Grid Encoder features contamination-resistant design.

Press Release Summary:

Suited for use with NanoGrid® system, contamination-resistant grid encoder allows for operation of position measurement systems in less than clean room environments. All grid elements are electrically connected, enabling entire grid surface to be set at fixed electrical potential to eliminate static electricity as well as inhibit particle accumulation. Product offers 3 user-selectable standard data interfaces for motion controller compatibility.

Original Press Release:

OPTRA, Inc. Announces Availability of Contamination-Resistant Grid Encoder

Topsfield, MA (February 24, 2006) - OPTRA, Inc. announces the availability of a new contamination-resistant grid encoder for use with the NanoGrid® system. Because all grid elements are electrically connected, the entire grid surface can be set at a fixed electrical potential, thus eliminating static electricity and inhibiting particle accumulation.

The encoder grid is an integral part of OPTRA's ultra-precise position measurement systems. These systems use laser diffraction principles to encode the position of a glass scale or grid relative to a sensor head with sub-nanometer resolution. All optical encoders lose accuracy when the incident laser light is interrupted by contamination on the grid surface. OPTRA's new product resists the accumulation of particles, allowing for operation in a less-than-clean room environment.

The OPTRA NanoGrid offers three user-selectable standard data interfaces (32-bit parallel word, PCI-bus and serial A-quad-B) making it compatible with all popular motion controllers. The software drivers include a simple GUI which ensures fast and reliable set-up and integration. For more information on the NanoGrid and NanoScale product, please visit

OPTRA is a supplier of ultra precision measurement solutions using state-of-the-art electro-optical technology. We market the NanoGrid®, NanoScale®, and NanoGage® nanometer resolution grid and linear encoder products to the semiconductor, disk drive, and general research industries. OPTRA has a history of winning leading-edge technical development contracts for both commercial and government related research. OPTRA manufactures products and also licenses certain technologies that have originated from its development work.

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461 Boston Street
Topsfield, MA 01983-1290
Phone: (978) 887-6600 Fax: (978) 887-0022
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