Readout speed

Readout speed for a typical CCD camera is somewhere between 100 kpixel s 1 and 5 Mpixel s-1. Cameras with up to 4 Mpixel chips have been built. How-... 

Binning CCD are versatile devices and their readout pattern can be manipulated to achieve various effects. Binning allows charges from adjacent pixels to be combined and thus can offer benefits in faster readout speeds and improved signal to noise ratios albeit at the expense of a reduced special resolution. Binning also increases sensitivity for quantitation and imaging at very low light levels. 

CID devices such as the General Electric RA-128 can also be fabricated to provide random addressing of the array. With this capability only the desired pixels need be interrogated instead of sequentially scanning through the whole array as is required in most other solid-state devices. Therefore, faster readout speeds are possible for rapid analysis. 

Fig. 6.17. Series-parallel scan IR CID with one preamplifier per column. All the columns are read out simultaneously. This lowers the readout speed and avoids the column select switches shown in Fig. 6.13...

Readout speed Speed at which the data of the entire chip are read out. 1 MHZ, equals 1.4 sec for the readout of a full size image... 

In SBCMs, the emitted fight is detected by photomultiplier tubes (PMTs) that read out intensities over time. Spatial information is not perceived. The image is reconstituted by plotting the intensity value of a certain time-point to the corresponding x-y-position of the scanning beam. MBCMs use a two-dimensional detector (a CCD camera) to record the intensity and spatial position of all minibeams simultaneously (Fig. IB). The frame rate is defined by the camera exposure time and the frame readout speed of the camera. Maximally it can go up to 1/12 of the rotation frequency of the spiiming disk (i.e. 360 fjps in case of the CSU-10). 

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