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

Claim 8:
9. The charging member according to claim 1, wherein a PFVTF value of a surface of the elastic layer is 1.5 or less, the PFVTF value being obtained by Fourier transforming a roughness curve of the surface of the elastic layer that is measured in the circumferential direction to thereby obtain amplitude intensities at different periods, multiplying the amplitude intensities at different periods by the VTF coefficients at respective periods that are obtained from the 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):