CaliBall II Interferometer Calibration Device with Zygo 4″ Bayonet Mount

Product Details Calibrate Transmission Spheres 1.3nm RMS Finish Includes Kinematic Mount and Certificate of Compliance The CaliBall is used to calibrate interferometer transmission spheres by using the Random Ball Test (RBT). The Random Ball Test was used with some success in the past but the materials that the balls were made from limited the measurement accuracy. The CaliBall has overcome the accuracy dilemma since it is made from silicon nitride. The 25mm balls are grade 5 (round to better than 125nm), have a surface finish of ~1.3nm rms, are opaque and 11% reflective. Virtually indestructible, Caliball is a practical solution that can be used repeatedly in a calibration environment for years without degradation. The CaliBall is supplied with a three ball kinematic mount potted in a substantial steel base that is cut away on one side so f/0.7 transmission spheres can be calibrated. The part is measured for RMS, which negates the defects or blemishes of the parts based on the average of the surface and the removal of outliers. Ball quality does not affect its ability to perform calibrations. The CaliBall with 4″ Bayonet Mount is well-suited for horizontal interferometer setups and does not require an additional x-y-z mounting configuration. Each CaliBall is shipped with a Certificate showing roundness and finish, complete instructions for use and a clean room compatible storage case. Specifications General Note: Surface Finish: 13nm RMS The part is measured for RMS, which negates the defects or blemishes of the parts based on the average of the surface and the removal of outliers. Ball quality does not affect its ability to perform calibrations. Physical & Mechanical Properties Diameter (mm): 25.40 Optical Properties Reflection (%): 11.00 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Silicone Nitride Surface Accuracy, P-V (μm): ≤0.125 Threading & Mounting Mount: Zygo 4″ Bayonet Regulatory Compliance Certificate of Conformance: View ×