Precision infrared optics manufacturer Janos Technology of Keene, N.H., announced today it has been acquired by electronic test tools and software maker Fluke Corp., a Danaher company. Specific terms of the deal, which was finalized Aug. 28, were not disclosed.The company said it will continue to operate as Janos Technology as part of Fluke's Thermal Imaging business unit, serving the defense/aerospace, infrared imaging, analytical instruments, OEM optics and assemblies markets. In 1998, conglomerate Danaher acquired Everett, Wash.-based Fluke, which develops low-voltage and temperature calibration and metrology technology for handheld products, for $625 million. For more information, visit: www.janostech.com