Read about two of our successful
Laser-based Measurement Technique
Multi-Point In-Situ Profiling of Large Aspherics
Model 100 and 200
The Model 100 and the enhanced Model 200 Profilometers are uniquely
capable of measuring mid-scale, or mid-spatial frequency surface errors -
those with typical widths ranging from a fraction of a millimeter to a few
tens of millimeters. These profilometers work on the innovative, patented
principal of measuring local surface curvature. This completely
self-referencing technique gives remarkable insensitivity to all types of
vibration and mechanical and thermal drift, giving Angstrom-level accuracy
without requiring precise reference surfaces or translation mechanisms. In
addition to providing standard surface quality measures such as RMS, RA,
and Peak-to-Valley, the profilometers allow a full range of analysis
options, including polynomial removal and the calculation of Power
Spectral Density (PSD) and autocovariance function.
These instruments are suitable for the profiling of aspheric and
anamorphic optical surfaces, as exemplified by NASA's use of a Model 200
to measure the Hubble Space Telescope corrective
optics. The Model 200
received the 1992 Photonics Spectra Circle of Excellence Award.
Laser and detector boards
The opto-electronic heart of the Model 100 and Model 200
profilometers consists of a modulated laser diode source
board and an ultra-stable four quadrant detector board.
The latest generation of these boards interface with a
pc-resident card to form a complete computer controlled
source and detector system. Bauer offers these components as OEM devices for applications requiring
ultra-precision beam centroiding or tracking.
I-QUAD-4A Four Channel True Current
Mode Servo Amplifier
Bauer introduces a new, four-channel current mode output
DC servo motor amplifier. Unlike other designs available
in the marketplace, this amplifier operates in a pure class
B current mode output, using internal local feedback to
achieve the current-mode performance without depending
on feedback sensed directly from the output line. This new
amplifier represents a "ground-up" design specifically for
the purpose of driving DC servo motors, rather than the far
more common approach of adapting audio amplifier
designs for servo applications.