Abstract

A system of two aspheric lenses is described, which efficiently converts a collimated Gaussian beam to a flattop beam. Departing from earlier designs, both aspheric surfaces were convex, simplifying their fabrication; the output beam was designed with a continuous roll-off, allowing control of the far-field diffraction pattern; and diffraction from the entrance and exit apertures was held to a negligible level. The design principles are discussed in detail, and the performance of the as-built optics is compared quantitatively with the theoretical design. Approximately 78% of the incident power is enclosed in a region with 5% rms power variation. The 8-mm-diameter beam propagates approximately 0.5 m without significant change in the intensity profile; when the beam is expanded to 32 mm in diameter, this range increases to several meters.

© 2000 Optical Society of America

Improvement of Galilean refractive beam shaping system for accurately generating near-diffraction-limited flattop beam with arbitrary beam size

Haotong Ma, Zejin Liu, Pengzhi Jiang, Xiaojun Xu, and Shaojun Du
Opt. Express 19(14) 13105-13117 (2011)

Near-diffraction-limited annular flattop beam shaping with dual phase only liquid crystal spatial light modulators

Haotong Ma, Pu Zhou, Xiaolin Wang, Yanxing Ma, Fengjie Xi, Xiaojun Xu, and Zejin Liu
Opt. Express 18(8) 8251-8260 (2010)

Refractive optical systems for irradiance redistribution of collimated radiation: their design and analysis

Patrick W. Rhodes and David L. Shealy
Appl. Opt. 19(20) 3545-3553 (1980)

Design of a single aspheric beam homogenizer for accurate particle sizing application

Jingwen Li, Ruqiang Zhao, Jiefang Bi, and Amin Engarnevis
Appl. Opt. 62(14) 3683-3689 (2023)

1.5% root-mean-square flat-intensity laser beam formed using a binary-amplitude spatial light modulator

Jinyang Liang, Rudolph N. Kohn, Jr., Michael F. Becker, and Daniel J. Heinzen
Appl. Opt. 48(10) 1955-1962 (2009)