Top / Optical Channel / Notes for Simultaneous NIR Imaging

Notes

There are several disadvantages for NIR imaging in the simutaneous opt-NIR mode.

  • Degrade of image quality : Currently, a strong astigmatism occurs in the NIR channel and the final image quality is worse than 1.0arcsec. The possible cause is the misalignment of the light axis (order of 0.5degree) caused by inserting the dichroic mirror.
  • Lower System Efficiency : The total system efficiency becomes lower from 27% to 22% in H and K, and from 20% to 16% in J.

Front page   Edit Unfreeze Diff Backup Upload Copy Rename Reload   New List of pages Search Recent changes   Help   RSS of recent changes
Last-modified: 2009-08-11 (Tue) 15:16:14 (2961d)