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History of Beam Shaping
Published in Fred M. Dickey, Scott C. Holswade, David L. Shealy, Laser Beam Shaping Applications, 2018
Ebata et al.98 used a single point diamond turning lathe to form two plano-aspheric ZnSe lenses of a laser beam shaper which transforms a Gaussian beam into a top-hat output beam for use with a CO2 laser material processing at a wavelength of 10.2 μm. Ebata et al. used the conservation of energy to determine a relationship between the input and the output ray heights at the two aspheric lenses. The authors also took into account the curvature of the incident laser beam wavefront incident upon the planar surface of the first beam shaper lens and used the small angle approximation for incorporating Snell’s law at each refracting surface. These approximations permit the evaluation of the sag of the first refracting surface but without imposing the constant optical path length condition for all rays passing through the beam shaper. The second lens compensates for the phase distortion introduced by the first lens while also conserving energy. This is achieved using an aspheric and a spherical lens for the second lens of the beam shaper. Finally, the authors discuss fabrication and testing of beam shaper optics.
Opto-Mechanical Characteristics of Materials
Published in Paul Yoder, Daniel Vukobratovich, Opto-Mechanical Systems Design, 2017
Optical shop methods and processing materials have been described by such authors as Malacara (1978), DeVany (1981), Karow (1995), Englehaupt (1997), and, most recently, Harris (2011). Numerous conferences and workshops dealing with optical fabrication and testing have been sponsored over the years by the Optical Society of America (OSA), the International Society for Optical Engineering (SPIE), the European Optical Society (EOS), the Deutschen Gesellschaft für angewandte Optik (DGaO), the International Commission for Optics (ICO), and other organizations. Proceedings from such events provide guidance in those areas. In addition, technical papers on related subjects (too many to list here) have been published in the technical journals of the international optical communities.
Ray Tracing
Published in Daniel Malacara-Hernández, Brian J. Thompson, Fundamentals and Basic Optical Instruments, 2017
Ricardo Flores-Hernández, Armando Gómez-Vieyra
The span of Optical System Design goes from the conception (initial idea pictured by means of paraxial optics), through several optimization stages, (theoretical calculations improving geometrical optics system's performance), to its materialization (component fabrication and testing and optical device's assembly and evaluation).
Zoom projection lens design for small throw ratio and large field of view
Published in Journal of Modern Optics, 2018
Daoping Li, Jihong Zheng, Bo Yang
A laser zoom projection lens with a small TR and large FOV is presented in this paper. The projection lens consists of 15 refractive lenses and one even aspheric mirror. The magnification range of the projection lens is 123–184 in. (3.1242–4.6736 m), the screen size (diagonal, 16:9 aspect ratio) ranges from 80 to 120 in. (2.032 to 3.048 m), the TV distortion < 0.6%, RMS < 1.1 mm, relative illumination > 85% and MTF > 0.4 at 0.55 lp/mm for all fields and zoom conditions. When the tolerance error is considered, the RMS value is less than 1 mm for all fields and zoom conditions. Finally, the fabrication and testing of the projector lens are completed according to the model. The refractive–reflective structure can easily achieve ultra-thin large screen projection displays.