10 - 10
No. 99MBB079A
●
PC50 (Gaussian)
The transmission characteristic is approximately -11.6dB/oct and the amplitude transmit-
tance at the cutoff length is 50%. The transmission characteristic is shown in figure below.
0.1
0.2
0.3
0.7
1
0.5
2
3
7
10
-30
5
-25
-15
-10
-5
0
-20
λ
/
λ
c
Amplitude transmittance (%)
Amplitude transmittance (dB)
Transmission characteristic of PC50 (Gaussian)
2
3
10
7
5
20
30
100
70
80
50
-x
λ
␣
•
λ
c
H (
λ
) = 1 - e
ᐉ
n2
π
(
)
2
1
Transmission characteristic :
␣
=
= 0.4697
, where
2
•
•
The use of this filter results in a simple formula of addition:
Primary profile = Roughness p Waviness profile
Therefore, the low-pass filter is characterized by:
-x
λ
␣
•
λ
c
H (
λ
) = e
(
)
Transmission characteristic :
2
Содержание 148 460
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