MODEL 301DIV
SIGNAL CONDITIONING AMPLIFIER
The Model 301DIV amplifier
module is a member of UDT’s
growing family of conditioning
amplifiers. It interfaces position-
sensing photodetectors with
indicators and controls supplied by
the user.
This versatile system is
used with bi-cells and quadrant
detectors for nulling and centering
operations, or with lateral-effect
detectors for continuous position
measurement. It can also be used
to normalize the differential output
of two discrete-element detectors.
The Model 301DIV
provides transimpedance
amplifiers to condition the detector
signals, as well as the differential
amplifiers necessary to generate a
position-related analog output.
Two modules are required when
monitoring both axes of quadrant
or lateral-effect detectors. With
dual-axis systems, the Model 1000
electronic collimator is available for
measuring very small changes in
angular displacement.
In addition to measuring
differential output to determine
position, the system also divides
by the summed output in order to
cancel the effects of variations in
incident light intensity during
measurement.
The amplifier module’s six
selectable input ranges
accommodate detector signals
ranging from 3 µA to 2 mA. LED
indicators help users select the
proper range setting. Output
signals are normalized to 10V
maximum, user adjustable.
The standard Model
301DIV has a frequency range of
DC to 5 kHz. A 30 kHz version is
also available for high-speed
applications.
COMPLETE DETECTOR/
CABLE ASSEMBLIES.
For ease of installation and
accuracy of measurement, UDT
offers detector/cable assemblies
which ensure proper
interconnection between
photodetector and amplifier pins.
UDT photodetectors are
selected for high responsivity, low
noise, long-term stability,
uniformity, and linearity over a
wide dynamic range.
OTHER FAMILY MEMBERS
The Model 431 is a dual-channel
amplifier that provides a digital
display of X and Y positions. And
the Op-Eye series of multi-channel
computer interfaces provide cost-
effective conditioning of optical
sensors for use with popular
computers. Op-Eye systems can
accommodate up to 4 dual-axis
detectors, 8 single-axis detectors,
16 discrete sensors, or any
combination thereof. Systems are
available for Apple II and IBM
personal computers and their
compatibles, any computer having
an RS-232C or IEEE-488 port, and
computers that have an internal
A/D converter.
APPLICATIONS
Applications are many and varied.
UDT remote position-sensing
sensors are used in centering and
nulling operations measurement of
position of robotics and other
production equipment, alignment
of machine tools, measurement of
the curvature of optical surfaces,
and laser alignment.
Simplified Block Diagram
of 301DIV
UDT Instruments • 8581 Aero Drive • San Diego, CA 92123
Phone (858) 279-8035 Fax (858) 576-9286
