Gaertner Scientific Corporation is a precision optical instrument manufacturer with over a century of experience. They specialize in designing and manufacturing ellipsometers for thin film measurement, measuring microscopes for dimensional measurements, and other specialized optical instruments. The company has a rich history of developing precision scientific instruments for research, industrial, educational, and government laboratories. Gaertner Scientific is known for its high-quality ellipsometers that use non-contacting, nondestructive techniques for surface and thin film measurements. They also offer calibration standards like silicon wafers with thermally grown silicon dioxide films for ellipsometer calibration.