RPM7238-R series

Photo Link Module

Rev.B

3/6

(2) Standard transmitter

Fig.2 Measurement of standard transmitter proofreading

Standard transmitter

R

20cm

λ peak=940nm

λ=40nm

RPM-302B

∆

When standard transmitter output the signal at Fig.1 standard photodiode output become io=5

µAp-p under the

measurement condition Fig.2.

(The radiant intensity of standard transmitter : 50mW / sr)

RPM-302B : standard photodiode has short current Isc=27

µA at Ee=1000(lx)

(using CIE standard light source A)

(3) Measurement effective distance, horizontal & vertical half angle

Fig.3 Measurement condition for effective distance

RPM7238-R series

Light detector face

illuminance : Ee

Effective distance : L

(

θ ; Indicates horizontal and vertical directions)

θ

θ

Standard transmitter

Effective distance L : Effective distance at

θ=0° Fig.3

Horizontal & vertical half angle θ: The angle which effective distance became 50% of L.