AMIS-710324 Datasheet, PDF (6/9 Pages) AMI SEMICONDUCTOR – 300dpi CIS Module

AMIS-710324-A4: 300dpi CIS Module
Data Sheet
9.0 MTF Graph and its Discussion
Figure 4 depicts MTF versus Distance. This graph essentially shows the working depth of focus. Since this module is a 300dpi module,
with a pixel density of 300 pixels per inch, the MTF was measured with a 150dpi or a 75 line-pair per inch optical bar pattern. The tests
were conducted at a pixel rate of 2.5MHz.
TYPICAL MTF VERSUS DEPTH OF FOCUS
60
50
40
30
20
10
0
0
0.1
0.2
0.3
0.4
0.5
0.6
DEPTH FROM THE WINDOW SURFACE(mm)
Figure 4: MTF versus Distance
The effective algorithm used in the measurements is as described by the following equation:
MTF={[Vp(n)+Vp(n+1)]/2-[Vp(n+2)+Vp(n+3)]/2}/{[Vp(n)+Vp(n+1)]/2+[Vp(n+2)+Vp(n+3)]/2}
Where n is 1, 2, .....2592^th, Vp(n) is the signal amplitude of the n^th pixel.
AMI Semiconductor – Jun. 06, M-20564-001
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