Abstract: The present disclosure relates to an in-plane two-dimensional translational optical actuator. The in-plane two-dimensional translational optical actuator includes a fixed plate, a translational plate, i elastic assemblies located between the fixed plate and the translational plate and with two ends connected to the fixed plate and the translational plate respectively, and j electromagnetic drive assemblies fixed between the fixed plate and the translational plate. Each elastic assembly is composed of elastic elements of the same or different quantities, and at least one elastic assembly in the i elastic assemblies has two or more elastic elements. The j electromagnetic drive assemblies are disposed in a plane in two different directions, and used to drive the translational plate to move relative to the fixed plate within a plane where the translational plate is located in two different directions, so as to achieve two-dimensional translation of the translational plate.

Abstract: A galvanometer positioning tool and a laser printer. The galvanometer positioning tool includes: a base provided with a bearing surface and provided with a first concave spherical surface; a bracket placed on the bearing surface, a positioning assembly being provided on a side surface of the bracket facing the bearing surface, a galvanometer being mounted on the bracket; and a reflection center of the galvanometer located on the spherical center of the sphere where the first concave spherical surface is located. The rotation assembly includes a first rotation rod fixedly connected to the second rotation rod and rotatably connected to the base. The second rotation rod is slidably connected to the bracket, and when the first rotation rod rotates relative to the base, the first rotation rod is capable of driving the bracket to rotate with the y-axis of the galvanometer as a rotation axis.

Abstract: A galvanometer positioning tool and a laser printer. The galvanometer positioning tool includes: a base provided with a bearing surface and provided with a first concave spherical surface; a bracket placed on the bearing surface, a positioning assembly being provided on a side surface of the bracket facing the bearing surface, a galvanometer being mounted on the bracket; and a reflection center of the galvanometer located on the spherical center of the sphere where the first concave spherical surface is located. The rotation assembly includes a first rotation rod fixedly connected to the second rotation rod and rotatably connected to the base. The second rotation rod is slidably connected to the bracket, and when the first rotation rod rotates relative to the base, the first rotation rod is capable of driving the bracket to rotate with the y-axis of the galvanometer as a rotation axis.

Abstract: A method and circuit for obtaining a capacitive feedback signal of a capacitive feedback micro torsion mirror are provided to solve the problem of poor stability of the capacitive feedback signals of the micro torsion mirror. First, a pulse signal is used as a driving signal to drive the capacitive feedback micro torsion mirror to vibrate; it is ensured that the micro torsion mirror may twist freely for at least 0.5 cycles during an interval of two adjacent sets of driving pulses; secondly, the capacitive feedback signal of the capacitive feedback micro torsion mirror is extracted, and converted into a voltage signal; then, the voltage signal is amplified; and finally extracted during the interval of the two adjacent sets of driving pulses, and taken as a real capacitive feedback signal. A carrier generation circuit and a detection circuit are omitted, and the influence of the carrier generation circuit and the detection circuit on a capacitive feedback signal is eliminated.

Abstract: A method and circuit for obtaining a capacitive feedback signal of a capacitive feedback micro torsion mirror are provided to solve the problem of poor stability of the capacitive feedback signals of the micro torsion mirror. First, a pulse signal is used as a driving signal to drive the capacitive feedback micro torsion mirror to vibrate; it is ensured that the micro torsion mirror may twist freely for at least 0.5 cycles during an interval of two adjacent sets of driving pulses; secondly, the capacitive feedback signal of the capacitive feedback micro torsion mirror is extracted, and converted into a voltage signal; then, the voltage signal is amplified; and finally extracted during the interval of the two adjacent sets of driving pulses, and taken as a real capacitive feedback signal. A carrier generation circuit and a detection circuit are omitted, and the influence of the carrier generation circuit and the detection circuit on a capacitive feedback signal is eliminated.