ABTech Designs Optical Metrology Station with 5 Axes of Motion
OptiPro Systems, a well-respected optical machine manufacturer, came to ABTech with a concept and left with a complete motion system.
They first approached ABTech to supply just air bearing stages for their prototype metrology station. Using their concept as the framework, we applied our expertise in multi-axis motion and our understanding of geometric measurement principles to propose the design, manufacture and certification of a complete motion platform. The company was delighted with the result.
Six ultra-precision designed prototype metrology station. Each axes has a direct drive motor and high-resolution encoder to help achieve rotary error motion of ±1 arc second over a 360° move, and linear accuracy of ±1 micron over 8 inches of travel in the X, Y and Z directions.
The 10 inch (250mm) rotary air bearing table with dual read heads is mounted on stacked X-Y linear air bearing stages. The vertical Z-axis linear air bearing with ceramic rail supports a face-mounted 4 inch (100mm) rotary air bearing and is counterbalanced over an air bearing roller sleeve. The bi-level precision granite base is suspended on air bags on a vibration isolation stand to reduce outside interference.
- Compact and uncluttered design with 5-axis motion
- Granite, ceramic and steel materials and Invar linear scales for thermal stability
- X-Y linear stages with vertical stiffness greater than 1 million pounds/inch
- Rotary error motion: ±1 arc second total over 360° move
- Accuracy: ±1 micron (±40 micro-inches) over 8 inch (200mm) linear travel in X, Y and Z directions
- Renishaw encoders and dual Signum 5 nm resolution read heads to eliminate odd error harmonics
“OptiPro interviewed three potential candidate companies for our 5-axis UltraSurf non-contact metrology system. Although ABTech was the smallest of the three, we felt that their experience, engineering team and product knowledge was at the top of the list. Just as important to us was having a partner willing to work with us from our beginning concepts and design to the final product. By combining our ideas with their existing high precision air bearing slides and rotary axes, we worked together to develop what we believe is the best possible solution for non-contact measurement of optical components in the world today. Communication is key and they understand it. Great people to work with!” – Mike Bechtold, President, OptiPro Systems