ZHOU Xu-sheng, LI Sheng-yi, DAI Yi-fan, et al. Correcting errors in definite area: a new method for controlling mid-spatial-frequency errors in optical surface[J]. Optics and precision engineering, 2007, 15(11): 1668-1673.
ZHOU Xu-sheng, LI Sheng-yi, DAI Yi-fan, et al. Correcting errors in definite area: a new method for controlling mid-spatial-frequency errors in optical surface[J]. Optics and precision engineering, 2007, 15(11): 1668-1673.DOI:
A new method for controlling the mid-spatial-frequency errors located in definite area in a large optical surface
correcting errors in definite area
was brought forward. The basic idea and workflow were presented. Then
the processing parameters were optimized based on the maximum entropy principle.The optimized rotate speed ratio is -1 or 0
and the eccentricity ratio approaches 0 but not 0. Finally
a comparative experiment was done on a Φ100 mm K9 glass flat mirror. The experimental results indicate that the PSD value of 0.28 mm
-1
frequency errors decreases from 14.76 nm
2
·mm to 3.70 nm
2
·mm within 1.5 min. The mid-spatial-frequency errors in optical surfaces can be controlled effectively by means of correcting errors in definite area. Compared with other methods
the correcting errors method in definite area has the advantages of determinacy and high-efficiency in optical machining.