Infrared temperature sensor and fixing device using the same

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

• a sensor case made of metal, the sensor case including a light guiding region that guides infrared rays entering from an entrance window, a light shielding region that is adjacent to the light guiding region via a partition wall, an airspace corresponding to the light guiding region and the light shielding region, and where a shielding wall that blocks entrance of the infrared rays is formed on an entrance side of the infrared rays;
• a film that is arranged opposing the light guiding region and the light shielding region, and that absorbs the infrared rays reaching the film through the light guiding region, and converts the infrared rays to heat;
• a sensor cover that is made of metal and arranged opposing the sensor case via the film;
• an infrared detection element that is arranged at a position on the film corresponding to the light guiding region;
• and
• a temperature compensation element that is arranged at a position on the film corresponding to the light shielding region,
• wherein the light guiding region and the light shielding region have substantially symmetrical forms with respect to the partition wall,
• wherein the light guiding region, the light shielding region and the partition wall are formed by fitting an infrared absorption molded body to the airspace, and
• wherein the film is held between the sensor case and the sensor cover.