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Process for machining lens

A kind of process and lens technology, which is applied in the process field of cutting blanks on the surface to produce lenses, can solve the problems of large mechanical stress and achieve the effect of reliable retention

Active Publication Date: 2016-08-17
美意有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] In particular, applicants have found that mechanical stress is greater during the rough cutting step relative to the finishing and polishing steps

Method used

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  • Process for machining lens
  • Process for machining lens
  • Process for machining lens

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Embodiment Construction

[0054] In the following description, for the purpose of explaining the drawings, the same reference numerals will be used to denote structural elements having the same functions. With reference to the accompanying drawings, a holding group for semi-finished products for realizing the process of machining lenses according to the invention is shown and is generally designated 10 .

[0055] Going into detail of the example embodiment shown, semi-finished product 20 is a semi-finished piece of material that will become a lens.

[0056] This semi-finished product 20 comprises a machined first surface 20a, referred to as front or convex surface, and at least one second surface, such as a rear surface 20b opposite the front surface 20a, and / or a peripheral side surface 20c.

[0057] The rear surface 20b will generally be surface finished.

[0058] The holding group 10 comprises a suction holding device 10a. Such a device preferably comprises a first rotational or rear spindle 11 te...

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PUM

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Abstract

The present invention refers to a process for machining a lens, comprising the steps of holding a semi-finished product (20) through a suction holding force which is active during an entire surface machining cycle of the semi-finished product (20); carrying out the surface machining cycle on a surface (20b) to be machined of the semi-finished product (20); and activating a pressure holding force depending on the level of the mechanical stresses exerted on the semi-finished product (20) during the surface machining cycle on said surface (20b).

Description

technical field [0001] The present invention relates to a process for machining a lens, in particular, but not limited to, a process for surface cutting a blank to produce a lens. Background technique [0002] The lens consists of a light-transmitting layer, which may or may not be tinted, resulting in two fully polished optical surfaces at the front and rear end faces. Such surfaces may have any shape ranging from perfectly spherical to more complex structures, depending on the particular optical effect one wishes to achieve. [0003] In lens processing, in addition to the manufacturing accuracy of individual surfaces, it is also necessary to have these surfaces perfectly aligned with each other both axially and angularly. Otherwise, the lens cannot provide the optics it was designed for. [0004] The device for manufacturing lenses is capable of obtaining lenses with specific predetermined optical properties from raw or semi-finished blocks of material, ie only finished ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D11/00B24B9/20B24B13/005
CPCB29D11/00932B24B13/005B24B9/146B24B9/14
Inventor 斯特凡诺·松佐尼
Owner 美意有限公司