Slow scan CCD camera (2k, 24 μm, 16 bit)

TemCam-F224HD is a 2k x 2k TVIPS camera with an active area of 49 mm x 49 mm. It is the perfect solution for applications in material science and biology, requiring maximum dynamic range and ultimate low dose capabilities.

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  Large pixel size
    Fiber optical coupling
  The active pixel area of a 24 μm pixel is 2.9 x larger than a 14 μm pixel resulting in a higher full well capacity of the CCD chip and hence extending the dynamic range. Also, the resolution of a 24 μm pixel camera is improved in comparison to a 14 μm pixel camera with the same number of pixels.     Fiber optical coupling of the electronsensitive layer (scintillator) with the CCD sensor increases the amount of light collected in comparison with lens-optical coupling and, as a result, the sensitivity of the camera.

 

  Optimized scintillators
    Near-axis flange
  TVIPS optimizes the scintillator for individual demands. Resolution and sensitivity can be customized for high tensions from 100 to 400 kV. Two standard types are available: optimized for high resolution (HR) or for high sensitivity (HS).     TVIPS has designed a special flange which combines TemCam-F224HD with FastScan-114NX, a high quality fiber-optically coupled CCD camera operating at video rate. Due to disadvantages of side-mounted cameras this is an interesting option to monitor the TEM image and its FFT in realtime, for the main purpose of alignment, demonstration or low dose search.

 

 
SPECIFICATIONS
TemCam-F224HD  
  CCD type (architecture) Full frame  
  CCD format (pixels) 2048 x 2048  
  CCD pixel size (μm) 24 x 24  
  Field of view (mm) 49.2 x 49.2  
  Readout rate @ digitization 1 Mpixel @ 16 bit  
  Frame rate at full resolution 0.2 (5 secs)  
  Frame rate at 2 x binning 0.6 frames/sec  
  Post-magnification 1.4 x - 1.7 x  
  Electron-optical coupling 1:1 fiber-optics  
  Scintillator type Polycrystalline phosphor  
  CCD cooling < -25˚ C, regulated  
  CCD binnig factors 1 x, 2 x, 4 x, 8 x  
  Gain factors (analog) 1 x, 2 x, 4 x  
  Full well capacity (CCD electrons)* 570 000  
  Dynamic range* 25 000:1 (maximum/noise)**  
  Non-linearity* < 1%  
  Sensitivity for primary electrons (120 kV scintillator)* 100 counts***  
  SNR (for a single 120 keV electrons)* > 12  
  Resolution (NTF at Nyquist freq.)* > 22 %  
  Anti-blooming yes  
  Bottom mounted On-axis  
  System requirements Windows 2000 / XP, PCI interface  
  Options FastScan-114NX in near-axis position, motorized beam stop  
  * Typical values** Estimated*** Gain 4x