TC245

786-

× 488-PIXEL CCD IMAGE SENSOR

SOCS019A – DECEMBER 1991

2-8

POST OFFICE BOX 655303

spurious nonuniformity specification

The spurious nonuniformity specification of the TC245 CCD grades – 10, – 20, – 30, and – 40 is based on several

sensor characteristics:

–

Black

–

White

–

Area A

–

Element columns near horizontal center of the area

–

Element rows near vertical center of the area

–

Area B

–

Up to the pixel or line border

–

Up to area A

–

Other

–

Edge of the imager

–

Up to area B

The CCD sensors are characterized in both an illuminated condition and a dark condition. In the dark condition,

the nonuniformity is specified in terms of absolute amplitude as shown in Figure 8. In the illuminated condition,

the nonuniformity is specified as a percentage of the total illumination as shown in Figure 9.

B

A

20 Pixels

11

Lines

18 Pixels

Lines

7

377

Pixels

233

Lines

Figure 7. Sensor Area Map