2026-04-17T00:38:52Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/1839522026-02-01T02:27:41Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Arasa Marti, Jose author Oteo Lozano, Esther author Blanco Nieto, Patricia author Royo Royo, Santiago author Cifuentes Medina, Andres Fernando author 2009 A high-precision, low-cost tool for optimal alignment of a compensator group in anamorphic objectives is presented. The system provides highly accurate information by analyzing the axis and field PSFs in the focal plane of the optical system under test. The PSFs are provided by a bundle of 9 different pigtailed laser diodes placed in the object field, and they are recorded by a lensless 2/3" CCD camera. The comparison of the simulated and obtained PSFs allows determining the optical element introducing the differences so action may be taken precisely on that element. The system is especially useful in non-rotationally symmetrical systems, where errors in axis position result into asymmetries of the PSF images. The tool is used for precise alignment of the cylindrical lenses in the compensator group of an anamorphic objective prior to sealing. Results show the system is able to detect misalignments of 100µm and axis positioning errors of just 30arcsec using off-the-shelf components without the need of high-precision positioning equipment. Peer Reviewed Postprint (author's final draft) Àrees temàtiques de la UPC::Ciències de la visió::Òptica física Optical instruments -- Testing Alignment PSF Optomechanics Optical testing Image quality Anamorphic system Òptica -- Aparells i instruments -- Proves Development of a compact tool for sealing the compensator group in final stages of alignment