<title>Design and analysis of an elliptical Gaussian laser beam shaping system</title>

Optical design of laser beam shaping systems

“…Using these results, the performance of a two-mirror laser beam shaping system, which transforms an input beam with elliptical cross section of 3:1 ratio of beam waist in perpendicular directions, has been analyzed. 12 The relative output illumination is shown in Figure 5. The aspherical deviation of the mirror surfaces from best-fit sphere has been shown to be 120 µm for a 6mm diameter mirror.…”

“…McDermit and Horton 9 use conservation of energy within a bundle of rays to design rotationally symmetric reflective optical systems for illuminating a receiver surface in a prescribed manner using a non-uniform input beam profile. Malyak, 11 Shealy and Chao 12 have designed a two-mirror laser profile shaping system with rectangular symmetry and no central obscuration which transforms an input Gaussian beam into a uniform irradiance output beam. Kreuzer 2 has patented a coherent-light optical system using two aspherical surfaces to yield an output beam of desired intensity distribution and wavefront shape.…”

“…Both reflective 9,10,11,12 and refractive 2, 13, 14, 15 optical systems have been used to shape laser beam profiles. McDermit and Horton 9 use conservation of energy within a bundle of rays to design rotationally symmetric reflective optical systems for illuminating a receiver surface in a prescribed manner using a non-uniform input beam profile.…”

Historical perspective of laser beam shaping

“…McDermit and Horton 25 use conservation of energy within a bundle of rays to design rotationally symmetric reflective optical systems for illuminating a receiver surface in a prescribed manner using a non-uniform input beam profile. Malyak, 26 Shealy and Chao 27 have designed a two-mirror laser profile shaping system with rectangular symmetry and no central obscuration. Kreuzer 29 has patented a coherentlight optical system using two aspherical surfaces to yield an output beam of desired intensity distribution and wavefront shape.…”

“…23,24 For illumination applications using a laser beam, such as in holography, materials processing, and lithography, it is very important to uniformly illuminate the target surface. Both reflective 12,25,26,27 and refractive 28,29,30,31,32, optical systems have been used to shape laser beam intensity profiles. McDermit and Horton 25 use conservation of energy within a bundle of rays to design rotationally symmetric reflective optical systems for illuminating a receiver surface in a prescribed manner using a non-uniform input beam profile.…”