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Focal ratio degradation for fiber positioner operation in astronomical spectrographs
Brent Belland, James Gunn, Dan Reiley +6
Focal ratio degradation (FRD), the increase of light's focal ratio between the input into an optical fiber and the output, is important to characterize for astronomical spectrograp…
Prime Focus Spectrograph (PFS) for the Subaru Telescope: Overview, recent progress, and future perspectives
Naoyuki Tamura, Naruhisa Takato, Atsushi Shimono +97
PFS (Prime Focus Spectrograph), a next generation facility instrument on the 8.2-meter Subaru Telescope, is a very wide-field, massively multiplexed, optical and near-infrared spec…
A New Solution for the Dispersive Element in Astronomical Spectrographs
Harland W. Epps, Judith G. Cohen, J. Christopher Clemens
We present a new solution for the dispersive element in astronomical spectrographs, which in many cases can provide an upgrade path to enhance the spectral resolution of existing m…