Archive for June, 2011

Caeleste first seminar on Xray detection and radiation hardness

posted by Patrick @ 14:52 PM

On June 17, Caeleste organized in Antwerpen, Belgium, its first seminar on scientific CMOS imaging with top speakers from SkyScan, CERN, UZB, Harvest Imaging and the ESRF to celebrate its 5th year of operation. The event and the evening parties were great success, and a similar event will inevitably take place again in the future.






The topic of this year seminar was “sensing and withstanding X-rays, gammas and heavy particles”.

Following top specialists kindly agreed to share their point of view on this topic during a session with six outstanding presentations:

1.      Albert Theuwissen from Harvest Imaging and T.U.Delft:  “Cosmic radiation damage in image sensors”
2.      Jeroen Hostens from SkyScan: “Micro-CT in biological science”
3.      Evi Bongaers from SkyScan: “The use of micro-CT in material science”
4.      Erik Heijne from CERN: “From microscope to attoscope: silicon eyes at the CERN LHC”
5.      Claire Bourgain from V.U.B. and UZ-Brussel: “The diagnostic relevance of color X-ray”
6.      Pablo Fajardo from E.S.R.F.: “Detectors for hard X-ray synchrotron radiation applications”

The event was followed by our birthday party at our Office in Antwerpen Berchem. We would like to thank all the participants and the speakers again for attending our seminar. See you all next year for our 6th anniversary event!

If you wish to get in contact with the speakers, please do not hesitate to contact us!



Caeleste latest papers published and presented at IISW, Hokkaido, Japan are now available for download.

Color X-ray photon counting image sensor

State of the art medical X-ray image sensors are “charge integration” based, which results in an overall noise that is composed of the quantum limited photon shot noise, electronic read noise and excess noise due to the non-reproducible charge packet sizes per absorbed X-ray. Ultimate sensitivity and signal to noise ratio is obtained when each incoming photon is counted, the so-called quantum limit. Another advantage of photon counting is that one can classify the incoming photons according to their energy, and in that way realize spectral sensitivity or “color X-ray” [5] without having a penalty in dose or multiple exposures.

Pdf and presentation available for download.

Backside thinned, 1.5 e-RMS, BSI, 700fps, 1760×1760 pixels wave-front image sensor for natural and laser guide stars

The image quality of ground-bases telescopes is limited by atmospheric turbulence. In order to achieve diffraction limited imaging performance in the next generation giant telescopes, it is necessary to track the effect of atmospheric turbulence, which is seen as a disturbance the optical wave-front, at a millisecond time scale at a fine grained spatial resolution. The 1760 x 1760 pixel imager, operates at nominally 700 (up to 1000) fps, which is equivalent to a sustained pixel rate of ~3 Gpixel/s or ~30Gb/s. Pixels will be backside illuminated to reach 90% QE, have less than 3 noise electrons including the ADC. The high pixel rate forces to read out the digital data over 88 parallel LVDS channels at 210 up to 420 Mb/s.

Pdf and presentation available for download.

On Friday 17 June 2011, afternoon and evening, Caeleste organizes a “visionary” seminar to celebrate its 5th anniversary.  The topic of the seminar is “sensing and withstanding X-rays, gammas and heavy particles”. The seminar takes place at the SAS Radisson Blu, Koningin Astridplein 7 Antwerp, across the main entrance of the Antwerp Central railway station. For program and invitation: .



Caeleste opens its new website

posted by Patrick @ 17:27 PM

Caeleste is pleased to annonce the opening of its new website. We will post here our latest news about:

  • Groundbreaking detection technology
  • New CMOS circuitry for image sensing
  • Caeleste publication and patents
  • designs for space, scientific and medical imaging.

Any questions ? Comments ? Feel free to ask us.