Patent ID: 11892290
Assignee: NEC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  A | IPC A  G

Claim 8:
9. A non-transitory computer readable medium storing an imaging program, which if executed, causes a computer to execute operations comprising:
acquiring structural data of a measurement object in a depth direction using information about a change in an intensity ratio of interference light beams,
wherein the interference light beams are generated by interference between an object light beam and a reference light beam,
wherein the object light beam is scattered from the measurement object, after the object light beam branched from a light beam emitted from a wavelength sweeping laser light source and then passes through a transparent substrate including a structure configured to change a thickness of the transparent substrate, the structure being on a surface of the transparent substrate, and then is applied to a predetermined scanning range of the measurement object, and
wherein the reference light beam is branched from the light beam emitted from the wavelength sweeping laser light source;

acquiring a plurality of pieces of the structural data in the depth direction while moving an irradiation position of the object light beam along a direction orthogonal to the depth direction of the measurement object; and
connecting the acquired plurality of pieces of the structural data in the depth direction with a position of the structure as a reference,
wherein the transparent substrate comprises a frame disposed parallel to a direction orthogonal to the depth direction, and
wherein the structure comprises a plurality of steps formed in such a way that the thickness of the transparent substrate gradually changes toward a center of the transparent substrate.