TC241 Datasheet, PDF (8/18 Pages) Texas Instruments – 780- × 488-pixel ccd image sensor

TC241
780- × 488-PIXEL CCD IMAGE SENSOR
SOCS006C – AUGUST 1986 – REVISED DECEMBER 1991
spurious-nonuniformity specification
The spurious-nonuniformity specification of the TC241 CCD grades – 10, – 20, – 30, and – 40 is based on several
sensor characteristics:
• Amplitude of the nonuniform pixel
• Polarity of the nonuniform pixel
– Black
– White
• Location of the nonuniformity (see Figure 5)
– 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
• Nonuniform pixel count
• Distance between nonuniform pixels
• Column amplitude
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.
15 Pixels
11
Lines
233
Lines
360
Pixels
A
7
Lines
B
20 Pixels
Figure 5. Sensor-Area Map
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