Reduction of small-scale intensity modulation in a line focus produced by a cylindrical-lens array using polarization control and wedge angles

Löwenthal, F.; Präg, A. R.; Balmer, J. E.

doi:10.1016/s0030-4018(96)00595-0

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…Up to now, a number of the technologies and approaches for the uniform irradiation have been developed [1][2][3][4][5][6][7][8] , the array optical system is one kind of the most important techniques. The orthogonal cylindrical lens arrays (OCLA) can achieve obvious improvement of irradiation uniformity on the target, which is insensitive to non-uniformity of the incident laser beam, furthermore, it could not be influenced by the laser's near field distribution 5 .…”

Section: Introductionmentioning

confidence: 99%

Improved two-dimensional orthogonal cylindrical lens arrays optical system with controllable focus profile for uniform irradiation

Jian-zhou

Dong

et al. 2009

4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technolo

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A novel orthogonal cylindrical lens arrays (OCLA) system has been proposed to obtain two-dimensional (2D) uniform irradiation with controllable focus width and transformation of beam-shape at the same time. The system is composed of two pairs of mutual OCLA and aspheric lens. Based on adaxial matrix optics and scalar quantity diffraction integral theory, the principle of this system with controllable focus profile is analyzed and optimum design of system parameter are presented in detail respectively. The simulated results show that by a suitable choice of system parameters two-dimensional uniform focusing of laser beams with controllable focus width from several hundred microns to several millimeters can be achieved. And the system converts a circular laser beam into a flat-top square focal spot of steeper edges without side lobes. In order to confirm our theoretical considerations, with Zemax optical design software, confirm regular focus width with the variation of the distance between two groups of mutual OCLA, the shape and intensity distribution of focal spot is confirmed in agreement quite well with theory.

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