INTERFERENCE MEASURING DEVICE AND INTERFERENCE MEASURING METHOD

摘要

Disclosed is interference measuring device for acquiring an interference image used for acquiring three-dimensional information relating to a subject with dynamic variation. A digital holography device (60) of the invention is provided with a laser light source (1), a beam splitter (6) for splitting a laser beam into a reference light beam and an object light beam, and an image capturing element (2). The image capturing element (2) captures an image of the interference pattern formed by the reference light beam and the object light beam arriving via the subject (20). The digital holography device (60) is further provided with a polarized light splitting element (11) for splitting the object light beam into two kinds of object light beam having different directions of polarization and causing an angle difference between the directions of propagation thereof and a polarizer array device (30) in which first polarizer regions and second polarizer regions are arranged and which transmits the reference light beam and the object light beam arriving via the subject (20). Since the first and second polarizer regions of the polarizer array device (30) transmits the polarized components having different directions, capturing an image only once can form a plurality of interference patterns required for phase connection.