KAI-4021 datasheet(33/56 Pages) ONSEMI

33 / 56 page

KAI-4021 Image Sensor

www.truesenseimaging.com

Revision 1.1 PS-0014 Pg 33

Non-Summed Interlaced Scan

Figure 23: Non- Summed Interlaced Scan Operation

In the non-summed interlaced scan mode only half the photodiode are read out in each field. In the even field rows 0,

2, 4, … are transferred to the VCCD. In the odd field rows 1, 3, 5, … are transferred to the VCCD. When the charge

packet is transferred from a photodiode is occupies the equivalent of two rows in progressive scan mode. This allows

the VCCD to hold twice as much charge a progressive scan mode. However, since only one photodiode for each row is

transferred to the VCCD the maximum usable signal is still only 40,000 electrons. The large extra capacity of the VCCD

causes the anti-blooming protection to be increased dramatically compared to the progressive scan. The vertical MTF is

the same between the non-summed interlaced scan and progressive scan. There will be motion related artifacts in the

images read out in the interlaced modes because the two fields are acquired at different times.

Figure 24: Non- Summed Interlaced Scan Flow Chart

odd field

even field

Non-Summed

Interlaced Even

Frame

Timing

Interlaced Line

Timing

Repeat for

1037 Lines

Non-Summed

Interlaced Odd

Frame

Timing

Interlaced Line

Timing

Repeat for

1037 Lines

KAI-4021 Datasheet(PDF) 33 Page - ON Semiconductor