Patent ID: 8804125

Claim:
A detection method for an intermolecular interaction comprising: a step of shining light on a ligand; a step of measuring, by a spectrometer, light reflected by the ligand; a step of calculating, by a control device from the reflected light, a reflectance over a fixed wavelength interval to obtain a reflectance spectrum; a step of approximating, by the control device, the reflectance spectrum by a high-dimensional function; a step of selecting, by the control device, a wavelength interval having a minimum reflectance from the high-dimensional function; a step of approximating, by the control device in the wavelength interval, the high-dimensional function by a quadratic function, which is lower order than the high-dimensional function; a step of differentiating, by the control device, the quadratic function with respect to the wavelength to obtain a solution in which a value thereof becomes zero; and a step of generating, by the control device from the solution, an output signal indicating a bottom peak wavelength.