Patent ID: 11966172
Assignee: FUJIFILM BUSINESS INNOVATION CORP.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A charging member comprising:
an electrically conductive base;
an elastic layer disposed on the electrically conductive base; and
a surface layer disposed on the elastic layer,
wherein a PFVTF value of a surface of the surface layer is 1.5 or less, the PFVTF value being obtained by Fourier transforming a roughness curve of the surface of the surface layer that is measured in a circumferential direction to thereby obtain amplitude intensities at different periods, multiplying the amplitude intensities at different periods by VTF coefficients at respective periods that are obtained from a visual characteristic VTFL* (f=period) for lightness L* represented by Formula (V) below to thereby obtain corrected amplitude intensities at different periods, and integrating the corrected amplitude intensities in a period range of from 100 μm to 1000 μm inclusive:

VTFL*(f)=5.05×(e(−0.843×1×f)−e(−1.454×1×f)).  Formula (V):