Graves on Infrared Deflectometry

This week we discuss infrared deflectometry and its applications towards large optics fabrication. By utilizing a long wavlength, surfaces that are not reflective in the visible are able to be tested using deflectometry. Some of the challenges that went into the IR deflectometry system, including source design, geometry considerations, and source errors are discussed. Additionally, Graves comments on his experience in being part of the team that performed metrology for the 4.2 m DKIST primary mirror. For more information on infrared deflectometry please read: http://www.loft.optics.arizona.edu/documents/journal_articles/IR_Deflectometry_SPIE_Newsroom_2015_DKim.pdf Thank you for listening to this weeks episode. If you have any questions or comments please let us know. Additionally, we are always looking for new topics to cover, so please email or comment to let us know who should be in the spotlight in the future.