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