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Lens diopter Moire measuring device and measuring method

A technology of measuring device and measuring method, which is applied in the direction of testing optical properties, etc., can solve problems such as insufficient, no unified testing standards and measuring methods, and achieve the effects of simple operation and maintenance, low requirements for working environment, and low price

Inactive Publication Date: 2015-09-09
SICHUAN CCO DISPLAY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for such lenses, measuring only a few points or generatrices is not enough to evaluate the entire lens
For progressive multi-focal lenses, domestic research work is less, and many countries abroad have done a lot of scientific research in this area, but up to now, there is still no unified testing standard and measurement method in the world

Method used

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  • Lens diopter Moire measuring device and measuring method
  • Lens diopter Moire measuring device and measuring method
  • Lens diopter Moire measuring device and measuring method

Examples

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Embodiment Construction

[0021] The specific embodiment of the present invention is described in detail as follows in conjunction with accompanying drawing:

[0022] like figure 1 As shown, the lens diopter moiré measurement device of the present invention includes a light source 1, a beam expander lens 2, a diopter compensation lens 3, a first grating 5, a second grating 6, a fringe receiving unit 7, a fringe acquisition unit 8 and a fringe analysis unit 9 , the light source 1 is obtained by coupling output of a semiconductor laser through an optical fiber, and the monochromatic visible light source is used as the light source for lens measurement; the beam expander lens 2 is a double cemented achromatic lens, and the point light source is placed at the focal point of the beam expander lens, and the point light source passes through the beam expander lens The collimated light beam is produced afterward; the compensation lens 3 is a plano-convex lens with a single focal length; the measured lens is pl...

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Abstract

The invention discloses a lens diopter Moire measuring device and a measuring method based on the device. The measuring device comprises a light source, a beam expanding lens, a diopter compensating lens, a first optical grating, a second optical grating, a strip receiving unit, a strip collecting unit and a strip analyzing unit. The measuring method comprises steps of measuring device adjustment, image acquisition and image processing. In the measuring device, a semiconductor laser with a larger divergence angle outputs the light source in a manner of optical coupling, thereby improving quality of optical beams. The measuring device is simple in structure, lower in cost, firmer and simpler to operate and maintain, and requires less on working environment. In the measuring method, the lens diopter compensating mechanism is added in front of a to-be-measured lens, so while the identification precision of Moire strips is ensured, diopter measuring range of the measuring device is extended.

Description

technical field [0001] The invention belongs to the field of consumer application electronics, and in particular relates to a lens diopter moiré measurement device and a measurement method. Background technique [0002] As a non-contact optical measurement technology that combines Moiré effect and Talbot effect, Moiré measurement has the advantages of full field of view and non-contact, and is used in many aspects of industrial and civil fields. got applied. [0003] For the measurement of traditional single-light, double-light and three-light lenses, two kinds of focal power meters (also known as refractometers, film inspection instruments, lens measuring instruments, etc.) are generally used at home and abroad: focusing imaging focal power meter and automatic Focimeter. This type of instrument can only analyze a small area of ​​the lens, and measure the optical properties such as the diopter of the lens represented by the center of the area. Since single vision, bifocal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02
Inventor 田朝勇
Owner SICHUAN CCO DISPLAY TECH
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