The optical resolution charts are used to test characteristics such as resolution, contrast, distortion and modulation transfer function (MTF) of lenses, cameras and optical systems. Ronchi rulings and grids are used to create interference patterns, to measure distortion and for MTF measurements.
EMS offers a range of charts on glass and in metal foil. Customers often require special charts for specific applications and these can be made to your exact requirements.
USAF Test Chart Group 0 to Group 9, Element 3
High Resolution Positive Image
Soda Lime Glass 50mm x 50mm x 2mm
Sub Micron smallest feature size: bar width 0.00078mm [0.78µm]
Sub Micron smallest feature size - bar width 0.00078mm [0.78 um].