Abstract
The scanning path plays a very important and novel breakthrough in preparing optical anti-reflectance micro-nano structures on the surface of NiTi alloy. Compared with simple grids and grating structures, circular structures are more likely to form closed structures under high heat accumulation nanosecond laser processing conditions. These relatively closed circular structures will further help reduce optical reflection performance. In this study, some designed surface micro-nano structures are prepared by nanosecond laser circular scanning, which are the scanning pitch (plan A), the scanning angle (plan B), and the multi-pass scanning (plan C), respectively. The influence of the different micro-nano structures, surface roughness and elemental content on the surface optical anti-reflectance are also investigated. The results indicate that the best optical anti-reflectance micro-nano structures is obtained by 10-pass scanning among plan C. and which is 5% during the measurement wavelength of 400 nm ∼ 800 nm. At the same time, the mechanism is also discussed for changes in the light trapping effect of the laser textured surfaces.
Published Version
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