Optical Surfaces produces high precision telescope spectrograph optics, such as aspheres, mirrors, prisms, lenses and flats.
A spectrograph is an instrument that is used to study the chemical/physical conditions that exist through a cross-section of space. Combined with a land or space-based telescope a spectrograph can reveal the details that are stored in the spectral distribution of light from a distant astronomical body.
Optical Surfaces' notable projects include the Narval stellar spectropolarimeter installed on the 2m Bernard Lyot Telescope in the French Pyrenees, the High Resolution Optical Spectrograph (HROS) based on the 8m Gemini Telescope in Chile, the Fibre-fed Extended Range Optical Spectrograph (FEROS) at the European Southern Observatory (ESO) and the ESPaDOnS spectrograph at the Canada-France-Hawaii telescope (CFHT).
Investment in a range of interferometers allows one-to-one testing of even the largest diameter spectrograph optics. Topographic and fringe analysis provides precise testing of surface roughness and confirms the wavefront of various surface forms.