Characterizing Lasers for IPSII Interferometry

Our research group is developing a new type of lensless imaging known as Interference Pattern Structured Illumination Imaging (IPSII). IPSII uses interfering laser beams to project different patterns onto an object. IPSII requires lasers with excellent coherence to produce high visibility fringes. We are using a modified Michelson interferometer setup to test the fringe visibility produced by various lasers. We use an arduino and a photodiode to automate data collection from the fringes which we can use to compare and contrast different lasers. We can then use the data from the arduino to test whether or not a variety of lasers will be suitable for IPSII.