CCD chip
The highly sensitive CCD chip used in the Veleta provides maximum resolution of 2048 x 2048 pixels with a 14-bit dynamic range. In conjunction with further dark-current-reduction measures, this increases the detection efficiency of the entire camera system tremendously. The CCD sensor possesses a uniquely high quantum efficiency, which in combination with reduced dark current results in a tremendous increase of the total digital quantum efficiency (DQE) of the camera system.
High frame rates
The Veleta supports frame rates of more than 10 images per second at 2x binning and of 5 images per second at full resolution. This high frame rate is ideal for locating suitable sample segments directly onscreen. In conjunction with the RTFFT (Real Time Fast Fourier Transformation), the focusing mode offers ideal assistance for setting various microscope parameters. This enables you to conveniently focus your sample on your PC screen as opposed to having to use the viewing screen of the microscope. No matter what mode you select, the Veleta offers an excellent dynamic range and high sensitivity.
Special objective
In a partnership with lens makers of the highest caliber the Veleta camera system is equipped with a new specially designed objective lens. In conjunction with the new CCD chip and even more efficient scintillators, the tuned-up optics of the Veleta system ensures much greater sensitivity and light efficiency, as well as a signal-to-noise ratio higher than ever before.
Variable exposure times
The interline transfer chip uses an electronic shutter. This neatly sidesteps any possible mechanical problems. The Veleta offers exposure times ranging from 1 ms to 100 seconds. This is a fundamental prerequisite for being able to acquire images of either intense illumination or of very low intensity.
High sensitivity
The high sensitivity of Veleta allows the observation of samples on the monitor at beam intensities so low that it would normally prohibit the user from seeing anything on the TEM viewing screen.
Anti-Blooming / Diffraction
The CCD chip's interline-transfer architecture guarantees extremely high anti-blooming. Individual pixels are clearly distinguished. This, in conjunction with extremely short exposure times, optimizes the acquisition of diffraction images.
FireWire™ technology
Data is transferred from the camera to the PC via a FireWire™ (IEEE1394) interface. This technology makes it possible to install the Veleta on any ordinary PC or laptop equipped with a FireWire™ port. No additional special frame grabber is necessary.
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