Riflescope adjustment systems
An adjustment assembly having a rotary encoder, riflescopes incorporating the same, and related methods are provided. In one example, an adjustment assembly includes a first rotational component configured to rotate about an axis, a first gear coupled with the first rotational component and a second gear coupled with the first rotational component. The assembly further includes an encoder. The encoder includes a position gear engaged with the first gear, the first gear and the position gear having a 1:1 gear ratio, and a revolution gear engaged with the second gear, the second gear and the revolution gear having a gear ratio other than 1:1, wherein the gear ratio of the second gear and the revolution gear independent of a ratio of the respective diameters of the second gear and the revolution gear. Sensors may determine the rotational positions of the position sensor and the revolution sensors.
1. A riflescope, comprising:
a main tube;
an objective system coupled to a first end of the main tube;
an ocular system coupled to a second end of the main tube;
an optical element disposed in the main tube;
an adjustment assembly operable to alter a position of the optical element relative to the main tube, the adjustment assembly comprising:
a rotational component configured to rotate about an axis;
a gear comprising gear teeth engageable with the rotational component;
a magnetized component integrally coupled to the gear at a gear location within a perimeter of the gear defined by the gear teeth; and
a sensor to sense a rotational position of the magnetized component, the rotational position of the magnetized component correlating to an angular displacement of the rotational component about the axis relative to a zero point.
2. The riflescope of claim 1 , wherein the magnetized component is at least partially disposed within the gear.
3. The riflescope of claim 1 , wherein the magnetized component rotates concentrically with the gear.
4. The riflescope of claim 1 , wherein the sensor is a Hall Effect sensor.
5. The riflescope of claim 1 , wherein the gear comprises a gear ratio between 12:1 and 1:12 with the rotational component.
6. The riflescope of claim 1 , wherein the magnetized component includes a diametrically magnetized gear portion formed as part of the gear itselfgear ratio comprises 12:1.
7. The riflescope of claim 1 , wherein the adjustment assembly forms part of an elevational turret, a windage turret, or a parallax dial assembly.
8. The riflescope of claim 1 , further comprising a knob at least partially housing the adjustment assembly, wherein the knob includes external markings correlating with a rotational position of the knob relative to the riflescope.
9. A riflescope, comprising:
a main tube;
an objective system coupled to a first end of the main tube;
an ocular system coupled to a second end of the main tube;
an optical element disposed in the main tube;
an adjustment assembly operable to alter a position of the optical element relative to the main tube, the adjustment assembly comprising:
a rotational component configured to rotate about an axis;
a drivable component in direct contact with an outer portion of the rotational component, wherein at least a portion of the drivable component is affixed with a magnet; and
a sensor to sense a rotational position of the magnet, the rotational position of the magnet correlating to an angular displacement of the rotational component about the axis relative to a zero point.
10. The riflescope of claim 9 , wherein the sensor is a first sensor and the adjustment assembly further comprises:
a magnetic element configured to translate along the axis relative to rotation of the rotational component; and
a second sensor to sense translation of the magnetic element, wherein translation of the magnetic element and displacement of the drivable component correlate to a total angular displacement of the rotational component.
11. The riflescope of claim 9 , wherein the sensor is disposed on a circuit board oriented generally parallel to the drivable component.
12. The riflescope of claim 9 , wherein the sensor is configured to detect a change in magnetic flux associated with the magnet.
13. The riflescope of claim 9 , further comprising an erector tube disposed within the main tube and coupled to the optical element, wherein the adjustment assembly further comprises a bolt extending through an opening in the main tube and contacting the erector tube.
14. The riflescope of claim 13 , wherein:
the bolt is configured to linearly translate along the axis relative to rotation of the rotational component; and
linear translation of the bolt is configured to move the erector tube relative to the main tube.
15. The riflescope of claim 9 , further comprising a control module and a display in communication with the control module, wherein:
the adjustment assembly is in electrical communication with the control module; and
the display presents indicia representative of a rotational position of the rotational component about the axis.
16. The riflescope of claim 9 , wherein the adjustment assembly is part of an elevational turret, a windage turret, or a parallax dial assembly.
17. The riflescope of claim 9 , wherein the drivable component comprises a gear.