NIM has established working primary standard for ophthalmometers and realized the calibration and...

Start Date

End Date

2013

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Development of Axial Standard for Ophthalmometers

 

 

NIM has established working primary standard for ophthalmometers and realized the calibration and traceability for quantity values of curvature and corneal refractive power. With the development of optical processing and testing technology, toric surface design, processing and testing become possible. The main task of the project is to develop axial standard of ophthalmometer which is planned to use toric surface. The difficulties lie in the manufacture and precision measurement of toric surface, and also the axial positioning method. With the axial standard developed, the axial calibration of ophthalmometers can be achieved. Moreover, the present working primary standard for ophthalmometers can be perfected and capability is expanded. The funding is 200,000 Yuan and expected to be completed by the end of 2013.

 

measurement result for toric surface of axial standard of ophthalmometer