The electronic autocollimators of the TriAngle UltraSpec Series from Trioptics GmbH are high-precision angle measurement systems that deliver high angle resolution and measuring accuracy. They are used for a wide variety of measuring, testing and adjustment processes. Applications include adjustment and verification of the straightness of linear stages, run out measurement of rotary tables, measurement of large-area surface flatness, adjustment of optical components, stability studies, and alignment of machines and equipment. Each device is calibrated with PTB angle standards and supplied with test certificates and individual calibration curves. Traceability of the measuring results to international standards of the angle measuring variable is consistently ensured.