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College of Mathematical & Physical Sciences
Department of Astronomy

Filter Specifications

Here are specifications for new filters for OSMOS. Anyone interested in purchasing new filters for OSMOS are strongly encouraged to contact Paul Martini in advance.

Physical Parameters:
Size: 101.5 x 101.5mm (+-0.5mm)
Thickness: 7mm (+-0.5mm)
Parallelism: <2 arcminutes
Chamfer: 0.5mm on all edges
Edge: fine ground, painted black
Operating temperature: -10C to +20C

Optical Parameters:
Clear aperture: 90% of physical size
Angle of incidence: 8 degrees
Surface flatness: 1 wave PV at 633nm over clear aperture
Surface quality: 80/50 scratch dig

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Updated: 2009 Sept 12 [rz/pm]