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OSMOS

Ohio State MultiObject Spectrograph

[3D OSMOS Model from SolidWorks [3D OSMOS Model from SolidWorks [Optical Design from ZEMAX]

OSMOS (Ohio State MultiObject Spectrograph) is a wide field imager and multiobject spectrograph under construction for the 2.4m Hiltner telescope at the MDM Observatory. OSMOS employs an all-refractive, zero-deviation design to produce a plate scale of 0.3"/pixel and a 20' diameter FOV onto the MDM 4k detector system. Slits will be laser cut into spherical, NicAlloy masks that match the 2.4m focal surface. Up to 50 to 100 slitlets should be feasible. In addition, numerous long slit options will be available. The initial complement of dispersing elements will include a very low resolution triple prism and a high-efficiency, low-resolution VPH grism (the details are still TBD). The disperser wheel has sufficient space for mounting up to five dispersing elements and potential users interested in other dispersers should contact Paul Martini. The planned completion date for OSMOS is the end of 2009 with commissioning in early 2010.

Additional information:
Instrument Characteristics
New Filter Specifications

Team

Principal Investigator: Paul Martini
Co-Investigator: Rick Pogge
Mechanical Engineer: Mark Derwent
Optical Engineer: Ross Zhelem
Graduate Student: Rebecca Stoll
Undergraduate: Man-Hong Wong

Latest News

January 21, 2010: The OSMOS enclosure has arrived. Here are pictures of the preliminary assembly, prior to anodization.

Nov 6, 2009: The OSMOS enclosure design is complete and ordered. The parts are expected by the end of December.

May 8, 2009: The OSMOS collimator and camera lens barrels have arrived!

February 27, 2009: The OSMOS collimator and camera lens barrels have been completed. Acceptance testing at Coastal Optical Systems is scheduled for mid March.

January 27, 2009: The OSMOS triple prism disperser arrived today from Coastal Optical Systems. Follow the links for an image of the prism and a demonstration of zero deviation.

December 19, 2008: Assembly and testing of the double filter wheel was completed today with the lab electronics. Follow the link to a recent picture of the filter wheels and slit wheel.

Sponsors

OSMOS has been generously funded by the National Science Foundation and the Center for Cosmology and AstroParticle Physics at The Ohio State University. Additional support has also been provided by the Department of Astronomy at The Ohio State University and the Department of Physics and Astronomy at Ohio University.
The National Science Foundation The Center for Cosmology and AstroParticle Physics The Ohio State University Ohio University

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Updated: 2010 January 28 [pm]