EQUIPARAMETRIC SAMPLING STRATEGY FOR EVALUATION OF HIGHER DEGREE FREE FORM SURFACE USING CONTACT MEASUREMENT

Sampling strategy of freeform surface is investigation of freeform surface using discrete sample points, sampling strategy has trade off relation between number of sample and form deviation. Many researches has been done on evaluation of free form surface using equiparameteric sampling strategy, but there is no paper which states that whether the method is convenient for higher degree free form surface evaluation or not. In this paper, the impact of equiparametric sampling strategy on degree of free form surface is analyzed. Samples are iteratively gathered from the surface of free form surface and compare for form deviation.