Filter controlling expression derivation method, light measurement system, control method for Fabry-Perot interference filter, and filter control program

A light measurement system comprising:

• a Fabry-Perot interference filter of which distance between a fixed mirror and a movable mirror is controlled by balancing an electrostatic force generated between the fixed mirror and the movable mirror and an elastic force generated in the movable mirror at a time of applying a voltage;
• and
• a control device which controls the voltage based on a relational expression between the electrostatic force and the elastic force including an elasticity index of the movable mirror described as a quadratic or higher-order polynomial with a deflection amount of the movable mirror as a variable.

A control method for a Fabry-Perot interference filter being a control method for controlling a voltage in a Fabry-Perot interference filter of which distance between a fixed mirror and a movable mirror is controlled by balancing an electrostatic force generated between the fixed mirror and the movable mirror and an elastic force generated in the movable mirror at a time of applying the voltage, the control method comprising:

• deriving a voltage corresponding to a transmission wavelength of light transmitted through the Fabry-Perot interference filter based on a relational expression between the electrostatic force and the elastic force including an elasticity index of the movable mirror described as a quadratic or higher-order polynomial with a deflection amount of the movable mirror as a variable;
• and
• setting the derived voltage as the voltage to be applied.

A non-transitory computer-readable recording medium recording a filter control program for causing a computer to execute a process of controlling a voltage in a Fabry-Perot interference filter of which distance between a fixed mirror and a movable mirror is controlled by balancing an electrostatic force generated between the fixed mirror and the movable mirror and an elastic force generated in the movable mirror at a time of applying the voltage, the filter control program causing the computer to function as:

• a voltage derivation unit which derives a voltage corresponding to a transmission wavelength of light transmitted through the Fabry-Perot interference filter based on a relational expression between the electrostatic force and the elastic force including an elasticity index of the movable mirror described as a quadratic or higher-order polynomial with a deflection amount of the movable mirror as a variable;
• and
• a voltage setting unit which sets the derived voltage as the voltage to be applied.