Patent ID: 7970578

Claim:
A compensation table generation method for generating a compensation table for compensating an interference signal obtained by emitting light, splitting the emitted light into measuring light and reference light, combining reflection light from a measuring object when the measuring light is irradiated on the measuring object with the reference light, sampling interference light when the reflection light is combined with the reference light as the interference signal, the method comprising the steps of: obtaining an interference signal sampled when a reflection body is disposed in the optical axis directions of the measuring light as a reflection body interference signal; calculating, using at least one central processing unit, an evaluation output signal by resampling the obtained reflection body interference signal in a sampling space converted by Formula (1) below; and optimizing, using at least one central processing unit, a model coefficient of a compensation table set as a N-order polynomial in Formula (1) below using the calculated evaluation output signal y = ∑ i = 1 N - 1 ⁢ c i ⁢ x N + 1 - i + ( 1 - ∑ i = 1 N - 1 ⁢ c i ) ⁢ x ( 1 ) x is the reflection body interference signal sampling space y is the evaluation output signal sampling space c i is the model coefficient (i=1, 2, . . . , N−1).