US 12,276,604 B2
Infrared spectrometer
Tomohiro Katsumata, Tokyo (JP); and Hiroshi Sugiyama, Tokyo (JP)
Assigned to JASCO CORPORATION, Tokyo (JP)
Filed by JASCO CORPORATION, Tokyo (JP)
Filed on Feb. 21, 2023, as Appl. No. 18/112,150.
Claims priority of application No. 2022-025629 (JP), filed on Feb. 22, 2022.
Prior Publication US 2023/0266240 A1, Aug. 24, 2023
Int. Cl. G01N 21/3554 (2014.01); B01D 53/26 (2006.01); G01N 21/35 (2014.01)
CPC G01N 21/3554 (2013.01) [B01D 53/261 (2013.01); B01D 2257/80 (2013.01); G01N 2021/3595 (2013.01)] 4 Claims
OG exemplary drawing
 
1. An infrared spectrometer comprising
an openable sealed housing that houses optical components;
an infrared light source that irradiates an infrared light into the sealed housing;
a dehumidifier that dehumidifies an inside of the sealed housing;
a thermo-hygro sensor that detects a humidity inside the sealed housing; and
a controller that controls power supply to the infrared light source,
takes out the infrared light as a measurement light via the optical components inside the sealed housing, irradiates the measurement light to a sample disposed outside the sealed housing, and acquires a spectrum based on a detected value of a light from the sample,
wherein the controller:
starts the infrared light source while limiting power supply to the infrared light source;
determines presence/absence of a risk of condensation inside the sealed housing based on a detected value of humidity detected while power is supplied to the infrared light source; and,
when the risk of condensation is determined to be present, balances a rate of increase of the detected value of humidity detected while power is supplied to the infrared light source and a rate of decrease of humidity dehumidified by the dehumidifier, and at the same time, gradually increases power supply to the infrared light source.