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PRODUCT UPDATE CONTROL AND GUIDANCE OPTICS


ZnSe focusing lenses for CO2 cutting lasers


Five-axis laser launched


Aerotech has launched the AGV5D, a five- axis laser micromachining scanner. The scanner is suited for the high-


precision production of complex components in medical technology, microelectronics and the automotive industry. It also offers simple integration into a machine, system or subsystem. Almost all geometries can be produced


with precisely defined cross sections using the scanner. The AGV5D can simultaneously scan and move the laser beam on five axes: spot placement in the field of view (2-DOF), depth of field (1- DOF), and precession angle (2-DOF). The five-axis scanner is controlled via the new Aerotech control platform Automation1, which can also take over workpiece positioning and laser control. The result is highly precise, complex components. The laser scanner can be operated with a large number of commercial femtosecond lasers, such as those used in micromachining, for example in medical technology. www.aerotech.co.uk


Electro-optic modulators for ultrafast lasers


II‐VI has introduced new electro-optic modulators, based on proprietary crystal technology, that are suited for ultrafast lasers in materials processing. The modulators enable ultrafast lasers to


generate a series of highly controlled energy pulses at rapid intervals to achieve precision machining tasks, such as scribing, drilling, and marking at a very high speed. They are differentiated by their high contrast ratio of greater than a thousand to one, enabling ultrafast lasers to deliver a rapid stream of pulsed energy to the workpiece with a high degree of control. II-VI leverages its electro-optic, acousto- optic and magneto-optic materials and technology platforms, to enable a wide range of ultrafast laser designs. The firm’s portfolio of components for ultrafast lasers includes seed lasers, wavelength-stabilised pump laser modules, matched chirped mirror pairs, dispersion-compensation prism pairs, and polarisation-mode combiners. www.ii-vi.com


26 LASER SYSTEMS EUROPE SPRING 2020


Laser Research Optics has introduced a new line of ZnSe laser focusing lenses that come in various focal lengths for CO2 cutting lasers between 200W and 4kW that are used to process heavy steel plate. The lenses feature focal lengths from


3-inch to 10-inch in 0.5-inch increments. They are offered with a proprietary ‘Cool- Cut’ coating that absorbs less than 0.15 per cent of laser energy to protect against heat damage, or with standard A/R coatings that provide less than 0.2 per cent total absorption. Optimised for 10.6μm, the ZnSe focusing


lenses are offered in 1-inch to 2-inch OD sizes, with thicknesses ranging from 0.250- inch to 0.380-inch and come in plano-convex and -meniscus configurations. They can be supplied plain or mounted. www.laserresearch.net


F-theta lenses for laser processing


Jenoptik has expanded its fused silica lens portfolio for high-power laser applications. The lenses feature low-absorption fused- silica, an optimised coating and improved reflex positions, enabling them to be used with ultrashort laser pulses. For example, the firm’s new F-theta


lens for 355nm applications is well suited to high-volume series production in microtechnology, microsystems technology, and consumer electronics. This short-focus lens enables a small spot diameter in a scan field of 22mm. Depending on the application, spot sizes up to 4.5μm can be realised. Another F-theta lens has been designed for 515 to 540nm applications, for


PROCESS MONITORING MM-L300A Laser Weld Monitor


Amada Miyachi Europe has announced the availability of its new MM-L300A Laser Weld Monitor. This compact, lightweight (3kg) device is designed to detect welding defects and errors such as gaps between parts, missing parts, weld depth over-penetration, incorrect focus points and cover gas absence. It provides operators feedback on resultant laser weld quality, and supports laser welding technologies for both spot and seam welds. The MM-L300A indicates weld quality by


detecting and recording a thermal signal from the area of laser interaction and converting this into a graphical waveform. Part of the intelligence of this third-generation process monitor is that, not only can absolute maximum/minimum limits be set, but value envelopes can also be drawn around the waveform. Once the limits are determined, the


unit compares a new weld waveform in real time, to identify a good or bad weld. Providing high temporal resolution – down


to 1 microsecond – the MM-L300A, with the SU-N300A dedicated thermal sensor, enables precision monitoring of both continuous wave and pulsed laser processes. www.amadamiyachi.eu


@LASERSYSTEMSMAG | WWW.LASERSYSTEMSEUROPE.COM


manufacturing methods using high-energy fibre lasers and disk lasers with a high beam quality. In this wavelength range, the lens can also be used specifically to process copper and brass, for example for processing electronic components and circuit boards, or for additive manufacturing. With a focal length of 115mm, workpieces can be processed in a scan field of up to 71mm. Jenoptik has also released a lens for


applications in the wavelength range of 1,030 to 1,080nm. The new optic is designed for marking, structuring, and engraving plastics and metals, and for structuring solar cells. It has a large scan field of 254 x 254mm and a focal length of 347mm. www.jenoptik.com


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