hsdl-3202 ETC-unknow, hsdl-3202 Datasheet - Page 13

• Manufacturer Part Number: hsdl-3202
• Description: Irda Data Power Compliant 115.2 Kb/s Infrared Transceiver
• Manufacturer: ETC-unknow

Window Design
To ensure IrDA compliance, some
constraints on the height and
width of the window exist. The
minimum dimensions ensure that
the IrDA cone angles are met
without vignetting. The
maximum dimensions minimize
the effects of stray light. The
minimum size corresponds to a
cone angle of 30 degrees, the
maximum to a cone angle of
60 degrees.
The drawing below shows the
module positioned in front of a
window.
X is the width of the window, Y is
the height of the window, and Z is
the distance from the HSDL-3202
to the back of the window. The
distance from the center of the
LED lens to the center of the
photodiode lens is 5.1 mm. The
equations for the size of the
window are as follows:
X = 5.1 +2(Z + D) tan
Y = 2(Z + D) tan
Where
for viewing. For the IrDA mini-
mum, it is 15 degrees; for the
IrDA maximum, it is 30 degrees.
(D is the depth of the LED image
inside the part, 3.17 mm). These
equations result in the following
tables and graphs:
13
Z
is the required half angle
X
Y
Minimum and Maximum Window Sizes
Dimensions are in mm.
Depth (Z)
0
1
2
3
4
5
6
7
8
9
10
Window Height Y vs. Module Depth Z
Window Width X vs. Module Depth Z
16
14
12
10
22
20
18
16
14
12
10
8
6
8
6
4
2
0
0
0
MODULE DEPTH Z – mm
MODULE DEPTH Z – mm
2
2
Y min.
1.70
2.23
2.77
3.31
3.84
4.38
4.91
5.45
5.99
6.52
7.06
4
4
ACCEPTABLE
RANGE
ACCEPTABLE
RANGE
6
6
8
8
X min.
6.80
7.33
7.87
8.41
8.94
9.48
10.01
10.55
11.09
11.62
12.16
10
10
5.97
7.12
8.28
9.43
10.59
11.74
12.90
14.05
Y max.
3.66
4.82
15.21
X max.
8.76
9.92
11.07
12.22
13.38
14.53
15.69
16.84
18.00
19.15
20.31