isl29003 Intersil Corporation, isl29003 Datasheet - Page 11

• Manufacturer Part Number: isl29003
• Description: Light-to-digital Output Sensor With High Sensitivity, Gain Selection, Interrupt Function And I2c Interface
• Manufacturer: Intersil Corporation

t = 1
D1
D
D
* All dimensions are in mm.
TABLE 16. RECOMMENDED DIMENSIONS FOR A FLAT
D
LENS
TOTAL
TOTAL
1.5
2.0
2.5
3.0
3.5
ISL29003
L
t
Thickness of lens
Distance between ISL29001 and inner edge of lens
Diameter of lens
Distance constraint between the ISL29001 and lens
outer edge
WINDOW DESIGN
0.50
1.00
1.50
2.00
2.50
D1
VIEWING ANGLE
D
LENS
D
2
11
2.25
3.00
3.75
4.30
5.00
>1.5mm
D
LENS
@ 35°
2.00mm
VIEWING ANGLE
FIGURE 5. WINDOW WITH LIGHT GUIDE/PIPE
D
FIGURE 6. SENSOR LOCATION DRAWING
LENS
0.29mm
LIGHT PIPE
3.75
4.75
5.75
6.75
7.75
@ 45°
1
2
3
ISL29003
0.46mm
2.10mm
Window with Light Guide Design
If a smaller window is desired while maintaining a wide
effective viewing angle of the ISL29003, a cylindrical piece of
transparent plastic is needed to trap the light and then focus
and guide the light on to the device. Hence the name light
guide or also known as light pipe. The pipe should be placed
directly on top of the device with a distance of D1 = 0.5mm
to achieve peak performance. The light pipe should have
minimum of 1.5mm in diameter to ensure that whole area of
the sensor will be exposed. See Figure 5.
6
5
4
0.56mm
D
2
D
October 8, 2007
LENS
FN7464.3