Abstract: An optical measurement device includes: a light source generating an optical frequency comb; a first optical path guiding an optical pulse train having a pulse interval based on the repetition frequency of the optical frequency comb and an inter-pulse phase difference based on a carrier envelope offset frequency and a repetition frequency to a measurement target; a second optical path guiding measurement result light acquired from the measurement target; a third optical path guiding delay light acquired by delaying the optical pulse train; an interference unit causing the measurement result light guided by the second optical path and the delay light guided by the third optical path to interfere with each other; and a control unit performing variable control of at least one of the carrier envelope offset frequency and the repetition frequency of the light source on the basis of the state of light.

Abstract: A wavefront control device includes: an optical frequency comb generating part configured to emit an optical frequency comb including a plurality of light pulses arranged in numerical order on a time axis; and a wavefront synthesizing part configured to distribute the plurality of light pulses of the optical frequency comb incident from the optical frequency comb generating part to different positions according to phases relative to the first light pulse on a surface crossing a traveling direction of the optical frequency comb and to generate a synthetic wavefront of the light pulses emitted from the different positions. The optical frequency comb generating part includes a phase controlling part configured to control a repetition frequency and an offset frequency of the optical frequency comb.

Abstract: A shape measurement method of the present invention includes: a step of irradiating a measurement object with an optical pulse train in which a plurality of optical pulses that have predetermined frequency distributions on a time axis are disposed chronologically in numerical order; and a step of measuring an optical shape of the measurement object in accordance with a correspondent relation between numbers of the optical pulses of a plurality of detection target optical pulse trains after the emitted optical pulse train acts on the measurement object and a correspondent relation between the frequency distributions in the optical pulses.

Abstract: A shape measurement method of the present invention includes: a step of irradiating a measurement object with an optical pulse train in which a plurality of optical pulses that have predetermined frequency distributions on a time axis are disposed chronologically in numerical order; and a step of measuring an optical shape of the measurement object in accordance with a correspondent relation between numbers of the optical pulses of a plurality of detection target optical pulse trains after the emitted optical pulse train acts on the measurement object and a correspondent relation between the frequency distributions in the optical pulses.

Abstract: An object is positioned in space by using a beam splitter to split a low-coherence laser light beam into a probe beam and a reference beam. The probe beam is projected at the target object, while the reference beam is reflected by a pair of mirrors synchronized along light paths and scanned at different amplitudes, to form two beams of equal intensity, and light reflected by the object and the interference fringes are detected together to obtain fringe signals with sharpened profile lines.