Optical module, electronic device, and driving method

An optical module comprising:

• a first reflective film that transmits a first portion of incident light and reflects a second portion of the incident light;
• a second reflective film, disposed so as to face the first reflective film, that reflects a third portion of the incident light and transmits a fourth portion of the incident light;
• and
• a gap controller that changes a size of a gap between the first reflective film and the second reflective film,
• wherein the gap controller controls the size of the gap in correspondence with a wavelength to be measured based on an order of a transmission spectrum which is set with respect to each of two or more wavelength region groups constituting a wavelength region to be measured,
• wherein a measurement wavelength region includes a first wavelength region and a second wavelength region having a longer wavelength than that of the first wavelength region,
• the wavelength to be measured includes a lower-order peak wavelength and a higher-order peak wavelength, and the wavelength to be measured is transmitted using the higher-order peak wavelength to thereby enable the gap between the reflective films to be increased in comparison to where the wavelength to be measured is transmitted using the lower-order peak wavelength,
• wherein m and n are different natural numbers, and m=n+1,
• wherein light of the wavelength to be measured in the first wavelength region is transmitted using an m-th peak wavelength as the higher-order peak wavelength, and light of a wavelength to be measured in the second wavelength region is transmitted using an n-th peak wavelength as the lower-order peak wavelength,
• wherein the gap controller controls the size of the gap using an m-th peak wavelength for light of the first wavelength region, and controls the size of the gap using an n-th peak wavelength for light of the second wavelength region, and
• wherein the gap for extracting light having a shortest wavelength in the second wavelength region is larger than the gap for extracting light having a longest wavelength in the first wavelength region.