The FWTCM-IV transmission eccentricity meter uses a cross-shaped splitting plate through an optical system to image the lens under test, rotates the lens under test, and checks the degree of deviation of the cross image to check the center deviation.

Rotate around the outer circle of the lens; if the lens's optical axis is completely concentric relative to the outer circle, the monitor's cross image (cross bright spot) will not rotate. If the lens's optical axis is eccentric relative to the outer circle of the lens, the monitor's cross-shaped image (cross-shaped bright spot) will rotate, and its trajectory is the movement of the lens's focal point around the outer circle of the lens as magnified by the optical system. The lens-type eccentricity meter checks the overall eccentricity of the lens being measured, ignoring the influence of each R face.

Scope of application

Single-lens eccentricity detection

Online eccentricity detection for laminated lens production

Eccentric detection of bonded lens groups

Lens group comprehensive eccentricity detection