RPM7238-R series
Photo Link Module
(2) Standard transmitter
λ peak=940nm
? λ =40nm
Standard transmitter
20cm
RPM-302B
R
io=V OUT / R
V OUT
Fig.2 Measurement of standard transmitter proofreading
When standard transmitter output the signal at Fig.1 standard photodiode output become io=5 μ Ap-p under the
measurement condition Fig.2.
(The radiant intensity of standard transmitter : 50mW / sr)
RPM-302B : standard photodiode has short current Isc=27 μ A at Ee=1000(lx)
(using CIE standard light source A)
(3) Measurement effective distance, horizontal & vertical half angle
RPM7238-R series
θ
θ
Standard transmitter
Light detector face
illuminance : Ee
Effective distance : L
( θ ; Indicates horizontal and vertical directions)
Fig.3 Measurement condition for effective distance
Effective distance L : Effective distance at θ =0 ° Fig.3
Horizontal & vertical half angle θ : The angle which effective distance became 50% of L.
Rev.B
3/6
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