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

Development of a compact tool for sealing the compensator group in final stages of alignment Arasa Marti, Jose Oteo Lozano, Esther Blanco Nieto, Patricia Royo Royo, Santiago Cifuentes Medina, Andres Fernando Universitat Politècnica de Catalunya. Centre de Desenvolupament de Sensors, Instrumentació i Sistemes Universitat Politècnica de Catalunya. Departament d'Òptica i Optometria Universitat Politècnica de Catalunya. GREO - Grup de Recerca en Enginyeria Òptica 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 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) 2009 Conference lecture Arasa, J. [et al.]. Development of a compact tool for sealing the compensator group in final stages of alignment. A: Advances in Optomechanics;. "Proceedings Volume 7424, Advances in Optomechanics". Washington: International Society for Photo-Optical Instrumentation Engineers (SPIE), 2009, p. 74240S-1-74240S-7. 9780819477149 https://hdl.handle.net/2117/183952 10.1117/12.828879 eng https://www.spiedigitallibrary.org/conference-proceedings-of-spie/7424/74240S/Development-of-a-compact-tool-for-sealing-the-compensator-group/10.1117/12.828879.short?webSyncID=ce46e9e6-ec7a-49da-b6a0-cbad059329ad&sessionGUID=883c9d90-2bc9-993c-ed26-8bead49a2853 Restricted access - publisher's policy application/pdf International Society for Photo-Optical Instrumentation Engineers (SPIE)