TC244A

786-

× 488-PIXEL CCD IMAGE SENSOR

SOCS056 – JUNE 1996

9

POST OFFICE BOX 655303

mV

Amplitude

t

Illumination

% of Total

t

Figure 8. Pixel-Nonuniformity,

Figure 9. Pixel-Nonuniformity,

Dark Condition

Illuminated Condition

The grade specification for the TC244A is as follows (CCD video-output signal is 50 mV

±10 mV):

Pixel-nonuniformity:

DARK CONDITION

ILLUMINATED CONDITION

DISTANCE

PART

NONUNIFORM PIXEL TYPE

TOTAL

SEPARATION

PART

NUMBER

PIXEL

AMPLITUDE x

WHITE

BLACK

W/B†

% OF TOTAL

AREA A

AREA B

TOTAL

COUNT‡

NUMBER

AMPLITUDE, x

(mV)

AREA

AREA

AREA

ILLUMINATION

AREA A

AREA B

COUNT‡

X

Y

AREA

()

A

B

A

B

A

B

TC244A-2

0

x > 3.5

0

0

0

0

0

0

x > 5

0

0

—

—

—

—

TC244A-3

2.5 < x

≤ 3.5

2

5

2

5

2

5

5.0 < x

≤ 7.5

2

5

12

100

80

A

0

x > 3.5

0

0

0

0

0

0

x > 7.5

0

0

12

100

80

A

TC244A-4

3.5 < x

≤ 7

3

7

3

7

3

7

7.5 < x

≤ 15

3

7

15

0

x > 7

0

0

0

0

0

0

x > 15

0

0

15

—

—

—

† White and black nonuniform pixel pair

‡ The total spot count is the sum of all nonuniform white, black, and white/black pairs in the dark condition added to the number of nonuniform black

pixels in the illuminated condition. The sum of all nonuniform combinations do not exceed the total count.

Column nonuniformity:

PART

COLUMN

AMPLITUDE x

WHITE

BLACK

PART

NUMBER

AMPLITUDE, x

(mV)

AREAS

AREAS

NUMBER

(mV)

A AND B

A AND B

TC244A-2

0

x > 0.3

0

0

TC244A-3

0

x > 0.5

0

0

TC244A-4

0

x > 0.7

0

0