The invention relates to a long-range optical device, in particular telescopic sight, comprising a reticle, the position of which can be adjusted, and comprising an associated mechanism for adjusting the reticle, comprising a first magnetic element in the form of a ring magnet, a second magnetic element in the form of a bar magnet, motion-coupled to the reticle and movably mounted relative to the first magnetic element, wherein a variable magnetic characteristic value is formed as a function of the relative position between the first and the second magnetic element, a detection unit, which is configured to detect a change in the magnetic characteristic value formed in the first or second magnetic element, a determination unit to determine reticle position information describing the position of the reticle based on a magnetic characteristic value of the first and/or second magnetic element.

A magnetic field sensor for sensing an absolute position of a target includes a first magnetic field sensing element disposed proximate to a first portion of the target having a first cross-sectional shape configured to generate a first periodic magnetic field signal in response to movement of the first target portion and a second magnetic field sensing element disposed proximate to a second portion of the target having a second cross-sectional shape configured to generate a second periodic magnetic field signal in response to movement of the second target portion, wherein the first periodic magnetic field signal and the second periodic magnetic field signal have a substantially constant phase separation. An output format module responsive to the first periodic magnetic field signal and the second periodic magnetic field signal is configured to generate an output signal of the magnetic field sensor.

A magnetic measuring apparatus includes at least one magnetic sensor, a coil, a driving circuit configured to supply a current to the coil, a conductor electrically connecting the coil and the driving circuit, and a computing device which estimates relative positions of the magnetic sensor and the coil based on a magnetic field generated by the current supplied to the coil and detected by the magnetic sensor. The magnetic sensor has a magnetic detection sensitivity in a particular direction, and the particular direction of the magnetic sensor and a current vector of the current flowing through the conductor are parallel.

An integrated circuit package and method of fabrication are described. The integrated circuit package includes a lead frame having a first surface and a second opposing surface and a semiconductor die having a first, active surface in which circuitry is disposed and a second opposing surface attached to the first surface of the lead frame. A magnet attached to the second surface of the lead frame has a non-contiguous central region and at least one channel extending laterally from the central region. An overmold material forms an enclosure surrounding the magnet, semiconductor die, and a portion of the lead frame.

A detecting unit generates detection signals corresponding to a plurality of ranges aligned in one direction along a moving direction of a detection body, based on a change in the magnetic field constantly received by a detecting element from the detection body. A signal processing unit acquires a detection signal from the detecting unit, compares the detection signal with a threshold value, and identifies a position of the detection body as a position of any one of a plurality of ranges based on a combination of a magnitude relationship between the detection signal and the threshold value. A detection body has a plurality of region portions corresponding to a plurality of ranges. The plurality of region portions are configured to be connected stepwise in the moving direction of the detection body within a plane of a detection surface facing the detecting unit of the detection body.

A magnetic substance detection sensor includes a first support substrate, a magnet disposed on the upper main surface of the first support substrate so that a magnetization direction becomes parallel to the upper main surface of the first support substrate, a semiconductor chip disposed on the upper main surface of the first support substrate and having a magnetic field detection element configured to detect a magnetic field component in a specific direction, and a soft magnetic substance film disposed on the lower main surface of the first support substrate and extending in a direction parallel to the magnetization direction of the magnet.

A position detection device includes a magnetic field generator and a magnetic sensor. The magnetic field generator is configured so that a mode of variation of a direction of a target magnetic field relative to variations in a position of a lens is such that the direction of the target magnetic field varies nonlinearly relative to the variations in the position of the lens. The magnetic sensor is configured so that a mode of variation of a detection signal relative to variations in the direction of the target magnetic field is such that the detection signal varies nonlinearly relative to the variations in the direction of the target magnetic field.

A magnetic sensor module includes an axially polarized back bias magnet having a body that radially extends from an inner sidewall to an outer sidewall and a bore that defines the inner sidewall. The magnet generates a radially symmetric bias magnetic in-plane field about a center axis in a sensor plane. The magnetic field has a magnetic flux density of substantially zero along the extension of the center axis and at a circumference of a zero-field circle located in the sensor plane, where the circumference of the zero-field circle vertically overlaps with the magnet body in a plan view. The magnetic sensor module includes a magnetic sensor including at least three sensor elements arranged in the sensor plane at locations where the radially symmetric bias magnetic in-plane field has a magnetic flux density of substantially zero, including at least two sensor elements being arranged on the circumference of the zero-field circle.

A magnetic field sensor has a plurality of magnetic field sensing elements and operates as a motion detector for sensing a rotation or other movement of a target object.

This invention describes a small sized precision displacement sensor at sub-micron accuracy level with a cost of a fraction of those of existing commercial devices. The basic concept of the new sensor system is to apply a mechanical mechanism to magnify a sub-micron displacement to be measured so that the magnified displacement becomes within the measurement range of a low cost sensor such as a Hall sensor.