Long-range optical device having image stabilization
A long-range optical device has at least one optical channel, which has a housing and an arrangement of optical elements, wherein at least one of the optical elements is movable relative to the housing for image stabilization in the event of perturbing movements of the housing. The device further has a first passive stabilization system based on mass inertia for the at least one movable optical element, which, in the event of displacement of the at least one optical element relative to the housing, generates a first restoring force proportional to the displacement and a second restoring force proportional to the displacement velocity. The first stabilization system is designed for image stabilization in the event of perturbing movements in a first frequency range. The long-range optical device has at least one second stabilization system, which is coupled to the first stabilization system and is designed for image stabilization against perturbing movements in at least one second frequency range, wherein the first and the at least one second frequency ranges are at least partially different.
1. A long-range optical device, comprising:
at least one optical channel having a housing and an arrangement of optical elements;
at least one of the optical elements being movable relative to the housing for image stabilization in the event of perturbing movements of the housing;
a first passive stabilization system based on mass inertia and acting on the at least one movable optical element, the first passive stabilization system being configured to generate a first restoring force proportional to the displacement amplitude and a second restoring force proportional to the displacement velocity in the event of displacement of the at least one optical element relative to the housing, the first passive stabilization system being configured for image stabilization in the event of perturbing movements in a first frequency range;
at least one second stabilization system acting on the at least one movable optical element, the at least one second stabilization system coupled to the first stabilization system and configured for image stabilization against perturbing movements in at least one second frequency range, wherein the at least one second stabilization system is an active stabilization system based on an electronically controlled actuator system, wherein the actuator system acts on the first stabilization system, the first and the at least one second frequency ranges being at least partially different;
a carrier, the at least one optical element being fastened on the carrier; and
a spring joint for movably coupling the carrier to the housing, the spring joint generating the first restoring force, the actuator system having at least one actuator arranged between the housing and the spring joint, to adjust the spring joint with respect to its position relative to the housing for image stabilization against perturbing movements in the low-frequency frequency range.
2. The device of claim 1 , wherein one of the first and at least one second frequency ranges has frequencies in the range from approximately 0 Hz to approximately 20 Hz.
3. The device of claim 1 , wherein one of the first and at least one second frequency ranges has frequencies in the range from approximately 2 Hz to approximately 10 Hz.
4. The device of claim 1 , wherein one of the first and at least one second frequency ranges has frequencies in the range from approximately 3 Hz to approximately 7 Hz.
5. The device of claim 1 , wherein the first frequency range has frequencies above approximately 20 Hz, and the second frequency range has frequencies in the range from approximately 0 Hz to approximately 20 Hz.
6. The device of claim 1 , wherein the first frequency range has frequencies above approximately 10 Hz, and the second frequency range has frequencies in the range from approximately 2 Hz to approximately 10 Hz.
7. The device of claim 1 , wherein the first frequency range has frequencies above approximately 7 Hz, and the second frequency range has frequencies in the range from approximately 3 Hz to approximately 7 Hz.
8. A long-range optical device, comprising:
at least one optical channel having a housing and an arrangement of optical elements;
at least one of the optical elements being movable relative to the housing for image stabilization in the event of perturbing movements of the housing;
a first passive stabilization system based on mass inertia and acting on the at least one movable optical element, the first passive stabilization system being configured to generate a first restoring force proportional to the displacement amplitude and a second restoring force proportional to the displacement velocity in the event of displacement of the at least one optical element relative to the housing, the first passive stabilization system being configured for image stabilization in the event of perturbing movements in a first frequency range;
at least one second stabilization system acting on the at least one movable optical element, the at least one second stabilization system coupled to the first stabilization system and configured for image stabilization against perturbing movements in at least one second frequency range, wherein the at least one second stabilization system is an active stabilization system based on an electronically controlled actuator system, wherein the actuator system acts on the first stabilization system, the first and the at least one second frequency ranges being at least partially different, wherein the first passive stabilization system has a damping member having at least one first damping element connected to the housing, and at least one second damping element connected to the at least one optical element, the actuator system being configured to adjust the relative position between the at least one first damping element and the at least one second damping element for image stabilization against perturbing movements in the low-frequency frequency range.
9. The device of claim 8 , wherein the damping member is configured as an eddy current damping member.
10. The device of claim 8 , wherein one of the first and at least one second frequency ranges has frequencies in the range from approximately 0 Hz to approximately 20 Hz.
11. The device of claim 8 , wherein one of the first and at least one second frequency ranges has frequencies in the range from approximately 2 Hz to approximately 10 Hz.
12. The device of claim 8 , wherein one of the first and at least one second frequency ranges has frequencies in the range from approximately 3 Hz to approximately 7 Hz.
13. A long-range optical device, comprising:
at least one optical channel having a housing and an arrangement of optical elements;
at least one of the optical elements being movable relative to the housing for image stabilization in the event of perturbing movements of the housing;
a first passive stabilization system based on mass inertia and acting on the at least one movable optical element, the first passive stabilization system being configured to generate a first restoring force proportional to the displacement amplitude and a second restoring force proportional to the displacement velocity in the event of displacement of the at least one optical element relative to the housing, the first passive stabilization system being configured for image stabilization in the event of perturbing movements in a first frequency range;
at least one second stabilization system acting on the at least one movable optical element, the at least one second stabilization system coupled to the first stabilization system and configured for image stabilization against perturbing movements in at least one second frequency range, wherein the at least one second stabilization system is an active stabilization system based on an electronically controlled actuator system, wherein the actuator system acts on the first stabilization system, the first and the at least one second frequency ranges being at least partially different, wherein the first passive stabilization system has a damping member having at least two damping elements connected to the housing or to the optical element, the actuator system being configured to adjust the relative position between the at least two damping elements for image stabilization against perturbing movements in the low-frequency frequency range.
14. The device of claim 13 , wherein the damping member is configured as an eddy current damping member.
15. The device of claim 13 , wherein one of the first and at least one second frequency ranges has frequencies in the range from approximately 0 Hz to approximately 20 Hz.
16. The device of claim 13 , wherein one of the first and at least one second frequency ranges has frequencies in the range from approximately 2 Hz to approximately 10 Hz.
17. The device of claim 13 , wherein one of the first and at least one second frequency ranges has frequencies in the range from approximately 3 Hz to approximately 7 Hz.
18. A long-range optical device, comprising:
at least one optical channel having a housing and an arrangement of optical elements;
at least one of the optical elements being movable relative to the housing for image stabilization in the event of perturbing movements of the housing;
a first passive stabilization system based on mass inertia and acting on the at least one movable optical element, the first passive stabilization system being configured to generate a first restoring force proportional to the displacement amplitude and a second restoring force proportional to the displacement velocity in the event of displacement of the at least one optical element relative to the housing, the first passive stabilization system being configured for image stabilization in the event of perturbing movements in a first frequency range;
at least one second stabilization system acting on the at least one movable optical element, the at least one second stabilization system coupled to the first stabilization system and configured for image stabilization against perturbing movements in at least one second frequency range, wherein the at least one second stabilization system is an active stabilization system based on an electronically controlled actuator system, wherein the actuator system acts on the first stabilization system, the first and the at least one second frequency ranges being at least partially different, wherein the at least one second stabilization system has a sensor system for detecting the perturbing movements and an analysis unit configured to ascertain the displacement amplitudes and displacement velocities from signals of the sensor system, the analysis unit being further configured to activate the actuator system.
19. The device of claim 18 , wherein the analysis unit is configured to analyze the perturbing movements detected by the sensor system with respect to their frequency spectrum.
20. The device of claim 18 , wherein one of the first and at least one second frequency ranges has frequencies in the range from approximately 0 Hz to approximately 20 Hz.
21. The device of claim 18 , wherein one of the first and at least one second frequency ranges has frequencies in the range from approximately 2 Hz to approximately 10 Hz.
22. The device of claim 18 , wherein one of the first and at least one second frequency ranges has frequencies in the range from approximately 3 Hz to approximately 7 Hz.
23. The device of claim 19 , wherein the analysis unit is configured to activate the actuator system if the analyzed frequency spectrum of the perturbing movements contains frequencies against which the first stabilization system is essentially ineffective.