TC240

780-

× 488-PIXEL CCD IMAGE SENSOR

SOCS005A – OCTOBER 1985 – REVISED DECEMBER 1991

2-108

POST OFFICE BOX 655303

spurious nonuniformity specification

The spurious nonuniformity specification of the TC240 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 6. In the illuminated

condition, the nonuniformity is specified as a percentage of the total illumination as shown in Figure 7.

B

A

20 Pixels

Lines

11

15 Pixels

Lines

7

Pixels

360

Lines

233

Figure 5. Sensor Area Map