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auto focus meter

A focal meter and automatic technology, applied in the field of focal meter, can solve the problems of lens support deformation, easy deformation under pressure, inaccurate measurement results, etc., and achieve the effect of improving accuracy and increasing strength

Active Publication Date: 2018-08-24
SHANGHAI CHANGE OPTICAL EQUIP & INSTR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing lens holders are made of rubber material as a whole, which is easy to be deformed under pressure during long-term use, and if the pressure of the tablet pressing mechanism is too large, the rubber lens holder will be deformed by compression, which will lead to Inaccurate measurements

Method used

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Embodiment Construction

[0025] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific diagrams.

[0026] refer to figure 1 , figure 2 and image 3 , automatic focal meter, including frame, measurement parts, display parts, printing parts, etc.

[0027] The measuring part is fixed on the frame, and the measuring part includes a lens meter body capable of measuring the vertex power and prism power of the spectacle lens. The lens meter body is provided with a transmitter 2 for generating a light beam for measurement. A lens support 3 for carrying spectacle lenses. The lens support 3 has a light hole, and an optical signal receiving and processing device 1 is arranged below the hole. The measuring beam emitted by the transmitter 2 can pass through the light hole and enter the optical signal receiving and processing device 1. The lens support 3 in...

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Abstract

An automatic lensmeter relates to the field of lensmeters and comprises a machine frame and a measuring component. The measuring component is fixed on the machine frame and comprises a lensmeter body. The lensmeter body is provided with an emitting head, the emitting head faces a lens support, a light transmitting hole is formed in the lens support, a light signal receiving and processing device is arranged under the light transmitting hole, and a measuring light beam emitted by the emitting head can penetrate through the light transmitting hole to enter the light signal receiving and processing device. The lens support comprises a lens support main body made of elastic materials and a reinforcing mechanism made of hard materials. The light transmitting hole is formed in the lens support main body, the reinforcing mechanism is embedded into the lens support main body, the reinforcing mechanism is in a tubular shape, and the central axis of the reinforcing mechanism in the tubular shape coincides with the central axis of the light transmitting hole. By means of the reinforcing mechanism, the strength of the automatic lensmeter is effectively improved, the deformation caused by long-term use or overlarge pressure of a pressure mechanism is reduced, and the accuracy of measurement results is improved.

Description

technical field [0001] The present invention relates to optical instruments, in particular to a focal meter. Background technique [0002] The lens meter is mostly an optical instrument for lens inspection, which can be used to measure the vertex power and prism power of eyeglass lenses, determine the optical center, axial position and printing marks of the lens, and check whether the lens is correctly installed in the frame, etc. [0003] Generally, for the convenience of measurement, the lens meter is provided with a lens support with a light hole, and the lens support is used to place the spectacle lens or contact lens to be tested. The lens meter is also provided with a pressing mechanism for pressing the measured spectacle lens or contact lens placed on the lens holder. However, most of the existing lens holders are made of rubber material as a whole, which is easy to be deformed under pressure during long-term use, and if the pressure of the tablet pressing mechanism ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02
Inventor 徐道平张道发吴义清
Owner SHANGHAI CHANGE OPTICAL EQUIP & INSTR TECH