An optical fiber fringe projector for micro-component

An optical fringe projector technique for microcomponent is developed and a nalyzed. Using arrangement of two-fiber based on Young's fringe interferome ter, the sinusoidal fringe pattern has been obtained. Due to separation of two fibers located in front of two neighboring faces of a beamsplitter, the fringe pattern with different pitches in the superimposed area of two lase r beams from two fibers can be readily provided by adjusting the location o f one of two fibers. The compact set-up by incorporating with two beamsplit ters and a long distance microscope enables the fine pitch of interference fringe pattern projected onto the surface of micro-component. The experimen tal results show good visibility of fringe pattern with fringe pitch to 10 mu m and the designed interferometer can be used as a fringe projector for micro-component measurement.