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Technical Supplement [ FIT CCD ]
When you shoot object with intense spot light, you may recognize white vertical line appear on above/below it. Such a phenomenon is known as SMEAR from which you can not evade as long as adapting solid state for pick up device instead of vacuum tube. How is SMEAR caused in Charge Coupled Device (CCD) which is most popular solid state pick up device ? The light leaking from PHOTO DIODE (PD) or crossing over it yields electrical carriers below PD (inside of Silicon chip). The carriers which are aroused in Silicon chip below PD diffuse into Vertical CCD shift register (V-CCD). Thus the carriers diffused into V-CCD cause SMEAR that white tailing band/line above/below bright part as shown in Fig. 1). The brighter the light is, the easier SMEAR appears. As a matter of course, it deteriorates the quality of picture image.
IT CCD, FIT CCD :
How does anti SMEAR come ? Frame Interline Transfer (FIT) CCD is noted as the most suitable one. FIT CCD is distinctive as ...