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RPM6900 series
Photo Link Module
(2) Standard transmitter
λ peak=940nm
λ ? =40nm
Signal scale
io=5 μ Ap-p
Lo=20cm
i
Carrier frequency fo
Brachy morphic wave duty50%
io
Standard transmitter
A
10k ?
Standard photo-diode
io
ON
OFF
t
RPM-301B
Fig.2 Measurement of standard transmitter proofreading
600 μ s 600 μ s
Fig.3 Standard photo diode current
When standard transmitter output the signal at Fig.1 standard photodiode output become io=5 μ Ap-p (Fig.3) under the
measurement condition Fig.2.
(The radiant intensity of standard transmitter : 50mW / sr)
RPM-301B : standard photodiode has short current Isc=27 μ A at E=1000(lx)
(using CIE standard light source A)
(3) Measurement effective distance, horizontal & vertical half angle
RPM6900 series
θ
θ
Standard transmitter
Light detector face
illuminance : Ee
Effective distance : L
( θ ; Indicates horizontal and vertical directions)
Fig.4 Measurement condition for effective distance
Effective distance L
Horizontal & vertical half angle θ
: Effective distance at θ =0 ° Fig.4
: The angle which effective distance became 50% of L.
3/7
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