Teledyne FLIR LLC, formerly FLIR Systems Inc, (an acronym for "forward-looking infrared"), a subsidiary of Teledyne Technologies since January 2021, specializes in the design and production of thermal imaging cameras and sensors. Its main customers are governments and in 2020, approximately 31% of its revenues were from the federal government of the United States and its agencies.

The company was founded as FLIR Systems in 1978 to pioneer the development of high-performance, low-cost infrared (thermal) imaging systems for airborne uses.

Originally based in Tigard, Oregon, the company relocated to Portland, Oregon, in the mid-1990s.

In 1990, the company acquired the industrial infrared imaging group of Hughes Aircraft Company.

In June 1993, the company became a public company via an initial public offering, raising $12 million.

In January 1998, the company acquired Agema Infrared System of Sweden for approximately $80 million.

In January 1999, J. Kenneth Stringer III was named President and CEO of the company.

In April 1999, the company acquired Inframetrics.