Post on 22-Dec-2015
P. Wizinowich & D. Le Mignantfor Keck AO Team
AOWG – June 6, 2002
Keck AO Overviewto support summit tour
Keck AO Summit Visit 10:30 Arrive at summit
Keck telescope summit visit: Acclimatize in lounge (10 min) K1 telescope optics (10 min) K1 AO enclosure (remove covers to look at AO bench components; demonstrate
driving components) + DSM + electronics room. (30 min) K2 dome floor laser room (20 min)
11:40 Lunch in K2 lounge 12:15 Resume tour
Break into three groups: (30 min) K2 laser room on elevation ring (only guide + 2 people at a time). PW
lead NIRC2 in K2 AO enclosure. NIRSPEC on right Nas platform.
Interferometer control room & lab (30 min) 13:20 Leave Summit
Keck II Left Nasmyth Platform
NIRC2
NIRSPECor Dual StarModule
ElevationRing
Enclosure withroof removed
ElectronicsRacks
AO Optics Bench
Rails to deck
NasmythPlatform
AO Benc
h
OBS Motion ControlScience Path:Image Rotator (ROT)Instrument fold (ISM)DSM fold (DFB)Filters (KFC)IR ADC (IDC,3)
Wavefront Sensor Path:Sodium dichroic (SOD)Field Steering Mirrors (FSM,4)Field Stop (FSS)Pupil Relay Lens (WPS)ND Filters (WND)Lenslet (WLS,2)Camera Focus (WCS)WFS Focus (FCS)
Tilt/Acquisition Path:Acquisition Fold (AFM)Acquisition Focus (AFS)Tilt Sensor Stage (TSS,3)Low Bandwidth Sensor (LBS,2)
Diagnostics:ND Filters (SND)Color Filters (SFS)Simulator/Fiber Positioner (SFP,3)
25 stages operational on K222 on K1
Digital I/O:White lightServo ampsEncoders
AO Science Path
K1 ImageRotator
Tip/tiltMirror
DeformableMirror
OAP1
OAP2
IR Dichroic
To NIRC2
Wavefront Sensor Path
AOA Camera
AOA CameraVideo Display
Sodium dichroic/beamsplitterField Steering Mirrors (2 gimbals)
Camera Focus
Wavefront Sensor Focus
Wavefront Sensor Optics: field stop, pupil relay, lenslet, reducer optics
Acquisition Path
Camera optics:Field & Nikon lens
PXL Camera
Focus Stage
Beamsplitter/mirror
Fold mirror
Acquisition:plate scale = 0.125 arcsec/pixelfield = 2x2 arcmin
Diagnostics:Flip & move Nikon lensplate scale = 0.0078 arcsec/pixel
LGS: Tip/Tilt & LBWF Sensors
X,Y,Z stages
Tilt Sensor& ND filter wheel
Low BandwidthWavefront SensorOpto-mechanics
Low noise PhotometricsCCD camera
Alignment, Calibration & Diagnostics
Wyko Phase ShiftingInterferometer:- mounted under bench looking at deformable mirror- also used for alignment
Pupil Simulator: - produces Keck telescope f/# & pupil location- pupil mask in collimated beam
Source Positioner:-selects between pupilsimulator, fiber & sky- fiber has 3 axes
Single mode fibers
Wyko video display
First Laser Projection 12/01
KECK
LA
S ER
Laser
Integration with Science Instruments
Name Date: 1st AO Light
Detector(# pixels & type)
Plate Scale(arcsec/pixel)
Spectral Resol’n
Notes
KCAM (UCLA)
Feb., 1999(K1 12/00)
256x256 NICMOS3
0.017 N/a Focus stage; 8-position external filter wheel; J,H,K’ internal filters
NIRSPEC(UCLA)
Feb., 2000 for spectra
1024x1024InSb
0.0185 low R0.013 high R
L=2000H=27000
10.6 magnification provided by 2
achromats on AO bench;to be replaced by
reflective optics this yearApr., 2000 for imaging
256x256 PICNIC for slit viewing
0.017 N/a
NIRC2(Caltech)
July, 2001 1024x1024InSb
0.01, 0.02 & 0.04
~5000 w/ grisms
Designed for AO system
Interferometer(JPL, CARA)
Mar, 2001 Hawaii AO on both Kecks
AO Acquis’n Camera
Apr., 1999 1024x1024CCD Photometrics
0.0075 in high res mode
N/a Only tried once, normal=0.134”/pix
SHARC(UCLA)
2005? 1024x1024 Rockwell
0.017 N/a Multiple filters; cold pupil stop
OSIRIS(UCLA)
2005? 2048x2048 Hawaii2
0.02 to 0.1 per lenslet
380016x64
lenslets
OH-Suppression integral field spectrograph
Keck DSM: Initial Install
Primary M4
Secondary M4
Fold Mirror
Fold MirrorInconel Extraction
Beamsplitter
Visible Beamsplitter
Keck AOB
7’
5’
Keck Coude Train
Keck Basement
Keck Basement
Optics Bench Devicesobseng.
screen
wfceng.
screenAOA camera
Wavefront Controller
WFC: AOCP - CAS
AOsupervisory
control
Telescope DCS
IDL
Java User Interface
pro files
slk
autom.units
cshow
epics channels
SoftwareArchitect
ure
OA
Tools
Keck Io Video