Optical system design of sheet-beam energy homogenization with long focal-depth based on aberration effect of aspheric lens

Zhen Yang; Yingjie Song; Xiangyan Yu; Yong Zhang; Jianlong Zhang

doi:10.1117/12.2624389

27 March 2022 Optical system design of sheet-beam energy homogenization with long focal-depth based on aberration effect of aspheric lens

Zhen Yang, Yingjie Song, Xiangyan Yu, Yong Zhang, Jianlong Zhang

Author Affiliations +

Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 121695I (2022) https://doi.org/10.1117/12.2624389
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China

Abstract

Planar laser-induced fluorescence (PLIF) has been widely used in the two-dimensional (2D) accurate measurements of important combustion parameters such as temperature, species concentration and flame structure due to its high spatiotemporal resolution and non-contact diagnosis. Since the sheet-forming optics is an important part of PLIF system, the accuracy and precision of PLIF measurement strongly depend on the uniformity and focal-depth of the shaped sheetbeam. However, the current sheet-beam shaping methods cannot meet the practical requirements of high uniformity and long focal-depth at the same time. To improve the measurement accuracy and precision of PLIF technology, a new sheetforming homogenization optical system with long focal-depth is proposed and designed based on aspherical aberration effect. By redistributing the central energy of Gaussian beam to the edges of the shaped sheet-beam, the sheet-beam shaping with high uniformity is realized. The working wavelength of the system is 283.553 nm, the working distance is 504 mm, and the total length of the system is 360 mm. The design results show that the size of the shaped sheet-beam is 100 mm × 0.5 mm with the effective focal depth of ±15 mm, the maximum beam uniformity >89% and the energy transmission efficiency >95%, which can better meet the actual requirements of PLIF measurement.

Citation Download Citation

Zhen Yang, Yingjie Song, Xiangyan Yu, Yong Zhang, and Jianlong Zhang "Optical system design of sheet-beam energy homogenization with long focal-depth based on aberration effect of aspheric lens", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 121695I (27 March 2022); https://doi.org/10.1117/12.2624389

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KEYWORDS

Homogenization

Optical design

Aspheric lenses

Gaussian beams

Beam shaping

Spherical lenses

Combustion

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