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13 October 1986 Offset Guider/Alignment System For The 2.1 m Unam Telescope
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An offset guider system has been developed for the 2.1 m S.P.M. UNAM Telescope. The system is based on an EEV P4310 CCD camera coupled to an image intensifier. A movable mirror sends a 4' x 4' field to the fixed detector system. It is done by means of collimating optics. The movable mirror scans the total field of the telescope, locating the object under study and then searching for an object suitable for guiding. The same system is used for the f/7.5, f/13.5 and f/27 ratios. The movable mirror and the collimating optics are controlled by a microprocessor system. This subsystem displays the movable mirror's field on a T.V. monitor and, if necessary, the field diaphragm of the mounted instrument. The same system allows the measuring of extrafocal images. A special algorithm determines the tilt and the decentering of the secondary mirror with respect the primary thus making the optical alignment routine easier.
© (1986) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
E. Ruiz, S. Cuevas, R. Langarica, R. Enriquez, L. Gutierrez, and L. Salas "Offset Guider/Alignment System For The 2.1 m Unam Telescope", Proc. SPIE 0627, Instrumentation in Astronomy VI, (13 October 1986);

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