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Fig. 2. (Color online) The microphotographs of focused laser lights with the wavelength of (a) 532 nm and (b) 1,064 nm by using an apochromatic lens and a Focal-π shaper with an apochromatic lens respectively. (c) After laser heating on stainless steel with a 1,064 nm laser.
New Phys.: Sae Mulli 2021;71:938~948