Www.multimediatech.cz © Multimedia Technology Group České vysoké učení technické v Praze Fakulta elektrotechnická Katedra radioelektroniky Technická 2.

Prezentace na téma: "Www.multimediatech.cz © Multimedia Technology Group České vysoké učení technické v Praze Fakulta elektrotechnická Katedra radioelektroniky Technická 2."— Transkript prezentace:

1 www.multimediatech.cz © Multimedia Technology Group České vysoké učení technické v Praze Fakulta elektrotechnická Katedra radioelektroniky Technická 2 166 27 Praha 6 29/4/2011 v1.00 IBWS 2011, Karlovy Vary MAIA Meteor Automatic Imager and Analyzer Image Intensifiers in Astronomy Stanislav Vítek, Karel Fliegel, Petr Páta, Pavel Koten

2 © Multimedia Technology Group IBWS 2 011, Karlovy Vary Outline of the talk  Motivation of our work  Description of MAIA system  Image intensifier: good for any science?  Movie  Experiences, conclusions 1/11

3 © Multimedia Technology Group IBWS 2 011, Karlovy Vary Motivation of our work  Observations of faint meteor showers  Requirements for equipment  Fast enough  High gain  Affordable  Requirements for technical properties are critical  Budget → limited  Human resources → better (students) 2/11

4 © Multimedia Technology Group IBWS 2 011, Karlovy Vary History 3/11  S-VHS camcorder  25 fps  Records on tapes  Jitter  No cover

5 © Multimedia Technology Group IBWS 2 011, Karlovy Vary Description of camera  Mechanical componets  (A) Outer cover Videotec HEG47K2A000 Heating with thermostat Internal dimensions 134x88x450mm  (B) Inner cover Model Brůna I Parts milled from solid aluminium Precise adjust of all components 4/11

6 © Multimedia Technology Group IBWS 2 011, Karlovy Vary Description of camera  (2) Key electro-optical components  (A) Outer lens Pentax SMC FA 1.4/50mm (K-Mount bayonet)  (B) Image intensifier Philips (Photonis) XX1332 Aperture 50/40mm Gain up to 60000 lm/lm Resolution 30lp/mm  (C) Inner lens Pentax H1214-M 1.4/12mm Extension 250μm C-Mount  (D) Camera JAI CM-040GE GigE Vision interface (8/10bpp), 1/2” progressive mono CCD Resolution 776 x 582pix (0,45Mpix) ~PAL Framerate 61,15fps Black anodized inner cover 5/11

7 © Multimedia Technology Group IBWS 2 011, Karlovy Vary Overall description  2 stations (Kunžak a Odřejov)  ~ 210Mbps (8bpp @ 60fps, custom video format)  ~ 1TB / night  video sequences ~ 10 min  central DB, batch data processing 6/11

8 © Multimedia Technology Group IBWS 2 011, Karlovy Vary Image intensifier  Philips (Photonis) XX1332  Image intensifier for night vision  Microchannel plate 7/11

9 © Multimedia Technology Group IBWS 2 011, Karlovy Vary Electro-optical properties  Spectral sensitivity  ~ 455-845nm  Non-linear!  Automatic gain control Overall spectral sensitivityAGC 8/11

10 © Multimedia Technology Group IBWS 2 011, Karlovy Vary Electro-optical properties  Spectral response of camera  ~ 400-725nm  Spectrum on the output aperture of image intensifier  ~ 487-571nm Spectral sensitivity of cameraSpectrum on the output of II 9/11

11 © Multimedia Technology Group IBWS 2 011, Karlovy Vary Electro-optical properties  Overall resolution  Limited by used camera (0,24Mpix in circular aperture) Output aperture of image intensifier JAI CM-040GE Nikon D700 10/11

12 © Multimedia Technology Group IBWS 2 011, Karlovy Vary Experiences, Conclusions  Unprotected input aperture →   Automatic iris should be designed  New system  much better characteristics  Not working continuously 11/11

13 www.multimediatech.cz © Multimedia Technology Group České vysoké učení technické v Praze Fakulta elektrotechnická Katedra radioelektroniky Technická 2 166 27 Praha 6 29/4/2011 v1.00 IBWS 2011, Karlovy Vary MAIA Meteor Automatic Imager and Analyzer Thank for your attention