參數(shù)資料
型號(hào)： ADNS-2051
英文描述： Optical Mouse Sensor
中文描述： 光學(xué)鼠標(biāo)傳感器
文件頁(yè)數(shù)： 36/40頁(yè)
文件大小： 454K
代理商： ADNS-2051
36
The focus point is important and could affect the shutter value. The
graph below shows another setup with various z-height. This graph
clearly shows that the shutter value is dependent on focus distance.
0
25
50
75
100
125
150
175
200
225
250
800
600
400
200
0
S
SHUTTER VALUES (WHITE PAPER)
(
Bit
7
6
5
4
3
2
1
0
Field
S
7
S
6
S
5
S
4
S
3
S
2
S
1
S
0
Shutter_Lower
Access: Read
Address: 0x0e
Reset Value: 0x64
Bit
7
6
5
4
3
2
1
0
Field
S
15
S
14
S
13
S
12
S
11
S
10
S
9
S
8
Data Type: Sixteen bit word.
USAGE: Units are clock cycles; default value is 64. Read Shutter_Upper first,
then Shutter_Lower. They should be read consecutively. The shutter is
adjusted to keep the average and maximum pixel values within normal
operating ranges. The shutter value can be adjusted to a new value on every
frame. When the shutter adjusts, it changes by
±
1/16 of the current value.
Shown below is a graph of 250 sequentially acquired shutter values, while the
sensor was moved slowly over white paper.
Shutter_Upper
Access: Read
Address: 0x0f
Reset Value: 0x00
Note:
This graph shows average readings over different heights.
Figure 41. Typical shutter vs. Z (white paper).
3.5
1.5
-1.0
-0.8
-0.3
0
1.0
DISTANCE FROM NOMINAL FOCUS (mm)
N
-0.5
0.5
0.25
0.5
0.75
0
1.0
2.0
2.5
3.0
X
X – 3
σ
X+ 3
σ
TYPICAL SHUTTER vs. Z (WHITE PAPER)
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