Infrared temperature sensor and method of manufacturing the same

A method of manufacturing an infrared temperature sensor that detects temperature of a detection object in a non-contact manner, the method comprising:

• a step of fabricating a sensor case that is provided with a light guiding region guiding infrared rays entering from an opening part, and a light shielded region closed from surroundings and shielded from the infrared rays;
• a step of preparing a film that faces the light guiding region and the light shielded region, absorbs the infrared rays reaching through the light guiding region and converts the infrared rays into heat, and includes an infrared detection element disposed at a part corresponding to the light guiding region and a temperature compensation element disposed at a part corresponding to the light shielded region;
• a step of preparing a sensor cover that is disposed to face the sensor case through the film;
• and
• a step of assembling the sensor case and the sensor cover with the film in between, wherein
• in the step of fabricating the sensor case, a shielding part that protrudes toward an inside of a hood surrounding the light guiding region and the light shielded region while defining the opening part and the light guiding region and shields the light shielded region from the infrared rays, is formed by causing the hood to be erected from a base portion through press processing using a plate member containing a metal material, and stamping and bending of the plate member corresponding to the opening part.

An infrared temperature sensor that detects temperature of a detection object in a non-contact manner, the infrared temperature sensor comprising:

• a sensor case that includes an opening part, and is provided with a light guiding region guiding infrared rays entering from the opening part, and a light shielded region closed from surroundings and shielded from the infrared rays;
• a film that is disposed to face the light guiding region and the light shielded region and is configured to absorb the infrared rays reaching through the light guiding region and to convert the infrared rays into heat;
• a sensor cover that is disposed to face the sensor case through the film;
• an infrared detection element that is disposed at a part of the film corresponding to the light guiding region;
• and
• a temperature compensation element that is disposed at a part of the film corresponding to the light shielded region, wherein:
• the sensor case includes a base portion and a hood that surrounds the light guiding region and the light shielded region and is erected from the base portion,
• the hood includes the opening part and a shielding part that protrudes toward an inside of the hood while defining the opening part and the light guiding region and shields the light shielded region from the infrared rays, and
• a position of an end edge of the shielding part close to a surface of the film is changeable such that a protrusion direction of the shielding part toward the inside of the hood is adjustable.