Patent ID: 11948845
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 3:
4. The device for testing flatness according to claim 3, wherein the driving mechanism comprises a first linear driving mechanism, a second linear driving mechanism, and a third linear driving mechanism, wherein the first linear driving mechanism extends in a first direction, the second linear driving mechanism extends in a second direction, the third linear driving mechanism extends in a third direction, the first direction intersects the second direction, and the third direction is perpendicular to the first direction and the second direction;
the first linear driving mechanism is disposed on the second linear driving mechanism, and the second linear driving mechanism is used to drive the first linear driving mechanism to move along the second linear driving mechanism;
the third linear driving mechanism is disposed on the first linear driving mechanism, and the first linear driving mechanism is used to drive the third linear driving mechanism to move along the first linear driving mechanism;
the ranging sensor is disposed on the third linear driving mechanism, and the third linear driving mechanism is used to drive the ranging sensor to move along the third linear driving mechanism.