Method and device for determining profile of frame recess

A technology of frames and equipment, applied in the field of glasses

Pending Publication Date: 2022-05-27
CARL ZEISS VISION INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] There is no known method or device capable of determining the overall shape and contour of a groove in a short time, that is to say using only a few image records, with a target accuracy of 0.1 mm

Method used

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  • Method and device for determining profile of frame recess
  • Method and device for determining profile of frame recess
  • Method and device for determining profile of frame recess

Examples

Experimental program
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Embodiment Construction

[0089] Figure 1A and Figure 1B respectively in side view ( Figure 1A ) and floor plans ( Figure 1B ) shows a schematic diagram of an apparatus 10 for contactless determination of the profile of a frame groove in a rim of a spectacle frame 12 according to a preferred embodiment.

[0090] The apparatus 10 includes lighting means 14 in the form of a display according to the illustrated embodiment. For example, the display may comprise a commercially available computer display or may be so designed. Illumination device 14 is designed to provide directional illumination to the rim of eyeglass frame 12 as transmitted light illumination along the entire circumference of rim 12a. In this case, the spectacle frame 12 includes two temples 12a and two temples 12b. According to other embodiments, the apparatus 10 may include other illumination devices and / or light sources designed to provide incident light illumination such that light is incident on the eyeglass frame 12 from the...

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Abstract

The invention relates to a method for determining a shape (34) of a frame recess (12c) in a rim (12a) of a spectacle frame (12). The method comprises illuminating the ring (12a), capturing a plurality of images of the illuminated ring (12a) from different predetermined perspectives, and evaluating the captured images and determining a spatial curve of the frame recess (12c) based on the evaluated images. The method is characterized in that the rim (12a) is illuminated along the entire circumference of the rim (12a) by directional illumination. Furthermore, the method is characterized in that the evaluation of the captured image comprises assigning each part contained in the captured image to a respective surface element (F1,..., F4) of the frame groove (12c) based on at least one of the following characteristics: a shadow of the respective part, a brightness of the respective part and a phase angle of illumination of the respective part. The invention further relates to a device (10), a computer program, a method for grinding an eyeglass lens, and a computer-implemented method for determining the geometry of an eyeglass lens.

Description

technical field [0001] The present invention relates to a method and a device for determining the profile of a frame groove in the rim of a pair of spectacles according to the preamble of the corresponding independent patent claim. The invention also relates to a computer program product and the use of the device for determining vertex power and / or the use of the device for creating a spatially resolved power map. Therefore, the present invention particularly belongs to the technical field of eyeglasses. Background technique [0002] In order to grind spectacle lenses for mounting purposes, i.e. to adapt the spectacle lenses to the dimensions of the rim of the corresponding spectacle frame, the contour of the rim, in particular the contour of the grooves in the rim, must be measured so that the dimensions and curves of the contour can be Use as digital information. The profiles are then used to grind spectacle lenses. Traditionally, grooves or bezels are measured by tacti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/25
CPCG01B11/254B24B9/144G06T7/593G02C13/003G01B11/2545G06T7/11G06T7/97G06V10/44
Inventor J·卡尔斯O·施瓦茨
Owner CARL ZEISS VISION INT GMBH
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