Graticules, Stage Micrometers, and Calibration Standards n Optical Resolution Charts, Ronchi Rulings and Grids


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.


In addition to these products, we also supply a specialist NPL/HSE test slide for checking the resolving power of phase contrast microscopes — see Page XX ref S84 in stage micrometers.


USAF 1951 Test Chart


USAF resolution charts are recognized the world over as a universal standard for testing the vertical and horizontal resolution of imaging systems. Each element on the chart comprises three vertical bars and three horizontal bars, and the detail on these slides is as fine as 0.78microns (644 line- pairs per mm). The resolution of the imaging system is normally specified as the Group and Element of the finest bars that can be clearly defined


Cat.# 68098-01 Description USAF Test Chart Groups 0 to 7 R70


Pattern Qty. each


R71 USAF Test Chart Groups -2 to 7


USAF Test Chart. positive image. Group -2 to Group 7, element 6.


Large Positive Image ~ group -2 to 7 B270 glass, size 75mm x 75mm


Cat.# 68098-02


Description


USAF Test Chart Groups -2 to 7 R71


Pattern Qty. each


R75P High Resolution Positive Image USAF Test Chart Group 0 to Group 9, Element 3


• Sub Micron smallest feature size: bar width 0.00078mm [0.78µm]


• High Resolution Positive Image • Soda Lime Glass, 50mm x 50mm x 2mm


Cat.# 68098-03 Description USAF Test Chart,


positive image, groups 0/1 to 9/3


Fax (215) 412-8450 or 8452 • email : info@emsdiasum.com or stacie@ems-secure.com • www.emsdiasum.com Electron Microscopy Sciences In PA: (215) 412-8400 • Toll-Free (800) 523-5874 45


Pattern Qty. R75P


each


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