JP3673546B2 - Observation optical equipment - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an observation optical apparatus such as binoculars having an image blur correction function for deflecting an optical axis so that an optical image of an optical apparatus is always held at a fixed position.
[0002]
[Prior art]
Conventionally, as described in Japanese Industrial Standard Prism Binoculars (JIS B 7121) (FIG. 4), the structure of binoculars is a combination of left and right objective lenses 100, prism 101, and eyepiece lens 102 that are rotatable about a central axis. Eye width adjustment between the left and right eyepieces 102 is possible. In this case, the left and right optical axes are adjusted by moving the prism position to correct the center position of the optical axis as described in Japanese Utility Model Laid-Open No. 52-33866, or in Japanese Patent Application Laid-Open No. 57-33763. As described, there are a method of adjusting the optical axis by moving the objective lens eccentrically, and a method of adjusting the optical axis by moving the eyepiece lens in the same manner.
[0003]
In any of the methods, the shift between the left and right optical axes must be a predetermined amount or less when the eye width adjustment changes from the minimum width to the maximum width. That is, the binoculars that have undergone optical axis adjustment are adjusted so that the left and right optical axes are substantially parallel to the central axis L shown in FIG.
[0004]
[Problems to be solved by the invention]
In the optical axis adjustment as shown in the above conventional example, the optical path passing through the objective lens, the prism, and the eyepiece lens is set as the optical axis, and the left and right optical axes are made substantially parallel to the central axis of the eye width adjustment, and at the same time, the eye width is adjusted. In this case, the objective lens, the prism, and the eyepiece need to be rotated integrally with respect to the central axis.
[0005]
Therefore, in the case of binoculars having an image shake correction function in which a shake detection unit for detecting shakes of binoculars, a correction optical system for correcting shakes based on shake detection units, and an electric circuit including a control unit are mounted in the binoculars, Since the correction optical system is also a part of the optical path, when the conventional optical axis adjustment is performed, it is necessary to rotate about the central axis integrally with the objective lens, the prism, and the eyepiece when adjusting the eye width.
[0006]
However, an actuator and an electric circuit for driving the correction optical system are integrally fixed to the correction optical system, and in order to control the left and right correction optical systems based on the same shake detection means, It is desirable that the shake detection means of the correction optical system has a structure that does not rotate during eye width adjustment.
[0007]
Furthermore, it is necessary to mount the correction optical system between the objective lens and the erecting prism in order to reduce the size of the binoculars. In that case, the objective lens should also be structured so that it does not rotate during eye width adjustment. Is desirable.
[0008]
The purpose of the invention according to the present application is to make the correction optical system, shake detection means, objective lens, etc. immobile even when adjusting the eye width, and to rotate the erecting prism and the eyepiece integrally around the optical axis of the objective lens. It is an object of the present invention to provide an observation optical system apparatus that can perform appropriate optical axis adjustment even when the structure is one that changes the eye width.
[0009]
[Means and Actions for Solving the Problems]
A first configuration for realizing the object of the invention according to the present application is, as described in claim 1, a pair of objective optical systems arranged in parallel and an optical image from each objective optical system as an erect image. A pair of erecting prisms that reflect in this way, a pair of eyepiece optical systems that guide the optical images from the erecting prisms to the observation side, and a fixed member that does not move during eye width adjustment that holds the pair of objective optical systems And a pair of rotating frames that rotate with respect to the fixing member so that the eye width can be adjusted, and the one rotating frame holds the one erecting prism and the eyepiece optical system, and the other rotating frame. An observation optical apparatus that holds the other erecting prism and an eyepiece optical system, wherein at least one of the pair of objective optical systems is movable and adjustable in a direction perpendicular to the optical axis. One optical axis adjusting means and an upright stored in at least one of the pair of rotating frames Certain rhythm and ocular optical system for observation optical apparatus characterized by having a second optical axis adjustment means for relatively movable adjustment in a direction perpendicular to the optical axis.
[0010]
In this configuration, the first optical axis adjusting unit can adjust the optical axis of the objective optical system with respect to the fixed member, and the upright prism is held by a rotating frame that is rotatable with respect to the fixed member when adjusting the eye width. The optical axis of the eyepiece optical system can be adjusted by the second optical axis adjustment means, and the optical axis of the eyepiece optical system can be adjusted from the objective optical system. The optical axis can be adjusted without causing a deviation between the left and right optical axes even when the operation is performed.
[0011]
According to a second configuration for realizing the object of the present invention, a pair of objective optical systems arranged side by side and a pair of optical images from each objective optical system are moved. A correction optical system, a pair of erecting prisms that reflect the optical image from each correction optical system as an erect image, and a pair of eyepiece optical systems that guide the optical image from each erect prism to the observation side Based on the detection output of the shake detection means, a stationary member that does not move during eye width adjustment that holds the pair of objective optical systems and the pair of correction optical systems, the shake detection means that detects the shake of the optical device body, Drive control means for controlling the operation of the correction optical system, a circuit board on which an electric circuit including the control means is mounted, a battery for supplying power to the circuit board, and the fixing member so that the eye width can be adjusted. And a pair of rotating frames that rotate in rotation. An observation optical device that holds the one erecting prism and the eyepiece optical system and holds the other erecting prism and the eyepiece optical system on the other rotating frame, and includes the pair of objective optical systems. A first optical axis adjusting means that enables movement adjustment of at least one objective optical system in a direction orthogonal to the optical axis, an erecting prism held on at least one of the pair of rotating frames, and an eyepiece optical system; An observation optical apparatus comprising: a second optical axis adjustment unit capable of relatively moving and adjusting in a direction orthogonal to the axis.
[0012]
In this configuration, even if shake correction means such as a correction optical system is provided, the optical axis of the objective optical system can be adjusted by the first optical axis adjustment means with respect to the fixed member. The optical axis of the erecting prism held by the rotatable rotating frame and the eyepiece optical system can be adjusted by the second optical axis adjusting means, and the optical axis of the eyepiece optical system can be adjusted from the objective optical system. Even if the eye width adjustment is performed by rotating the pair of rotary frames, the optical axis can be adjusted without causing a deviation between the left and right optical axes.
[0013]
【Example】
(First embodiment)
FIG. 1 is a plan sectional view of binoculars according to a first embodiment of the present invention, and FIGS. 2 and 3 are views showing a part of FIG.
[0014]
In these drawings, reference numeral 1 denotes a first fixing member, 2 denotes a second fixing member, and is configured integrally with the first fixing member 1.
[0015]
Reference numeral 3 denotes a first objective lens barrel, and reference numeral 4 denotes a second objective lens barrel, each having mounting holes 3a, 3b and 4a, 4b. The first objective lens barrel 3 and the second objective lens barrel 4 are fixed to the first fixing member 1 with mounting screws 5, 6 and 7, 8, respectively. Here, the mounting holes 3a, 3b, 4a and 4b are set to have a slightly larger hole diameter than the mounting screws 5, 6, 7 and 8 before the mounting screws 5, 6, 7 and 8 are tightened. The objective lens barrels 3 and 4 can be moved in the direction perpendicular to the optical axis. L1R and L1L are objective lenses, which are held by the objective lens barrels 3 and 4, respectively. Reference numeral 9 denotes a first rotating frame, and reference numeral 10 denotes a second rotating frame, which are rotatably supported by second fixing members. Here, the central axis of rotation of the first rotating frame 9 substantially coincides with the optical axis of the objective lens L1R, and the central axis of rotation of the second rotating frame 10 is substantially equal to the optical axis of the objective lens L1L. I'm doing it.
[0016]
L2R and L2L are eyepiece lenses, which are held by the first rotating frame 9 and the second rotating frame 10, respectively. 11 is a first prism holder, and 12 is a second prism holder. As shown in FIG. 2, the first prism holder 11 is held by the first rotating frame 9 with screws 14a, 14b, and 14c via springs 13a, 13b, and 13c. It is possible to adjust the inclination with respect to the optical axis of the eyepiece L2R.
[0017]
Similarly to the first prism holder 11, the second prism holder 12 is also held by the second rotary frame 10 with screws 16a, 16b, and 16c via springs 15a, 15b, and 15c, and screws 16a, 16b, and 16c. It is possible to adjust the inclination with respect to the optical axis of the eyepiece lens L2L with the degree of tightening.
[0018]
L3R and L3L are front prisms, and L4R and L4L are rear prisms. The front prism L3R and the rear prism L4R are held by the first prism holder 11, and the front prism L3L and the rear prism L4L are held by the second prism holder 12.
[0019]
Reference numeral 29 denotes a first interlocking plate, and reference numeral 30 denotes a second interlocking plate, which are fixed to the first prism holder 11 and the second prism holder 12 with screws 31 and 32, respectively. The first interlocking plate 29 and the second interlocking plate 30 are provided with gear portions 29a and 30a, respectively, and these gear portions 29a and 30a mesh with each other, and the first rotating frame 9 and the second interlocking plate 30 are engaged with each other. The rotation frame 10 is interlocked. As a result, when the first rotating frame 9 and the second rotating frame 10 are rotated, the first rotating frame 9 and the second rotating frame 10 are rotated by the same angle with respect to the second fixing member 2, and thereby the eye width can be adjusted.
[0020]
Reference numeral 17 denotes a first variable apex angle prism (VAP) unit, and reference numeral 18 denotes a second apex angle prism (VAP) unit.
[0021]
The first VAP unit 17 is disposed between the objective lens L1R and the front prism L3R, and the second VAP unit 18 is disposed between the objective lens L1L and the front prism L3L, and is fixed to the first fixing member 1. ing. A VAP element 21 is accommodated in the main body 19 of the first VAP unit 17.
[0022]
The VAP element 21 is liquid-tightly connected between two transparent plates by a bellows, and a transparent liquid having a predetermined refractive index is accommodated therein.
[0023]
As shown in FIG. 3, the VAP element 21 is held by holding frames 23 a and 23 b, and an electromagnetic actuator is formed by coil portions 25 a and 25 b formed on the holding frames 23 a and 23 b and a magnet portion 27 formed on the main body 19. The transparent plate on the objective lens L1R side of the VAP element 21 is tilted in the pitch (vertical) direction and the transparent plate on the front prism L3R side is tilted in the yaw (horizontal) direction. Thereby, the light beam passing through the VAP element 21 is deflected. Similarly, a VAP element 22 is accommodated in the main body 20 of the second VAP unit 18.
[0024]
The VAP element 22 is liquid-tightly connected between two transparent plates by a bellows, and a transparent liquid having a predetermined refractive index is accommodated therein. As shown in FIG. 3, the VAP element 2a is held by holding frames 24a and 24b, and coil portions 26a and 26b formed on the holding frames 24a and 24b and a magnet portion 28 formed on the main body 20 constitute an electromagnetic actuator. As a result, the transparent plate on the objective lens L1L side of the VAP element 22 is tilted in the pitch (vertical) direction, and the transparent plate on the front prism L3L side is tilted in the yaw (horizontal) direction. Thereby, the light beam passing through the VAP element 22 is deflected.
[0025]
A control circuit board 33 accommodates a circuit for controlling driving of the first VAP unit 17 and the second VAP unit 18 and is electrically coupled to the first and second VAP units 17 and 18. . The control circuit board 33 is fixed to the first fixing member 1 with screws 36 and 37.
[0026]
Reference numerals 34 and 35 denote shake detection sensors. The shake detection sensor 34 detects the shake in the vertical direction of the entire binoculars, and the shake detection sensor 35 detects the shake in the horizontal direction. The shake detection sensors 34 and 35 are mounted on the control circuit board 33. Reference numeral 38 denotes a battery case, in which a battery is accommodated, and power can be supplied to the control circuit board 33 by a lead wire (not shown). A front cover 39 is formed with a hole so as not to block the light flux of the objective lenses L1R and L1L, and is fixed to the first fixing member 1.
[0027]
Next, the optical axis adjustment and operation of the binoculars of the above-described embodiment will be described.
[0028]
First, with the first VAP unit 17 and the second VAP unit 18 attached to the first fixing member, the transparent plates on the objective lenses L1R, L1L side of the VAP elements 21, 22 and the front prisms L3R, L3L side Make electrical adjustments so that the transparent plates are parallel. Further, the first objective lens barrel 3 and the second objective lens barrel 4 holding the objective lenses L1R and L1L are moved in the direction perpendicular to the optical axis, and the optical axis of the light flux passing through the objective lens L1R and the VAP element 21. (Hereinafter referred to as the first objective optical axis) and the optical axis of the light beam passing through the objective lens L1L and the VAP element 22 (hereinafter referred to as the second objective optical axis) are respectively the first rotating frame 9 and the second rotation. Adjustment is performed so as to coincide with the central axis of rotation of the frame 10. Here, the central axis of rotation of the first rotating frame 9 and the second rotating frame 10 can be adjusted substantially parallel by increasing the mechanical accuracy of the respective rotating sliding surfaces of the second fixing member 2. After that, the first objective optical axis and the second objective optical axis are adjusted to be substantially parallel.
[0029]
Next, the first prism holder 11 and the second prism holder 11 holding the front prisms L3R and L3L and the second prisms L4R and L4L in a state where the eyepiece lenses L2R and L2L are held by the first rotary frame 9 and the second rotary frame 10, respectively. By adjusting the tightening of the screws 14a, 14b, 14c and 16a, 16b, 16c of the prism holder 12, the optical axis of the light beam passing through the front prism L3R, the rear prism L4R, and the eyepiece L2R (hereinafter referred to as the first eyepiece system). The optical axis of the light beam passing through the front prism L3L, the rear prism L4L, and the eyepiece lens L2L (hereinafter referred to as the second eyepiece system optical axis), respectively. Make adjustments so that it matches the center axis. Here, the central axis of rotation of the first rotating frame 9 and the second rotating frame 10 can be made substantially parallel by increasing the mechanical accuracy of the respective rotating sliding surfaces of the second fixing member 2. After the adjustment, the first eyepiece optical axis and the second eyepiece optical axis are adjusted substantially in parallel.
[0030]
By the adjustment described above, the first objective optical axis and the first eyepiece optical axis coincide with the central axis of rotation of the first rotary frame 9, and the second objective optical axis and the second eyepiece system. Since the optical axis coincides with the central axis of rotation of the second rotary frame 10, the left and right sides of the left and right frames can be adjusted even when the eye width is adjusted by rotating the first rotary frame 9 and the second rotary frame 10. A good image can be observed without tilting the optical axis.
[0031]
With the binoculars with the optical axis adjusted as described above, the observer rotates the first rotary frame 9 and the second rotary frame 10 inward or outward to adjust the eye width.
[0032]
Further, when the observer operates a switch (not shown), the first VAP unit 17 and the second VAP unit 18 are in a shake correction state, and the VAP elements 21 and 22 are moved based on the outputs of the shake detection sensors 34 and 35. It is possible to observe an image that is tilted and in which image shake due to camera shake or the like is corrected. Further, when the observer releases the operation of the switch (not shown), the VAP elements 21 and 22 are returned to the originally adjusted state, the shake correction state is released, and an image as normal binoculars can be observed. .
[0033]
In the above embodiment, the optical axis adjustment of the eyepiece system is performed by tilting the prism holders 11 and 12 holding the front prisms L3R and L3L and the rear prisms L4R and L4L. However, the optical axis adjustment is performed by decentering the eyepiece lenses L2R and L2L. Of course, this may be performed.
[0034]
In the above description, after adjusting the left and right objective lenses so as to coincide with the rotation center axes of the left and right rotation frames, the left and right prism holders are respectively set to the rotation center axes of the left and right rotation frames. Although an example in which the matching is performed is described, the objective lens may be adjusted after the left and right prism holders are first aligned with the rotation centers of the left and right rotating frames, respectively.
[0035]
Further, in the above-described embodiment, an example in which the optical axes of the first and second objective optical axes and the first and second eyepiece optical axes are adjusted has been described. If the required accuracy of the adjustment is not strict, for example, the first objective optical axis and the first eyepiece optical axis are not adjusted, and only the second objective optical axis and the second eyepiece optical axis are adjusted. Sometimes it is good.
[0036]
【The invention's effect】
According to the first aspect of the present invention, the optical axis of the objective optical system can be adjusted by the first optical axis adjusting means with respect to the fixed member, and the rotary frame can be rotated with respect to the fixed member when adjusting the eye width. The optical axis of the erecting prism held by the eyepiece and the eyepiece optical system can be adjusted by the second optical axis adjustment means, and the optical axis of the eyepiece optical system can be adjusted from the objective optical system. Even if the eye width adjustment is performed by moving the optical axis, the optical axis can be adjusted without causing a deviation between the left and right optical axes.
[0037]
According to the second aspect of the present invention, the optical axis of the objective optical system can be adjusted by the first optical axis adjusting unit with respect to the fixed member even when the shake correcting unit such as the correcting optical system is provided. The optical axis of the erecting prism and the eyepiece optical system that are held by a rotating frame that can be rotated with respect to the fixed member at the time of adjustment can be adjusted by the second optical axis adjustment means. Since the adjustment can be performed, the optical axis can be adjusted so that the left and right optical axes do not shift even if the eye width is adjusted by rotating the pair of rotary frames.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of binoculars showing a first embodiment of the present invention.
FIG. 2 is a plan view showing a mounting structure of the prism holder of FIG.
3 is a perspective view of a holding frame of the VAP element shown in FIG.
FIG. 4 is a plan view of conventional binoculars.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 1st fixing member 2 2nd fixing member 3 1st objective lens 4 2nd objective lens 9 1st rotation frame 10 2nd rotation frame 11 1st prism holder 12 2nd prism holder 17 1st 1 VAP unit 18 2nd VAP unit

Claims (2)

A pair of objective optical systems arranged side by side, a pair of erecting prisms that reflect an optical image from each objective optical system as an erect image, and an optical image from each erecting prism are guided to the observation side. A pair of eyepiece optical systems, a fixed member that does not move during eye width adjustment that holds the pair of objective optical systems, and a pair of rotating frames that rotate relative to the fixed member so that the eye width can be adjusted; An observation optical apparatus in which the one erecting prism and the eyepiece optical system are held in the one rotating frame, and the other erecting prism and the eyepiece optical system are held in the other rotating frame,
A first optical axis adjusting means capable of moving and adjusting at least one of the pair of objective optical systems in a direction perpendicular to the optical axis; and a positive optical axis stored in at least one of the pair of rotating frames. An observation optical apparatus comprising: a second optical axis adjustment unit that can relatively move and adjust the vertical prism and the eyepiece optical system in a direction orthogonal to the optical axis. A pair of objective optical systems arranged side by side, a pair of correction optical systems that move an optical image from each objective optical system, and a pair that reflects the optical image from each correction optical system as an erect image An erecting prism, a pair of eyepiece optical systems that guide the optical images from the erecting prisms to the observation side, and a fixed fixed during eye width adjustment that holds the pair of objective optical systems and the pair of correction optical systems A member, a shake detection means for detecting a shake of the optical apparatus body, a drive control means for controlling the operation of the correction optical system based on a detection output of the shake detection means, and an electric circuit including the control means are mounted. A circuit board, a battery for supplying electric power to the circuit board, and a pair of rotating frames that rotate with respect to the fixing member so that the eye width can be adjusted, and the one erecting prism on the one rotating frame And the eyepiece optical system, and the other rotating frame to the other The standing prism and the eyepiece optical system to a viewing optical apparatus and held,
A first optical axis adjusting means capable of moving and adjusting at least one of the pair of objective optical systems in a direction perpendicular to the optical axis; and a positive optical axis held by at least one of the pair of rotating frames. An observation optical apparatus comprising: a second optical axis adjustment unit that can relatively move and adjust the vertical prism and the eyepiece optical system in a direction orthogonal to the optical axis.

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