Patent ID: 11906811
Assignee: DATALOGIC IP TECH, S.R.L.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 18:
19. A method for focusing a light beam, comprising:
moving an optical assembly comprising at least one focusing lens and/or mirror with respect to a support structure along a moving direction substantially parallel to an optical axis of the optical assembly, a movement being obtained due to a magnetic interaction between at least one permanent magnet integrally associated with one of the optical assembly and the support structure and an electric current that flows within at least one first electrical winding integrally associated with the other of the optical assembly and the support structure;
detecting a position of said optical assembly with respect to said support structure by at least one position sensor;
short-circuiting at least one second electrical winding integrally associated to the other of the optical assembly and the support structure in response to the position of the optical assembly, as detected by said at least one position sensor, reaching a defined position that is close to a desired focusing position so as to generate, due to an electromagnetic induction generated by a relative motion between said at least one permanent magnet and said at least one second electrical winding, a braking force that opposes the movement of the optical assembly along said moving direction so at to stop the optical assembly at said desired focusing position.