Transcript NGAO 1-tier optical relay.ppt

NGAO 1-tier Draft
Optical Relay Design
P. Wizinowich
12/3/07
D-IFS / LOWFS Focal Plane
(150” dia field of view)
Very similar to existing Keck AO optical relay:
- Image rotator larger
- Same OAPs (but larger diameter)
- Same pupil size on DM
- Same opening angle to DM
- D-IFS & LOWFS at NIRC2 location
D-IFS / LOWFS
OAP1
at 12.8 km conjugate
OAP2
DM (woofer)
150” Field to 2nd Relay
(150” dia field of view)
NGS WFS Focal Plane
(30” dia field of view)
1. Mirror for NGS AO narrow field science
2. Open for d-IFS LGS AO science
3. JH transmissive, K-band reflective
4. JH transmissive, visible reflective
5. J transmissive, H-band reflective
6. H transmissive, < H-band reflective
NGS WFS
OAP3
DM
(tweeter)
OAP4
NIR Camera Focal Plane
(30” dia field of view)
1. JHK reflective, visible transmissive
2. Mirror for LGS NIR science (option)
3. Open for Visible science (option)
NIR Camera
Visible Camera Focal Plane
(30” dia field of view)
1. Open for NGS NIR science
2. Mirror for LGS Vis science
3. I transmissive dichroic for
NGS Vis science (option)
Visible Camera
OSIRIS Focal Plane
(30” dia field of view)
OSIRIS
(or DSM)
1. Open
2. K reflective, < K transmissive
3. H reflective, < H transmissive
4. J reflective, < & > J transmissive
LGS WFS Focal Plane
(150” dia field of view, LGS at 90 km)
Mirror folds beam
vertically to LGS WFS
Focal plane 475 (180 km) to
600 mm (90 km) from mirror
Option of LGS ACAM above fold
OAP2b
(optimized for LGS)
1. Na Reflective Dichroic
transmits > 650 nm
2. Open for NGS science (option)
LGS WFS Focal Plane
(150” dia field of view, LGS at 90 km)
With d-IFS & narrow field beams overlaid
NGS Acquisition Camera Fold
(150” dia field of view)
Option 1. Horizontal (or vertical) Fold
Option 2. Vertical Fold