Method of detecting the operating condition of an optical element, system for carrying out said method and a laser processing machine provided with such system
A technology for optical components and laser processing, which is applied to the operating conditions of optical components, the machinery of laser processing materials, and the field of improvement in machinery, which can solve problems such as deformation, crack structure of optical components, etc.
Pending Publication Date: 2021-04-20
ADIGE SPA
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Problems solved by technology
For example, collimating lenses for the beam entering the processing head, deflecting mirrors for any beams and focusing lenses may be exposed to high operating temperatures which, depending on the incidence of the processing laser beam, may lead to cracks or structural deformation inside the volume of the optical components
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[0044] The prior art has been described above Figure 1 to Figure 3 It is described, the contents of which are referred to herein because they are conventional implementations of controlled processing machinery for carrying out the method according to the teachings of the present invention.
[0045] Figure 4 A schematic example is shown of a system for detecting the operating conditions of a plurality of optical elements in a processing head of a laser machine according to a preferred embodiment of the present invention. In this figure, the same reference numerals that have been used in the description of the preceding figures are used to refer to Figure 1 to Figure 3 The same or functionally equivalent elements or components are shown.
[0046] Figure 4 The system in shows a laser emitting source 10 adapted to emit a laser beam in a transmission mechanism, such as an optical fiber 12d, which is adapted to direct the laser beam emitted by the emission source towards the ...
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A method and a system are described for detecting the operating condition of at least one optical element (16) arranged along an optical propagation path of a power laser beam (B) in a processing head (14) of a machine for laser processing of a material, based on the steps of : a) acquiring a signal indicative of an optical radiation which back-propagates coaxially to the optical path at the wavelength of the laser beam (B); b) acquiring a signal indicative of an optical radiation which back-propagates coaxially to the optical path; c) acquiring a signal indicative of an optical radiation emitted by the optical element (16); d) acquiring a signal or data which is a function of the time-of-flight of an acoustic wave launched through the volume of the optical element (16); e) calculating a normalized signal of optical radiation in the infrared; f) calculating a real infrared optical radiation signal; and g) calculating a signal indicative of the operating condition of the optical element (16) according to the real infrared optical radiation signal, the signal indicative of an optical radiation which back-propagates coaxially to the optical path and the signal indicative of an optical radiation which back-propagates coaxially to the optical path at the wavelength of the laser beam (B).
Description
technical field [0001] The present invention relates to laser treatment of materials, preferably metallic materials, and in particular to improvements in machines for laser treatment of materials, in particular laser cutting, drilling or welding of said materials. [0002] More specifically, the invention relates to detection along the propagation path of a laser beam in machines for processing materials, in particular laser cutting, drilling or welding of said materials, according to the preambles of claims 1 and 15 respectively Methods and systems for operating conditions of arranged optical elements. [0003] According to another aspect, the invention also relates to a machine for laser treatment of materials comprising a system for detecting the operating condition of at least one optical element for shaping the beam path of the laser beam. Background technique [0004] In the following summary and claims, the term "material" and in the preferred embodiment "metallic ma...
Claims
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IPC IPC(8): B23K26/00B23K26/70
CPCB23K26/03B23K26/048B23K26/062B23K26/0643B23K26/382B23K26/21B23K26/707B23K26/705G01M11/02B23K26/38B23K26/70
Inventor 毛里齐奥·斯贝蒂达维德·甘多尔菲马蒂亚·瓦宁
Owner ADIGE SPA