JP2020008705A - Binocular - Google Patents

Abstract

To provide a binocular that has a hand tremor correction mechanism making a computation of a hand tremor simple by preventing a change in drive characteristic difference between right and left hand tremor correction mechanisms due to an amount of interpupillary adjustment, and enabling a control circuit to be simplified.SOLUTION: In a binocular capable of changing a relative position of a pair of right and left optical systems upon which light from an observed body is incident by rotating with an axis parallel with an optical axis of the optical system as a center, the binocular has: tremor detection means that detects tremors; and two image tremor correction means that are provided in both of the optical systems, and correct respective image tremors of the optical systems in response to an output of the tremor detection means. At least one of the two image tremor correction means is configured to rotate with an optical axis of the image tremor correction means as a center in response to a change in relative position of the optical system.SELECTED DRAWING: Figure 5

Description

  The present invention relates to binoculars, and more particularly to binoculars having a camera shake correction mechanism.

  2. Description of the Related Art Conventionally, various methods such as a variangle prism method, a gimbal method, a lens tilt method, and a lens shift method are known as methods of a camera shake correction mechanism mounted on optical devices such as binoculars and cameras.

  The anti-shake function of the binoculars using the lens shift method is to shift the anti-shake lens forming a part of the pair of optical systems in a direction perpendicular to the optical axis in a direction to cancel image shake due to the shake of the binoculars. Is achieved.

  In binoculars, since the optical images formed by the left and right optical systems are observed simultaneously by both eyes, the anti-vibration lenses are simultaneously and similarly shifted in the left and right optical systems.

  Here, a system for preventing image blur will be briefly described.

  The shake of the observer at the time of observation is generally a vibration of 1 Hz to 10 Hz as a frequency. As a basic idea for obtaining an observation image free from image blur even when such camera shake occurs during observation, the vibration of the optical device due to the camera shake is detected, and the correction lens or prism is displaced according to the detected value. I have to do it.

  Therefore, in order to enable observation in which image blur does not occur even if camera shake occurs, it is necessary to accurately detect the vibration of the optical device and correct the optical axis change due to camera shake.

  In principle, this vibration is detected by a vibration detection sensor having a shake detection sensor for detecting acceleration, angular acceleration, angular velocity, angular displacement, and the like, and a calculation unit for appropriately calculating the output for image blur correction. This can be performed by mounting the device on an optical device.

  Then, based on the detection information, a camera-shake correction mechanism for decentering the photographing optical axis is provided with a position detection unit for detecting the position of the camera-shake correction mechanism so as to have a target value calculated by the calculation unit based on the output of the detection information. Is provided and driven to perform image blur correction.

  As a binocular having a camera shake correction mechanism, Patent Document 1 discloses a configuration in which a Porro prism type optical system is adopted and a camera shake correction mechanism is arranged between an objective lens and a Porro prism.

  The camera shake correction mechanism disclosed in Patent Literature 1 can simultaneously and similarly drive the image stabilizing lenses by integrating the left and right camera shake correction mechanisms. For this reason, the interpupillary distance adjustment is performed by rotating the optical group including the Porro prism on the eyepiece lens side by the camera shake correction mechanism.

  On the other hand, in the binoculars adopting the roof prism type optical system, the optical path on the objective lens side and the eyepiece side becomes linear, so that the size and weight can be reduced. Also, when adjusting the interpupillary distance, if the objective lens and the eyepiece are moved together, the left and right optical systems can be connected by hinges. Since the cylinder for holding the system is independent, there is an advantage that the holdability is excellent.

  If the camera shake correction mechanism is mounted on the binoculars employing the roof prism type optical system while taking advantage of the above-mentioned advantages, the left and right camera shake correction mechanisms become independent, unlike the configuration of Patent Document 1. For this reason, when the interpupillary distance adjustment is performed, the relative relationship between the left and right hand shake correction mechanisms changes, so that it is necessary to independently perform the hand shake correction control.

  To cope with this, Patent Document 2 discloses a configuration in which camera shake correction control is performed based on a parameter corresponding to an output of a position change detection unit that detects a change in the relative relationship of the right camera shake correction mechanism.

JP-A-2006-29403 JP-A-8-62540

  However, in the related art disclosed in Patent Literature 2, since the left and right camera shake correction mechanisms are individually controlled, the calculation load is high, and the electric circuit may be complicated and expensive.

  Furthermore, in addition to the contents of Patent Document 2, it is necessary to add the relationship between the left and right optical systems and the direction of gravity to the calculation in order not to feel uncomfortable when observing with the binocular, and furthermore, the control and electric circuits are complicated and expensive. Could be.

  Therefore, an object of the present invention is to provide binoculars having a camera shake correction mechanism that can simplify calculations and simplify an electric circuit.

In order to achieve the above object, binoculars according to the present invention,
A pair of left and right objective optical systems into which light from the object to be observed enters,
An eyepiece optical system in which the optical axis is arranged at a position decentered from the optical axis of the objective optical system via the optical axis decentering means,
By rotating around an axis parallel to the optical axis of the objective optical system or the eyepiece optical system, binoculars that can change the relative position of the pair of left and right optical systems,
Shake detection means for detecting shake of the binoculars,
Two image blur correction means provided in both of the optical systems and correcting each image blur of the optical system in accordance with the output of the blur detection means,
At least one of the image blur correction means rotates around the optical axis of the image blur correction means in response to a change in the relative position of the optical system.

  According to the present invention, it is possible to provide binoculars having a camera shake correction mechanism that makes calculation of camera shake correction simple and can simplify a control circuit.

FIG. 1 is an external perspective view showing a first state of binoculars according to an embodiment of the present invention. FIG. 3 is an external perspective view showing a second state of the binoculars according to the embodiment of the present invention, which is adjusted from the first state to the direction in which the interpupillary distance is increased. 1. Top view of binoculars showing the first state of FIG. Top view of the binoculars showing the second state of FIG. FIG. 3 is a sectional view showing the first embodiment along the line AA in FIG. 3. FIG. 4 is a sectional view showing the first embodiment along the line BB in FIG. 4; FIG. 3 is a sectional view showing a second embodiment taken along line AA in FIG. 3. FIG. 4 is a sectional view showing the second embodiment along the line BB in FIG. 4;

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is an external perspective view showing a first state of the binoculars according to the embodiment of the present invention. FIG. 2 is an external perspective view showing a second state of the binoculars according to the embodiment of the present invention, which is adjusted from the first state to the direction in which the interpupillary distance is increased. FIG. 3 is a top view of the binoculars showing the first state of FIG. FIG. 4 is a top view of the binoculars showing the second state of FIG. FIG. 5 is a sectional view showing the first embodiment along the line AA in FIG. FIG. 6 is a sectional view showing the first embodiment along the line BB in FIG. FIG. 7 is a sectional view showing the second embodiment along the line AA in FIG. FIG. 8 is a sectional view showing the second embodiment along the line BB in FIG.

  Hereinafter, binoculars according to a first embodiment of the present invention will be described with reference to FIGS. 1, 2, 3, and 4.

  Reference numeral 1 denotes a left lens barrel in which an objective lens, an eyepiece, an erect prism (not shown), and a camera shake correction mechanism 7 described later are arranged.

  Reference numeral 2 denotes a right lens barrel, similar to the left lens barrel 1, in which an objective lens, an eyepiece, an erect prism (not shown), and a camera shake correction mechanism 8 described later are arranged. An arm 3 and an arm 4 extend from the outer periphery of the left lens barrel 1. Similarly, an arm 5 and an arm 6 extend from the outer periphery of the right lens barrel 2. The arm 3 and the arm 5 are connected by a hinge structure using the axis C as a rotation axis. Similarly, the arm 4 and the arm 6 are connected by a hinge structure having the axis C as a rotation axis.

  The axis C is provided so as to be parallel to the optical axis L of the left lens barrel 1 and the optical axis R of the right lens barrel 2. Thus, by rotating the left lens barrel 1 and the right lens barrel 2 about the axis C relatively, the distance between the optical axis L and the optical axis R is changed to adjust the interpupillary distance.

  FIG. 2 shows an adjustment made in the direction of increasing the interpupillary distance with respect to FIG. FIG. 3 is a top view of the binoculars in the state of FIG. 1, and FIG. 4 is a top view of the binoculars in the state of FIG. FIG. 5 is a sectional view showing the first embodiment along line AA in FIG. 3, and FIG. 6 is a sectional view showing the first embodiment along line BB in FIG. .

  The camera shake correction mechanism 7 and the camera shake correction mechanism 8 are configured to be driven in a plane orthogonal to the optical axis L and the optical axis R by a known voice coil motor using a coil and a permanent magnet.

  Reference numerals 9a and 9b denote angular velocity sensors serving as shake detecting means, which are arranged to detect shakes in two orthogonal directions.

  Reference numeral 10 denotes an acceleration sensor which is a gravitational direction detecting means.

  The camera shake correction mechanism 7 and the camera shake correction mechanism 8 are driven in a plane orthogonal to the optical axis L and the optical axis R based on the outputs of the angular velocity sensor 9 and the acceleration sensor 10, so that even if camera shake occurs, the image It is possible to obtain an observation image in which no shake occurs.

  Reference numeral 11 denotes a rotation angle detection sensor, which is a device for detecting how much the right lens barrel 2 is rotated with respect to the left lens barrel 1, and is constituted by a known rotary encoder in this embodiment. .

  A motor 12 rotates the camera shake correction mechanism 8 in accordance with the rotation angle detected by the rotation angle detection sensor 11.

  As a result, as can be seen from a comparison between the state in FIG. 5 and the state in FIG. 6, even when the interpupillary distance is adjusted, the relative phase relationship between the camera shake correction mechanisms 7 and 8 and the angular velocity sensors 9a and 9b changes. do not do.

  Therefore, since it is not necessary to individually control the camera shake correction mechanism 7 and the camera shake correction mechanism 8, if the control is performed in consideration of only the change in the direction of gravity output from the acceleration sensor 10, the calculation load can be reduced. Thus, the electric circuit can be simplified.

  Hereinafter, a binocular according to a second embodiment of the present invention will be described with reference to FIGS. 7 and 8.

  In FIGS. 7 and 8, portions having the same functions as those in the first embodiment are given the same reference numerals, and description thereof will be omitted.

  A connecting portion 13 connects the arm 3 and the arm 5 by a hinge structure, and a gear (not shown) is partially provided on the outer periphery.

  Reference numeral 14 denotes a gear that meshes with the gear portion of the connecting portion 13.

  Reference numeral 15 denotes a gear that meshes with the gear 14.

  Reference numeral 16 denotes a step gear composed of a large gear 16 b coaxially and integrally formed with a small gear 16 a meshing with the gear 15. The large gear 16 b is a gear (not shown) partially provided on the outer periphery of the camera shake correction mechanism 8. And are engaged.

  The gear train composed of the connecting portion 13, the gear 14, the gear 15, the gear 16, and the camera shake correction mechanism 8 is configured such that the gear ratio becomes 1.

  As a result, a rotation similar to the relative rotation angle of the left lens barrel 1 and the right lens barrel 2 due to the interpupillary adjustment is given to the camera shake correction mechanism 8.

  Also, by adjusting the rotation direction by the action of the gears 14 and 15, as can be seen by comparing the state of FIG. 7 and the state of FIG. 8, even if the interpupillary distance adjustment is performed, the camera shake correction mechanism 7 and the camera shake correction mechanism 8 And the relative phase relationship between the angular velocity sensors 9a and 9b does not change.

  Therefore, since it is not necessary to individually control the camera shake correction mechanism 7 and the camera shake correction mechanism 8, if the control is performed in consideration of only the change in the direction of gravity output from the acceleration sensor 10, the calculation load can be reduced. Thus, the electric circuit can be simplified.

  As described above, the preferred embodiments of the present invention have been described, but the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the gist.

1 left lens barrel, 2 right lens barrel, 3 arms, 4 arms, 5 arms, 6 arms,
7 camera shake correction mechanism, 8 camera shake correction mechanism, 9 angular velocity sensor, 10 acceleration sensor,
11 rotation angle detection sensor, 12 motor, 13 connecting part, 14 gears, 15 gears,
16 gears

Claims (3)

It has a pair of left and right optical systems on which light from the object to be observed enters,
By rotating around an axis parallel to the optical axis of the optical system, binoculars that can change the relative position of the pair of left and right optical systems,
Shake detection means for detecting shake of the binoculars,
Two image shake correction means provided in both of the optical systems and correcting respective image shakes of the optical system in accordance with an output of the shake detection means;
Binoculars, wherein at least one of the image blur correction means rotates about the optical axis of the image blur correction means in accordance with a change in the relative position of the optical system. The binoculars further include position change amount detection means for detecting a change amount of the relative position of the optical system, and rotation driving means for rotating the image blur correction means around the optical axis of the image shake correction means. The binoculars according to claim 1, wherein the amount of rotation by the rotation driving unit is determined according to the output of the position change amount detection unit. Coupling means for rotating at least one of the image blur correction means around the optical axis of the image blur correction means in conjunction with rotation about an axis parallel to the optical axis of the optical system; The binoculars according to claim 1, wherein: