Roundness Calibration System for 2D Patterns is used for zero-height graphic roundness calibratio...

Start Date

January, 2010

End Date

December, 2011

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Roundness Calibration System for 2D Patterns

 

Roundness Calibration System for 2D Patterns is used for zero-height graphic roundness calibration with imaging probes. A roundness calibration system for 2D patterns is built with an optical sensor. Its sampling and evaluation method remain the same with the traditional roundness instruments in order to be compatible to equipment for sphere roundness determination.

CMC: U = 0.15μm, k=2.

 

2D round standard is an indispensable part used for imaging error evaluation of imaging/photographic equipment. Roundness is one key parameter of the 2D round standard.

 

Traditional roundness measurement method is contact method using roundness measuring equipment with touch probes. These instruments need to directly contact to surface of the objects through the touch probes, so the objects should be 3 dimensional.

 

The project developed a new optical probe based on linear sensor, combined with optical probe with traditional roundness instrument and built a new optical roundness calibration system. The system calibrates roundness of 2D pattern in a same way to sphere roundness measurement.

 

The system has an uncertainty of U=0.15μm (k=2) which reaches an international advanced level.