Download - SciMeasure Wavefront Sensor Cameras and their Application in the 5m Palomar Adaptive Optics System
SciMeasure Wavefront Sensor Camerasand their Application in the
5m Palomar Adaptive Optics System
SciMeasure Analytical Systems, Inc.Ray DuVarney, Charlie Bleau, Garry Motter
Emory University, Department of PhysicsRay DuVarney*
NASA/JPL, Palomar AO TeamRich Dekany, Mitch Troy, Gary Brack
* has a financial interest in SciMeasure Analytical Systems, Inc.
History
1992 GTRI
Jim Beletic, Ray DuVarney, Charlie Bleau, Mike Adkins, Tom Collins
MIT/LLCCID11
1994 Photon Instruments
Jim Beletic, Ray DuVarney, Charlie Bleau, Mike Adkins, Tom Collins
MIT/LLCCID11
1996 SciMeasure (NASA/JPL)
Ray DuVarney, Charlie Bleau, Mike Adkins
MIT/LLCCID19
1997 SciMeasure (SBIR Phase I)
Ray DuVarney, Charlie Bleau, Mike Adkins
EEVCCD39
1998 SciMeasure (SBIR Phase II)
Ray DuVarney, Charlie Bleau, Garry Motter
EEVCCD39
Camera System Overview
Camera Control Unit
Power Supply
Camera Head
CCD Enclosure
Clocks
Biases
TEC
Video
1.2 Ghz Bi-directional Control/data Fiber-optic Link
RS-232 Control
Halt Signal
RS-170 Video
Data Out
4 12-bit Data Ports
Overflow/handshake Port (SOF/SOL/DRDY)
Stopped Status
FIBER COMM & DATA
REALTIME DISPLAY
GRAPHICS DISPLAY
VIDEO OVERLAY
DATA CAPTURE
SEQUENCER
+5V DIGITAL
±12V ANALOG
+24V ANALOG
CLOCK DRIVERS
FIBER COMM & DATA
ANALOG PROCESSOR
PREAMPLIFIER
CCD
4-3
Sequencer
Address Bus
Data Bus
Programs Subroutines Patterns
11-12 8-12 8-12
15 15 158 8
24
8
8-bit 8-bit 32-bit
8
7-3 7-3
Address Generator
Addr
Mux
32K
Static
RAM
Data
Mux
Addr
Mux
32K
Static
RAM
Data
Mux
Addr
Mux
32K
Static
RAM
Data
Mux
Address Generator
50 MHz Clock
ISA Bus Inter-face
Data
O/P
Address Generator
Ext.Select & Sync
Sequencer Programming
Programs
Subroutines
Patterns
define program 0; # 1100 Hz Nominal
subroutine start_of_frame; repeat 32; subroutine read_line; end repeat; repeat 2; subroutine integrate; end repeat;end define;
define subroutine read_line;
pattern send_start_of_line 1; pattern shift_line 1; pattern wait 10; pattern shift_pixel 17; pattern read_pixel 32;
end define;
define pattern read_pixel;
## t = /turbo, c = /clamp, S = sample, V = *DCAV# RG IA BS OR xxx t c S CCCC FV xx# 123 123 123 0123
0 010 010 010 000 0 1 0 1111 01 00; # 0 010 010 010 000 0 1 0 1111 01 00; # 1 010 010 010 000 0 1 0 1111 01 00; # 0 010 010 010 000 0 1 0 1111 01 00; # 0 010 010 010 000 0 0 0 1111 01 00; # 0 010 010 010 000 1 0 1 1111 01 00; # 0 010 010 010 000 1 0 1 1111 01 00; # 0 010 010 010 000 1 0 1 1111 01 00; #
0 010 010 001 000 1 0 1 0000 01 00; # 0 010 010 001 000 1 0 1 0011 01 00; # 0 010 010 001 000 1 0 1 1000 01 00; # 0 010 010 001 000 0 0 1 0100 01 00; # 0 010 010 001 000 0 0 1 1100 01 00; # 0 010 010 001 000 0 0 1 0010 01 00; # 0 010 010 001 000 0 0 1 1010 01 00; # 0 010 010 100 000 0 0 1 0110 01 00; #
0 010 010 100 000 0 0 1 1111 01 00; # 0 010 010 100 000 0 0 0 1111 01 00; # 0 010 010 100 000 0 1 0 1111 01 00; # 0 010 010 100 000 0 1 0 1111 01 00; # 0 010 010 100 000 0 1 0 1111 01 00; # 0 010 010 100 000 0 1 0 1111 01 00; # 0 010 010 100 000 0 1 0 1111 01 00; # 0 010 010 100 000 0 1 0 1111 01 00; #
end define;
Fiber Link
CAMERA CONTROL UNIT (CCU)
CAMERA HEAD UNIT (CHU)
Filter
Offset
Gain
CCD Clocks
Clamp
Sample
Turbo
Digital Video Ports
Digital Data Ports
External Sequencer Data
1.2 Ghz Bidirectional Control/data Fiber-optic Link
MUX
MUX
DEMUX
DEMUX
ONBOARDSEQUENCER TRANS-
CEIVERONBOARD SCANCONVERTER
TEMP/VACUUMSTATUS, ETC
DATA
TRANS-CEIVER
CONTROL
CLOCKS
Preamplifier Board
A=5
75 ohm drivers
Video Outputs
Temperature
CCD Clocks
CCD Biases
TEC Power
Clock Filters
Bias Filters
TEC Filters
CCD Peltier Pack
Analog Processor
8
2
2
Sample
Offset
Clamp
VideoGain
Filter
Turbo
Data
1 of 4 channels
75 ohms
HIGH SPEED SHUNT
TIME CONST. 1 of 4
GAIN 1 of 4
CLAMP
OFFSET
A/D
Data Output/Display/Capture
Data
R
G
B
S
RS-170Video
DataStream
RealtimeDataPorts
ISA Bus
Data Capture Card
Realtime Display Card
Fiber Link Card
1 MEGAPIXEL DUAL PORT STATIC RAM
ISA BUS INTERFACE
RS-422
STATIC RAM
REALTIME SCAN
CONVERTER
INTERNAL SCAN
CONVERTER
DEMUX
Control Panel
Noise(e-)
Pixel Rate(/sec/port)
Frame Rate(/sec)
3.0 @ 80 kpix 50
3.5 @ 178 kpix 110
5.9 @ 1.14 Mpix 550
7.5 @ 2.00 Mpix 1100
Camera Performance
EEV CCD39 - 64x64 pixel frame size - Read Noise calculated from Photon Transfer curveMIT/LL CCID19 achieved 6.5 e- @ 1.1 Mpix/sec/port and 600 frames/sec
Future Camera Overview I
Control Unit
Power Supply
Camera Head
CCD Enclosure
Clocks
Biases
TEC
Video
1.2 Ghz Bi-directional Control/data Fiber-optic Link
RS-232 Control
Halt Signal
Data Out/Handshake
16-bit Data Ports
SOF/SOL/DRDYStopped Status
FIBER COMM/DEMUX
POWER/BIASES
CONTROLLER/SEQUENCER
CLOCK DRIVERS
FIBER COMM/MUX
ANALOG PROCESSOR(S)
12, 14 or 16-bit options
PREAMPLIFIER
CCD
160 mm 3U cards
160 mm 3U cards
DATA OUTPUT
Future Camera Overview II
Power SupplyCamera Head
CCD Enclosure
Clocks
Biases
TEC
Video
RS-232 Control
Halt Signal
16-bit Data Ports &
SOF/SOL/DRDY
Stopped StatusPOWER/BIASES
CONTROLLER/SEQUENCER
CLOCK DRIVERS
ANALOG PROCESSOR(S)
12, 14 or 16-bit options
PREAMPLIFIER
CCD
160 mm 3U cards
DATA OUTPUT
Palomar AO System
PALAO Performance
PALAO Results
PALAO Results
AO Loop Open FWHM = 1.2"
AO Loop Closed FWHM = 0.097" (Strehl = 20%)
QS Aql (HR 7486) Binary Star
with 0.185"
Separation
PALAO Results
Trapezium Cluster in the Orion Nebula
The left image was taken with the AO system off; the seeing was about 1 arcsec. With the AO system locked on Theta 1 Ori C (brightest star), the stellar images were about 0.2" across, with the brightest stars saturated. Each image is represents approximately 40 arcsec x 40 arcsec field.
Acknowledgements
•SBIR Phase I Grant NAS8-97195
•SBIR Phase II Grant NAS8-98081
•Jim Beletic and the ESO Optical Detector Team
•Mike Shao - Director, Interferometry Center of Excellence, NASA/JPL
•Eric Bloemhof - Mt. Palomar Observatory
•Horace Dale - Physics Dept, Emory University