JP2005128305A - Binocular magnifier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a binocular magnifier in which magnification of magnifying optical system units is changed in accordance with an operating part. <P>SOLUTION: In the binocular magnifier 10, spectacle lenses 12 and 13 are mounted on a frame 11, and left and right magnifying optical system units 14 and 15 which are used to magnify an object for observation, are adhered to the center sections of the lenses. The magnifying optical system unit 14 is provided with an objective lens 14a, an eyepiece 14b and a roof-prism 14c. The objective lens 14a is integrated into an objective lens barrel 20 and the roof-prism 14c is integrated into a housing 30. The objective lens barrel 20 is provided with a screw type engaging section 20b and a screw type mounting section 31a is formed on an objective plate 31 which is located opposite to a first surface A of the roof-prism 14c. The objective plate 31 is mounted onto a side surface plate 34 by screws 35 in an attachable and detachable manner so as to clean the first surface A by detaching. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a binocular magnifier for magnifying and observing an object at hand with binocular.

  In an operation for treating a fine tissue such as a brain surgery, a doctor performs an operation while observing the treatment portion in an enlarged manner. In addition, it is desirable to use a binocular magnifier in order to observe the treatment portion in three dimensions. Patent Document 1 discloses a binocular magnifying glass configured by forming openings in the central part of the left and right lenses of spectacles and attaching a magnifying optical system unit to these openings.

Note that the doctor may want to change the magnification of the magnifier when the surgical site changes.
Japanese Patent Laid-Open No. 2003-195185 FIG.

  However, in the binocular magnifier disclosed in Patent Document 1, the configuration of the magnifying optical system unit is fixed, and the magnification cannot be easily changed.

  The present invention has been made in view of the above-described problems of the prior art, and its main object is to provide a binocular magnifier capable of changing the magnification of the magnifying optical system unit according to the surgical site. is there. In addition, the first subordinate object of the present invention is to provide a configuration that can easily remove foreign matter that enters the optical system during replacement and obstructs the field of view, on the premise of replacing the objective lens for zooming. There is to do. Furthermore, a second subordinate object of the present invention is to provide a configuration in which the replaceable objective lens does not fall off unexpectedly, on the premise that the objective lens is replaced for zooming.

  The binocular magnifying glass according to the first aspect of the present invention incorporates the right and left spectacle lenses in the spectacle frame and magnifies and observes the object in the spectacle lens in order to achieve the main object and the first subordinate object. In a configuration in which left and right magnifying optical system units are mounted respectively, the left and right magnifying optical system units are provided with an objective lens having a positive power and an eyepiece having a positive power, and an object is magnified and observed. A real image type magnifying optical system, and a roof prism arranged between the objective lens and the eyepiece lens to erect an image formed by the objective lens, and the objective lens is incorporated in the objective lens barrel, The Dach prism is assembled in a housing fixed to the spectacle lens, and the housing includes an objective plate on which an objective mount portion on which the objective lens barrel is mounted is formed. Objects plate covers the optical surface on the side of the roof prism closer to the objective lens, and is characterized in that is detachably attached to the other member of the housing. The optical surface is a glass polished surface that is assumed to transmit or reflect a regular light beam.

  In addition, a binocular magnifier according to a second aspect of the present invention includes a real image type magnifying optical system unit based on the same premise as described above in order to achieve the above-described main object and the second subordinate object. The lens is built into the objective lens barrel, the roof prism is built into the housing fixed to the spectacle lens, and the objective mount is mounted on the housing to prevent the objective lens barrel from falling off. A drop prevention mechanism is provided.

  In any of the above aspects, the objective lens barrel may be provided with a screw-type engagement portion, and the mount portion may be a screw-type mount portion that is screwed into the engagement portion.

  Further, the drop-off prevention mechanism in the second aspect is engaged with the guide portion that protrudes around the mount portion of the housing, the guide portion from the direction perpendicular to the optical axis of the objective lens, and the objective lens barrel. And a gutter for entering the groove formed along the circumferential direction and fixing the objective lens barrel to the guide portion.

  According to the present invention, the magnification of the magnifying optical system can be changed by housing the objective lens in the objective lens barrel and unitizing it, and replacing the objective lens with a lens having a different focal length for each barrel. it can. However, when the objective lens barrel is replaced, foreign matter such as metal powder generated by sliding between the lens barrel and the mount portion at the time of replacement or external dust may adhere to the optical surface of the roof prism. When the observation object is observed from the eyepiece side in this state, there is a possibility that the powder or dust attached to the optical surface will stand out in the field of view and hinder the observation. In the first aspect, the objective plate that covers the optical surface on the objective lens side is made detachable from other members of the housing, so that the objective plate can be used even when dust or dust adheres to the optical surface of the prism. These can be easily removed by removing and cleaning.

  On the other hand, if the objective lens is incorporated into the objective lens barrel and can be exchanged as described above, the objective lens barrel falls off, for example, when the screw type engaging portion is not sufficiently screwed into the mount portion. There is a fear. If the objective lens barrel falls off and touches the surgical site during surgery, a serious accident can occur. According to the second aspect of the present invention, by providing the housing with a drop prevention mechanism for preventing the drop of the objective lens barrel, it is possible to prevent an accident from occurring due to the fall of the objective lens barrel. Can do.

  Hereinafter, embodiments of the binocular magnifier according to the present invention will be described. 1 is a side sectional view showing a configuration of a magnifying optical system unit of a binocular magnifying glass according to a first embodiment, FIG. 2 is a front view of the binocular magnifying glass of FIG. 1, and FIG. 3 is a magnifying optical of FIG. FIG. 4 is a side view of only the optical system taken out from the system unit, and FIG. 4 is a side view of the magnifying optical system unit of FIG.

  As shown in FIG. 2, the binocular magnifier 10 according to the first embodiment has left and right eyeglass lenses 12 and 13 attached to a frame 11, and the pupil position of the user at the center of these eyeglass lenses 12 and 13. The left and right magnifying optical system units 14 and 15 for magnifying and observing an object in these openings are formed as openings (symbol 12a in FIG. 1 for the left-eye lens 12). It is comprised by adhere | attaching.

  The frame 11 includes rims 11a and 11b that hold the lenses 12 and 13, a bridge 11c that connects the left and right rims 11a and 11b, pads 11d and 11e that are nose pads arranged inside the rim, and ears outside the rim. It consists of temples 11f and 11g for hanging.

  As shown in FIG. 3, the optical system of the magnifying optical system unit 14 (hereinafter, the magnifying optical system unit 14 for the left eye will be described, but the magnifying optical system unit 15 for the right eye has the same configuration) A real image type magnifying optical system for magnifying and observing an object with an objective lens 14a having a positive power and an eyepiece 14b having a positive power, and disposed between the objective lens 14a and the eyepiece 14b. The roof prism 14c deflects the optical path of the magnifying optical system to one side and erects the image.

  Light from the observation target incident from the objective lens 14a enters the roof prism 14c from the first surface A, is totally reflected by the second surface B, reflected by the roof surface C, totally reflected by the first surface A, and first reflected. The light passes through the second surface B and reaches the left eye EL of the user through the eyepiece 14b. The user observes the real image formed by the objective lens 14a through the eyepiece 14b. This real image is formed in the vicinity of the position where the first surface A is totally reflected.

  As shown in FIG. 1, the objective lens 14 a and the eyepiece lens 14 b are incorporated in the objective lens barrel 20 and the eyepiece lens barrel 21, respectively, and the roof prism 14 c is incorporated in the housing 30. The objective lens barrel 20 and the eyepiece lens barrel 21 include cylindrical lens holding portions 20a and 21a, and screw-type engaging portions 20b and 21b having a smaller diameter and a thread groove formed on the outer periphery thereof. .

  On the other hand, the housing 30 is a cover that covers the objective plate 31 disposed to face the first surface A of the roof prism 14c, the eyepiece 32 disposed to face the second surface B, and the roof surface C of the roof prism 14c. 33 and a pair of side plates 34 (see FIG. 4) covering the left and right side surfaces of the roof prism 14c. The objective plate 31, the eyepiece plate 32, and the side plate 34 are flat plates, and the cover 33 is formed in a roof shape along the shape of the roof surface C. At the center of the objective plate 31 and the eyepiece plate 32, a screw-type mount portion 31a, which is a female screw hole that engages with engaging portions 20b and 21b formed on the objective lens barrel 20 and the eyepiece lens barrel 21, respectively. 32a is formed.

  When the magnifying optical system unit 14 is assembled, the objective plate 31 is temporarily fixed to the left and right side plates 34 with two screws 35 on the left and right sides, and the eyepiece 32 is similarly fixed with the four screws 36 on the side plate 34. The lower part of the housing 30 is formed by temporarily fixing to. Next, a double-sided tape is attached to the four corners of the second surface B of the roof prism 14c, and is inserted into the lower portion of the temporarily fixed housing 30, and the second surface B is adhered to the eyepiece plate 32. Subsequently, the screws 35 and 36 are tightened to fix the lower portion of the housing 30, and the cover 33 is fixed to the lower portion with screws (not shown). The roof prism 14 c is fixed by applying the tips of a plurality of set screws (not shown) screwed into the left and right side plates 34. Next, the objective lens barrel 20 incorporating the objective lens 14a and the eyepiece lens barrel 21 incorporating the eyepiece 14b are screwed and fixed to the objective plate 31 and the eyepiece plate 32, respectively.

  The enlarged optical system unit 14 that has been assembled is inserted into the opening 12 a of the spectacle lens 12, and an adhesive is filled around the eyepiece lens barrel 21 to be fixed to the spectacle lens 12. The right-eye magnifying optical system unit 15 is also assembled and fixed to the spectacle lens 13 in the same manner as described above. The magnifying optical units 14 and 15 are designed based on the user's spectacle prescription, working distance (working distance), and magnification of the magnifying glass, and according to the distance between the pupils of the user. , 13 are fixed at appropriate positions.

  At the time of use, the user wears the binocular magnifier 10 and magnifies and observes an object such as a surgical site via the right and left magnification optical system units 14 and 15. When changing the observation magnification, the objective lens barrel 20 is loosened and removed, and a lens barrel incorporating objective lenses having different focal lengths prepared in advance is attached. Thus, if a plurality of objective lens barrels are prepared, the observation magnification can be easily changed as necessary.

  It should be noted that foreign matter such as metal powder or external dust generated by sliding between the lens barrel engaging portion 20a and the mount portion 31b of the objective plate 31 when the objective lens barrel is replaced is the first surface of the roof prism. It may adhere to A (optical surface). This first surface A is close to the imaging surface of the magnifying optical system, particularly in the case of the present embodiment. Conspicuous and obstructs observation. Therefore, when a foreign substance adheres, the screw 35 is loosened, the objective plate 31 is removed, and the first surface A is cleaned. In this way, by configuring the objective plate 31 to be detachable, it is possible to solve the problem that the foreign matter adhering to the objective lens replacement obstructs the visual field.

  Next, a binocular magnifier according to the second embodiment will be described with reference to FIGS. The schematic configuration of the second embodiment is common to the binocular magnifier 10 of the first embodiment. That is, the magnifying optical system unit is mounted at the center of the left and right eyeglass lenses, and each magnifying optical system unit is composed of a real-image magnifying optical system including an objective lens and an eyepiece lens and a roof prism. . However, the second embodiment is different from the first embodiment in that the housing 30 is provided with a drop-off prevention mechanism that prevents the objective lens barrel 20 from dropping off. Hereinafter, description will be made by taking the magnifying optical system unit 14 for the left eye as an example.

  FIG. 5 is a side view of a magnifying optical system unit incorporated in a binocular magnifier according to the second embodiment, FIG. 6 is a side view showing an objective lens barrel of the unit of FIG. 5, and FIG. FIG. 8 is a plan view showing the flange 50 of the unit shown in FIG.

  As shown in FIG. 5, the magnifying optical system unit 14 includes an objective lens barrel 40 incorporating an objective lens and an eyepiece lens barrel 21 incorporating an eyepiece, respectively, as in the first embodiment. Are fixed by being screwed into the objective plate 31 and the eyepiece plate 32 of the housing 30 for housing the housing.

  As shown in FIG. 6, the objective lens barrel 40 has a cylindrical lens holding portion 41 for storing an objective lens (not shown), and a screw type engagement having a smaller diameter and a thread groove formed on the outer periphery. An annular groove 41a is formed along the circumferential direction on the outer periphery of the lens holding portion 41 on the engaging portion 42 side. On the other hand, on the objective plate 31, as shown in FIG. 7, guide portions 31b are formed so as to protrude at four locations around the attachment position of the objective lens barrel 40. The guide part 31b is a protrusion in which engagement grooves that open toward the upper and lower outer sides are formed along the left-right direction, and the cross section is a U-shape.

  The objective lens barrel 40 is screwed into the objective plate 31, and a U-shaped ridge 50 as shown in FIG. 8 is arranged along the direction perpendicular to the optical axis of the objective lens (from the left side in FIG. 7) to the guide portion 31b. When inserted into the mating groove, the flange 50 enters the groove 41a of the objective lens barrel 40 and fixes the objective lens barrel to the guide portion 31b. The guide part 31b, the groove 41a, and the flange 50 constitute a drop prevention mechanism for preventing the objective lens barrel 40 from dropping.

  According to the second embodiment, since the collar 50 cannot be attached unless the objective lens barrel 40 is screwed to the end, it is possible to prevent the lens barrel from being used with loose fitting. Further, since the movable range in the optical axis direction is limited by the flange 50, even if the lens barrel is somewhat loosened, the engaging portion 42 of the lens barrel does not completely come out of the housing 30, and the objective lens barrel 40 Can be prevented from falling off.

It is side surface sectional drawing which shows the structure of the expansion optical system unit of the binocular magnifier concerning 1st Embodiment. It is a front view of the binocular magnifier of FIG. It is the side view which took out only the optical system from the expansion optical system unit of FIG. It is a side view of the expansion optical system unit of FIG. It is a side view of the magnifying optical system unit incorporated in the binocular magnifier according to the second embodiment. It is a side view which shows the objective lens barrel of the unit of FIG. It is the front view which looked at FIG. 5 from the objective-lens barrel side. It is a top view which shows the collar of the unit of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Binocular magnifier 11 Eyeglass frame 12, 13 Eyeglass lens 14, 15 Magnification optical system unit 14a Objective lens 14b Eyepiece 14c Dach prism 20 Objective lens barrel 21 Eyepiece lens barrel 30 Housing 31 Objective plate 32 Eyepiece 33 Cover 34 Side plate 40 Objective lens barrel 41a Groove 50mm

Claims (4)

In a binocular magnifying glass constructed by incorporating left and right eyeglass lenses in a spectacle frame and attaching left and right magnifying optical system units for magnifying and observing an object on each spectacle lens,
The left and right magnifying optical system units include an objective lens having a positive power and an eyepiece having a positive power, and a real-image magnifying optical system for magnifying and observing an object, and the objective lens and the eyepiece A roof prism arranged between the lens and erecting an image formed by the objective lens,
The objective lens is incorporated in an objective lens barrel,
The roof prism is incorporated in a housing,
The housing includes an objective plate on which an objective mount portion to which the objective lens barrel is attached is formed,
The binocular magnifier characterized in that the objective plate covers the optical surface of the roof prism on the side close to the objective lens and is detachably attached to other members of the housing. In a binocular magnifying glass constructed by incorporating left and right eyeglass lenses in a spectacle frame and attaching left and right magnifying optical system units for magnifying and observing an object on each spectacle lens,
The left and right magnifying optical system units include an objective lens having a positive power and an eyepiece having a positive power, and a real-image magnifying optical system for magnifying and observing an object, and the objective lens and the eyepiece A roof prism arranged between the lens and erecting an image formed by the objective lens,
The objective lens is incorporated in an objective lens barrel,
The roof prism is incorporated in a housing fixed to the spectacle lens,
The binocular magnifier according to claim 1, wherein the housing is provided with a mount portion on which the objective lens barrel is mounted and a drop prevention mechanism for preventing the objective lens barrel from falling off.   The objective lens barrel includes a screw-type engaging portion, and the mount portion is a screw-type mount portion that is screwed into the engaging portion. Binocular magnifier.   The drop-off prevention mechanism engages with the guide unit from a direction perpendicular to the optical axis of the objective lens, and a guide unit formed to project around the mounting position of the objective lens barrel of the housing. The binocular magnifying apparatus according to claim 2, further comprising a ridge that enters a groove formed in a circumferential direction on an outer periphery of the lens barrel and fixes the objective lens barrel to the guide portion. mirror.

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