抄録
Grinding mark such as spiral or concentric circle pattern is usually generated on ground axi-symmetric aspherical surfaces. The grinding mark on most machined-parts usually does not incur any serious problem. However, grinding marks generated on optical parts such as lenses cause image distortion. As the image quality of optical instruments becomes more rigorous, the effect of the grinding marks becomes conspicuous. In this research, the relationship between grinding conditions and grinding marks is investigated theoretically. The result of theoretical analysis shows that the slight vibration of wheel spindle causes the grinding marks. The result of theoretical analysis also shows that a spiral circle pattern grinding marks are generated under a constant spindle speeds. On the other hand, a concentric circle pattern grinding marks are generated under fluctuating grinding spindle speed. In addition, grinding marks of higher order are analyzed. The order of the most conspicuous grinding marks depends on grinding conditions, such as spindle speeds and wheel feed rate.
