Proceedings Article | 6 August 2014
KEYWORDS: Prisms, Mirrors, Collimators, Cameras, Sensors, Telescopes, Imaging systems, Spectrographs, Optical design, Interfaces
The Multi-Object Broadband Imaging Echellette (MOBIE) is the seeing-limited, visible-wavelength imaging multiobject
spectrograph (MOS) planned for first-light use on the Thirty Meter Telescope (TMT). The MOBIE project to
date has been a collaboration lead by UC Observatories (CA), and including the UH Institute for Astronomy (HI), and
the NAOJ (Tokyo, Japan). The current MOBIE optical design provides two color channels, spanning the 310–550nm
and 550-1000nm passbands, and a combination of reflection gratings, prisms, and mirrors to enable direct imaging and
three spectroscopic modes with resolutions (λ/triangle λ) of roughly 1000, 3000, and 8000 in both color channels, across a field of view that ranges from roughly 8x3 arcmin to 3x3 arcmin, depending on resolution mode. The conceptual design phase for the MOBIE instrument has been underway since 2008 and is expected to end in 2015. We report here on developments since 2010, including assembly of the current project team, instrument and camera optical designs,
instrument control systems, atmospheric dispersion corrector, slit-mask exchange systems, collimator, dichroic and fold
optics, dispersing and cross-dispersing optics, refracting cameras, shutters, filter exchange systems, science detector
systems, and instrument structures.
