Download Universal LightProbe™ Penta High Sensitivity Sensors

Data Sheet
Page 1
Universal LightProbe™ Penta High Sensitivity Sensors
This “high-sensitivity” version of our most popular sensor was designed to detect very dim LEDs in the 1 mcd
to 15 mcd range. The Penta High Sensitivity Sensor provides analog voltage outputs, and features built-in
color binning, eliminating the need to convert LED wavelength to visual color in the ATE software, and saving
valuable processing time. Best results are obtained when used with wide-aperture Universal LightProbe
Fiber-Optic Probes.
Color Response
The Universal LightProbe Penta High Sensitivity
Sensors test for the five main LED colors, plus white,
and provide an unambiguous and stable analog voltage output, independent of LED intensity, for each
color:
Blue: 1.0 volts
Green: 1.5 volts
Yellow/Amber: 2.0 volts
Orange: 2.5 volts
Red: 3.0 volts
White: 3.5 volts
Intensity Response
10
Vout
(volts)
from
the
“Int.”
pin
1
0.1
0.1
0.10.01
1
10
100
Luminous Intensity (mcd)
Typical response for T-1 3/4 diffused Green LED tested with Universal LightProbe
Penta High Sensitivity Sensor and Wide-Aperture Fiber-Optic Probe
The Universal LightProbe Penta High Sensitivity
Sensors test very dim LEDs. The sensor provides
an analog output ranging from 0 to 4 volts, corresponding to the LED’s luminous intensity in millicandelas (C.I.E. photopic-curve-corrected). The
mcd-related output is consistent with most LED
manufacturer’s specifications, eliminating the need
for any conversion. A read-out of less than 50mV
indicates under-ranging (LED too dim) and over 4.0
volts indicates over-ranging (LED too bright).The
sensor’s intensity response depends on a variety
of factors, including the size of the LED, the aperture of the fiber-optic probe, and the distance of
the probe tip from the LED emitter. The Penta High
Sensitivity Sensor will test finished-product LED
displays in the range of 1 mcd to 15 mcd. For the
test of very bright LEDs, Universal LightProbe Penta
Low-Sensitivity or Very Low Sensitivity Sensors
are available. For more information on sensitivity
response in millicandelas, please see Application
Note 35.
Supply Voltage Protection and Power Consumption
Universal LightProbe Sensors offer reliability and versatility, operating at any voltage from +5 volts to +40
volts and withstanding reverse polarity up to -18 volts without permanent damage. This provides immunity
from accidental power supply wiring mistakes and from reverse polarity up to -18 volt “spikes” due to D.C.
power line inductive switching transients as well as inadvertent reverse polarity “shorts” testers, while
permitting their operation from different D.C. supply voltages commonly encountered in industry (ie: 5, 12, or
24 volts D.C.).
©2012 Optomistic Products. All rights reserved.
U.S. PATENT
Universal LightProbe™ Penta High Sensitivty Sensors
Data Sheet
Page 2
Universal LightProbe Penta High Sensitivity Sensor
Pin-Out
Four standard wire-wrap pins are used for:
G – Ground, common 2-level wire-wrap pin for individual
analog signal output and power input ground connections
I – Intensity of LED under test
C – Color of LED under test
P – DC Power input, +5 volts to +40 volts
Sensor Characteristics
Sensor size: 0.560 inches diameter x 1.38 inches long
Operating temperature range: 0oC to 70oC
Typical response time: color-binning and intensity
outputs simultaneously in less than 1.2 seconds. (Note,
the brighter the LED, the shorter the response time)
Power consumption: apprx. 6mA with a 5-volt supply
Pairing the sensor with a wide-aperture fiber-optic probe
enables the test of LEDs as close as 0.134 inches on
center.
Fiber-optic Probes
Universal LightProbe Penta High Sensitivity Sensors are
available with a choice of Universal LightProbe Fiber-Optic
Probes (see separate catalog and guide “Which is Best for
Your Test.”) For testing extremely dim LEDs, wide-aperture
fiber-optic probes (with a diameter of 0.134 inches) are
recommended as they allow 4x the amount of light than
small aperture fiber-optic probes. This enables the test of
LEDs as close as 0.134 inches on centers. Custom probe
lengths may be ordered.
Installing the Sensor and Fiber-Optic Probe Units
Installation is achieved with one-hole fixing, using a simple
clamp for the sensor and forked clamps for the probes to
allow the height of the probes above the LEDs to be
adjusted. Four wire-wrap pins are provided on the sensor
for D.C. power and signal connections, or use the
Universal LightProbe Connector Cable for easy wiring to
the ATE (see separate data sheet).
Part number:ULP PCI/V HS - Universal LightProbe Penta High Sensitivity Sensor
Also available:ULP PCI/V:
Universal LightProbe Penta Sensor
ULP PCI/V LS: Universal LightProbe Penta Low Sensitivity Sensor
ULP PCI/V VLS: Universal LightProbe Penta Very Low Sensitivity Sensor
See Application Note 35 for more detail on sensor sensitivity ranges
The information in this data sheet is intended to be a general product description. Optomistic Products reserves the right to make changes in specifications and
characteristics at any time without notice. Unless specified otherwise, all dimensional values are nominal.
©2012 Optomistic Products. All rights reserved.
PO Box 751 • South Freeport, ME 04078 USA | Phone (207) 865-9181 • Fax (207) 865-9182
ww w. o p t o m i s t i c p r o d u c t s . c o m
U.S. PATENT