Apparatus and method for estimating biological substance, apparatus for acquiring unit spectrum, and wearable device

A method of estimating a biological substance, the method comprising:

• emitting a light to a skin of a user;
• detecting the light returned from the skin;
• measuring a skin spectrum of the user from the detected light;
• and
• estimating a biological substance in the user based on the measured skin spectrum and a unit spectrum acquired using a biological tissue simulation solution.

An apparatus for acquire a unit spectrum, the apparatus comprising:

• a receptor configured to receive a biological tissue simulation solution;
• a reflector configured to reflect a light incident onto the receptor;
• a spectrometer configured to emit the light into the receptor, detect light the reflected by the reflector, and measure a spectrum from the detected light;
• and
• a processor configured to acquire a unit spectrum for a biological substance based on the spectrum measured by the spectrometer.

A method for acquiring a unit spectrum, the method comprising:

• emitting a first light to a storage when the storage contains a first serum solution without a bio substance;
• detecting the first light passing through the first serum solution and reflecting from a reflective material;
• emitting a second light to the storage when the storage contains a second serum solution comprising the bio substance;
• detecting the second light passing through the serum solution and reflecting from the reflective material;
• and
• obtaining a unit spectrum based on the detected first light and the detected second light.