Optical resonance scanner

摘要

An optical resonance scanner has a spring-elastic bending element (10) excitable to effect rotational oscillations about a longitudinal axis (A-A) using a stationary magnet (9) and a stationary drive coil (5) that is wound around a pole shoe (20). The pole shoe (20) is magnetically coupled to the magnet (9) and has two mutually opposite free ends (21, 22) between which the bending element (10) is arranged symmetrically so that a magnetic flux can be transferred substantially perpendicularly to the longitudinal axis (A-A). In superimposition of the magnet- and coil-induced magnetic fluxes the magnet (9) and a first half (23) of the pole shoe (20) form a first magnetic circuit (30), and the magnet (9) and a second half (24) of the pole shoe (20) form a second magnetic circuit (31), which run in opposite senses with respect to one another in a plane perpendicularly to the longitudinal axis (A-A) through a magnetizable section (6) of the bending element (10).

主权项

1. An optical resonance scanner, comprising:
a resilient bending element (10) excitable to rotationally vibrate about a longitudinal axis (A-A), by at least one stationary magnet (9) and at least one stationary drive coil (5), wherein the drive coil (5) is wound around a pole shoe (20) which is magnetically coupled to the magnet (9) and has two opposing free ends (21, 22) between which the bending element (10) is arranged symmetrically so that, between the bending element (10) and the free ends (21, 22) of the pole shoe (20), a magnetic flux is transmittable between the bending element (10) and the free ends (21, 22) of the pole shoe (20) in a manner substantially perpendicularly to the longitudinal axis (A-A), wherein the magnet (9) is arranged symmetrically relative to the free ends (21, 22) of the pole shoe (20) so that the magnetic flux generated by the magnet (9) couples to the bending element (10) substantially perpendicularly to the longitudinal axis (A-A), and a first magnetic circuit (30) is formed by the magnet (9) and a first half (23) of the pole shoe (20), and a second magnetic circuit (31) is formed by the magnet (9) and a second half (24) of the pole shoe (20), both by way of the superposition of the magnet-induced and coil-induced magnetic fluxes, said magnetic circuits extending counter to one another through a magnetizable portion (60) of the bending element (10) in a plane perpendicular to the longitudinal axis (A-A); and a short circuit winding (8.1) surrounds the magnet (9).