• Total system bandwidth is 0.37 to 1.8μm
  • Cross over between Vis optimised system and NIR optimised system is 0.8μm
  • Coverage at R5000 is achieved with 3 VPH in Vis and 3 VPH in NIR

 

  • Initial optical concept for the visible spectrograph, with the final optical architecture, indicates that the beam size will be around 200-230 mm
  • Camera speed is ~ F/1.6
  • ie a feasible design
  • [The concept is actually quite close in terms of parameters to the WEAVE spectrograph that Oxford, GEPI and NOVA are involved in]
  • More detailed concept is currently under investigation...

 

NIR Spectrograph architecture concept design (R5000) - (Camera is F/1.71)

NIR Spectrograph architecture concept design (R15000) - (Camera is F/1.71) 

 

Visual Spectrograph

Top view of the optical model on the optical bench with science light beam. Common optics: Slit lens, Collimator Mirror, Set of Corrector lenses, Volume Phase Holographic Grating (VPHG, Low Res and High Res, Camera, Detector. Camera position is low-resolution with small angel and the high resolution at steep angle and sketched mechanical structure.

Characteristics: Collimator F/3.64 pupil 190 mm, Camera F/1.7, total size 2 x 2.5 meter, height 1 meter

 VIS Spectrograph architecture concept design

Who are we? Infos on the MOSAIC consortium.

CONSORTIUM

Scientific goals and milestones: why MOSAIC?

SCIENCE

How do we get there? All the technology behind MOSAIC.

INSTRUMENT

What performance can we expect from MOSAIC?

PERFORMANCE

How will MOSAIC fit in the instrumental landscape?

Synergy