Registration for IDRC 2026 is open - IDRC Registration Preliminary program is available on the Program page. The 22nd International Diffuse Reflectance Conference will be held from July 19- 23, 2026 in Knoxville, Tennessee, USA. This will be hosted by The University of Tennessee and all sessions will be conducted on the Agriculture Campus. We will be utilizing state of the art facilities of meeting rooms, lecture halls, classrooms, and spectroscopy laboratories to enhance your experience while visiting and attending this event.