JP2005221991A - Binoculars - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pair of binoculars capable of correcting a convergence value at the time of short-distance observation with a compact and simple mechanism and accurately correcting the convergence value. <P>SOLUTION: A pair of binoculars 1 is equipped with a pair of observation optical systems 2L and 2R, a focusing mechanism 5, and a convergence value correcting mechanism for correcting the convergence value by displacing objective optical systems 21L and 21R interlocked with the actuation of the focusing mechanism 5. Eyepiece optical systems 23L and 23R are respectively installed to turn centering around the optical axes O<SB>1L</SB>and O<SB>1R</SB>of the optical systems 21L and 21R in a focusing state when the distance of an observation object is infinity. By such turning, a distance between the optical axes O<SB>2L</SB>and O<SB>2R</SB>of the optical systems 23L and 23R can be adjusted. The maximum value of a distance between the optical axes O<SB>1L</SB>and O<SB>1R</SB>of the optical systems 21L and 21R when they are used is smaller than the minimum value of a distance between the optical axes O<SB>2L</SB>and O<SB>2R</SB>of the optical systems 23L and 23R. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to binoculars.

  When infinity is observed with general binoculars, the observation field of view seen by the left eye and the observation field of vision seen by the right eye almost completely overlap each other, and both eyes appear as one observation field. When a short distance of several meters or less is observed with the binoculars, there is only a part of the overlapping region of the observation field of view of the left eye and the right eye, which makes it difficult to see. This is because general binoculars are mainly based on observing objects at infinity to several tens of meters, and the left and right objective lens optical axes are fixed in parallel. When observing, the adjustment value for the object (distance to the in-focus object, diopter [dptr] = [1 / meter]) and the “convergence value” (distance where the left and right line of sight intersect, metric angle [MW] = [1 / meter ]) Would be too big. In the case of binoculars for observing the object at a high magnification, the effect of this discrepancy is significant. For example, in the case of 10 times binoculars, this discrepancy is 10 times that of the naked eye. ”Is a burden on the eyes and is very tired (“ convergence ”means that the visual axes of both eyes concentrate when looking at an object at a short distance, and the angle between the visual axes is“ Called convergence angle).

  In view of this problem, in order to reduce the burden on both eyes when observing a short distance with binoculars, the following Patent Documents 1 to 3 move both objective lenses in a direction perpendicular to the optical axis when observing a short distance. Binoculars having a mechanism for correcting a convergence value (angle of convergence) according to an adjustment value by bringing them closer to each other have been proposed.

  However, when the binoculars as described in Patent Documents 1 to 3 are actually designed, the distance that the objective lens must be moved in the direction orthogonal to the optical axis is excessive, and a mechanism for realizing the movement distance is incorporated. And the whole binoculars are enlarged. There is also a problem that the optical performance is greatly deteriorated due to the eccentricity of the optical axis. For this reason, the binoculars provided with the convergence value correction mechanism have not yet been put into practical use.

Japanese Patent No. 3090007 Japanese Patent No. 3196613 Japanese Patent No. 3189328

  An object of the present invention is to provide binoculars that can correct a convergence value with a small and simple mechanism in accordance with an adjustment value during short-distance observation, and that can correct the convergence value with high accuracy. .

Such an object is achieved by the present inventions (1) to (8) below.
(1) Binoculars provided with a pair of observation optical systems having an objective optical system, an erecting optical system, and an eyepiece optical system,
A focusing mechanism for performing focusing by moving a part of the observation optical system;
A convergence value correction mechanism that corrects a convergence value by displacing an objective displacement element that is all or part of the objective optical system in conjunction with the operation of the focusing mechanism;
The both eyepiece optical systems can adjust the distance between the optical axes according to the eye width of the user,
Binoculars characterized in that the maximum value of the distance between the optical axes of the two objective displacement elements in use is smaller than the minimum value of the distance between the optical axes of the both eyepiece optical systems.

  As a result, the amount of displacement of the objective displacement element necessary for correcting the convergence value can be reduced, so that it is possible to prevent the binoculars from becoming enlarged due to the installation of the convergence value correction mechanism. In addition, the structure of the convergence value correction mechanism can be simplified, and an increase in manufacturing cost can be avoided.

(2) The observation optical system has a predetermined step between an entrance-side optical axis and an exit-side optical axis of the eyepiece optical system with respect to the erecting optical system,
An integrated body that houses both objective displacement elements;
A left mirror body that is rotatably installed with respect to the main body about the incident-side optical axis on the left side, and that houses the eyepiece optical system and the erecting optical system on the left side;
A right mirror body that is installed so as to be rotatable with respect to the main body about the incident-side optical axis on the right side, and that houses the eyepiece optical system and the erecting optical system on the right side;
The binoculars according to (1), wherein the distance between the exit-side optical axes of the both eyepiece optical systems can be adjusted by rotating the left mirror body and the right mirror body with respect to the main body.

  Thereby, the convergence value can be corrected with high accuracy in accordance with the adjustment value, and the binoculars can be further reduced in size.

(3) The binoculars according to (1) or (2), wherein the convergence value correction mechanism corrects the convergence value by changing a distance between the optical axes of the two objective displacement elements.
Thereby, the congestion value correction mechanism can be configured with a simpler structure.

(4) Each objective displacement element is installed so as to be rotatable about a straight line parallel to its optical axis, and the distance between the optical axes of both objective displacement elements is changed by this rotation (3). Binoculars as described in.
As a result, the congestion value correction mechanism can be configured with a simpler structure.

(5) The focusing mechanism is configured to perform focusing by moving the objective displacement element,
The convergence value correction mechanism is a guide means having a portion for guiding each objective displacement element so as to rotate about each straight line as each objective displacement element is moved by the operation of the focusing mechanism. The binoculars according to (4), which is configured.

  As a result, the configuration of the congestion value correction mechanism can be extremely simplified, and the congestion value can be corrected with higher accuracy.

(6) The guide means is installed in parallel to the optical axis of the objective optical system, and follows a guide axis that is a rotation center of each objective displacement element and a direction inclined with respect to the optical axis of the objective optical system. A guide rail having at least a part of the inclined portion that extends and an engaging portion that is provided on a lens frame that holds each objective displacement element and engages with the guide rail,
In a state where the engaging portion is engaged with the inclined portion of the guide rail, each objective displacement element rotates about each guide shaft as the objective displacement element moves due to the operation of the focusing mechanism. The binoculars according to (5) above, which moves.

  As a result, the configuration of the congestion value correction mechanism can be extremely simplified, and the congestion value can be corrected with higher accuracy.

(7) It further comprises a lens frame for holding each objective displacement element,
Each of the lens frames has a shape in which a portion approaching each other is lost when the distance between the optical axes of the both objective displacement elements becomes small, and even closer than when this portion is not lost. The binoculars according to any one of (3) to (6), which are close to each other.

  Thereby, the convergence value correction can be performed to a closer distance while maintaining the aperture of the objective optical system.

  (8) Each of the objective displacement elements has a shape in which a portion approaching each other is lost when the distance between the optical axes is reduced, and is closer to each other than when the portions are not lost. The binoculars according to any one of (3) to (7), which are accessible.

  Thereby, the convergence value correction can be performed to a closer distance while maintaining the aperture of the objective optical system.

According to the present invention, since the amount of displacement of the objective displacement element necessary for correcting the convergence value is small, the convergence value can be corrected with high accuracy, and the binoculars are enlarged due to the installation of the convergence value correction mechanism. Can be prevented.
In addition, the structure of the convergence value correction mechanism can be simplified, and an increase in manufacturing cost can be avoided.

Hereinafter, the binoculars of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.
<First Embodiment>
1, FIG. 2, and FIG. 3 are states when the binoculars according to the first embodiment of the present invention are focused on an observation object at infinity (hereinafter, referred to as “infinity focused state”). FIG. 4, FIG. 5, and FIG. 6 are a cross-sectional plan view, a cross-sectional side view, a cross-sectional front view, and FIGS. 4, 5, and 6, respectively. FIG. 7 is a schematic view for explaining the amount of displacement of the objective optical system necessary for correcting the convergence value. FIG. FIG. In this specification, the upper side in FIG. 1 and the left side in FIG. 2 are “front”, the lower side in FIG. 1 and the right side in FIG. 2 are “rear”, and In the following description, the upper side is “upper” and the lower side is “lower”.

  As shown in FIG. 1, a binocular 1 includes an observation optical system 2L for the left eye, an observation optical system 2R for the right eye, a main body 3, a left mirror body 4L, and a right lens serving as a casing for housing these optical systems. It has a mirror body 4R and a focusing mechanism 5 for performing focusing in accordance with the distance of the observation object.

The observation optical systems 2L and 2R have objective optical systems 21L and 21R, erecting optical systems 22L and 22R, and eyepiece optical systems 23L and 23R, respectively. The erecting optical systems 22L and 22R in the observation optical systems 2L and 2R are composed of Porro prisms. Thus, the eyepiece optical system 23L, the 23R, erecting optical system 22L, an incident-side optical axis _O 21L for _{22R, O 21R} and the exit side optical axis _{O 22L,} predetermined step between the _{O 22R} (interval) Is formed. In the infinitely focused state, the optical axes O _1L and O _1R of the objective optical systems 21L and 21R coincide with the incident-side optical axes O _21L and O _21R .

  Both objective optical systems 21L and 21R are both installed in a single (one) main body 3. On the other hand, the left eyepiece optical system 23L and the erecting optical system 22L, and the right eyepiece optical system 23R and the erecting optical system 22R are separately installed in the left mirror body 4L and the right mirror body 4R. . The main body 3, the left mirror body 4L, and the right mirror body 4R may each be configured by one component, or may be configured by combining a plurality of components.

The left mirror body 4L and the right mirror body 4R are connected to the main body 3 so as to be rotatable within a predetermined angle range about the incident side optical axes O _21L and O _21R , respectively, and in any range, any state is provided. The state can be maintained by friction.

By rotating the left mirror body 4L and the right mirror body 4R counterclockwise with respect to the main body 3, the distances between the optical axes O _2L and O _{2R of the} eyepiece optical systems 23L and 23R (exit-side optical axes O _22L , O _22R distance), that is, the eye width can be adjusted. The binoculars 1 are preferably provided with an interlocking mechanism (not shown) that interlocks the left mirror body 4L and the right mirror body 4R in opposite directions.

  In the configuration shown in the figure, a cover glass 12 is installed in a window portion opened in front of the main body 3. Thereby, it is possible to prevent dust, dust and the like from entering the main body 3. This cover glass 12 may be omitted.

At the rear end portions of the mirror bodies 4L, 4R, eye contact members 13L, 13R are installed concentrically with the eyepiece optical systems 23L, 23R, respectively. The eye contact members 13L and 13R can be displaced in the directions of the optical axes O _2L and O _2R, and can be moved from the housed state shown in FIG. The user adjusts the position of the eye contact members 13L and 13R according to his / her own wearing glasses, the difference in the depth of the carving of the face, and the like. Look into the eyepiece optical systems 23L and 23R with the glasses on. Thus, the user can stably place his eyes on the eye point (a position where the entire field of view can be seen without turning over).

  The objective optical systems 21 </ b> L and 21 </ b> R are movable within the main body 3 and are moved by the operation of the focusing mechanism 5. As shown in FIGS. 2 and 3, the main body 3 is provided with guide shafts 11L and 11R and guide grooves (guide rails) 31L and 31R as guide means for guiding the movement of the objective optical systems 21L and 21R. ing.

The guide shafts 11L and 11R are each constituted by a straight bar, and are installed on the upper side of the objective optical systems 21L and 21R in a posture parallel to the optical axes O _1L and O _1R . As shown in FIG. 3, the projections 61L and 61R formed above the lens frames 6L and 6R that hold the objective optical systems 21L and 21R have holes through which the guide shafts 11L and 11R are inserted, respectively. Yes. Thereby, the objective optical systems 21L and 21R can move along the guide shafts 11L and 11R, respectively, and can rotate about the guide shafts 11L and 11R.

  The guide grooves 31L and 31R are formed in the lower inner wall of the main body 3. Projections (engaging portions) 62L and 62R to be inserted into the guide grooves 31L and 31R are formed below the lens frames 6L and 6R, respectively. When the objective optical systems 21L and 21R move along the guide shafts 11L and 11R, the protrusions 62L and 62R move along the guide grooves 31L and 31R.

  As shown in FIG. 1, the focusing mechanism 5 includes a wheel (focus ring) 51 as an operation unit, a wheel shaft 52 that rotates with the wheel 51, and a blade 53. The wheel 51 and the wheel shaft 52 are positioned between the observation optical systems 2L and 2R in plan view, and are rotatably supported by the main body 3. The blade 53 includes a base portion 531 having a female screw that is screwed into a male screw formed on the outer peripheral surface of the wheel shaft 52, and arms 532L and 532R that protrude from the base portion 531 to the left and right, respectively. The distal ends of the arms 532L and 532R are inserted into grooves formed in the protrusions 61L and 61R of the lens frames 6L and 6R.

  When the wheel 51 is rotated in a predetermined direction, the base 531 moves forward along the wheel shaft 52, and this force is transmitted to the lens frames 6L and 6R via the arms 532L and 532R, so that the objective optical systems 21L and 21R are moved forward. I'm going out. Further, when the wheel 51 is rotated in the direction opposite to the predetermined direction, the objective optical systems 21L and 21R are retracted backward. Focusing can be performed by the operation of the focusing mechanism 5 as described above.

  In the infinitely focused state shown in FIGS. 1 to 3, the objective optical systems 21L and 21R are in a retracted state.

  On the other hand, the closest distance focusing state shown in FIGS. 4 to 6 is a state in which the objective optical systems 21L and 21R protrude to the maximum in the forward direction, and the shortest focusing distance of the binoculars 1 can be obtained in this state. Although the shortest focusing distance is not particularly limited, as described below, the binoculars 1 of the present invention have a convergence value correction mechanism and are suitable for short-distance observation, and are relatively short, about 0.3 to 1 m. It is desirable.

The binoculars 1 have a convergence value correction mechanism that corrects the convergence value by changing the distance between the optical axes O _1L and O _{1R of} the objective optical systems 21L and 21R in conjunction with the operation of the focusing mechanism 5. In the present embodiment, the convergence value correcting mechanism includes the guide shafts 11L and 11R, the guide grooves 31L and 31R, and the protrusions 62L and 62R. Hereinafter, the correction of the convergence value in the binoculars 1 will be described.

As shown in FIG. 4, the guide grooves 31L and 31R are inclined portions 311L and 311R extending along a direction inclined with respect to the optical axes O _1L and O _1R of the objective optical systems 21L and 21R, and the inclined portions 311L and 311R. It has parallel parts 312L and 312R which are continuously formed rearward and extend in parallel to the optical axes O _1L and O _1R . The inclined portions 311L and 311R are inclined in such a direction as to approach each other toward the front. Indicators 32L and 32R indicating the positions of the objective optical systems 21L and 21R or the projections 62L and 62R in the infinitely focused state are attached to the sides of the intermediate portions of the parallel portions 312L and 312R.

When the protrusions 62L and 62R are on the parallel portions 312L and 312R, the distance between the optical axes O _1L and O _1R does not change even if the focusing mechanism 5 is activated and the objective optical systems 21L and 21R move. That is, the convergence value correction is not applied in the vicinity of the infinitely focused state. This is because the convergence value correction is not necessary when observing an object at a relatively long distance.

On the other hand, when the protrusions 62L and 62R are on the inclined portions 311L and 311R, the protrusions 62L and 62R move to the inclined portions 311L and 311R as the focusing mechanism 5 operates and the objective optical systems 21L and 21R move forward. As the objective optical systems 21L and 21R rotate around the guide shafts 11L and 11R, the distance between the optical axes O _1L and O _1R gradually decreases, and the convergence value correction is performed. Such (see FIGS. 3 and 6).

  By applying the convergence value correction in this way, even when observing a short distance, the observation image seen with the left eye and the observation image seen with the right eye are prevented from being misaligned, so that the observation is easy to see and comfortable. Can do.

  The focus distance (adjustment value) when the convergence value correction starts to be applied is not particularly limited, but is preferably about 3 to 5 m. The boundary points between the inclined portions 311L and 311R and the parallel portions 312L and 312R in the guide grooves 31L and 31R are at positions corresponding to the focusing distance when the convergence value correction starts to be applied.

As shown in FIG. 1, in the binoculars 1, the distance between the optical axes O _1L and O _1R of the objective optical systems 21L and 21R is such that the optical axes O _2L and O _{2R of the} eyepiece optical systems 23L and 23R are used. It is configured to be always smaller than the inter-distance (distance between the emission side optical axes O _22L and O _22R ). In other words, the maximum value of the distance between the optical axes O _1L and O _{1R of} the objective optical systems 21L and 21R (the state shown in FIG. 1) is a state in which the eye width is adjusted to the minimum (however, the state that can be used as binoculars). The distance between the optical axes O _2L and O _2R of the eyepiece optical systems 23L and 23R (the distance between the exit-side optical axes O _22L and O _22R ) is smaller.

  With this configuration, in the binoculars 1, the Dach prism binoculars in which the distance between the optical axes of both objective optical systems is equal to the distance between the optical axes of both eyepiece optical systems, or the distance between the optical axes of both objective optical systems is the optical axis of the both eyepiece optical systems. The amount of displacement of the objective optical systems 21L and 21R necessary for correcting the convergence value is smaller than that of binoculars that are larger than the distance (such as twin ice type or Bauschom type binoculars). The reason for this will be described with reference to FIG.

  In FIG. 7, only the right optical system is shown, but the same applies to the left side. In the figure, the position of the right objective optical system 100R when observing an object at infinity at infinity is indicated by a solid line. In order to observe the object 200 at a finite distance a (adjustment value, a <0) from the objective optical system 100R in a state where the convergence value is corrected, the objective optical system 100R is brought close to the center line of the binoculars, and a broken line It is necessary to move to the position indicated by. The moving distance y of the objective optical system 100R at this time is as follows: the focal length of the objective optical system 100R is f, the distance between the optical axes of both objective optical systems is 2D, the convergence angle is 2θ, and the objective optical system from the objective optical system to the object 200 Assuming that the distance to the image formation position by 100R is b (b> 0), as can be seen from FIG. 7 and the image formation formula 1 / b = 1 / a + 1 / f, y = b × tan θ = {f × a / (A + f)} × tan θ = {f × a / (a + f)} × D / (− a + b) = D × [f × a / (a + f) / {− a + f × a / (a + f)}]. That is, the moving distance y of the objective optical system 100R necessary for correcting the convergence value increases in proportion to D. Conversely, as the distance between the optical axes of both objective optical systems is shorter, the amount of displacement of the objective optical system necessary for correcting the convergence value can be reduced.

In the binoculars 1 of the present invention, since the distance between the optical axes O _1L and O _1R of the objective optical systems 21L and 21R is small as described above, the objective optical systems 21L and 21R are used for correcting the convergence value for the above reason. The distance moved in the direction perpendicular to the axes O _1L and O _1R is small. Therefore, the convergence value correction mechanism can be mounted without enlarging the main body 3, and the entire binoculars 1 can be made compact. In addition, the fact that the movement distances of the objective optical systems 21L and 21R necessary for the convergence value correction are small, which contributes to an improvement in the accuracy of the convergence value correction, and can correct the convergence value with high accuracy.

Further, since the movement distances of the objective optical systems 21L and 21R necessary for correcting the convergence value are small, the objective optical systems 21L and 21R are respectively rotated between the optical axes O _1L and O _{1R as in this} embodiment. It is possible to correct the convergence value by the objective rotation method that changes the distance. Since the objective rotation method has a simple structure, the manufacturing cost can be reduced.

Second Embodiment
FIG. 8 is a cross-sectional front view showing the closest distance focusing state in the binoculars according to the second embodiment of the present invention. Hereinafter, the second embodiment of the binoculars of the present invention will be described with reference to this figure, but the description will focus on differences from the above-described embodiment, and the description of the same matters will be omitted.

The lens frames 6L ′ and 6R ′ of the objective optical systems 21L ′ and 21R ′ in the binoculars 1 ′ shown in FIG. 8 have D-cut portions 63L and 63R, and between the optical axes O _1L and O _1R by the convergence value correction. When the distance becomes smaller, the parts approaching each other are missing. Thereby, the objective optical systems 21L ′ and 21R ′ can be approached closer than when it is assumed that the D-cut portions 63L and 63R are not provided. Therefore, the convergence value can be corrected to a closer distance while maintaining the apertures of the objective optical systems 21L ′ and 21R ′.

  In the configuration shown in the drawing, the objective optical systems 21L ′ and 21R ′ are also D-cut in accordance with the D-cut portions 63L and 63R of the lens frames 6L ′ and 6R ′, but only the lens frames 6L ′ and 6R ′ are D-cut. May be.

  The binoculars of the present invention have been described with respect to the illustrated embodiment. However, the present invention is not limited to this, and each part constituting the binoculars is replaced with one having an arbitrary configuration that can exhibit the same function. can do.

  For example, in the illustrated embodiment, the guide rail is configured by a groove (guide groove). However, the guide rail may be configured by a convex line, and a groove in which the convex line is inserted into the lens frame may be provided as an engaging portion. In addition, if the projection provided on the lens frame is configured to be pressed against the side surface of the guide rail by a spring, the guide rail can be configured with a step.

  In the illustrated embodiment, the configuration in which the distance between the optical axes is changed by rotating both the objective optical systems has been described. However, by moving both the objective optical systems in a direction orthogonal to the optical axis, You may comprise so that the center distance may be changed.

  In the illustrated embodiment, the objective optical system is composed of one lens group (two elements per group), and the lens group that moves by the focusing operation and the lens group for convergence adjustment are completely combined. When the optical system is composed of a larger number of lens groups, the focusing group and the convergence correction group may be assigned different lens groups, or a part of them may be used together, or the focusing operation It is theoretically possible to carry out with an optical member included other than the objective optical system.

  The binoculars of the present invention are not limited to the configuration in which the convergence value is corrected by changing the distance between the optical axes of both objective optical systems, but by tilting the optical axis of each objective optical system (each objective optical element). It may be configured to correct the congestion value.

It is a cross-sectional top view which shows the infinity focusing state in the binoculars of 1st Embodiment of this invention. It is a cross-sectional side view which shows the infinity in-focus state in the binoculars of 1st Embodiment of this invention. It is a cross-sectional front view which shows the infinity in-focus state in the binoculars of 1st Embodiment of this invention. It is a cross-sectional top view which shows the nearest distance focusing state in the binoculars of 1st Embodiment of this invention. It is a cross-sectional side view which shows the nearest distance focusing state in the binoculars of 1st Embodiment of this invention. It is a cross-sectional front view which shows the nearest distance focusing state in the binoculars of 1st Embodiment of this invention. It is a schematic diagram for demonstrating the displacement amount of the objective optical system required for convergence value correction | amendment. It is a cross-sectional front view which shows the nearest distance focusing state in the binoculars of 2nd Embodiment of this invention.

Explanation of symbols

1, 1 ′ Binoculars 11L, 11R Guide shaft 12 Cover glass 13L, 13R Eyepiece member 2L, 2R Observation optical system 21L, 21R, 21L ′, 21R ′ Objective optical system 22L, 22R Erecting optical system 23L, 23R Eyepiece optical system 3 Main body 31L, 31R Guide groove 311L, 312R Inclined part 312L, 312R Parallel part 32L, 32R Index 4L Left mirror 4R Right mirror 5 Focusing mechanism 51 Rolling wheel 52 Rolling shaft 53 Blade 531 Base part 532L, 532R Arm 6L, 6R, 6L ', 6R' Lens frame 61L, 61R Protruding part 62L, 62R Protruding 63L, 63R D cut part 100R Objective optical system 200 Object O _1L , O _1R , O _2L , O _2R Optical axis O _21L , O _21R incident side optical axis O _22L , O _22R exit side optical axis

Claims (8)

Binoculars provided with a pair of observation optical systems having an objective optical system, an erecting optical system and an eyepiece optical system,
A focusing mechanism for performing focusing by moving a part of the observation optical system;
A convergence value correction mechanism that corrects a convergence value by displacing an objective displacement element that is all or part of the objective optical system in conjunction with the operation of the focusing mechanism;
The both eyepiece optical systems can adjust the distance between the optical axes according to the eye width of the user,
Binoculars characterized in that the maximum value of the distance between the optical axes of the two objective displacement elements in use is smaller than the minimum value of the distance between the optical axes of the both eyepiece optical systems. The observation optical system has a predetermined step between an incident-side optical axis and an emission-side optical axis of the eyepiece optical system with respect to the erecting optical system,
An integrated body that houses both objective displacement elements;
A left mirror body that is rotatably installed with respect to the main body about the incident-side optical axis on the left side, and that houses the eyepiece optical system and the erecting optical system on the left side;
A right mirror body that is installed so as to be rotatable with respect to the main body about the incident-side optical axis on the right side, and that houses the eyepiece optical system and the erecting optical system on the right side;
The binoculars according to claim 1, wherein the distance between the exit-side optical axes of the both eyepiece optical systems can be adjusted by rotating the left mirror body and the right mirror body with respect to the main body.   The binoculars according to claim 1 or 2, wherein the convergence value correction mechanism corrects the convergence value by changing a distance between the optical axes of the two objective displacement elements.   4. The binoculars according to claim 3, wherein each of the objective displacement elements is installed so as to be rotatable about a straight line parallel to the optical axis thereof, and the distance between the optical axes of both objective displacement elements is changed by the rotation. . The focusing mechanism is configured to perform focusing by moving the objective displacement element;
The convergence value correction mechanism is a guide means having a portion for guiding each objective displacement element so as to rotate about each straight line as each objective displacement element is moved by the operation of the focusing mechanism. The binoculars according to claim 4, which is configured. The guide means is installed in parallel with the optical axis of the objective optical system, and is a guide axis that is a rotation center of each objective displacement element, and an inclination that extends along a direction inclined with respect to the optical axis of the objective optical system. A guide rail having at least a portion thereof, and an engaging portion that is provided on a lens frame that holds each objective displacement element and engages with the guide rail,
In a state where the engaging portion is engaged with the inclined portion of the guide rail, each objective displacement element rotates about each guide shaft as the objective displacement element moves due to the operation of the focusing mechanism. The binoculars according to claim 5, which moves. A lens frame for holding each objective displacement element;
Each of the lens frames has a shape in which a portion approaching each other is lost when the distance between the optical axes of the objective displacement elements is reduced, and is closer to the case where the portions are not lost. The binoculars according to any one of claims 3 to 6, which are accessible to each other. Each of the objective displacement elements has a shape in which a portion approaching each other is lost when the distance between the optical axes is reduced, and can be closer to each other than when the portion is not lost. The binoculars according to any one of claims 3 to 7.

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