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| NanoGage Proximity Sensor |
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| NanoGrid Planar Encoder |
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| NanoScale Linear Encoder |
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OPTRA
is proud to offer its line of encoder-based optical position sensors
for a variety of metrology and servo-positioning applications.
These sensors offer resolution and repeatability at the nanometer
level, and are easy to install and to use. We manufacture sensors for a
broad range of applications and industries, and offers customized versions of all our sensors and encoders.
With the use of near-IR laser diodes and dichroic beam splitters
that allow for complete separations between wavelengths of the light
used for auto-focusing and imaging, OPTRA has developed a
through-the-lens auto focus technique.
OPTRA's linear and planar encoder products, which include
state-of-the-art processing electronics for either parallel or A quad B
outputs, can be used in your most demanding positioning and measurement
applications. From custom
encoder grids to application-specific sensors, OPTRA can provide
cost-effective solutions to your most demanding sensing problems.
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NanoGage Proximity Sensor
The NanoGage 100 is an optical
triangulation proximity sensor with a high signal-to-noise ratio,
offering signal resolution down to 10nm. Unlike capacitance proximity
sensors, which the NanoGage has been designed to replace, the sensor is
insensitive to electromagnetic interference.
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NanoGage Specifications (typical)
| Position Resolution |
15nm RMS @ 100kHz
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Linear Measurement Range
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100µm
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Measurement Repeatability
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Better than 75nm
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Surface Reflectivity for Full Resolution
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≥ 4% (specular)
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Sensor Head Standoff
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3mm |
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| NanoGage Proximity Sensor |
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NanoGrid Planar Encoder
The OPTRA
NanoGrid is an XY metrology system that measures the position of the
sensor head relative to an encoder grid with resolution and
repeatability up to the nanometer level. Unlike laser interferometers,
the NanoGrid is insensitive to air turbulence and is able to provide
extraordinary repeatability in real working enviroments.
The
NanoGrid Planar Encoder allows both X and Y position measurements to be
made at a single point, using a single laser diode sensing beam. The
relatively large physical separation between the sensor head and the
encoder simplifies installation.
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NanoGrid Specifications (typical)
Encoder Size
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Up to 400mm X 400mm |
Encoder Speed
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Up to 4 m/sec
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Accuracy
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< 1µm
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Repeatability
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< 5nm
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Size Head Size
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23.5 X 47.0 X 60.5mm
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| NanoGrid Planar Encoder |
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NanoScale Linear Encoder
NanoScale
is a laser diode-based linear incremental encoder that can measure
position relative to a scale with laser interferometer-level resolution
and repeatability. However, the NanoScale suffers from none of the
instability problems; such as drift, sensitivity to air turbulence, and
length of optical path; that are normally associated with lasers. With
its compact size, the NanoScale can be easily retrofitted to existing
stages and mechanics for the ultimate upgrade in positioning
performance.
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| NanoScale Linear Encoder |
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NanoMetrology Accessories
OPTRA offers a full line of accessories to complement our line of
products, including diagnostic, mounting and isolation tools.
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Auto Focus
A
key requirement for economical drug testing is high throughput, and a
principal impediment to high throughput is the need to refocus the
microscope for every sample that is examined. Conventional auto focus
techniques rely on image analysis and are just too slow to handle high
sample throughputs that are being sought in today's drug testing
environment. With the use of near-IR laser diodes and dichroic beam
splitters that allow for complete separations between wavelengths of
the light used for auto focusing and imaging, OPTRA
developed a through-the lens auto focus technique.
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