Six-directional pseudorandom consecutive unicursal polishing path for suppressing mid-spatial frequency error and...

Area of Science:

• Manufacturing Engineering
• Optical Engineering
• Surface Metrology

Background:

• Surface quality and mid-spatial frequency (MSF) error are critical in precision manufacturing.
• Traditional polishing paths often struggle to suppress MSF errors effectively.

Purpose of the Study:

• To propose a novel six-directional pseudorandom consecutive unicursal polishing path.
• To demonstrate the path's effectiveness in suppressing MSF errors and improving surface uniformity.

Main Methods:

• Development of a six-directional pseudorandom consecutive unicursal polishing path generation method.
• Conducting contrast experiments comparing the proposed path with traditional methods.
• Analysis of measurement data using empirical mode decomposition (EMD) and fast Fourier transform (FFT).

Main Results:

• The proposed path significantly reduces the fluctuation amplitude and area of MSF errors.
• Experimental results confirm the path's high randomness and ability to suppress MSF errors.
• Multi-valued wavelengths of spectral crests were observed, indicating improved error suppression.

Conclusions:

• The novel six-directional pseudorandom path is superior to traditional paths for MSF error suppression.
• This path enables consecutive uniform coverage and enhanced surface quality.
• The method provides a viable solution for achieving high-precision surfaces in optical and precision manufacturing.