The GPI LC™ is the foundation of the GPI family. It allows you to perform visual fringe analysis of flat or spherical surfaces, and transmitted wavefront measurement of optical components and assemblies. Images are displayed on a high-quality 9" monochrome video monitor.

The video monitor also displays ZYGO's QFAS (Quick Fringe Acquisition System) two-spot alignment. Fast and reliable electronic switching (using a hand-held remote) alternates between the "align" and "view" images on the video monitor, making fringe display a snap. Its fixed-focus optical system ensures that parts are always in focus when placed in the measurement region.

The GPI LC requires operator fringe pattern interpretation.