reduces the measurement accuracy and work efficiency

Method used

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  • Corneal contact lens comprehensive detector and focusing evaluating algorithm thereof

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Embodiment 1

[0035] Such as figure 1 A comprehensive testing instrument for contact lenses shown includes an eyepiece 1 , an objective lens 3 , a stage 5 , and a dial indicator 11 . Specifically, the eyepiece 1 is an electronic eyepiece, a collimating light pipe 2 is arranged between the eyepiece 1 and the objective lens 3, the dial indicator 11 is a digital dial indicator, and a lifting device is fixed under the stage 5, and a lifting device is provided on the lifting device. Dark field lighting 9. Specifically, the collimator light pipe 2 includes an LED light source, a reticle, a focusing lens and a prism connected in sequence. Directly below the objective lens 3 is provided with an LED dark field lighting device. The electronic eyepiece 1 adopts a CMOS image sensor. The digital dial indicator 11 is in contact with the stage 5 through the probe, and the output signal end is connected with the controller 14 through the control line. A positioning device for positioning the detection ...

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Abstract

The invention relates to a corneal contact lens comprehensive detector and a focusing evaluating algorithm of the corneal contact lens comprehensive detector. The corneal contact lens comprehensive detector comprises an optical imaging device, an electronic ocular, an objective table, a lifting device, a digital dial indicator, a singlechip and a tablet personal computer and corresponding measuring control software, wherein a collimation light pipe is arranged between the ocular and an objective lens; an LED (light-emitting diode) oblique incidence lighting device and a dark filed lighting device are also respectively arranged above and below the objective table; a digital dial indicator probe is contacted with the objective table, and a digital signal is output to a controller; the lifting device comprises a vertical arm fixed on a base, guide rails and a stepping motor arranged on the vertical arm, and a gear and rack transmission device which realizes the variable speed lifting by switching an electromagnetic clutch, and the stepping motor and the electromagnetic clutch are controlled by a controller. The corneal contact lens comprehensive detector and the focusing evaluating algorithm of the corneal contact lens comprehensive detector provided by the invention have the advantages that a lens surface quality detection function and a lens diameter measuring function are also integrated, the intelligent measurement of a lens is realized, and the detection efficiency and measurement accuracy are improved.

Description

technical field [0001] The invention relates to a corneal contact lens comprehensive detector and a focusing evaluation algorithm thereof. Background technique [0002] During the fitting and production process of contact lenses, it is necessary to accurately measure and inspect the base arc radius of curvature, lens diameter and surface quality of the lens. At present, the base arc meter, diameter ruler and stereo microscope are used for detection respectively. Each time, the lens needs to be loaded and unloaded, positioned and focused again. The operation process is complicated and the detection efficiency is low. The radius of curvature of the base arc of the lens must ensure that the detection error is less than 0.02mm. At present, manual adjustment and naked eye observation are required to judge the clarity of the lens and read the dial indicator data. The measurement results are greatly affected by human factors, and the operator is prone to fatigue, which greatly red...

Claims

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Application Information

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IPC IPC(8): G02C13/00G01M11/02
Inventor 王小立
Owner AUTEK CHINA
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