Loading patent…
AssigneeHoriba, Ltd.
InventorsTakuya Ido, Tetsuya Mori
Estimating the term…
A gas measurement apparatus measures a target gas. The gas measurement apparatus includes a light source, a first light receiving apparatus, a first phase-sensitive detection apparatus, an R calculation unit, and a setting unit. The light source oscillates a laser light that has a central wavelength determined by a main current and is modulated according to a modulation current, with the central wavelength being varied. The first light receiving apparatus outputs a detection signal according to an intensity of the laser light transmitted through a standard sample. The first phase-sensitive detection apparatus obtains a second harmonic component oscillated at a harmonic frequency ω2 twice as large as a modulation frequency ω1. The R calculation unit calculates a peak-bottom ratio R. The setting unit sets a width of wavelength modulation of the laser light so that the peak-bottom ratio R satisfies a predetermined condition.
A gas measurement apparatus for measuring a target gas, comprising:
A method of setting a width of wavelength modulation of a gas measurement apparatus comprising a light source configured to oscillate a laser light that has a central wavelength determined by a main current and is modulated according to a modulation current and a detection unit configured to output a signal according to an intensity of the laser light transmitted through a target gas, comprising:
A non-transitory storage medium storing a program that causes a computer to perform a method of setting a width of wavelength modulation used by a gas measurement apparatus comprising a light source configured to oscillate a laser light that has a central wavelength determined by a main current and is modulated according to a modulation current while varying the central wavelength, a detection unit configured to output a detection signal according to an intensity of the laser light transmitted through a standard sample, and an obtaining unit configured to obtain a specific frequency component of the detection signal that is oscillated at a frequency that is a positive integral multiple of a oscillation frequency of the modulation current, comprising:
Dependencies are inferred from the claim text.