OPTICAL DETECTION DEVICE AND OPERATING METHOD THEREOF

The invention discloses an optical detection device and an operation method thereof. The optical detection device comprises a light source, an optical coupling element, a reference light path modulation element and a data processing element. The light source provides incident light. The optical coupling element divides incident light into reference light and detection light, and the reference light and the detection light are respectively emitted to the reference light path modulation element and a sample to be detected. The reference light path modulation element reflects the reference light and rapidly changes the light path of the reference light. The optical coupling element interferes with the reference light reflected by the reference light path modulation element and the detection light reflected by the sample to be detected so as to generate a light interference signal. The data processing element receives the light interference signal and analyzes the light interference signal to obtain an optical de