Elijah Bacchus, 36th Maintenance Squadron Precision Measurement Equipment Laboratory technician, measures the flatness of a calibrated surface using and optical flat and monochromatic light June 19, 2015, at Andersen Air Force Base, Guam. When an optical flat's surface is placed in contact with a surface to be tested, bands form when viewed with monochromatic light, which gives a visual representation of the flatness of the surface being tested. (U.S. Air Force photo by Airman 1st Class Arielle Vasquez/Released)
No camera details available.
This photograph is considered public domain and has been cleared for release.
If you would like to republish please give the photographer appropriate credit.
Further, any commercial or non-commercial use of this photograph or any other
DoD image must be made in compliance with guidance found at
which pertains to intellectual property restrictions (e.g., copyright and
trademark, including the use of official emblems, insignia, names and slogans), warnings
regarding use of images of identifiable personnel, appearance of endorsement, and related matters.