RPM6900 series

Photo Link Module

3/7

(2) Standard transmitter

Fig.2 Measurement of standard transmitter proofreading

Fig.3 Standard photo diode current

Standard transmitter

Lo=20cm

io

io

i

t

10k

Ω

io=5

µAp-p

λ peak=940nm

λ ∆=40nm

Standard photo-diode

RPM-301B

A

Signal scale

Carrier frequency fo

Brachy morphic wave duty50%

ON

600

µs 600µs

OFF

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

µAp-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

µA at E=1000(lx)

(using CIE standard light source A)

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

Fig.4 Measurement condition for effective distance

RPM6900 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.4

Horizontal & vertical half angle

θ

: The angle which effective distance became 50% of L.