TC245

786-

× 488-PIXEL CCD IMAGE SENSOR

SOCS019A – DECEMBER 1991

2-9

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 TC245 is as follows (CCD video-output signal is 50 mV

±10 mV):

Pixel nonuniformity:

PART

DARK CONDITION

ILLUMINATED CONDITION

TOTAL

DISTANCE

PART

PIXEL

NONUNIFORM PIXEL TYPE

%OFTOTAL

AREA A

AREA B

TOTAL

DISTANCE

SEPARATION

PART

NUMBER

PIXEL

AMPLITUDE x

WHITE

BLACK

W/B†

% OF TOTAL

AREA A

AREA B

TOTAL

COUNT‡

X

Y

AREA

NUMBER

AMPLITUDE, x

(mV)

AREA

AREA

AREA

ILLUMINATION

AREA A

AREA B

COUNT‡

X

Y

AREA

(mV)

A

B

A

B

A

B

TC245-20

x > 3.5

0

0

0

0

0

0

x > 5

0

0

—

—

—

—

TC245-30

2.5 < x

≤ 3.5

2

5

2

5

2

5

5.0 < x

≤ 7.5

2

5

12

100

80

A

TC245-30

x > 3.5

0

0

0

0

0

0

x > 7.5

0

0

12

100

80

A

TC245-40

3.5 < x

≤ 7

3

7

3

7

3

7

7.5 < x

≤ 15

3

7

15

—

—

—

TC245-40

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 will not exceed the total count.

Column nonuniformity:

PART

COLUMN

AMPLITUDE x

WHITE

BLACK

PART

NUMBER

AMPLITUDE, x

(mV)

AREAS

AREAS

NUMBER

(mV)

AREAS

A AND B

AREAS

A AND B

TC245-20

x > 0.3

0

0

TC245-30

x > 0.5

0

0

TC245-40

x > 0.7

0

0