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光栅发讯器莫尔条纹光强分布及位移—光强关系,在很大程度上决定了光电转换器件输出信号的幅度,波形及信号调制度等重要性质。本文推导了莫尔条纹光强分布及位移—光强关系的普遍表达式,并分别对光闸式,游标式及横向莫尔条纹进行了讨论。从光强表达式引出的莫尔条纹几何参数与文献(1)完全一致,从而把莫尔光强分布与几何计算统一起来。本文只讨论振幅光栅,光栅具有较长的空间周期与不变的空间频率,由平行的均匀的非相干光垂直入射,光栅组间无间隙或具有小间隙,光电器件直接接收从光栏出射的莫尔光强。
The relationship between the intensity distribution of the moire fringes and the displacement-light intensity of the grating transmitters largely determines the important properties such as the amplitude, waveform and signal modulation of the output signal of the photoelectric conversion device. This paper deduces the general expression of light intensity distribution and displacement-light intensity relationship of moire fringes, and discusses the shutter, the vernier and the transverse moire fringes respectively. The geometrical parameters of Moiré fringes derived from the expression of light intensity are exactly the same as those in literature (1), which unifies the Moiré distribution and geometric calculation. In this paper, only the amplitude grating is discussed. The grating has a long period of space and a constant spatial frequency. The grating is perpendicularly incident by parallel uniform incoherent light. The grating groups have no gap or small gap. The photoelectric device directly receives the light emitted from the light bar Moore light.