JPS6426723U

JPS6426723U -

Info

Publication number: JPS6426723U
Application number: JP12237087U
Authority: JP
Priority date: 1987-08-10
Filing date: 1987-08-10
Publication date: 1989-02-15

Description

[Brief explanation of the drawing]

第１図は本考案による環状集光装置を示す断面
説明図、第２図および第３図は本考案に用いる環
状集光レンズの形状を説明する図で、第２図ａは
基本となるレンズを示す図、第２図ｂは第２図ａ
に示すものの分割面Ａを示す図、第２図ｃは第２
図ｂに示すものの分割面Ｂを示す図、第２図ｄは
第２図ｂに示すものの分割面Ｃを示す図、第３図
ａは第２図ｃに示したものを接合した状態を示す
図、第３図ｂは第２図ｃと第２図ｄに示したもの
とを接合した状態を示す図、第４図ａ，ｂは第３
図ｂに示した環状集光レンズを用いて、コニカル
レンズと環状集光レンズとの距離を２段階に変化
させた状態を示す説明図、第５図ａ，ｂ，ｃは本
考案による環状集光装置を用いた被加工物の加工
状態を示す説明図、第６図は従来のレンズの組み
合わせを示す図である。１……導光管、２，２０……コニカルレンズ、
３……環状集光レンズ、４……チヤンバー、５…
…外筒、６，７……保持部材、８……アシストガ
ス導入口、９……被加工物、１０……充填材、１
１，１２……環状焦点、１２……凸レンズ、Ｌ…
…円柱状の平行光束、Ｌ_１……直円錐状光束、Ｌ
_２……環状光束、Ａ……断面、Ｂ，Ｃ……分割面
、Ｄ，Ｅ……複合面、ｌ……第１の直線、ｍ……
第２の直線、ｌ_１，ｍ_１……辺、Ｏ′……回転中
心、２１……集光レンズ。 Fig. 1 is a cross-sectional explanatory diagram showing the annular condensing device according to the present invention, Figs. 2 and 3 are diagrams explaining the shape of the annular condensing lens used in the present invention, and Fig. 2 a shows the basic lens. Figure 2b is the same as Figure 2a.
Figure 2c shows the dividing plane A of the one shown in Figure 2c.
Figure 2 d shows the dividing plane B of the item shown in Figure 2 b, Figure 2 d shows the dividing plane C of the item shown in Figure 2 b, and Figure 3 a shows the joined state of the item shown in Figure 2 c. Fig. 3b is a diagram showing the state in which the parts shown in Figs. 2c and 2d are joined, and Figs.
An explanatory diagram showing the state in which the distance between the conical lens and the annular condensing lens is changed in two stages using the annular condensing lens shown in Fig. FIG. 6 is an explanatory diagram showing a processing state of a workpiece using an optical device, and FIG. 6 is a diagram showing a conventional combination of lenses. 1... Light guide tube, 2, 20... Conical lens,
3... annular condensing lens, 4... chamber, 5...
... Outer cylinder, 6, 7 ... Holding member, 8 ... Assist gas inlet, 9 ... Workpiece, 10 ... Filler, 1
1, 12... annular focal point, 12... convex lens, L...
...Cylindrical parallel light beam, L ₁ ...Right circular conical light beam, L
₂ ...Annular light flux, A...cross section, B, C...dividing plane, D, E...composite surface, l...first straight line, m...
Second straight line, l ₁ , m ₁ ... side, O' ... center of rotation, 21 ... condenser lens.

Claims

[Claims for Utility Model Registration] (1) A conical lens 2 is attached to the tip of a light guide tube 1 connected to an oscillator that oscillates a cylindrical parallel light beam L.
is disposed so that its optical axis center coincides with the optical axis center of the parallel light beam L, and an annular condenser lens 3 having a plurality of annular focal points 11 is arranged so that its optical axis center coincides with the optical axis center of the conical lens 2. The annular condenser is arranged so as to be able to approach and separate from the conical lens 2 with its center coincident with the conical lens 2, and the parallel light beam L passes through the conical lens 2 and enters the annular condenser lens 3. light device. (2) The annular condensing lens 3 having the plurality of annular focal points 11 obtains a cross section A by cutting the basic convex lens 12 along a plane passing through its optical axis, and in this cross section A, A dividing plane B surrounded by a first straight line l and a second straight line m parallel to the optical axis and opposite to the first straight line l with respect to the optical axis. Assuming a composite surface D in which the sides formed by a plurality of dividing planes B and the first straight line l and the second straight line m are joined in the same plane, the composite plane is parallel to the optical axis and The annular light condensing device according to claim 1, which is a rotating body obtained by rotating the composite surface D around a center line O' assumed on the outside including the end sides of D.