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f/32 Optics

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The f/32 camera optics provides NIRI with a narrow-field imaging mode optimised for the image quality obtainable with adaptive optics (AO) correction at a pixel scale of 0.022"/pixel and a fov of ~22". The f/32 camera lens is a multi-component (4) lens of diameter ~60mm made of BaF2, ZnSe, LiF and ZnS. All surfaces are spherical. The f/32 lens barrel can be seen in the photo below. The collimated telescope beam (from the collimator lens, seen at the left edge of the photo, to filter wheel #2 and the pupil mask/filter wheel) enters the photo from the left, encounters beam steerer #1 (a flat mirror) and, for the f/32 camera, is deflected to the right, to the f/32 lens. At the end of the f/32 camera lens is a flat mirror that directs the beam downwards and through the optical table.

[NIRI f/32 Optics]

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Last update August 4, 2000; Colin Aspin