The International Diffuse Reflectance Conference is convened every two years. The late Dr. Gerald S. Birth was the founder of the IDRC (The Chambersburg Conference), now sponsored by the CNIRS. The Chambersburg Conference follows the Gordon Conference format: the attendees attend plenary morning and evening sessions, with afternoons free for elective activities. This allows a unique opportunity for informal interaction with highly accomplished professionals in the field. Since 1982, this conference has offered the opportunity to forge lifelong professional relationships and friendships.