OCB100-KIT Optek, OCB100-KIT Datasheet - Page 14

• Manufacturer Part Number: OCB100-KIT
• Description: Optical Sensor Development Tools Sensor Design Kit Trans, Reflec, Fluid
• Manufacturer: Optek

Specifications of OCB100-KIT

• Description/function: Design Kit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

THEORY OF OPERATION OPB885Z / OPB885CZ
The OPB885Z is a wide gap slotted (transmissive) switch with a
single mounting tab on the phototransistor side of the assembly.
Current forced through the LED provides a light signal with a center
wavelength of 890nm directed across the open gap of the switch
toward the phototransistor sensor. The Ic
collector current of the
(ON)
phototransistor is dependent on the amount of light striking it. When
a non-transparent target passes through the gap, the amount of col-
lector current is lowered significantly. The three graphs on the follow-
ing page show the effect of an opaque target passing next to the LED
tower, next to the phototransistor tower, and in the center of the slot.
Analysis of these graphs shows a narrower signal area next to both
14
towers. This effect is due to the beam angle and acceptance angle
of the LED and phototransistor of about 40° and the presence of a
.05”[1.27mm] wide aperture in front of each component.
OCB100-KIT