GP1A70R Datasheet, PDF (6/6 Pages) Sharp Electrionic Components – OPIC Photointerrupter with Encoder Functions

Fig.12-a Phase Difference vs. Distance
( Z direction )
(GP1A70R )
120
V_CC = 5V
I_F= 20mA
110
f= 2.5kHz
T_a= 25˚C
100
θ _AB1 =
t_AB1
t_AP
x 360˚
90
80
Z(
Detecting side)
OPIC ^Disk
70
GP1A70R
(Emitting side)
60
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
Distance Z ( mm ) ( Shifting encoder)
<Measurement Conditions>
6˚
3˚
R10.89
( Unit : mm )
R_O
X
GP1A70R
X'
R13.24
Disk center
13
6
GP1A70R/GP1A71R
Fig.12-b Phase Difference vs. Distance
( Z direction )
(GP1A71R )
140
V_CC = 5V
I_F= 20mA
130
f= 2.5kHz
θ_AB1 =
t_AB1
t_AP
x 360˚
T_a= 25˚C
120
110
100
90
80
0
(Detecting side )
Z
OPIC ^Disk
GP1A71R
(Emitting side )
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
Distance Z ( mm ) ( Shifting encoder)
X
R15.8
Disk center
3˚
1.5 ˚
R13.45
R_O
GP1A71R
X'
13
6
8.625
4
S
11.185
4
S
< GP1A70R Basic Design>
R_O (distance between the disk center and half point of
a slit ) and S (installing position of GP1A70R) will be
provided by the following equations.
< GP1A71R Basic Design>
R_O (distance between the disk center and half point of
a slit ) and S (installing position of GP1A71R) will be
provided by the following equations.
R_O=N/60 x 10.89 (mm ) N : number of slits
S= R_O- 2.265 (mm)
R_O= N/120 x 13.45 (mm) N : number of slits
S= R_O- 2.265(mm)
s Precautions for Use
( 1) This device is designed to be used under the condition of I_F = 20mA
( 2) It is recommended that a by-pass capacitor of more than 0.01µF be added
between V CC and GND near the device in order to stabilize power supply line.
( 3) As for other general cautions, refer to the chapter “ Precautions for Use” .