| 摘要 |
PROBLEM TO BE SOLVED: To provide an infrared sensor with small measurement error.SOLUTION: An infrared sensor 10 includes: an infrared detector 11; a package 20 which stores the infrared detector 11 and has a cylinder part 22A protruding outward being formed with a window part 22B at the front end thereof; and an infrared ray lens 31 attached to the package 20 therein so as to seal the base part of the cylinder part 22A to focus the infrared ray onto the infrared detector 11. The cylinder part 22A shields infrared ray out of the field to reduce measurement error. |
