Optical flats or test plates are polished surfaces that are used as references against the flatness of unknown surfaces for comparison. They use the property of interference to measure the flatness of a test surface.
Founded in 1989 Thorlabs designs, develops and manufactures building blocks for the photonics industry. Product lines include opto-mechanic positioning equipment, motion control stages for nano-positioning and alignment, optical components, photonics instruments, laser... (more)