IMAGE CAPTURING APPARATUS, IMAGE CAPTURING METHOD, AND STORAGE MEDIUM

摘要

An image capturing apparatus includes a division unit which divides the beam from a light source into a reference beam and a measurement beam, a first dichroic mirror which is arranged in a measurement light path which guides the measurement beam to an object, a second dichroic mirror which is arranged in the reference light path which guides the reference beam to a reference object, and a receiving light unit which receives the interference beam of the reference beam passing through the second dichroic mirror and the measurement beam passing through the first dichroic mirror. [Reference numerals] (AA) Start; (BB) Procedure for obtaining the phase characteristic of an OCT device(calibration); (CC) Procedure for obtaining a tomographic image; (DD) End; (S401) Obtain a spectrum; (S402) Obtain a transformation interference signal in which a wavelength is transformed into a frequency; (S403) Fourier transform; (S404) High-pass filter process; (S405) Inverse fourier transform; (S406) Measure the phase of the interference signal; (S407) Unwrapping the phase ψ(k); (S408) Output an absolute value; (S409) Detect the signal frequency of the interference signal; (S410) Output a phase component from the detected frequency y(k); (S411) Calculate a phase function : Φ(k) = ψ(k) - y(k); (S420) Transform the interference signal and the phase function into a complex type and multiply both(separate the information in which the phase characteristic is included); (S421) Convert the complex display to a mistake display; (S422) Obtain the tomographic image