SciMeasure Wavefront Sensor Cameras and their Application in the 5m Palomar Adaptive Optics System

1
SciMeasure Wavefront Sensor Camerasand their
Application in the5m Palomar Adaptive Optics
System

• SciMeasure Analytical Systems, Inc.
• Ray DuVarney, Charlie Bleau, Garry Motter

Emory University, Department of Physics Ray
DuVarney
has a financial interest in SciMeasure
Analytical Systems, Inc.
NASA/JPL, Palomar AO Team Rich Dekany, Mitch
Troy, Gary Brack
2
History
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Camera System Overview
RS-170 Video Data Out 4 12-bit Data
Ports Overflow/handshake Port (SOF/SOL/DRDY)
SEQUENCER
RS-232 Control
FIBER COMM DATA
REALTIME DISPLAY
GRAPHICS DISPLAY
Halt Signal
VIDEO OVERLAY
DATA CAPTURE
Stopped Status
Camera Control Unit
1.2 Ghz Bi-directional Control/data Fiber-optic
Link
Clocks
5V DIGITAL
CLOCK DRIVERS
PREAMPLIFIER
Biases
12V ANALOG
FIBER COMM DATA
CCD
TEC
24V ANALOG
ANALOG PROCESSOR
CCD Enclosure
Power Supply
Video
Camera Head
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Future Camera Overview I
DATA OUTPUT
Data Out/Handshake 16-bit Data Ports SOF/SOL/DRDY
FIBER COMM/DEMUX
RS-232 Control
CONTROLLER/SEQUENCER
Halt Signal
Stopped Status
Control Unit
160 mm 3U cards
1.2 Ghz Bi-directional Control/data Fiber-optic
Link
POWER/BIASES
Clocks
CLOCK DRIVERS
PREAMPLIFIER
Biases
FIBER COMM/MUX
Power Supply
CCD
ANALOG PROCESSOR(S) 12, 14 or 16-bit options
TEC
CCD Enclosure
Video
Camera Head
160 mm 3U cards
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Future Camera Overview II
RS-232 Control
DATA OUTPUT
Halt Signal
CONTROLLER/SEQUENCER
Stopped Status
Clocks
POWER/BIASES
16-bit Data Ports SOF/SOL/DRDY
PREAMPLIFIER
Biases
CLOCK DRIVERS
CCD
ANALOG PROCESSOR(S) 12, 14 or 16-bit options
TEC
CCD Enclosure
Video
Power Supply
Camera Head
160 mm 3U cards
6
Sequencer
Address Bus
ISA Bus Inter-face
Data Bus
15
15
15
8
8
8
8
Programs
Subroutines
Patterns
24
Addr Mux
32K Static RAM
Data Mux
Addr Mux
32K Static RAM
Data Mux
Addr Mux
32K Static RAM
Data Mux
Data O/P
Ext. Select Sync
4-3
7-3
7-3
8-bit
8-bit
32-bit
11-12
8-12
8-12
Address Generator
Address Generator
50 MHz Clock
Address Generator
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Sequencer Programming
Patterns
Programs
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
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
Subroutines
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
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Fiber Link
CAMERA CONTROL UNIT (CCU)
Digital Video Ports
DEMUX
ONBOARD SEQUENCER
Digital Data Ports
MUX
TRANS-CEIVER
ONBOARD SCAN CONVERTER
External Sequencer Data
1.2 Ghz Bidirectional Control/data Fiber-optic
Link
Gain
Offset
TEMP/VACUUM STATUS, ETC
Filter
DEMUX
CONTROL
MUX
TRANS-CEIVER
CCD Clocks
DATA
CLOCKS
Clamp
Sample
CAMERA HEAD UNIT (CHU)
Turbo
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Clock Driver Board
V span
Variable Regulator
12V
Level Shifter
EL 7182
TTL In
Vout
Variable Regulator
-12V
V low

• 12 Individually Programmable Clocks
• 11V Range
• 16V Maximum Swing
• 20 ns Switching Time

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Preamplifier Board
Clock Filters
CCD Clocks
A5
CCD Peltier Pack
Video Outputs
Bias Filters
CCD Biases
75 ohm drivers
Temperature
TEC Filters
TEC Power
11
Analog Processor
1 of 4 channels
Turbo
HIGH SPEED SHUNT
2
Filter
2
Gain
TIME CONST. 1 of 4
GAIN 1 of 4
Video
Data
A/D
75 ohms
Clamp
CLAMP
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Offset
OFFSET
Sample
12
Data Output/Display/Capture
Data Stream
Data Capture Card
Fiber Link Card
INTERNAL SCAN CONVERTER
ISA Bus
1 MEGAPIXEL DUAL PORT STATIC RAM
ISA BUS INTERFACE
RS-422
Realtime Data Ports
DEMUX
Data
R
G
REALTIME SCAN CONVERTER
STATIC RAM
RS-170 Video
B
S
Realtime Display Card
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Control Panel
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Camera Performance
EEV CCD39 - 64x64 pixel frame size - Read Noise
calculated from Photon Transfer curve MIT/LL
CCID19 achieved 6.5 e- _at_ 1.1 Mpix/sec/port and
600 frames/sec
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Palomar AO System
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PALAO Performance
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PALAO Results
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PALAO Results
QS Aql (HR 7486) Binary Star with 0.185"
Separation
AO Loop Open FWHM 1.2"
AO Loop Closed FWHM 0.097" (Strehl 20)
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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.
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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