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Mould processing method for Fresnel lens, used tool, worked mould and lens

A technology of Fresnel lens and processing method, which is applied in the direction of lens, household utensils, manufacturing tools, etc., and can solve the problems of blades, shortened tool life, debris, etc.

Inactive Publication Date: 2004-12-29
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the tip of the conventional turning tool is very sharp, chipping is generated and the tool life is shortened

Method used

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  • Mould processing method for Fresnel lens, used tool, worked mould and lens
  • Mould processing method for Fresnel lens, used tool, worked mould and lens
  • Mould processing method for Fresnel lens, used tool, worked mould and lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Figure 1-Figure 3 shows the tools of the example, Figure 4 It shows the scene of cutting the base plate of the mold with this tool and processing the mold for Fresnel forming.

[0020] First, let's start with the tools, figure 1 The tool is constituted by a so-called turning tool 1 used as a lathe, which has a handle 2 and a blade 3. Knife handle 2 is that the main body 2a made by integrating the main body 2a made of high rigidity materials such as carbon steel and the blade mounting part 2b made of tungsten can be installed on the tool handle (not shown) on the lathe with turning tool 1 Shown) integrated structure, it is also possible to install and detach freely to the handle with bolts and other connecting methods.

[0021] The blade 3 is made of diamond, and is joined to the bit mounting portion 2b of the handle 2 by a well-known joining method such as crimping. The blade 3 has a tip 4 and a pair of ridges 5 and 6 following the tip 4, and the ridge 5 at one en...

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PUM

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Abstract

A method for working a die for use with a Fresnel lens, the method being intended to work in an original die plate having a Fresnel molding groove with wall surfaces corresponding to a lens surface and a non-lens surface of the Fresnel lens. A cutting tool having one piece of edge line continuing to a blade end is constructed as a cutting edge. The blade end has formed therein a notched portion which connects the one piece of edge line and another piece of edge line. Thereby, while a relative rotating movement around a center line of the die is made between the cutting tool and the original die plate, the cutting tool is fed into the original die plate with the cutting edge being used as the leading blade.

Description

technical field [0001] The invention relates to a mold processing method for a Fresnel lens, a tool used in the processing method, a mold processed by the processing method, and a Fresnel lens. Background technique [0002] The Fresnel lens is formed by repeating the lens surface with a small width in the radial direction around the optical axis of the entire lens. Such lenses are manufactured using molds. On the mold, there are a plurality of Fresnel forming grooves for forming each mirror surface and a non-mirror surface between the mirror surfaces by cutting, a master mold formed by the master mold, and a raw mold formed by the master mold. mold. The master mold is formed by duplicating the Fresnel molding surface on the surface of the master mold forming a plurality of Fresnel molding grooves, and the master mold is formed by duplicating the Fresnel molding surface replicated on the master mold surface again. Therefore, the shape of the Fresnel forming surface on the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C33/42B29D11/00G02B3/08
CPCB29L2011/005B23B27/20B29C33/42G02B3/08B29D11/00269B23B2200/28Y10T82/10B29D11/00
Inventor 河野义浩
Owner DAI NIPPON PRINTING CO LTD