Armstrong Optical is a specialist supplier of optical metrology instruments for both R&D and production. From Trioptics this includes interferometers for measuring shape, distance and thickness and instruments for MTF, optical centration, wedge and prism angles and most optical parameters. From Precitec we supply chromatic confocal sensors and controllers for such applications as glass/plastic thickness measurement, surface topography and distance measurement to sub-micron accuracy. They also supply chromatic vision cameras for simultaneous multi-level focusing. In addition we are partners with SIOS who manufacture precision laser interferometric measuring systems for use in nano-metrology. They also supply power/frequency stabilised HeNe lasers. Applications include measurement of length, angles and vibration with ultra-high precision.