參數(shù)資料
型號: KAI-2001-AAA-CF-BA
廠商: KODAK IMAGE SENSOR SOLUTIONS
元件分類: CCD Image Sensor
英文描述: IMAGE SENSOR-CCD, 1600(H) X 1200(V) PIXEL, RECTANGULAR, THROUGH HOLE MOUNT
封裝: CERAMIC, DIP-32
文件頁數(shù): 16/48頁
文件大?。?/td> 2270K
代理商: KAI-2001-AAA-CF-BA
7. Bright field defect test
This test is performed with the imager illuminated to a level such that the output is at 80% of saturation (approximately
32,000 electrons). Prior to this test being performed the substrate voltage has been set such that the charge capacity
of the sensor is 40,000 electrons. The average signal level of all active pixels is found. The bright and dark thresholds
are set as:
Dark defect threshold
= Active Area Signal * threshold
Bright defect threshold = Active Area Signal * threshold
The sensor is then partitioned into 192 sub regions of interest, each of which is 100 by 100 pixels in size. See Figure
15: Test Sub Regions of Interest. In each region of interest, the average value of all pixels is found. For each region of
interest, a pixel is marked defective if it is greater than or equal to the median value of that region of interest plus the
bright threshold specified or if it is less than or equal to the median value of that region of interest minus the dark
threshold specified.
Example for major bright field defective pixels:
Average value of all active pixels is found to be 416 mV (32,000 electrons).
416mV * 15% = 62.4 mV
Bright defect threshold:
416mV * 15% = 62.4 mV
Region of interest #1 selected. This region of interest is pixels 1,1 to pixels 100,100.
o
Median of this region of interest is found to be 416 mV.
o
Any pixel in this region of interest that is >= (416+62.4 mV) 478.4 mV in intensity will be marked
defective.
o
Any pixel in this region of interest that is <= (416-62.4 mV) 353.6 mV in intensity will be marked
defective.
All remaining 191 sub regions of interest are analyzed for defective pixels in the same manner.
Test Sub Regions of Interest
Pixel
(1,1)
Pixel
(1600,1200)
1
2
3
4
5
6
7
8
9
10
17
18
19
20
21
22
23
24
25
26
33
34
35
36
37
38
39
40
41
42
49
50
51
52
53
54
55
56
57
58
65
66
67
68
69
70
71
72
73
74
81
82
83
84
85
86
87
88
89
90
97
98
99
100
101
102
103
104
105
106
113
114
115
116
117
118
119
120
121
122
129
130
131
132
133
134
135
136
137
138
11
12
13
14
15
16
27
28
29
30
31
32
43
44
45
46
47
48
59
60
61
62
63
64
75
76
77
78
79
80
91
92
93
94
95
96
107
108
109
110
111
112
123
124
125
126
127
128
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
Figure 15: Test Sub Regions of Interest
Eastman Kodak Company, 2006
www.kodak.com/go/imagers
Revision 2.0 MTD/PS-0609 p23
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