Innovators in Metrology

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Read about two of our successful development programs-

Laser-based Measurement Technique for Optical

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.

  Complete Specification 

(pdf format)

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Last modified: March 30, 2012

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