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| Slow scan CCD camera (2k, 24 μm, 16 bit) | |
TemCam-F224HD is a 2k x 2k TVIPS camera with an active area of 49 x 49 mm2. It is the perfect solution for applications in materials and life science, requiring maximum dynamic range and ultimate low dose capabilities. |
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Download product info (PDF, 5.1 MB)
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Large pixel size | |
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Fiber-optical coupling | |||||
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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. | |
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Fiber optical coupling of the electron-sensitive polycrystalline phosphor 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. This design results in a significant discrimination of single electron events which is important for low dose application. | |||||
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Optimized scintillators | |
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Near-axis flange | |||||
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TVIPS optimizes the scintillator for individual demands. Resolution and sensitivity can be customized for high tensions up to 400 kV. Two standard types are available: optimized for high resolution (HR) or for high sensitivity (HS). | |
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TVIPS has designed a special flange which combines TemCam-F415MP/F224HD with FastScan-F114NX, 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 power spectra in real-time, for the main purpose of alignment, demonstration or low dose search. | |||||
SPECIFICATIONS
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TemCam-F224HD | ||
| CCD type (architecture) | Full frame | ||
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| CCD format (pixels) | 2048 x 2048 | ||
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| CCD pixel size (μm2) | 24 x 24 | ||
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| Field of view (mm2) | 49.2 x 49.2 | ||
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| Readout rate @ digitization | 1 Mpixel/sec @ 16 bit | ||
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| Frame rate at full resolution | 0.2 (5 secs) | ||
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| Frame rate at 2 x binning | 0.6 frames/sec | ||
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| Post-magnification | 1.4 x - 1.7 x | ||
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| Electron-optical coupling | 1:1 fiber-optics | ||
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| Scintillator type | Polycrystalline phosphor | ||
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| CCD cooling | < -25˚ C, regulated | ||
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| CCD binnig factors | 1 x, 2 x, 4 x, 8 x | ||
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| Gain factors (analog) | 1 x, 2 x, 4 x | ||
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| Full well capacity (CCD electrons)* | 570 000 | ||
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| Dynamic range* | 25 000:1 (maximum/noise)** | ||
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| Non-linearity* | < 1% | ||
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| Sensitivity for primary electrons (120 kV scintillator)* | 100 counts*** | ||
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| SNR (for a single 120 keV electrons)* | > 12 | ||
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| Resolution (NTF at Nyquist freq.)* | > 22 % | ||
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| Anti-blooming | yes | ||
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| Bottom mounted | On-axis | ||
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| System requirements | Windows 2000 / XP, PCI interface | ||
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| Options | FastScan-114NX in near-axis position, motorized beam stop | ||
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| * Typical values** Estimated*** Gain 4x |
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