KAI-2001 datasheet(3/36 Pages) ONSEMI

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KAI−2001

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DEVICE DESCRIPTION

Architecture

Figure 2. Sensor Architecture

1600 (H) x 1200 (V)

Active Pixels

Pixel

1,1

4 Buffer Rows

2 Dark Rows

Dual

Video L

Video R

1600

Single

800

Output

4 Buffer Rows

4 Dark Rows

There are 2 light shielded rows followed 1,208

photoactive rows and finally 4 more light shielded rows.

The first 4 and the last 4 photoactive rows are buffer rows

giving a total of 1,200 lines of image data.

In the single output mode all pixels are clocked out of the

Video L output in the lower left corner of the sensor. The first

4 empty pixels of each line do not receive charge from the

vertical shift register. The next 16 pixels receive charge from

the left light shielded edge followed by 1,608 photosensitive

pixels and finally 16 more light shielded pixels from the

right edge of the sensor. The first and last 4 photosensitive

pixels are buffer pixels giving a total of 1,600 pixels of

image data.

In the dual output mode the clocking of the right half of the

horizontal CCD is reversed. The left half of the image is

clocked out Video L and the right half of the image is clocked

out Video R. Each row consists of 4 empty pixels followed

by 16 light shielded pixels followed by 800 photosensitive

pixels. When reconstructing the image, data from Video R

will have to be reversed in a line buffer and appended to the

Video L data.

There are 4 dark reference rows at the top and 2 dark rows

at the bottom of the image sensor. The dark rows are not

entirely dark and so should not be used for a dark reference

level. Use the 16 dark columns on the left or right side of the

image sensor as a dark reference.

Of the 16 dark columns, the first and last dark columns

should not be used for determining the zero signal level.

Some light does leak into the first and last dark columns.

Only use the center 14 columns of the 16 column dark

reference.

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