EP2802930A1 - Dispositif téléoptique à stabilisation d'image - Google Patents

Dispositif téléoptique à stabilisation d'image

Info

Publication number
EP2802930A1
EP2802930A1 EP13700037.8A EP13700037A EP2802930A1 EP 2802930 A1 EP2802930 A1 EP 2802930A1 EP 13700037 A EP13700037 A EP 13700037A EP 2802930 A1 EP2802930 A1 EP 2802930A1
Authority
EP
European Patent Office
Prior art keywords
stabilization
housing
stabilization system
frequency
passive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13700037.8A
Other languages
German (de)
English (en)
Inventor
Kurt Becker
Christian Bach
Georg Guenther
Dirk Dobermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Zeiss AG
Carl Zeiss Sports Optics GmbH
Original Assignee
Carl Zeiss AG
Carl Zeiss Sports Optics GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carl Zeiss AG, Carl Zeiss Sports Optics GmbH filed Critical Carl Zeiss AG
Publication of EP2802930A1 publication Critical patent/EP2802930A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/16—Housings; Caps; Mountings; Supports, e.g. with counterweight
    • G02B23/18—Housings; Caps; Mountings; Supports, e.g. with counterweight for binocular arrangements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/644—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for large deviations, e.g. maintaining a fixed line of sight while a vehicle on which the system is mounted changes course
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors

Definitions

  • the invention relates to a remote-optical device, comprising at least one optical channel having a housing and an array of optical elements, wherein at least one of the optical elements for image stabilization in case of disturbing movements of the housing is movable relative to the housing, and with a first passive, mass inertia-based stabilization system for the at least one movable optical element that generates a first restoring force proportional to the deflection and a second restoring force proportional to the deflection speed when the at least one optical element is displaced relative to the housing, the first stabilizing system for image stabilization in the event of disturbing movements in a first frequency range is designed.
  • a far-optical device is known from the document DE 38 43 776 AI.
  • a far-optical device of the type mentioned in the sense of the present invention may be a monocular or binocular telescope, in particular a pair of binoculars.
  • the far-optical device has two optical channels.
  • disturbing movements of the housing of the long-range optical device affect the image quality of the image seen by the user negative.
  • the disturbing movements acting on the housing lead to a blurring of the image, which disturb the observation of an object or a scene.
  • the disturbing movements acting on the housing may have different causes, which differ with respect to their frequency spectrum.
  • Another cause of jamming movements are external influences, such as a fluctuating or vibrating ground of a land, water or aircraft. Such perturbations may have a frequency spectrum that is below the frequency spectrum of hand shake, ie that may include frequencies below 4 Hz to near 0 Hz. Noise movements, which have a frequency spectrum below about 4 Hz, are referred to in the present description as low-frequency jamming movements.
  • Fig. 1 the frequency spectrum of jamming movements is shown schematically, which can act on a far-optical device, ie on the housing.
  • Fig. 1 the amplitude A of the jamming movements against the frequency f is plotted.
  • the low-frequency frequency range is denoted by f N and the high-frequency frequency range by f H.
  • the frequency f 0 is here to indicate the boundary between the low-frequency frequency range and the high-frequency frequency range. It is understood that the frequency f 0 does not necessarily have to be 4 Hz, but in a range between about 2 Hz and about 5 Hz.
  • the housing at least one optical element of the arrangement of optical elements to store relative to the housing movable.
  • this at least one optical element is the image inversion system.
  • the image inversion system has a passive inertia based stabilization system.
  • the stabilization system comprises, on the one hand, a spring joint, via which a carrier, with which the image reversal system is firmly connected, is movably mounted relative to the housing, and, on the other hand, an attenuator, which is designed as an eddy current attenuator and which likewise acts between the carrier and the housing ,
  • the spring joint has two rotational degrees of freedom, one about a horizontal axis of the far-optical device and one degree of freedom about the vertical axis of the far-optical device.
  • the movable mounting and damping of the movement of the image reversing system relative to the housing cause interference affecting the housing is not or less transferred to the image reversal system, but this is more or less held in a rest position, whereby the image by the user is considered stabilized.
  • a passive, inertia-based stabilization system can be represented by a mechanical equivalent circuit diagram according to FIG. 2 shows a mechanical equivalent circuit diagram of a passive inertia-based stabilization system 200 for an optical element 202.
  • the optical element 202 is attached to a carrier 204, which in turn is mounted on a bearing 206, with a first restoring force 208 proportional to the carrier for the deflection of the carrier 204 and a second restoring force 210 proportional to the deflection speed acts.
  • the function of the bearing 206 and the first restoring force 208 is fulfilled by the spring joint and the second restoring force 210 by the eddy current damping member.
  • Fig. 3 is a curve showing the dependence of the degree of stabilization S of the frequency f in the frequency range above 1 Hz of a far-optical device, as is known in the prior art and has a passive stabilization system based on inertia.
  • a degree of stabilization of above 80% is achieved in the known long-range optical device at frequencies above 6 Hz, while the degree of stabilization at lower frequencies, especially from 4 Hz and below, drops significantly.
  • a passive inertia-based stabilization system is capable of providing effective image stabilization in jitter, such as hand tremors, while not providing effective image stabilization in jitter, such as low frequency moving surfaces.
  • the stabilization behavior below 1 Hz is not shown in FIG.
  • the manipulated variables restoring force proportional to the deflection and restoring force proportional to the deflection rate to modify so that an effective image stabilization is made possible for disturbing movements in the low-frequency range.
  • the invention is therefore based on the object, a far-optical device of the type mentioned, which has a passive, based on inertia stabilization system, to the effect that it also allows effective image stabilization at disturbing movements in the low-frequency target frequency range.
  • this object is achieved with respect to the aforementioned device by at least a second stabilization system, which is coupled to the first stabilization system and is designed for image stabilization against interference in at least a second frequency range, wherein the first and the at least one second frequency range at least partially are different.
  • the remote optical device according to the invention thus continues to be of a type that has a passive, based on inertia stabilization system that generates a restoring force proportional to the deflection and a restoring force proportional to the deflection speed.
  • the far-optical device according to the invention has at least a second stabilization system, which is coupled to the first stabilization system and designed for image stabilization against interference in at least a second target frequency range, so that filtered with the at least one second stabilization system such Störschulsfrequenzen which the first passive inertia-based stabilization system is not effective or not sufficiently effective.
  • the first stabilization system can preferably be designed for image stabilization in the case of hand shakes, while the second stabilization system is designed for image stabilization in the case of interference movements by moving surfaces (helicopter, vehicle, boat).
  • the at least one second stabilization system does not act independently of the first stabilization system on the movement of the at least one optical element, but indirectly via a coupling of the second stabilization system to the first stabilization system.
  • the at least two stabilization systems are effective or to which they are designed for image stabilization
  • frequency ranges are to be understood in which the at least two stabilization systems are exclusively effective, but the stabilization systems are in These frequency ranges are particularly effective in terms of image stabilization. Frequency bands are therefore always objective in this sense.
  • the one stabilization system is thus particularly effective in a first target frequency range, for example in the high-frequency frequency range, and the at least one further stabilization system is particularly effective in at least one second target frequency range, for example in the low-frequency frequency range.
  • the remote optical device according to the invention can be produced more compact and less expensive in contrast to those with purely active, electronic image stabilization systems.
  • one of the at least two frequency ranges has frequencies in the range of about 0 Hz to about 20 Hz, preferably in the range of about 2 Hz to about 10 Hz, more preferably in the range of about 3 Hz to about 7 Hz ,
  • the at least one second stabilization system is a passive mass inertia-based stabilization system.
  • the at least two stabilization systems can work in total without power.
  • no power supply is required, whereby the long-distance optical device requires no voltage source.
  • more than two passive stabilization systems can be coupled together.
  • the at least one second stabilization system generates, when the at least one optical element is deflected relative to the housing, a third restoring force proportional to the deflection and / or a fourth restoring force proportional to the deflection speed.
  • At least three, possibly at least four manipulated variables which preferably can be adjusted independently of each other so that image stabilization is made possible both in the low-frequency target frequency range and in the high-frequency target frequency range.
  • the at least one optical element is attached to a first carrier, which is coupled via a first spring joint, which generates the first restoring force, with at least one second carrier movable relative thereto, wherein the at least one second carrier via at least one second spring joint, which generates the third restoring force is coupled to the housing relative to this movable.
  • the at least two stabilization systems which are designed as passive, based on inertia stabilization systems, coupled to each other via a spring joint, whereby an easy-to-implement coupling between the at least two stabilization systems is made possible.
  • the at least two carriers are connected to one another in the sense of two coupled oscillatory systems.
  • first and the at least one second spring joint generate different restoring forces.
  • the two spring joints can be adjusted individually in terms of their spring characteristic.
  • the first stabilization system, a first attenuator, which generates the second restoring force, and the at least one second stabilization system at least a second attenuator, which generates the fourth restoring force, wherein the first and the at least one second attenuator preferably have a different damping behavior.
  • the damping properties or the restoring forces proportional to the Auslenkungs are advantageously to the desired image stabilization both disturbances in the low-frequency range and can be adjusted or adjusted in the high-frequency frequency range.
  • first attenuator between the first carrier and the housing and the second attenuator between the second carrier and the housing acts.
  • the at least one second stabilization system is an active stabilization system based on electronically controlled actuators, the actuators acting on the first stabilization system.
  • the long-range optical device has at least two stabilization systems, one of which is passive and one active.
  • the actuator system does not act directly on the at least one movable optical element or its carrier in the long-range optical device according to the invention, but acts on the optical system passive, inertia-based stabilization system.
  • the electronically controlled actuator acts on the first restoring force proportional to the deflection, for example by the actuator actively changes the angular position of the optical element or its carrier, or modifies the first restoring force proportional to the deflection by the spring stiffness of the spring joint
  • the actuator can act on the passive stabilization system by the restoring force is actively changed in proportion to the deflection speed.
  • the passive stabilization system includes an eddy current attenuator
  • the actuator system may modify the eddy current brake damping parameters (magnetic field strength, induced current strength, etc.).
  • the active stabilization system acts on the passive stabilization system and this overall system is then additionally actively stabilized.
  • the second frequency range has frequencies in the range of about 0 Hz to about 20 Hz , preferably in the range of about 2 Hz to about 10 Hz, more preferably in the range of about 3 Hz to about 7 Hz.
  • the first passive stabilization system is suitably designed to effect image stabilization in high-frequency jamming movements such as hand shake, while the second stabilization system causes image stabilization at low-frequency jamming movements such as moving or vibrating surfaces.
  • the at least one optical element is attached to a carrier, which is coupled via a spring joint, which generates the first restoring force, with the housing relative to this movable, and the actuator has at least one actuator which is arranged between the housing and the spring joint in order to adjust the spring joint for image stabilization against interference movements in the low-frequency frequency range with respect to its position relative to the housing.
  • the actuator of the active stabilization system moves the spring joint and thus tilts this relative to the housing.
  • the passive stabilization system hardly reacts to low-frequency interference movements, the compensatory movements generated by the active stabilization system are transmitted from the spring joint to the optical element or its carrier.
  • Such a way of coupling the active stabilization system to the passive stabilization system is advantageously easy to implement and does not require much additional space.
  • the passive stabilization system on an attenuator, which has at least a first damping element which communicates with the housing, and at least a second damping element, which is in communication with the at least one optical element, and the Actuator adjusts the relative position between the at least one damping element and the at least one second damping element for image stabilization against interference in the low-frequency frequency range.
  • This embodiment also represents a structurally simple measure of how the actuator system of the active stabilization system can act on the manipulated variable restoring force proportional to the deflection speed in order to modify this restoring force so that image stabilization is made possible with low-frequency interference movements.
  • the passive stabilization system has an attenuator which has at least two damping elements which are in communication with the housing or with the optical element, and the actuator system adjusts the relative position between the anti-jamming movements in the low-frequency frequency range for image stabilization at least two damping elements.
  • the actuator between a housing-side damping element and an optical element-side damping element acts, acts in this embodiment, the actuator between two damping elements, which are either both connected on the housing side, or both are connected opticsement heater.
  • This embodiment can be implemented in a structurally simple way. It is understood that this embodiment can be combined with the aforementioned embodiment.
  • the attenuator is formed as an eddy current damping member.
  • Eddy current attenuators have proven to be particularly suitable in passive stabilization systems, because they work in particular non-contact and thus frictionless, and because their damping properties are defined adjustable in a manageable manner by the geometry of the magnets and / or the eddy current plate.
  • the at least one second stabilization system has a sensor system for detecting the disturbing movements, and an evaluation unit which determines the deflections and deflection speeds from signals of the sensor system, wherein the evaluation unit controls the actuators.
  • the evaluation unit evaluates the interference movements detected by the sensor with regard to their frequency spectrum.
  • This measure has the advantage that on the basis of the evaluation of the frequency spectrum of the interfering movements detected by the sensor, the evaluation unit can determine whether the detected disturbing movement is a low-frequency interfering movement or a high-frequency interfering movement.
  • the advantage of this measure is that the actuator does not need to be controlled when the evaluation of the frequency spectrum of the detected by the sensor interference results that it is high-frequency noise movements such as hand tremors, already reacts to the passive stabilization system very well so that the actuator system of the active stabilization system can remain de-energized in this case.
  • This advantageously avoids, in contrast to the known long-range optical devices, the active stabilization. does not have to flow constantly, which in turn has the advantage that the voltage source (battery or battery) for the active stabilization system discharges less quickly. Only when the evaluation of the frequency spectrum shows that the interference movements detected by the sensor are low-frequency interference movements, the evaluation unit controls the actuators to respond to these low-frequency interference movements in the sense of image stabilization.
  • the sensor system can also detect at least one position sensor for detecting the angular position of the carrier of the at least one optical element relative to the housing.
  • the active stabilization system for a pure hands-free observation without movement or vibration of the ground can also be deactivated by the user.
  • Fig. 1 is a graph showing amplitudes of perturbations that can act on a housing of a long-range optical device as a function of frequency;
  • Fig. 2 is an equivalent circuit diagram of a passive, based on inertia
  • Fig. 3 shows the degree of stabilization against jamming as a function of the frequency of the jamming movements that can act on the housing of the far-optical device when the far-optical device has a passive, inertia-based stabilization system, Fig. 3 shows the degree of stabilization only in the section of the frequency spectrum of 1 Hz to 13 Hz;
  • FIG. 4 shows the basic structure of a remote-optical device with a single passive, inertia-based stabilization system.
  • FIG. 5 shows the basic structure of a long-range optical device having two passive, inertia-based stabilization systems coupled together;
  • FIG. 6 a a sectional view in a plane parallel to the direction of light propagation
  • FIG. 6 b a front view in the direction of light propagation
  • FIG. 6 b a diagram of the coupling of two passive inertia-based stabilization systems according to FIG. 5 in the region of the mounting of the at least one movable one optical element
  • 7 shows the diagram in longitudinal section parallel to the light propagation direction of the coupling of two passive inertia-based stabilization systems, wherein in addition to FIGS. 6 a) and b) the two passive mass inertia-based stabilization systems with attenuators are illustrated;
  • FIG. 8 shows three curves which illustrate the stabilization behavior of two individual passive inertia-based stabilization systems and the stabilization behavior of the total stabilization system resulting from the combination of two passive inertia-based stabilization systems as a function of the frequency, the stabilization behavior being similar only in a section of the frequency range to Fig. 3;
  • FIG. 9 is an equivalent circuit diagram of a passive inertia based stabilization system combination with an active electronically controlled actuator based stabilization system coupled to the passive stabilization system;
  • FIG. 10 shows three curves illustrating the stabilization behavior of a passive inertia-based stabilization system, an active electronically controlled actuation-based stabilization system, and the stabilization behavior of the resulting coupling versus frequency;
  • FIG. IIa a longitudinal section along the Lichtausbrei tion- direction and Fig. IIb) shows a front view in the light propagation direction;
  • FIG. 12a) is a view corresponding to FIG. IIa) and FIG Fig. IIb) shows;
  • FIG. 13 shows a further scheme of a coupling of passive and active stabilization system in the region of the attenuator a) and b) of the passive stabilization system in two views corresponding to FIG. IIa) and b);
  • Fig. 14 is yet another schematic of a passive and active coupling
  • Fig. 15 is a block diagram of an active stabilization system.
  • the long-range optical device represented by the general reference numeral 220 has an optical channel 222 in which an array of optical elements 224, 226 and 228 is disposed.
  • the optical elements 224, 226 and 228 are simplified here, with the optical element 224 forming the objective, the optical element 228 forming the eyepiece, and the optical element 226 forming the image inversion system of the far-optical device 220.
  • the long-range optical device 220 is a binocular telescope, in particular binoculars, it has correspondingly two optical channels 222, of which only the one channel is shown here.
  • the optical channel 222 has a housing 230 in which the arrangement of the optical elements 224, 226 and 228 is accommodated.
  • the optical element 226 (image inversion system) is movable relative to the housing 230.
  • a coordinate system xyz is plotted in the optical channel 222, where z denotes the light propagation axis within the optical channel 222, x the horizontal axis and y the vertical axis, the latter extending perpendicular to the plane of the drawing.
  • the optical element 226 is mounted for image stabilization about the x-axis and the y-axis pivotable in the housing 230.
  • the optical element 224 and the optical element 228 are fixed relative to the housing 230.
  • the movable optical element 226 is fixedly connected to a carrier 232, wherein the carrier 232 is pivotable about the aforementioned x-axis and the aforementioned y-axis.
  • the first member 234a upon deflection of the optical element 226 relative to the housing 230, generates a first restoring force (restoring force 208 in FIG. 2) proportional to this deflection.
  • the first member 234a is as Spring joint 236 is formed, which has a rotational degree of freedom about the x-axis and a rotational degree of freedom about the y-axis.
  • the spring joint 236 has, on the one hand, an interface 238 to the housing 230 and an interface 240 to the carrier 232 and thus to the optical element 226.
  • the first member 234a of the stabilization system 234 thus forms the bearing 206 according to the mechanical equivalent circuit diagram according to FIG. 2 and generates the restoring force 208 proportional to the deflection.
  • the second member 234b of the stabilization system 234 is formed as an attenuator 242, which generates a second restoring force in proportion to the deflection speed at a deflection of the optical element 226 and the carrier 232 relative to the housing 230.
  • the attenuator 238 has an interface 240 to the housing 230, the damping elements 244, for example, magnets 243, and an interface 246 to the support 232 and thus to the optical element 226 having, for example, an eddy current plate, which forms an eddy current damping member with the magnets 242.
  • the second member 234b thus generates the second restoring force 210 in proportion to the deflection speed of the deflection of the optical element 226 relative to the housing 230.
  • the stabilization behavior of the stabilization system 234 in the frequency range f H according to FIG. 1 at frequencies f greater than or equal to about 4 Hz, which correspond to the frequencies of hand shake, is good, while the stabilization behavior at frequencies below about 4 Hz
  • Image stabilization during interference movements of the housing 230 in the low-frequency frequency range f N is only inadequate or even impossible.
  • Fig. 5 shows an embodiment of a long-range optical device 10, in which two passive, inertia-based stabilization systems are coupled together.
  • the device 10 has at least one optical channel 12, which has a housing 14 and an arrangement of optical elements 16, 18 and 20.
  • the optical element 18 is, as in the known long-range optical device 220 shown in FIG. 4, about the x-axis and the y-axis, i. about the horizontal axis and about the vertical axis of the long-range optical device 10 pivotally mounted and thus movable to the housing 14 in this.
  • the movable optical element 18 (image inversion system) is fixed to a first carrier 22, which is pivotally mounted in the housing 14 about the aforementioned x-axis and the y-axis mentioned above.
  • the first carrier 22 is connected to a second carrier 24, which is also mounted in the housing 14 about the x-axis and the y-axis pivotally.
  • the long-range optical device 10 comprises a first passive inertia-based stabilization system 26 and a second, likewise passive, inertia-based stabilization system 28.
  • the first stabilization system 26 has a first member 26a and a second member 26b.
  • the first member 26a is formed as a spring joint 30 with the above-described two rotational degrees of freedom about the x-axis and the y-axis and has an interface 32 to the housing 14 and an interface 34 to the first support 22 and thus to the optical element 18 on.
  • the second member 26b of the stabilization system 26 is formed as an attenuator 36 and has an interface to the housing 14 having damping elements 38, which are formed for example as magnets 40, and an interface 42 to the second carrier 24 and via this to the first Carrier 22 and via this to the optical element 18.
  • the interface 42 is formed for example as eddy current plate, which forms an eddy current damping member with the magnet 40 of the interface 38.
  • the second stabilization system 28 has a first member 28a and a second member 28b.
  • the first member 28a has a spring joint 44 with rotational degrees of freedom about the x-axis and the y-axis.
  • the spring joint 44 has an interface 46 to the first carrier 22 and thus to the movable optical element 18, and an interface 48 to the second carrier 24 and thus via the spring joint 30 to the housing 14th
  • the optical element 18 of the long-range optical device 10 is thus via the spring joint 44 not directly connected to the housing 14, but via interposition of the further spring joint 30.
  • the two passive stabilization systems 26 and 28 are thus coupled together.
  • the second member 28b of the second stabilization system 28 has an attenuator 50 with an interface in the form of two damping elements 52 to the housing 14, which for example have magnets 54, and an interface 56 to the first support 22 and thus to the optical element 18, wherein
  • the interface 56 includes an eddy current plate that forms an eddy current attenuator with the magnets 54.
  • the attenuator 50 does not act directly between the first carrier 22 and the housing 14, but between the first carrier 22 and the second carrier 24, or the attenuator 36th instead acts directly between the second carrier 24 and the housing 14 between the second carrier 24 and the first carrier 22.
  • the first stabilizing system 26, upon deflection of the optical element 18 relative to the housing 14, upon deflection of the optical element 18 relative to the housing 14, generates a first restoring force proportional to this displacement and a second restoring force proportional to the deflection speed of that displacement, and the second stabilizing system 28 generates a third restoring force proportional to the displacement or the remaining Deflection of the optical element 18 and / or a fourth restoring force proportional to the deflection speed or the remaining deflection speed of this deflection.
  • Fig. 6a shows a simplified schematic diagram of the coupling of the two stabilizing systems 26 and 28 in the region of their first members 26a and 28a, which form the bearing of the optical element 18 and generate the restoring forces proportional to the deflection of the optical element 18.
  • the power flow goes via the interface 34 to the interface 46 and from there to the interface 48, which represents the interface to the optical element 18.
  • Fig. 6b schematically shows the first member 26a in a front view in the direction of light propagation (perpendicular to the plane of the drawing), i. E. in the xy plane with the interfaces 32, 34 and the second carrier 24.
  • Fig. 6b and the springs 56 and 58 of the spring joint 30 are drawn, in Fig. 5, only the springs 56 can be seen.
  • the springs 56 allow rotation about the x-axis, and the springs 58 rotate about the y-axis.
  • the spring joint 44 is constructed accordingly.
  • Fig. 7 shows a diagrammatically simplified diagram of the coupling of the stabilization systems 26 and 28 of the long-range optical device 10 with a view corresponding to Fig. 6a), wherein now the second members 26b and 28b are shown.
  • Spring hardening of the spring joint 30 on the one hand and the spring joint 44 on the other hand can be designed or adjusted differently.
  • the attenuation characteristics of the attenuators 36 and 50 of the two stabilization systems 26 and 28 may be different.
  • Fig. 8 shows for the long-range optical device 10 three curves of the degree of stabilization S of the image stabilization function of the frequency f of acting on the housing 14 jamming movements, the curves are shown only in a section of the entire possible frequency range.
  • a curve Si represents the stabilization behavior as a function of the frequency f, for example the first stabilization system 26 and a curve S2 corresponding to the stabilization behavior as a function of the frequency of the second stabilization system.
  • the stabilization behavior of the two stabilization systems 26 and 28 for image stabilization has been set to different frequency ranges, ie the first stabilization system 26 responds better to high-frequency interference movements, and the stabilization system 28 rather to low-frequency interference movements.
  • a curve S3 shows the resulting stabilization behavior of the overall stabilization system comprising the first stabilization system 26 and the second stabilization system 28.
  • At least two passive, inertia-based stabilization systems are coupled together to allow image stabilization in noise movements in both low-frequency and high-frequency range
  • at least one passive, based on inertia Stabilization system is coupled to at least one active, based on electronically controlled actuator-based stabilization system
  • the basic principle is that the active stabilization system acts on the force units of the passive stabilization system.
  • FIG. 9 schematically shows an optical element 60 which is movable in a remote optical device 58 for image stabilization in the event of disturbing movements relative to the housing of the long-range optical device.
  • the optical element 60 is fastened to a carrier 62, which is mounted pivotably on a bearing 64 about the abovementioned x- and y-axis, so that the optical element 60 can also be pivoted about these two axes.
  • the bearing 64 is part of a passive inertia-based stabilization system 66 which generates a first restoring force 68 proportional to the deflection of the optical element 60 and a second restoring force 70 proportional to the deflection speed of the deflection of the optical element 60.
  • the far-optical device 58 is identical to the long-range optical device 200 in FIG. 2 and the long-distance optical device 220 in FIG. 4, respectively.
  • an active stabilization system 72 based on electronically controlled actuators is coupled to the first passive stabilization system 66.
  • An arrow 74 indicates that the active stabilization system 72 acts on the first restoring force 68 for image stabilization in the event of disturbances in the low-frequency frequency range, and an arrow 76 illustrates an action of the active stabilization system 72 on the second restoring force 70 proportional to the deflection speed ,
  • the stabilization behavior of the far-optical device 58 can be changed.
  • FIG. 10 shows a first curve Si illustrating the frequency-dependent degree of stabilization S of the passive inertia-based stabilization system 66.
  • a curve S2 illustrates the stabilization behavior or the degree of stabilization S of the active stabilization system 72 as a function of the frequency f.
  • the active stabilizing system 72 is substantially effective in disturbing movements in the low-frequency frequency range.
  • a curve S3 the overall stabilization behavior of the combination of passive stabilization system and active stabilization system is shown, it being evident from the course of curve S3 that, unlike the passive stabilization system alone, image stabilization is now additionally effected in the low-frequency frequency range.
  • the action of the active, electronically controlled actuator-based stabilization system 66 on the passive stabilization system can be of various types.
  • the term “actuatorics” is to be understood generally.
  • the active stabilization system 66 acts on the first restoring force in proportion to the deflection produced by the passive stabilization system 66 in such a way that the actuator modifies the angular position of the carrier 62, and / or Restoring force 68 is modified by biasing the spring constant of the passive stabilizer spring assembly, etc.
  • Actuation of active stabilization system 72 on second restoring force 70 proportional to the displacement velocity produced by the passive stabilization system may be accomplished in a modification of eddy current attenuator 238 in FIG Fig. 4 by geometric variation, for example, the distance of the magnets 242, the position of the metal plate 244, the position of the magnets 242, by influencing the material of the magnets 242 or by induction, etc. act, as will be described below.
  • the Embodiments of the long-range optical device 220 in FIG. 4 described below with a coupling of an active stabilization system to the already existing passive stabilization system 234 are described below.
  • FIG. 11 shows parts associated with parts of the far-optical device 220 in Fig. 11a 4 are identical or identical, are given the same reference number as in FIG.
  • Fig. IIa shows the first member 234a of the passive stabilization system 234.
  • the first member 234a of the passive stabilization system 234 is designed as a spring joint, wherein Fig. IIa) the spring joint in section parallel to the z-axis in Fig. 4 and Fig. IIb) shows the spring joint 236 in a front view in the xy plane.
  • Fig. IIb also shows springs 248 and 250 which define the two rotational degrees of freedom of the spring hinge 236 about the x-axis and the y-axis.
  • springs 248 and 250 which define the two rotational degrees of freedom of the spring hinge 236 about the x-axis and the y-axis.
  • Fig. IIa) and in Fig. 4 are corresponding to the longitudinal sectional view, only the springs 248 can be seen.
  • the spring joint 236 is coupled via the interface 238 directly to the housing 230, the spring joint 236 according to Fig. I Ia) and b) with the housing 230 via actuators 252 and 254th connected.
  • the actuators 252 and 254 are arranged between the housing 230 and the spring joint 236, wherein the actuators 252 and 254 adjust the spring joint for image stabilization against interference in the low-frequency frequency range with respect to its position relative to the housing 230.
  • the actuators 252 serve to adjust the spring joint 236 relative to the housing 230 about the x-axis, and the actuators 254 corresponding to the adjustment of the spring joint 236 relative to the housing 230 about the y-axis.
  • the spring joint 236 For image stabilization in the event of disturbing movements in the low-frequency range, the spring joint 236 is thus actively moved and tilted relative to the housing 230. Since the first passive stabilization system 234 hardly reacts to low-frequency jamming movements, the compensatory movements generated by the active stabilization system 72 are transmitted from the spring joint 236 to the carrier 232 and thus to the optical component 226 (see FIG. 4).
  • Figures 12a) and b) now show how the active stabilization system 72 acts on the second member 234b of the passive stabilization system 234 to vary the second restoring force in proportion to the rate of deflection in deflection of the optical member 226 relative to the housing 230. to achieve image stabilization in the event of disturbing movements in the low-frequency frequency range.
  • the interface 246, which is formed as eddy current plate, is rigidly connected to the carrier 232
  • the interface 246, also in the form of an eddy current plate, with the support 232 is not rigid, but connected via an actuator 258 an actuator of the active stabilization system 72.
  • This coupling of the active stabilization system 72 to the second member 234b of the passive stabilization system 234 enables active control of the relative movement between the eddy current plate 246 and the magnets 243.
  • the relative movement between the eddy current plate 246 and the magnets 243 may be rigid with the carrier 232 coupled eddy current plate 246 can be increased or decreased, whereby the attenuation caused by the attenuator 242 of the passive stabilization system 234 can be increased or decreased.
  • FIGS. 13 a) and b) show a further exemplary embodiment which can be used in combination with the exemplary embodiment in FIG. 12 or in isolation and in which the actuator system of the active stabilization system has at least one actuator 260 which is located between the magnets 243 the second member 234b of the passive stabilization system 234 and the housing 230 is arranged, wherein via the at least one actuator 260, the relative movement between the magnet 243 and the metal plate 246 can be actively controlled, analogous to the embodiment in FIG.
  • a possible direction of movement of the metal plate 246 caused by the actuator 258 is illustrated with a double arrow 262
  • a double arrow 264 in Fig. 13a) illustrates the movement of the at least one actuator 260 caused by the at least one actuator 260 Magnets 243 relative to the housing 230.
  • the active stabilization system 72 may include an actuator having at least one actuator 268 that actively changes a distance d between the magnets 243 of the attenuator 242 of the passive stabilization system 234 by the actuator Actuator 268 moves the magnets 243 toward or away from each other. By this movement, the magnetic field density and thus the attenuation of the attenuator 242 is changed.
  • the active stabilization system 72 which is based on electronic control actuators, has a sensor system for detecting the disturbing movements acting on the housing 230, as well as an evaluation unit which determines the detected deflections and deflection speeds from signals of the sensor system, wherein value unit then controls the actuators 252, 254, 258, 260 and / or 268 in order to effect image stabilization in the low-frequency frequency range.
  • a sensor system 80 which has, for example, one or more sensors 82 connected to the housing 230, detects movements of the housing 230, sometimes also interference movements.
  • the signals generated by the sensor 80 are fed to an evaluation unit 84, which determines from the signals of the sensor 80 the detected deflections and deflection speeds resulting from the movements of the housing 230.
  • the evaluation unit 84 then controls the actuator 86 of the active stabilization system 72 in accordance with the image stabilization.
  • the evaluation unit 84 is designed, in particular, to evaluate the interference movements detected by the sensor system 80 with regard to their frequency spectrum (see FIG. 1). The evaluation unit 84 then activates the actuator system 86 when the frequency spectrum of the disturbance movements evaluated by the evaluation unit 84 contains frequencies against which the passive stabilization system 234 is substantially ineffective. In this way, the active stabilization system 72 does not have to be permanently active or the actuator 86 does not have to be permanently charged with voltage, but only in the event that the evaluation unit 84 detects disturbing movements whose frequencies are at least also in the low-frequency frequency range.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Adjustment Of Camera Lenses (AREA)
  • Studio Devices (AREA)

Abstract

L'invention concerne un dispositif téléoptique (10), comprenant au moins un canal optique (12) qui présente un boîtier (14) et un dispositif d'éléments optiques (16, 18, 20), au moins l'un des éléments optiqes (16, 18, 20) étant mobile par rapport au boîtier (14), pour la stabilisation d'image, lors de mouvements parasites du boîtier (14), et un premier système de stabilisation passif (26), basé sur l'inertie de masse, pour le au moins élément optique mobile (18) qui, lors de la déviation du au moins élément optique (18) par rapport au boîtier (14), produit une première force de rappel, proportionnelle à la déviation, et une seconde force de rappel, proportionnelle à la vitesse de déviation, le premier système de stabilisation (26) étant conçu pour la stabilisation d'image, lors de mouvements parasites dans une oremière gamme de fréquence. Le dispositif téléoptique (10) présente au moins un second système de stabilisation (28), qui est couplé avec le premier système de stabilisation (26), et qui est conçu pour la stabilisation d'image vis-à-vis de mouvements parasites dans au moins une seconde gamme de fréquence, la première et la au moins seconde gamme de fréquence étant différentes, au moins partiellement.
EP13700037.8A 2012-01-13 2013-01-08 Dispositif téléoptique à stabilisation d'image Withdrawn EP2802930A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201261586321P 2012-01-13 2012-01-13
DE102012000857.0A DE102012000857B4 (de) 2012-01-13 2012-01-13 Fernoptische Vorrichtung mit Bildstabilisierung
PCT/EP2013/050175 WO2013104593A1 (fr) 2012-01-13 2013-01-08 Dispositif téléoptique à stabilisation d'image

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EP2802930A1 true EP2802930A1 (fr) 2014-11-19

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US (1) US9618769B2 (fr)
EP (1) EP2802930A1 (fr)
DE (1) DE102012000857B4 (fr)
WO (1) WO2013104593A1 (fr)

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DE102014105433B4 (de) 2014-04-16 2019-06-13 Martinmechanic Friedrich Martin Gmbh & Co. Kg LED-Handprojektorleuchte mit Bildstabilisator
CN105403991B (zh) * 2015-12-29 2018-08-17 中科院南京天文仪器有限公司 一种可移动式望远镜
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DE102012000857B4 (de) 2021-08-05
DE102012000857A1 (de) 2013-07-18
WO2013104593A1 (fr) 2013-07-18
US20140368911A1 (en) 2014-12-18
US9618769B2 (en) 2017-04-11

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