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Rob Pettengill - TSP 2015
The Astro Raspberry Pi Camera System 4
Rob Pettengill (rcp@alumni.stanford.edu)Rob PettengillRob...
Rob Pettengill - TSP 2015
AGENDA
• Why Build Your OwnWhy Build Your Own
Camera?

• How I Built Mine

• What I Learned

• W...
Rob Pettengill - TSP 2015
Internet Of Things And Astronomy
• Remote Observing downsized & updated.
• GoTo telescope contro...
Rob Pettengill - AASRob Pettengill - AAS 4
http://www.raspberrypi.org
http://beagleboard.org/Products/BeagleBone+Black
htt...
Rob Pettengill - AAS
W h a t Wa s I m p o r t a n t To M e ?
I wanted to combine my interests in small
electronics & Astro...
Rob Pettengill - AAS
Why Build Your Own Camera?
• Sensor
• Customize to your scope and
target
• Functions
• Enhanced Focus...
Rob Pettengill - TSP 2015
R P i + C a m e r a M o d u l e +
Q u e s t a r C a m e r a A d a p t e r
C a n I t Wo r k ?
7
h...
Rob Pettengill - TSP 2015
Hang Me ’Til I’m Done
Astro RPi 2.0
8
Rob Pettengill - TSP 2015
Screw Me Up Tight
Astro RPi 3.0
Uses a T-ring as a nut to bolt mounting plate for camera to theU...
Rob Pettengill - TSP 2015
A System Platform
Astro RPi 4.0
Uses simple metal cage for sensor board with a T-ring as a nut t...
Rob Pettengill - TSP 2015
Sensor Board Mount Parts
11
Rob Pettengill - TSP 2015
Assembled Sensor Cage & Telescope Adapter
12
Rob Pettengill - TSP 2015
Assembled Sensor Cage & Telescope Adapter
13
Rob Pettengill - TSP 2015
Acquisition Software Stack
IOT based model - smart devices, using web based
interfaces on the ne...
Rob Pettengill - TSP 2015 15
72 image Astro Raspberry Pi Lunar Panorama made with Hugin
Rob Pettengill - TSP 2015Rob Pette...
Rob Pettengill - TSP 2015 16
BerryCam ready for Jupiter
imaging
Rob Pettengill - TSP 2015 17
Jupiter Io & Europa 240 of 500 images stacked & sharpened
Rob Pettengill - TSP 2015
Lessons Learned
• To ease switching from visual to sensor views, Prime focus sensor
should be lo...
Rob Pettengill - TSP 2015
What's Next?
• Investigate larger sensors - Lack of Linux ARM drivers for high
quality imaging c...
Rob Pettengill - TSP 2015
Extra Slides On ImageExtra Slides On Image
Evaluation
20
Rob Pettengill - TSP 2015
Quick Resolution Check
• Calculate angular
pixel size
• Down-sample image
to reference
resolutio...
Rob Pettengill - TSP 2015
• Down-sample a reference image to the desired resolution
• Up-sample reference images match you...
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The Astro Raspberry Pi Camera System 4

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A prime focus planetary astrophotography camera is built using the Raspberry Pi camera module with wireless camera control and image display via a table or smartphone. A simple construction architecture allows the camera to be implemented with other processors and sensors with a reliable rigid connection to most telescopes. Presented at the 2015 Texas Star Party. High resolution example images are available from http://astronomy.robpettengill.org/

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The Astro Raspberry Pi Camera System 4

  1. 1. Rob Pettengill - TSP 2015 The Astro Raspberry Pi Camera System 4 Rob Pettengill (rcp@alumni.stanford.edu)Rob PettengillRob Pettengill Texas Star PartyTexas Star Party 16 May 2015 1 Pie image from http://www.flickr.com/photos/rexroof/3802694376/ Creative Commons Attribution 3.0 Unported
  2. 2. Rob Pettengill - TSP 2015 AGENDA • Why Build Your OwnWhy Build Your Own Camera?
 • How I Built Mine
 • What I Learned
 • What’s Next? • Build Your Camera Not Mine Christos Vasilas of Dash One 2 1st afocal RPi Cam astro images
  3. 3. Rob Pettengill - TSP 2015 Internet Of Things And Astronomy • Remote Observing downsized & updated. • GoTo telescope control • PushTo instrumentation and link to planetarium software • Automatic focusing. • Guiding • Camera control and enhancement. • Plate solving. 3 http://vaticanobservatory.org http://simonbox.info/index.php/astronomy http://www.recantha.co.uk/blog/?p=3615 http://astrobeano.blogspot.com/2014/01/instrumented-telescope-with-raspberry.html
  4. 4. Rob Pettengill - AASRob Pettengill - AAS 4 http://www.raspberrypi.org http://beagleboard.org/Products/BeagleBone+Black http://www.intel.com/content/www/us/en/do-it-yourself/edison.html
  5. 5. Rob Pettengill - AAS W h a t Wa s I m p o r t a n t To M e ? I wanted to combine my interests in small electronics & Astronomy in a project. • Saw potential in credit card sized computers. • Replace the laptop with a small low power wireless computer. ARM based IOT computers are powerful yet small and low power. • Replace the laptop display with a wirelessly connected cell phone or iPad. Better displays than many laptops and far better than camera displays. 5 Terry BeliaTerry Belia astrotex.com
  6. 6. Rob Pettengill - AAS Why Build Your Own Camera? • Sensor • Customize to your scope and target • Functions • Enhanced Focusing • Region of Interest Crop • Packaging • Size & Weight • Cooling • Cost • Fun 6
  7. 7. Rob Pettengill - TSP 2015 R P i + C a m e r a M o d u l e + Q u e s t a r C a m e r a A d a p t e r C a n I t Wo r k ? 7 https://www.flickr.com/photos/robpettengill/sets/72157635483690850/
  8. 8. Rob Pettengill - TSP 2015 Hang Me ’Til I’m Done Astro RPi 2.0 8
  9. 9. Rob Pettengill - TSP 2015 Screw Me Up Tight Astro RPi 3.0 Uses a T-ring as a nut to bolt mounting plate for camera to theUses a T-ring as a nut to bolt mounting plate for extension tubes 9
  10. 10. Rob Pettengill - TSP 2015 A System Platform Astro RPi 4.0 Uses simple metal cage for sensor board with a T-ring as a nut toUses simple metal cage for sensor board with a T-ring as a nut to bolt Uses simple metal cage for sensor board with a T-ring as a nut to mounting plate to the telescope adapter. 10
  11. 11. Rob Pettengill - TSP 2015 Sensor Board Mount Parts 11
  12. 12. Rob Pettengill - TSP 2015 Assembled Sensor Cage & Telescope Adapter 12
  13. 13. Rob Pettengill - TSP 2015 Assembled Sensor Cage & Telescope Adapter 13
  14. 14. Rob Pettengill - TSP 2015 Acquisition Software Stack IOT based model - smart devices, using web based interfaces on the network, to talk to personal devices. • On the Raspberry Pi • Camera Interface (raspicam) • Web Server - translate camera control from Web requests to raspicam, serve up images for aiming and focusing • Image storage on local SD card • Wireless ad hoc WiFi network for communication • On a smartphone or tablet • Web browser / Berrycam with camera control interface • Last still image • Streaming video 14
  15. 15. Rob Pettengill - TSP 2015 15 72 image Astro Raspberry Pi Lunar Panorama made with Hugin Rob Pettengill - TSP 2015Rob Pettengill - TSP 2015
  16. 16. Rob Pettengill - TSP 2015 16 BerryCam ready for Jupiter imaging
  17. 17. Rob Pettengill - TSP 2015 17 Jupiter Io & Europa 240 of 500 images stacked & sharpened
  18. 18. Rob Pettengill - TSP 2015 Lessons Learned • To ease switching from visual to sensor views, Prime focus sensor should be located as close to parfocal with the eyepiece as possible. • Wireless connection speeds limit ease of aiming and focussing. Important features include: • high speed wireless networks • focus peaking • region of interest cropping 18
  19. 19. Rob Pettengill - TSP 2015 What's Next? • Investigate larger sensors - Lack of Linux ARM drivers for high quality imaging chips is a barrier for now. A few already provide Intel Linux drivers and some ARM Linux (Point Grey). • Improve ad hoc network speeds via faster wireless adapter or feathered operation. • Add region of interest cropping to focussing mode and image capture mode. • Add adjustable focus peaking display fo focussing mode. 19
  20. 20. Rob Pettengill - TSP 2015 Extra Slides On ImageExtra Slides On Image Evaluation 20
  21. 21. Rob Pettengill - TSP 2015 Quick Resolution Check • Calculate angular pixel size • Down-sample image to reference resolutions • Up-sample reference images to original size • Compare original to reference images 21
  22. 22. Rob Pettengill - TSP 2015 • Down-sample a reference image to the desired resolution • Up-sample reference images match your own image • Compare your original to reference images 22 Comparative Resolution Check • Find HQ Reference • Calculate angular pixel resolution sizes

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