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Optical device for machining using laser beam, method for machining using laser beam, and method for manufacturing glass article

Mamada Haruhiko, +2 more
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TLDR
In this article, a first lens group (21), an axicon lens (10), and a second lens group(22) are used to detect a laser beam incident on the first lens.
Abstract: 
This optical device (1a) is provided with a first lens group (21), an axicon lens (10), and a second lens group (22). A laser beam is incident on the first lens group (21). The laser beam that passes through the first lens group (21) is incident on the axicon lens (10). The laser beam that passes through the axicon lens (10) is incident on the second lens group (22). The first lens group (21) forms a first Bessel beam (A) and a first ring beam (B), and forms a focal surface (f) at which the ring width of the first ring beam (B) is the smallest. The second lens group (22) forms a second ring beam (C) the ring width of which is substantially constant along an optical axis, and forms a second Bessel beam (D).

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Analytical description method of annular structured light

Lou Yuli, +5 more
TL;DR: In this article, the authors proposed an analytical description method of annular structured light, which comprises the steps: enabling laser to pass through an axicon-lens light beam transformation system to obtain annular light, obtaining geometric optical parameters of the axicon and the light beam transform system, and finally obtaining the intensity distribution of the light.
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High speed laser processing of transparent materials

Manoj Kumar Bhuyan, +4 more
TL;DR: In this paper, a method and system for laser pre-cutting a layered material (31) with a laser beam (14) is disclosed, which may include setting an optical beam path (8) and a laser characteristic of the laser beam(14) such that an interaction of the beam with the layered material generates an elongate damage region (57) in the layered materials (31), and, for each of a series of pre-cut positions (X N-1, X N, X n+1 ) of the layeredmaterial (31).