JP2010097001A - Binoculars - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide binoculars that can easily and accurately adjust an optical axis of an objective optical system with simple constitution. <P>SOLUTION: The binoculars have left and right objective optical systems L1L and L1R, left and right erect optical systems L3L and L3R erecting optical images formed by the left and right objective optical systems respectively, and left and right eyepiece optical systems allowing an observer to observe the erected optical images with both eyes. The left and right objective optical systems include left and right optical elements L1L and L1R held to be integral at least at a portion thereof. Then, the binoculars have adjusting mechanisms 17 and 18 turning the left and right optical elements around an axis parallel with the optical axes of the left and right objective optical systems. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to binoculars, and more particularly to binoculars having an adjustment mechanism for an objective optical system.

  The binoculars include left and right objective optical systems and a plurality of prisms and mirrors, and left and right erect optical systems that erect the optical images formed by the left and right objective optical systems, respectively, Left and right eyepiece optical systems that allow an observer to observe an optical image with both eyes are provided. Various configurations for adjusting the optical axis of each optical system have been proposed (see Patent Documents 1 and 2).

In the binoculars disclosed in Patent Document 1, the optical axis of the eyepiece unit is adjusted by tilting the left and right eyepiece units each integrally holding an erecting optical system and an eyepiece optical system. In the binoculars disclosed in Patent Document 2, the optical axis of the objective optical system is adjusted by moving at least one of the left and right objective optical systems in a direction orthogonal to the optical axis.
JP 2003-057563 A Japanese Patent Laid-Open No. 08-211303

  However, there is a demand for a configuration that is simpler and that can perform the adjustment operation easily and accurately than the configuration for optical axis adjustment disclosed in Patent Documents 1 and 2.

  The present invention provides binoculars that can easily and accurately adjust the optical axis of an objective optical system with a simple configuration.

  Binoculars according to one aspect of the present invention include a left and right objective optical system, a left and right erecting optical system that erects an optical image formed by each of the left and right objective optical systems, and the erecting optical image. Left and right eyepiece optical systems. The left and right objective optical systems include left and right optical elements held together as at least a part thereof. And it has an adjustment mechanism for rotating the left and right optical elements around an axis parallel to the optical axis of the left and right objective optical systems.

  According to the present invention, by providing an adjustment mechanism for holding at least some of the left and right optical elements of the left and right objective optical systems so as to be integrated and rotating about an axis parallel to the optical axis, The optical axis of the objective optical system can be adjusted easily and accurately with a simple configuration.

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

  1, 2 and 3 show the configuration of binoculars which is Embodiment 1 of the present invention. FIG. 1 shows a cross section of the pair of left and right objective optical systems and the pair of left and right eyepiece optical systems on the plane including the optical axis. FIG. 2 is a perspective view of binoculars, and FIG. 3 is an exploded perspective view.

  1 and 2, OL is the optical axis of the left objective optical system, and OR is the optical axis of the right objective optical system. EL is the optical axis of the left eyepiece optical system, and ER is the optical axis of the right eyepiece optical system.

  1 to 3, L1L and L1R are left and right objective lenses that constitute a part of each of the left and right objective optical systems. L2L and L2R are left and right shake correction lenses (shake correction optical systems) constituting other parts of the left and right objective optical systems, respectively. The shake correction lenses L2L and L2R are optical images formed by the left and right objective optical systems by shifting up, down, left and right (directions orthogonal to the optical axes OL and OR of the objective optical system) with respect to the objective lenses L1L and L1R. Move up / down / left / right. Thereby, image blur due to camera shake applied to the binoculars is reduced.

  L3L and L3R are left and right Polo II type erecting prisms constituting left and right erecting optical systems. L4L and L4R are left and right eyepiece lenses that constitute the left and right eyepiece optical systems.

  The left and right Polo II type erecting prisms L3L and L3R erect the optical image formed by the left and right objective optical systems, and the optical axes OL and OR of the left and right objective optical systems are light of the left and right eyepiece optical systems. Eccentric with respect to the axes EL and ER. The left and right eyepiece optical systems allow an observer to observe an upright optical image with both eyes. The erecting optical system may be configured using a prism (a roof prism or a parallelogram prism) or a mirror other than the Polo II type erecting prism.

  Reference numerals 1L and 1R denote objective barrels that hold the objective lenses L1L and L1R, respectively. Reference numeral 2A denotes a shake correction unit including left and right shake correction lenses L2L and L2R, which is incorporated in the objective barrel 2.

  The objective lens holding frames 1L and 1R are bayonet-coupled to the left and right front ends of the objective barrel 2, and are fixed so as not to rotate with respect to the objective barrel 2 by a non-illustrated anti-rotation structure. That is, the left and right objective lenses (optical elements) L1L and L1R are held by the objective barrel 2 so as to be integrated (that is, right and left integrated).

  The optical axes of the left and right shake correction lenses L2L and L2R respectively coincide with the optical axes of the left and right objective lenses L1L and L1R at the center position within the movable range of the shake correction lenses L2L and L2R. The left and right shake correction lenses L <b> 2 </ b> L and L <b> 2 </ b> R are held by the shift frame 21 so as to be integrated (that is, integrated to the left and right), in other words, so as to be integrally shifted with respect to the objective barrel 2. In this way, in this embodiment, the entire left and right objective optical systems are integrated so that the shake correction lenses L2L and L2R can move inside. The detailed configuration of the shake correction unit 2A will be described later.

  Reference numerals 4L and 4R denote left and right eyepiece tubes that hold the left and right eyepiece lenses L4L and L4R, respectively. 3L and 3R are left and right support frames for holding the left and right Polo II type erecting prisms L3L and L3R and the left and right eyepiece tubes 4L and 4R, respectively.

  Reference numerals 5L and 5R are observation rubbers attached to the eyepiece tubes 4L and 4R, respectively. Male helicoids are formed on the outer peripheries of the eyepiece tubes 4L and 4R, respectively. Further, female helicoids are formed on the inner peripheral walls of the support frames 3L and 3R. Therefore, the eyepieces L4L and L4R can be moved in the optical axis direction by rotating the left and right eyepiece tubes 4L and 4R around the optical axes EL and ER of the left and right eyepiece optical systems, respectively. Thereby, diopter adjustment of right and left is possible.

  The left and right eyepiece units 6L and 6R are configured by the eyepiece lenses L4L and L4R, the Polo II type erecting prisms L3L and L3R, the eyepiece tubes 4L and 4R, and the left and right support frames 3L and 3R.

  A support base member 7 supports the eyepiece units 6L and 6R so as to be rotatable around the optical axes OL and OR of the left and right objective optical systems, and moves the entire left and right objective optical systems in the optical axis direction. This is a base for focusing on the observation object.

  The support base member 7 is provided with a vertical portion 7a bent so as to be orthogonal to the optical axes OL and OR of the objective optical system. Left and right openings 7L and 7R are formed in the vertical part 7a, and cylindrical parts 3La and 3Ra provided in the support frames 3L and 3R are engaged with the openings 7L and 7R, respectively.

  Reference numerals 8L and 8R denote left and right interlocking plates, which transmit the rotation around the optical axis (OL or OR) of the objective optical system of one of the left and right eyepiece units 6L and 6R to the other eyepiece unit. . The interlocking plates 8L and 8R are provided with gear portions 8La and 8Ra, respectively, which mesh with each other. A plurality of arm portions 8Lb and 8Rb are formed on the interlocking plates 8L and 8R, respectively. The interlocking plates 8L and 8R are attached to the support frames 3L and 3R with screws by sandwiching the vertical portion 7a of the support base member 7 between the support frames 3L and 3R. As a result, the left and right eyepiece units 6L and 6R are held so as to be capable of interlocking rotation around the optical axes OL and OR of the left and right objective optical systems with respect to the support base member 7 (vertical portion 7a). The plurality of arm portions 8Lb and 8Rb are elastically deformed between the interlocking plates 8L and 8R and the support base member 7 (vertical portion 7a), and give resistance to rotation of the interlocking plates 8L and 8R with respect to the vertical portion 7a. .

  Since the optical axes EL and ER of the left and right eyepiece optical systems are decentered with respect to the optical axes OL and OR of the left and right objective optical systems, respectively, the left and right eyepiece units 6L and 6R are made light of the left and right objective optical systems. When rotating around the axes OL and OR, the width between the optical axes EL and ER of the left and right eyepiece optical systems changes. This enables so-called eye width adjustment in which the distance between the optical axes EL and ER of the left and right eyepiece optical systems is matched to the distance between the left and right eyes of the observer.

  In addition, the positions of the left and right polo II type erecting prisms L3L and L3R are adjusted so that the optical images observed through the left and right eyepieces L4L and L4R are not shifted during eye width adjustment in each of the eyepiece units 6L and 6R Is done. This adjustment is for making the rotation axes of the left and right eyepiece units 6L and 6R coincide with the optical axes of the eyepiece lenses L4L and L4R.

  Reference numeral 7b denotes an upper surface portion extending in parallel to the optical axes OL and OR of the left and right objective optical systems in the support base member 7, and serves as a base surface for focusing by moving the left and right objective optical systems in the optical axis direction. Part. Convex portions 7c are formed at four locations on the upper surface portion 7b by embossing.

  Reference numeral 9 denotes a focus support member to which the objective barrel 2 is attached. Guide groove portions 9a, 9b, 9c, and 9d provided to extend in the optical axis direction are formed at four locations on the focus support member 9, respectively. Compared to the guide groove portions 9a and 9b, the guide groove portions 9c and 9d are formed wider.

  Reference numeral 10 denotes four guide members, each having a guide portion 10a engaged with the guide groove portions 9a and 9b so as to be movable in the optical axis direction, and an arm portion 10b extending left and right. Each guide member 10 is fixed to the upper surface portion 7b of the support base member 7 with screws in a state where the guide portion 10a is engaged with the guide groove portions 9a to 9d.

  The focus support member 9 is guided in the optical axis direction by the guide portion 10a of the guide member 10 engaged with the guide groove portions 9a and 9b. The focus support member 9 is pressed into contact with the convex portion 7 c of the base member 7 by pressing portions of the guide groove portions 9 a to 9 d on both sides in the width direction by the arm portion 10 b of the guide member 10.

  Reference numeral 11 denotes a feed screw that rotates at a fixed position. An operation dial 12 is coupled to the rear end of the feed screw 11. A bearing 13 supports the feed screw 11 and the operation dial 12 so as to be rotatable at a fixed position. The bearing 13 is fixed by screws to a dial holding portion 7d bent at a right angle at the rear end of the upper surface portion 7b of the base member 7. Reference numeral 14 denotes a female screw member, which is fixed to a screw holding portion 9e bent at a right angle at the rear end of the focus support member 9 with screws. The feed screw 11 is screwed into the female screw member 14. According to such a configuration, the focus support member 9 can be moved in the optical axis direction by rotating the operation dial 12.

  A stopper 15 is fixed to the front end of the feed screw 11 after the female screw member 14 is screwed into the feed screw 11. The movement of the focus support member 9 in the optical axis direction is limited between the stopper 15 and the dial holding portion 7d.

  The objective barrel 2 includes coupling portions 2 a and 2 b to which the focus support member 9 is coupled by screws, and positioning pins 2 c that determine the position in the left-right direction with respect to the focus support member 9. Further, the objective tube 2 is provided with positioning pins 2d and 2e for determining the position of the focus support member 9 in the optical axis direction.

  The coupling portions 2a and 2b and the positioning pin 2c pass through an opening 7e formed in the upper surface portion 7b of the base member 7 so as to extend in the optical axis direction, and are fixed to the focus support member 9 by two screws 16. . The positioning pins 2d and 2e engage with long groove portions 9e and 9f formed on the focus support member 9 so as to extend in the left-right direction.

  In this way, the objective optical system integrated on the left and right is fixed to the focus support member 9 in the optical axis direction. Thereby, focusing with respect to an observation target can be performed by the movement of the focus support member 9 in the optical axis direction.

  Next, the optical axis adjustment mechanism will be described with reference to FIG. FIG. 4 shows a cross section along plane A shown in FIG. The plane A is a plane that is orthogonal to the optical axes OL and OR of the left and right objective optical systems and passes through the positioning pins 2d and 2e of the objective barrel 2.

  Reference numeral 17 denotes an optical axis adjusting member fixed to the left and right of the objective barrel 2 with screws. The optical axis adjusting member 17 is provided with a female screw portion 17a.

  Reference numeral 18 denotes left and right optical axis adjustment screws that pass through the left and right holes formed in the focus support member 9 and are screwed into the female screw portions 17 a of the left and right optical axis adjustment members 17.

  FIG. 4 shows a state of optical axis adjustment from a state where the left objective optical system (optical axis OL) is positioned below the right objective optical system (optical axis OR). In this case, the left optical axis adjustment screw 18 is screwed into the female screw portion 17 a of the left optical axis adjustment member 17 fixed to the objective barrel 2. As a result, the objective lens barrel 2 has a left objective optical system (optical axis OL) obliquely upward and a right objective with a portion fixed to the focus support member 9 by two screws 16 as a fulcrum. The optical system (optical axis OR) rotates so as to move obliquely downward. In other words, the objective barrel 2 rotates around an axis extending in parallel with the optical axes OL and OR of the objective optical system through a portion fixed to the focus support member 9 by the two screws 16. .

  Thereby, the vertical position of the optical axis OL of the left objective optical system and the optical axis OR of the right objective optical system can be matched. That is, the vertical position of the left and right optical images observed through the eyepieces L4L and L4R can be matched. It should be noted that the optical axis OL of the left objective optical system and the optical axis OR of the right objective optical system move by the same amount in the left-right direction.

  When the right objective optical system (optical axis OR) is positioned below the left objective optical system (optical axis OL), the right optical axis adjustment screw 18 is connected to the female thread portion of the right optical axis adjustment member 17. What is necessary is just to screw in 17a.

  As described above, the left and right optical axis adjusting screws 18 are simply screwed into the optical axis adjusting member 17 fixed to the objective lens barrel 2, and the screw 18 is simply rotated. The vertical position of the optical axes OL and OR of the objective optical system can be adjusted with high accuracy.

  If the left and right optical axis adjustment screws 18 are fixed with an adhesive after such optical axis adjustment, the optical axes OL, OR of the objective optical system are caused by loosening of the optical axis adjustment screws 18 due to vibration or impact. Can be prevented from shifting.

  In FIG. 1, reference numeral 19 denotes an exterior member that surrounds the left and right objective optical systems, the optical axis adjusting mechanism, the focusing mechanism, and the like described above. The exterior member 19 is not shown in FIGS. 2, 3, and 4. The movable part and the optical axis adjustment mechanism accompanying the focusing are protected by the exterior member 19.

  Here, the allowable value of the deviation amount of the optical axes OL and OR of the left and right objective optical systems after the optical axis adjustment will be described. The parallelism of the left and right optical axes OL and OR is defined in Japanese Industrial Standard [JIS B 7121]. For example, the allowable values for AA class binoculars having a magnification of 10 times are 2.5 minutes in the vertical direction, 3.5 minutes in the right and left outer direction, and 7.5 minutes in the inner direction in the angle of real view. ing. The inward direction is a so-called cross direction. When people look at things at close distances, they naturally become cross-eyed, so it is possible to adjust the field of view in the direction of cross-over without any difficulty. However, since the eye movements in the outward direction and the up-down direction cannot be performed naturally, if the deviation between the optical axes OL and OR of the left and right objective optical systems is large, the eyes become tired and it is difficult to overlap the left and right optical images. It becomes. The allowable value described above becomes smaller as the magnification of the binoculars increases.

  In this embodiment, the left and right objective optical systems are integrally held by highly accurate parts. The objective lenses L1L and L1R are held by the objective lens holding frames 1L and 1R, and are fixed to the front end of the objective barrel 2 by bayonet coupling. The left and right shake correction lenses L2L and L2R are also integrally held by a single holding frame described later. The deviation of the left and right objective optical systems from the left and right eyepiece optical systems is determined by the positional accuracy of the openings 7L and 7R formed in the support base member 7. For this reason, the optical axis parallelism in the left-right direction of the left and right objective optical systems can be within the allowable range without performing adjustment work by improving the manufacturing accuracy of these components. Therefore, in this embodiment, only a mechanism for adjusting the optical axis in the vertical direction of the left and right objective optical systems is provided.

  Next, the configuration of the shake correction unit 2A will be described in detail with reference to FIG. Reference numeral 2 denotes the above-described objective lens barrel, and reference numeral 21 denotes a shift frame that holds the left and right shake correction lenses L2L and L2R so as to be integrated. The shift frame 21 shifts up, down, left and right without rotating with respect to the objective lens barrel 2, so that the shake correction lenses L2L, L2R are decentered with respect to the objective lenses L1L, L1R, and are formed by the objective optical system. The image moves up, down, left and right.

  A guide member 22 is supported so as to be movable only in the left-right direction with respect to the objective barrel 2. Reference numerals 23 and 24 denote guide bars for guiding the movement of the guide member 22 in the left-right direction. Both ends of the guide bar 23 are held by being press-fitted or bonded into grooves 20a and 20b formed in the objective barrel 2. Further, both ends of the guide bar 24 are held by being press-fitted or bonded into grooves 20c and 20d formed in the objective barrel 2.

  Reference numeral 25 denotes a drive coil, which is bonded and fixed to the guide member 22. Reference numeral 26 denotes a drive magnet, which has an N pole and an S pole in the left-right direction. A yoke 27 shown in FIG. 1 is disposed on the back side of the drive magnet 26, and the yoke 27 closes the magnetic circuit on the back side of the drive magnet 26. The yoke 27 and the drive magnet 26 are adhered and fixed to the objective barrel 2 and are attracted to each other.

  A yoke 28 is provided on the objective barrel 2 and is fixed to a boss portion 20e penetrating the guide member 22 with screws. The drive coil 25 is disposed between the yoke 28 and the drive magnet 26, and the yoke 28 closes the magnetic circuit on the side opposite to the yoke 27.

  When the drive coil 25 is energized, Lorentz force is generated and the guide member 22 moves in the left-right direction. A hall element 29 as a magnetic sensor is attached to the center of the drive coil 25 in the guide member 22. The hall element 29 moves in the left-right direction with respect to the drive magnet 26 together with the guide member 22 to output an electric signal corresponding to the change in magnetic flux density. Using the electrical signal from the hall element 29, the position of the guide member 22 in the left-right direction can be detected.

Reference numerals 30 and 31 denote guide bars, which support the shift frame 21 so as to be movable in the vertical direction with respect to the guide member 22. Both ends of the guide bar 30 are held by being press-fitted or bonded into groove portions 22 a and 22 b formed in the guide member 22. Further, both ends of the guide bar 31 are press-fitted or adhered to the grooves 22c and 22d formed in the guide member 22, and 32 is a drive coil, which is adhered and fixed to the shift frame 21. Reference numeral 33 denotes a drive magnet, which is bonded and fixed to the support member 35 so that the N pole and the S pole are arranged in the vertical direction. A yoke 34 is disposed on the back side of the drive magnet 33 and closes the magnetic circuit. The yoke 34 is bonded and fixed to the support member 35. The yoke 34 is attracted to the drive magnet 33. The drive coil 32 is disposed between the yoke 28 and the drive magnet 33 described above. As described above, the yoke 28 closes the magnetic circuit on the drive magnet 26 side and also closes the magnetic circuit on the drive magnet 33 side.

  The support member 35 is positioned with respect to the objective barrel 2 and fixed with screws. When the drive coil 32 is energized, Lorentz force is generated and the shift frame 21 moves in the vertical direction. Although not shown, a hall element, which is a magnetic sensor, is attached to the center of the drive coil 32 in the shift frame 21. The Hall element moves in the vertical direction with respect to the drive magnet 33 together with the shift frame 21 to output an electrical signal corresponding to a change in magnetic flux density. The position of the shift frame 21 in the vertical direction can be detected using an electrical signal from the Hall element.

  Although not shown, an electric circuit board for controlling the shake correction unit 2A is fixed to the objective barrel 2. The substrate includes a vibration sensor such as a vibrating gyroscope that detects the pitch of the binoculars and the angular velocity in the yaw direction, and a control circuit that controls energization of the drive coils 25 and 32 based on the electrical signals from the Hall elements. Has been implemented. Further, the substrate is provided with a power supply unit and a switch for switching on / off of the shake correction operation.

  6 and 7 show a configuration of binoculars that is Embodiment 2 of the present invention. 6 is a perspective view of binoculars, and FIG. 7 is an exploded perspective view.

  In FIG. 6, OL is the optical axis of the left objective optical system, and OR is the optical axis of the right objective optical system. EL is the optical axis of the left eyepiece optical system, and ER is the optical axis of the right eyepiece optical system. The configurations of the left and right objective optical systems, the left and right erecting optical systems, and the left and right eyepiece optical systems are the same as those in the first embodiment.

  106L and 106R are left and right eyepiece units. Reference numeral 107 denotes a support base member that supports the left and right eyepiece units 106L and 106R and the left and right objective optical systems.

  The left and right eyepiece units 106 </ b> L and 106 </ b> R are attached to a vertical part 107 a that is bent at a rear end of the support base member 107 so as to be orthogonal to the optical axes OL and OR of the objective optical system. The structure for attaching the eyepiece units 106L and 106R to the vertical portion 107a and the eye width adjustment mechanism are the same as those in the first embodiment. However, in this embodiment, a configuration is adopted in which the eyepiece optical system is moved in the optical axis direction to focus on the observation object.

  Reference numerals 101L and 101R denote objective lens frames that hold the objective lenses L1L and L1R, respectively. Reference numeral 102 denotes an objective barrel in which the objective lens frames 101L and 101R are coupled as in the first embodiment. A shake correction unit configured in the same manner as in the first embodiment is incorporated in the objective barrel 102. Also in this embodiment, the left and right objective lenses (optical elements) L1L and L1R are held together by the objective barrel 2. Also in this embodiment, the entire left and right objective optical systems are integrated so that the shake correction lens can be moved inside.

  Reference numeral 107b denotes an upper surface portion of the support base member 107, and the objective barrel 102 is fixed to the upper surface portion 107b. Reference numeral 103 denotes four support pins fixed to the upper portion of the objective barrel 102 by press-fitting or bonding. A spherical portion 103b is formed at the base portion of the support pin 103, and a cylindrical portion 103a is formed at the upper end of the spherical portion 103b.

  Reference numeral 104 denotes two leaf springs, which are positioned and fixed to the spring mounting portions 102a and 102b provided on the upper portion of the objective barrel 102 by screws that pass through holes 107g and 107h formed in the support base member 107. The The two leaf springs 104 are pulled up by the spring force so as to press the objective barrel 102 against the upper surface portion 107 b of the support base member 107. As a result, the spherical surface portions 103b of the four support pins 103 are positioned on the lower surface side of the positioning hole portions 107c and 107d formed in the upper surface portion 107b of the support base member 107 and the positioning elongated hole portions 107e and 107f extending in the optical axis direction. Abuts the part. Thereby, the objective barrel 102 is integrally held by the support base member 107.

  Next, the optical axis adjustment mechanism in the present embodiment will be described. FIG. 8 shows a cross section along the plane B shown in FIG. The surface B is a surface that is orthogonal to the optical axes OL and OR of the objective optical system and passes through the two spring mounting portions 102 a and 102 b of the objective lens barrel 102.

  Reference numeral 117 denotes an optical axis adjusting member fixed to the left and right of the objective barrel 102 with screws. Reference numeral 118 denotes an optical axis adjusting screw. As shown in FIG. 7, female screw portions 107 i and 107 j for screwing the optical axis adjusting screw 118 are provided on the upper surface portion 107 b of the support base member 107.

  FIG. 8 shows a state of optical axis adjustment from a state in which the left objective optical system (optical axis OL) is positioned above the right objective optical system (optical axis OR). In this case, when the optical axis adjustment screw 118 is screwed into the left female screw portion 107 i of the support base member 107, the lower end of the optical axis adjustment screw 118 comes into contact with the left optical axis adjustment member 117, and the objective barrel 102. Push down the left side of. At this time, the objective barrel 102 rotates around an axis connecting the positioning hole 107d on the right side of the support base member 107 and the positioning slot 107f, that is, an axis parallel to the optical axes OL and OR of the objective optical system.

  As a result, the left objective optical system (optical axis OL) moves obliquely downward, the right objective optical system (optical axis OR) moves leftward, and the optical axis OL of the left objective optical system and the right The position of the objective optical system in the vertical direction of the optical axis OR can be matched. That is, the vertical positions of the left and right optical images observed through the eyepiece units 106L and 106R can be matched. It should be noted that the optical axis OL of the left objective optical system and the optical axis OR of the right objective optical system move by the same amount in the left-right direction.

  When the right objective optical system (optical axis OR) is positioned above the left objective optical system (optical axis OL), the optical axis adjusting screw 118 is screwed into the right female screw portion 107j of the support base member 107. That's fine. In this case, the objective barrel 102 rotates around an axis connecting the positioning hole 107c on the left side of the support base member 107 and the positioning slot 107e, that is, an axis parallel to the optical axes OL and OR of the objective optical system.

  In this way, the objective lens barrel 102 is urged by the leaf spring 104, and the optical axis adjusting screw 118 is simply screwed to the support base member 107, so that the screw 118 is simply rotated. Thus, the vertical position of the optical axes OL and OR of the objective optical system can be adjusted with high accuracy.

  Further, in this embodiment, the center portion 107k on the front side of the support base member 107 is made large by setting the axis serving as the rotation center for adjusting the optical axis of the objective optical system above the objective optical system. Can do. Thereby, the corresponding part of an exterior member (not shown) can be recessed, and the freedom degree of external appearance design can be increased.

  9 and 10 show the configuration of binoculars that is Embodiment 3 of the present invention. FIG. 9 is a perspective view of binoculars, and FIG. 10 is an exploded perspective view.

  In these figures, OL is the optical axis of the left objective optical system, and OR is the optical axis of the right objective optical system. EL is the optical axis of the left eyepiece optical system, and ER is the optical axis of the right eyepiece optical system.

  L201L and L201R are left and right first objective lenses that constitute a part of the left and right objective optical systems. L205L and L205R are left and right second objective lenses that constitute another part of the left and right objective optical systems. L202L and L202R are left and right shake correction lenses that constitute another part of the left and right objective optical systems.

  The shake correction lenses L202L and L202R shift the optical images formed by the left and right objective optical systems up and down and left and right by shifting up and down and left and right with respect to the first and second objective lenses L201L, L201R, L205L and L205R. .

  L206L and L206R are left and right eyepiece units, which are configured in the same manner as in the first embodiment. L204L and L204R are left and right eyepiece lenses that are arranged in the left and right eyepiece units L206L and L206R to form the left and right eyepiece optical systems.

  Reference numeral 201 denotes an objective barrel that holds the left and right first objective lenses (optical elements) L201L and L201R so as to be integrated. In this embodiment, the left and right first objective lenses L201L and L201R constituting a part of the left and right objective optical systems are held together by the objective barrel 201, and the objective barrel 201 is rotated. The optical axis is adjusted in the vertical direction of the left and right objective optical systems.

  Reference numeral 202 denotes a shake correction base member. Reference numeral 221 denotes a shift frame that holds the left and right shake correction lenses L202L and L202R so as to be integrated. The shake correction base member 202 serves as a base for shifting the shift frame 221 vertically and horizontally with respect to the first and second objective lenses L201L, L201R, L205L, and L205R.

  The shake correction base member 202 holds the right second objective lens L205R. The shake correction base member 202 holds the left second objective lens L205L via the lens frame 205. Reference numeral 208 denotes a ring-shaped leaf spring. The leaf spring 208 is fixed to the shake correction base member 202 by three screws, presses the lens frame 205 against the abutting surface of the shake correction base member 202, and the left second objective lens L205L is moved to the right second objective lens. It is held at the same position in the optical axis direction as L205R. As described above, a shake correction unit 202A in which the left and right second objective lenses L205L and L205R are added to the shake correction unit configured in the same manner as in the first embodiment is configured.

  A support base member 207 supports the left and right eyepiece units L206L and L206R and the left and right objective optical systems. The eyepiece units 206 </ b> L and 206 </ b> R are attached to vertical portions 207 a that are bent so as to be orthogonal to the optical axes OL and OR of the objective optical system at the rear end of the support base member 207. The structure for attaching the eyepiece units 206L and 206R to the vertical portion 207a and the eye width adjustment mechanism are the same as those in the first embodiment.

  Reference numeral 209 denotes a focus support member to which a shake correction base member 202 to which an objective barrel 201 is attached is positioned and fixed by three screws as will be described later. In the present embodiment, similarly to the first embodiment, a configuration is adopted in which the entire objective optical system is moved in the optical axis direction with the upper surface portion 207b of the support base member 207 as a base to focus on the observation target. Yes. The focusing mechanism is the same as in the first embodiment.

  Next, the optical axis adjustment mechanism in the present embodiment will be described with reference to FIGS. 11, 12, 13, and 14. FIG. 11 and 13 are front views of the binoculars, and FIG. 12 is a bottom view of the binoculars. FIG. 14 is a side view of the binoculars. In any figure, the exterior member is omitted. Further, in FIG. 13 and FIG. 14, illustration of the objective barrel 201 is also omitted.

  In FIG. 11, 201a is a rotation center hole provided between the optical axes OL and OR of the left and right objective optical systems in the objective lens barrel 201 also shown in FIGS. A rotation center pin 202a is provided on the shake correction base member 202 so as to correspond to the rotation center hole 201a. The objective lens barrel 201 is temporarily fixed to the front end face of the shake correction base member 202 with four screws by inserting a rotation center pin 202a into the rotation center hole 201a.

  In FIG. 12, 201 b is an adjustment hole provided in the lower part of the objective lens barrel 201 as shown in FIG. 10, and 202 b is an adjustment groove formed on the lower surface of the shake correction base member 202. Reference numeral 230 denotes an eccentric pin having a cylindrical portion 230a and a pin portion 230b eccentric to the cylindrical portion 230a.

  The cylindrical portion 230a of the eccentric pin 230 is fitted into the adjustment hole portion 201b, and the pin portion 230b is inserted into the adjustment groove portion 202b. When the eccentric pin 230 is rotated around the axis of the cylindrical portion 230a in the adjustment hole portion 201b, the pin portion 230b presses the end face in the left-right direction of the adjustment groove portion 202b. As a result, as shown in FIG. 11, the objective lens barrel 201 is rotated with respect to the shake correction base member 202 around the rotation center pin 202a, and the optical axes OL and OR of the left and right objective optical systems are turned upside down. Move to. The rotation center pin 202a is an axis parallel to the optical axes OL and OR of the objective optical system.

  After adjusting the optical axis of the objective optical system in this way, the objective lens barrel 201 is fixed to the shake correction base member by tightening or bonding the four screws temporarily fixed to the shake correction base member 202. Secure to member 202. With the above configuration, the optical axis can be adjusted in the vertical direction of the objective optical system.

  In FIG. 13, 205 c is a positioning hole provided in the lens frame 205, and 202 c is a positioning pin provided in the shake correction base member 202. In FIG. 12, 202 d is an adjustment hole provided on the lower surface of the shake correction base member 202, and 205 d is an adjustment groove provided on the lower surface of the lens frame 205.

  The cylindrical portion 230a of the eccentric pin 230 described above is fitted into the adjustment hole portion 202d, and the pin portion 230b is inserted into the adjustment groove portion 205d. When the eccentric pin 230 is rotated around the axis of the cylindrical portion 230a in the adjustment hole portion 202d, the pin portion 230b presses the end surface in the left-right direction of the adjustment groove portion 205d. As a result, as shown in FIG. 13, the lens frame 205 moves to the left and right with respect to the shake correction base member 202, and the optical axis OL of the left objective optical system moves to the left and right.

  After adjusting the optical axis of the left objective optical system in this way, an adhesive is poured from the openings 202e and 202f formed on the side surface of the shake correction base member 202 as shown in FIG. Fix to the base member 202.

  By forming the adjustment hole 201b and the adjustment groove 202b, and the adjustment hole 202d and the adjustment groove 205d in the same shape, the optical axis is adjusted in the vertical and horizontal directions of the objective optical system using one eccentric pin 230. Can be continuously performed from the same side (the lower surface side of the binoculars).

  However, as described above, in the eccentric pin 230 that performs optical axis adjustment in the vertical direction with a small allowable optical axis deviation, the eccentric amount of the pin portion 230b with respect to the cylindrical portion 203a is reduced, and the eccentric pin 230 Adjustment sensitivity with respect to the amount of rotation may be lowered to make adjustment easier.

  As described above, the objective lens tube 201 is rotatably coupled to the shake correction base member 202, and the simple configuration in which the adjustment hole portion and the adjustment groove portion are respectively formed, and the eccentric pin 230 is simply rotated. With this work, the optical axis of the objective optical system can be adjusted with high accuracy.

  This embodiment is particularly effective when the optical axis parallelism in the left-right direction cannot be within the allowable range only with the manufacturing accuracy of the parts constituting the binoculars.

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

  For example, in the first to third embodiments, the binoculars having the shake correction unit have been described. However, the present invention can be applied to binoculars having no shake correction unit.

1 is a cross-sectional view of binoculars that is Embodiment 1 of the present invention. 1 is a perspective view of binoculars according to Embodiment 1. FIG. FIG. 3 is an exploded perspective view of the binoculars according to the first embodiment. FIG. 4 is a diagram for explaining optical axis adjustment in the binoculars according to the first embodiment. FIG. 3 is an exploded perspective view of a shake correction unit provided in the binoculars according to the first embodiment. The perspective view of the binoculars which are Example 2 of this invention. FIG. 6 is an exploded perspective view of binoculars according to a second embodiment. FIG. 6 is a diagram for explaining optical axis adjustment in the binoculars according to the second embodiment. The perspective view of the binoculars which are Example 3 of this invention. FIG. 6 is an exploded perspective view of binoculars according to a third embodiment. FIG. 6 is a front view of binoculars according to a third embodiment. FIG. 9 is a bottom view of the binoculars according to the third embodiment. FIG. 10 is a diagram for explaining optical axis adjustment in the left-right direction of the binoculars according to the third embodiment. The side view of the binoculars of Example 3. FIG.

Explanation of symbols

OL, OR Optical axis of objective optical system EL, ER Optical axis of eyepiece optical system L1L, L1R Objective lens L2L, L2R Shake correction lens L3L, L3R Polo II type erecting prism L4L, L4R Eyepiece 2 Objective lens 4L, 4R Eyepiece tube 6L, 6R Eyepiece unit 7 Support base member 8L, 8R Interlocking plate 9 Focus support member 17 Optical axis adjustment member 18 Optical axis adjustment screw

Claims (2)

Left and right objective optics,
Left and right erecting optical systems that erect the optical images respectively formed by the left and right objective optical systems;
Left and right eyepiece optical systems that allow the observer to observe the upright optical image with both eyes;
The left and right objective optical systems include at least a part of the left and right optical elements that are held integrally.
Binoculars comprising an adjustment mechanism for rotating the left and right optical elements around an axis parallel to the optical axis of the left and right objective optical systems. The binoculars according to claim 1, wherein the left and right objective optical systems include left and right shake correction optical systems that are held so as to be integrated.