Feature

●Conforms to 1951 US Air Force MIL-STD-150A
●Minimum Feature Size, 137 Nanometer Bar Width
●High Contrast Chrome on Quartz Glass
●Starts at Group 4, Element 1; (31 micron spacing)
●Guaranteed to Group 11, Element 6 (137 nanometer spacing)


Description

Extreme resolution target, 1951 USAF from group 4 to group 11, element 6. Mounted on a red aluminum microscope slide, durable and hard to misplace. Suitable for testing the finest, research grade, microscope objectives including oil immersed NA/1.4 objectives. 137 nm minimum spacing (Group 11, element 6). Hundreds sold to researchers around the world.