SVS-Vistek eco4050TR, Manual

Page: 54 / 142

SVS-VISTEK
Feature-Set 54
Figure 52: Figure of 1 Tap
In a single-tap CCD sensor the readout of pixel charge is done sequentially.
Pixel by pixel, line by line. The maximum frame rate is determined by the
pixel clock frequency and the total number of pixels to be read out.
Figure 53: Illustration of 1 tap
Dual-Tap
Figure 54: Figure of 2 taps
In a dual-tap CCDs, (CCD with two outputs) the readout of pixel charge
takes place in a serial/parallel sequence. Each line is divided in half and the
pixels of both halves are read out simultaneously, line by line. For a given
pixel clock frequency, only half the time is required to read out the entire
array, resulting in twice the framerate.
Figure 55: Illustration of 2 taps
Quad-Tap
Figure 56: Figure of 4 taps
Quad-tap CCDs (CCD with four outputs) the read out of pixels is four times
faster than in a “regular” sensor.
Figure 57: Illustration of 4 tap