Head-mounted magnifier

Abstract

To provide a head-mounted type loupe that can match imaging with a view line of a wearer, and can magnify a deep hole or a deep part of a small hole of an aperture diameter accurately and stably.SOLUTION: A head-mounted type loupe comprises: a convergence angle contraction member that has a pair of right and left first view line refractive members 22 and 22 refracting right and left view lines S and S to an inner side respectively, and a pair of right and left second view line refractive members 24 and 24 refracting forward each of view lines S and S refracted by the first view line refractive members 22 and 22; and further an optical axis refractive member 32 that is disposed between a magnifier 5 and the second view line refractive members 24 and 24, transmits forward each of the view lines S and S refracted by the second view line refractive members 24 and 24, refracts an optical axis of a camera member, and matches the optical axis thereof with one view line S. According to this configuration, a convergence angle θ of the view lines S and S can be made small, and thus, a deep part 62 of a deep hole 61 can be magnified, and the deep part 62 can be imaged with an eye line of a wearer.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a head-mounted magnifying glass that is mounted on the head of a wearer and allows the wearer to view an object in a magnified view. [Background technology]

[0002] For example, Patent Document 1 proposes a binocular loupe that is mainly used in the medical field. This binocular loupe is worn on the head of a wearer, allowing the wearer to view an object in a magnified view, and is further provided with a camera that captures an image of the object. With this configuration, when a surgeon wears the loupe and performs surgery, the object viewed by the surgeon can be captured by the camera and displayed or recorded. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2003-204972 A Summary of the Invention [Problem to be solved by the invention]

[0004] The conventional configuration of Patent Document 1 described above allows the wearer to magnify the object through the lenses located in front of the left and right eyes, respectively, and is extremely convenient when viewing a relatively widely exposed area, but when viewing a deep hole or a hole with a small opening diameter, for example, it is difficult to focus on the deep part of the hole and to view the deep part. Therefore, in order to view the deep part of such a hole, it is necessary to view with only one eye, but there is a problem that it is difficult to view the object three-dimensionally when using only one eye.

[0005] In addition, in the conventional configuration of Patent Document 1, the camera is disposed above the loupe, so the optical axis of the camera from the camera lens to the object does not match the line of sight of the wearer who is looking at the object through the loupe. As a result, the line of sight of the wearer is misaligned with the image captured by the camera, and the situation the wearer is looking at may not be conveyed accurately.

[0006] The present invention provides a head-mounted magnifying glass that can capture an image aligned with the wearer's line of sight and can accurately and stably magnify and view the deep portion of a deep hole or a hole with a small opening diameter. [Means for solving the problem]

[0007] The present invention relates to a head-mounted loupe that can magnify an object and includes a head-mounted part that is mounted on the head of a wearer, and a magnifying glass that is attached to the head-mounted part and that is arranged in front of the wearer's eyes when the head-mounted part is mounted on the head of the wearer and is in use, the head-mounted loupe having a pair of first line-of-sight refracting members that are arranged behind the magnifying glass and in front of the wearer's left and right eyes, respectively, and that refract the left and right lines of sight inward, respectively, and a pair of second line-of-sight refracting members that are arranged behind the magnifying glass and between the left and right first line-of-sight refracting members, respectively, and that refract the left and right lines of sight refracted by the first line-of-sight refracting members forward, and the left and right lines of sight via the first line-of-sight refracting member and the second line-of-sight refracting member are arranged in a direction parallel to the eye. a convergence angle reduction means for reducing the convergence angle of the line of sight of the magnifying glass compared to the convergence angle of the left and right lines of sight that do not pass through the first and second line of sight refraction members, and further comprising an optical axis refraction member arranged between the magnifying glass and the second line of sight refraction member, and a camera member capable of capturing still or moving images of the object through the optical axis refraction member, wherein the optical axis refraction member passes the line of sight refracted by the second line of sight refraction member forward to allow the object to be viewed through the magnifying glass, and refracts the optical axis of the camera member to align the refracted optical axis with one of the left and right lines of sight of the wearer.

[0008] In this configuration, the convergence angle between the left and right lines of sight is reduced by the convergence angle reduction means, so that the lines of sight can easily pass through deep holes or holes with small opening diameters, and the deep parts of these holes can be viewed in a magnified manner. And, since the deep parts can be viewed with both the left and right eyes, the deep parts (objects) can be viewed in a three-dimensional manner. Thus, according to the configuration of the present invention, the deep parts of deep holes or holes with small opening diameters can be viewed in a magnified manner accurately and stably.

[0009] Furthermore, in the configuration of the present invention, the optical axis of the camera member coincides with the line of sight with the convergence angle reduced by the convergence angle reduction means, so that an image can be captured from the wearer's line of sight. This allows a person viewing an image captured by the camera member to view an object from the same line of sight as the wearer, making it easier to accurately understand the situation the wearer is viewing. According to the configuration of the present invention, when a wearer views the deep part (object) of a deep hole or a hole with a small opening diameter, other people can view the deep part from the same line of sight as the wearer through the image captured by the camera member.

[0010] In the head-mounted magnifying glass of the present invention described above, the optical axis refracting member is proposed to be a cubic prism formed by integrating two right-angle prisms by overlapping their inclined faces, which are arranged symmetrically in front of the left and right second line of sight refracting members, and the left and right lines of sight refracted by each second line of sight refracting member, respectively, are passed forward by the left and right cubic prisms.

[0011] Here, the two cubic prisms constituting the optical axis refraction member are preferably provided with an anti-reflection coating on two surfaces (the surface facing the magnifying glass and the surface facing said surface) through which the line of sight refracted by the second line of sight refraction member of the convergence angle reduction means passes, and on the surface facing the camera lens of the camera member, and with a black coating on the remaining three surfaces to suppress the input and output of light.

[0012] In this configuration, the optical axis refraction member is a so-called beam splitter, and can split the incident light from the front into transmitted light that passes through the rear surface and reflected light that is reflected on the inclined surface and heads toward the side. The wearer receives the transmitted light through the optical axis refraction member, and the camera member receives the reflected light, so that the line of sight of the wearer and the line of sight axis of the camera member can be aligned, and the effect of the present invention described above, that the camera member captures an image from the line of sight of the wearer, can be stably achieved.

[0013] Furthermore, in this configuration, the two cube prisms are arranged symmetrically, so that the left and right lines of sight pass through each cube prism in the same way, allowing the object to be viewed more accurately and stably. Effect of the Invention

[0014] According to the head-mounted loupe of the present invention, the camera member can take an image at the same eye level as the wearer, and can accurately and stably view the deep part of a deep hole or a hole with a small opening diameter. This allows the deep part of a deep hole or a hole with a small opening diameter to be imaged at the same eye level as the wearer. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view showing a head mounted magnifier 1 according to an embodiment. [Diagram 2] 1A is a side view showing the head mounted loupe 1 in use, and FIG. 1B is a side view showing the head mounted loupe 1 in a standby state. [Diagram 3] 1A and 1B are front and rear perspective views respectively showing a convergence angle reducing member 3, an object imaging member 4, and a magnifying glass 5 in a separated state. [Figure 4] 2A is a perspective view of an optical axis refracting member 32, and FIG. 2B is an exploded perspective view of the optical axis refracting member 32. [Diagram 5] 1A and 1B are a plan view and a perspective view, respectively, illustrating the positional relationship between a magnifying mirror 5, an optical axis refracting member 32, and a convergence angle reducing member 3. FIG. [Figure 6]1A is an explanatory diagram showing lines of sight S, S through a convergence angle reduction member 3, and FIG. 1B is an explanatory diagram showing lines of sight S', S' through a binocular loupe 101 of a conventional configuration. [Figure 7] 2 is an explanatory diagram showing the lines of sight S, S of a wearer and the line of sight axis P of a camera member 33 in a head mounted magnifying glass 1. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] An embodiment of the present invention will be described with reference to the attached drawings. In the embodiment, the front-rear direction indicates the front-rear direction of a wearer wearing the head-mounted loupe 1 of the embodiment, and the left-right direction indicates the left-right direction of the wearer. In the left-right direction, the direction from the outside of the left and right toward the center of the wearer is defined as the inward direction. Furthermore, in the embodiment, the front side and the front side are used in the same sense.

[0017] 1 and 2, the head mounted magnifier 1 of the embodiment includes a head belt section 2 that is mounted on the head of the wearer, a convergence angle reducing member 3 attached to the center of the head belt section 2 via a connecting member 7, a visual object imaging member 4 attached to the convergence angle reducing member 3, and a magnifying glass 5 fixed to the visual object imaging member 4. Here, the head belt section 2 corresponds to the head mounted section according to the present invention.

[0018] The magnifying glass 5 of this embodiment is a binocular type formed in a substantially rectangular plate shape, and a conventionally known configuration can be applied.

[0019] The connecting member 7 includes a base 11 fixed to the head belt portion 2, a movable portion 12 rotatably provided on the base 11, and an attachment portion 13 rotatably provided on the tip of the movable portion 12, and the convergence angle reducing member 3 is fixed to the attachment portion 13. The movable portion 12 is configured to be rotatably provided with a first piece (not shown) rotatably attached to the base 11 and a second piece (not shown) rotatably attached to the attachment portion 13. The connecting member 7 allows the convergence angle reducing member 3 to rotate in the vertical direction. In this embodiment, the convergence angle reducing member 3, the visual object imaging member 4, and the magnifying mirror 5 are integrally arranged, so that they can be integrally rotated in the vertical direction by the connecting member 7. In this embodiment, a light member 14 is arranged on the attachment portion 13. The light member 14 can illuminate an object that the wearer sees through the magnifying mirror 5, improving the visibility of the object. Incidentally, an ON / OFF switch, a power source, and the like (not shown) are connected to the light member 14 via cables.

[0020] In this way, the head mounted loupe 1 of this embodiment can convert the convergence angle reducing member 3, the visual object imaging member 4, and the magnifying glass 5 into a use position (FIG. 2(A)) in which they are placed in front of the wearer's eyes, and a standby position (FIG. 2(B)) in which they are tilted toward the use position, by the connecting member 7. Here, since the connecting member 7 is configured to be rotatable in the vertical direction via the first and second pieces as described above, the convergence angle reducing member 3 and the like can be placed in an appropriate use position according to the wearer.

[0021] Next, the main part of the present invention will be described. 3, the convergence angle reduction member 3 includes a housing 21 having a substantially rectangular parallelepiped shape that is long in the left-right direction, and first line of sight refraction members 22, 22 and second line of sight refraction members 24, 24 disposed inside the housing 21. The housing 21 includes connecting protrusions 26, 26 that are connected to the mounting portion 13 of the connecting member 7, and has a first front window portion 27 formed as an opening at the center of the front surface of the housing 21, and further has first rear window portions 28, 28 formed as openings near the left and right ends of the rear surface of the housing 21, respectively.

[0022] The first line of sight refraction members 22, 22 are approximately flat plates with one surface being a mirror surface, and each mirror surface is arranged symmetrically on the left and right in a position facing the first rear window portions 28, 28, respectively, with each mirror surface facing rearward and inclined inward and forward at a predetermined angle (see Figure 5).

[0023] The second line of sight refracting members 24, 24 are generally flat plates with one surface being a mirror surface, and are arranged symmetrically at positions facing the first front window portion 27 with each mirror surface facing forward and tilted inward and forward at a predetermined angle (see FIG. 5). In this embodiment, an integrated refracting member 23 is provided in which the left and right second line of sight refracting members 24, 24 are integrated into a generally V-shape in a plan view. In this integrated refracting member 23, the left second line of sight refracting member 24 and the first line of sight refracting member 22 near the left end of the housing 21 are arranged so that their mirror surfaces face each other, and the right second line of sight refracting member 24 and the first line of sight refracting member 22 near the right end of the housing 21 are arranged so that their mirror surfaces face each other.

[0024] In the convergence angle reduction member 3, the inclination angles of the first line of sight refracting members 22, 22 and the second line of sight refracting members 24, 24 (integral refracting member 23) are set so that the angle at which light refracted by the first line of sight refracting member 22 and the second line of sight refracting member 24 exits from the second line of sight refracting member 24 (angle with respect to the front-to-back direction) is smaller than the angle at which the light enters the first line of sight refracting member 22. As a result, the convergence angle θ by the left and right lines of sight S, S when looking through the left and right first rear window portions 28 of the convergence angle reduction member 3 is smaller than the convergence angle θ' by the left and right lines of sight S', S' when the convergence angle reduction member 3 is not used (see FIG. 6).

[0025] The convergence angle reducing member 3 in this embodiment corresponds to the convergence angle reducing means according to the present invention.

[0026] On the other hand, as shown in Fig. 3, the visual object imaging member 4 includes a housing 31 having a substantially rectangular parallelepiped shape elongated in the left-right direction, an optical axis refraction member 32 disposed inside the housing 31, and a camera member 33 disposed on the left side of the optical axis refraction member 32. A second rear window 38 having substantially the same shape as the first front window 27 is formed as an opening on the rear surface of the housing 31, and a second front window 37 is formed as an opening on the front surface at a position facing the second rear window 38. The optical axis refraction member 32 is disposed between the second front window 37 and the second rear window 38 (see Fig. 5).

[0027] As shown in FIG. 4, the optical axis refraction member 32 is formed by joining two cubic prisms 41 and 42 together with their side faces overlapping each other. Each cubic prism 41 and 42 is a cube formed by joining two right-angle prisms 43 and 43 together with their inclined faces 43a and 43a overlapping each other, and is a so-called cube-type beam splitter. Here, the optical axis refraction member 32 is formed by joining two cubic prisms 41 and 42 together symmetrically, and the inclined faces 43a and 43a of each cubic prism 41 and 42 are arranged so that they are inclined inward and forward. The right cubic prism 41 constituting the optical axis refraction member 32 has an anti-reflection coating applied to the front face 41a and the rear face 41b, and a black coating that suppresses the input and output of light is applied to the other four faces. The left cubic prism 42 has the anti-reflection coating applied to the front surface 42a, the rear surface 42b, and the left surface 42c, and the black coating applied to the other three surfaces. Furthermore, the slant surface 43a of each of the cubic prisms 41 and 42 is provided with a mirror coating (metal coating). In this embodiment, the mirror coating is applied so that the transmittance (transparency) of the slant surface 43a is 20 to 60%.

[0028] The camera member 33 is composed of a CCD camera, and is disposed on the left side of the optical axis refraction member 32 with the camera lens facing the left side surface 42c of the left cubic prism 42, as shown in FIG. 3. The camera member 33 is connected to a cable 34, as shown in FIG. 1, and is connected to a control device 35 via the cable 34. The cable 34 is extended from the left side of the camera member 33 to the left side and connected to the left side of the head belt portion 2. The cable 34 is connected to the control device 35 held by the wearer. The cable 34 transmits and receives a signal instructing the camera member 33 to capture an image and data captured by the camera member 33 between the camera member 33 and the control device 35, and supplies power from the control device 35 to the camera member 33. The control device 35 is equipped with a switch for causing the camera member 33 to capture an image, a power source, a wireless communication function, and the like, and can communicate data input from the camera member 33 via a network using the wireless communication function. This allows still images and videos captured by the camera member 33 to be transmitted via wireless communication and displayed on a monitor.

[0029] In such a visual object imaging member 4, incident light incident on the left cubic prism 42 of the optical axis refracting member 32 through the second front window portion 37 is divided into transmitted light that passes through the inclined surface 43a of the cubic prism 42 and reflected light that is reflected by the inclined surface 43a and passes through the left side surface 42c. As a result, the optical axis P of the camera member 33 coincides with the line of sight S that passes through the left cubic prism 42 in the front-rear direction (see FIG. 7). Here, the line of sight S is a line of sight refracted by the first line of sight refracting member 22 and the second line of sight refracting member 24 (integral type refracting member 23) of the convergence angle reducing member 3.

[0030] Similarly, the incident light incident on the right cubic prism 41 of the optical axis refracting member 32 through the second front window portion 37 is divided into transmitted light that passes through the inclined surface 43a of the cubic prism 42 and reflected light that is reflected by the inclined surface 43a. In this way, the optical axis refracting member 32 has the left and right cubic prisms 41, 42 symmetrically arranged, so that it is possible to suppress the wearer from feeling uncomfortable about the images reflected by the left and right eyes through the cubic prisms 41, 42.

[0031] The magnifying glass 5 is fixed to the front surface of the housing 31 of the visual object imaging member 4 so as to cover the second front window portion 37. Furthermore, the visual object imaging member 4 is fixed to the front surface of the convergence angle reducing member 3 so that the second rear window portion 38 and the first front window portion 27 of the convergence angle reducing member 3 overlap each other. In this way, the convergence angle reducing member 3, the visual object imaging member 4, and the magnifying glass 5 are integrated. Then, the convergence angle reducing member 3 is attached to the head belt portion 2 via the connecting member 7, and the head-mounted loupe 1 of this embodiment is formed.

[0032] In the head-mounted loupe 1 of this embodiment, the head belt part 2 is worn on the head of the wearer, and the convergence angle reducing member 3, the visual object imaging member 4, and the magnifying glass 5 are set in the use position (FIG. 2(A)), so that the wearer can magnify the object. As shown in FIG. 6(A) and FIG. 7, the left and right eyes of the wearer see the object 62 through the first line of sight refraction member 22 and the second line of sight refraction member 24 of the convergence angle reducing member 3, the optical axis refraction member 32 of the visual object imaging member 4, and the magnifying glass 5. That is, the lines of sight S, S of the left and right eyes are refracted by the first line of sight refraction member 22, 22 and the second line of sight refraction member 24, 24 of the integrated refraction member 23, respectively, pass through the cubic prisms 41, 42 of the optical axis refraction member 32, respectively, and reach the object 62 via the magnifying glass 5.

[0033] Here, as described above, the convergence angle reduction member 3 refracts the left and right lines of sight S, S with the first line of sight refraction member 22, 22 and the second line of sight refraction member 24, 24 (integral refraction member 23), so that the convergence angle θ of the lines of sight S, S becomes smaller than the convergence angle θ' (see FIG. 6(B)) of the lines of sight S', S' that do not pass through the convergence angle reduction member 3. As a result, for example, when viewing a deep portion (object) 62 of a deep hole 61, the head-mounted loupe 1 of this embodiment can be used to focus on the deep portion 62 as shown in FIG. 6(A), and the deep portion 62 can be viewed in a magnified manner through the magnifying glass 5. On the other hand, as shown in FIG. 6(B), when the conventional binocular loupe 101 is used, the left and right lines of sight S', S' pass through the loupe parts 102, 102 of the binocular loupe 101, so the convergence angle θ' of the lines of sight S', S' is larger than the convergence angle θ of the lines of sight S, S through the convergence angle reduction member 3 (FIG. 6(A)). Therefore, the conventional binocular loupe 101 cannot focus on the deep part 62 of the deep hole 61, and the deep part 62 cannot be viewed in an enlarged view. In this way, the head-mounted loupe 1 of this embodiment can reduce the convergence angle θ of the lines of sight S, S by the convergence angle reduction member 3, so that even the deep part (object) 62 of the deep hole 61, which cannot be focused on by the conventional binocular loupe 101, can be focused on and viewed in an enlarged view. Furthermore, this embodiment is provided with the light member 14 described above, and since the light member 14 can illuminate the inside of the deep hole 61, there is an advantage that the visibility of the deep portion 62 can be improved.

[0034] Furthermore, as shown in FIG. 7, the optical axis P of the camera member 33 of the visual object imaging member 4 is refracted by the inclined surface 43a of the optical axis refraction member 32 and coincides with the line of sight S of the wearer's left eye, and the optical axis P and the line of sight S reach the object through the magnifying glass 5. This allows the camera member 33 to capture still images and videos at the wearer's line of sight. Here, the optical axis P refracted by the optical axis refraction member 32 coincides with the line of sight S with the convergence angle θ reduced by the convergence angle reduction member 3, so that the camera member 33 can capture images at the same line of sight as the wearer even if it is in the deep part (object) 62 of the deep hole 61. Thus, by displaying the video or still images captured by the camera member 33 on a monitor, a person other than the wearer can view the object at the same line of sight as the wearer by viewing the monitor.

[0035] Therefore, as described above, the head-mounted loupe 1 of this embodiment makes it easy to focus on the deep part of a deep hole (or a hole with a small opening diameter), and allows the wearer to view the deep part (object) in a three-dimensional manner, since it can be magnified with both eyes. The camera member 33 can then capture an image of the deep part (object) at the wearer's line of sight. Naturally, even shallow holes and relatively widely exposed parts can be accurately and stably magnified, and the camera member 33 can capture an image at the wearer's line of sight.

[0036] In this way, the head mounted loupe 1 of this embodiment can capture still images and videos at the same eye level as the wearer, so that, for example, when used by a surgeon during surgery, assistants and visitors can see the state of the surgery at the same eye level as the surgeon. Therefore, during surgery, assistants and visitors can accurately know the state of the surgery, and can provide appropriate advice according to the state of the surgery. In addition, by viewing the recorded images after surgery, it is useful for accurately spreading knowledge about various surgical situations to students and other medical personnel.

[0037] The present invention is not limited to the above-described embodiment, and can be modified as appropriate within the scope of the present invention. For example, the dimensions and shapes of the various parts in the above-described embodiment can be changed as appropriate. In the above embodiment, the camera member 33 is disposed on the left side of the optical axis refracting member 32, but the present invention is not limited to this and it is also possible to dispose it on the right side. Furthermore, the camera member 33 may be disposed on both the left and right sides of the optical axis refracting member 32. In the above embodiment, the control device 35 is a device equipped with a power source and wireless functions, but it is not limited to this and may be a mobile terminal such as a smartphone or tablet. Such a mobile terminal can easily transmit and receive data captured by the camera member 33. [Explanation of symbols]

[0038] 1 Head-mounted magnifier 2 Head belt section 3. Convergence angle reduction member (convergence angle reduction means) 4 Visual imaging components 5. Magnifier 7 Connecting members 11 Base 12 Moving parts 13 Mounting part 21 Case 22 First line of sight refracting member 23 Integrated Refraction Element 24 Second line of sight refracting member 26 Connecting protrusion 27 First front window section 28 First rear window section 31 Case 32 Optical axis bending member 33 Camera parts 34 Cable 35 Control device 37 Second front window 38 Second rear window section 41,42 Cube Prism 41a,42a front 41b,42b rear 42c Left side 43 Right Angle Prism 43a Slope 61 Deep Hole 62 Deep (Object) 101 Binocular Magnifier 102 Magnifier part P optical axis S, S’ lines of sight θ, θ’ convergence angles

Claims

[Claim 1] A head-mounted part to be mounted on the head of a wearer as a surgeon; a magnifying glass attached to the head mounting unit and placed in front of the wearer's eyes when the head mounting unit is mounted on the wearer's head and in use; A head-mounted loupe for use in surgery that allows an object to be viewed in a magnified manner, comprising: A pair of first line of sight refracting members, one on each side, arranged behind the magnifying glass and in front of the left and right eyes of the wearer, respectively, for refracting the left and right lines of sight inward, a pair of left and right second line of sight refracting members respectively disposed between the left and right first line of sight refracting members behind the magnifying glass, and configured to refract the left and right lines of sight refracted by the first line of sight refracting members forward; and a convergence angle reduction member that reduces a convergence angle of left and right lines of sight via the first line of sight refracting member and the second line of sight refracting member compared to a convergence angle of left and right lines of sight not via the first line of sight refracting member and the second line of sight refracting member, the convergence angle reduction member comprises a housing having the first gaze refracting member and the second gaze refracting member, a first front window portion being opened and formed on a front surface of the housing, a first rear window portion being opened and formed on a rear surface of the housing, the first gaze refracting member being disposed at a position facing the first rear window portion, and the second gaze refracting member being disposed at a position facing the first front window portion, and a convergence angle by the left and right gazes when looking through the first rear window portion is smaller than a convergence angle by the left and right gazes when the convergence angle reduction member is not used, Furthermore, the convergence angle reducing member is attached to the head mounting part via a connecting member, and a visual object imaging member to which the magnifying glass is fixed is attached to the convergence angle reducing member so as to overlap the first front window portion of the convergence angle reducing member, The visual object imaging member is an optical axis refracting member disposed between the magnifying glass and the second line of sight refracting member; a camera member capable of capturing a still image or a video of the object through the optical axis refracting member, the optical axis refracting member passing a line of sight refracted by the second line of sight refracting member and passing through the first front window portion forward to allow the object to be viewed through the magnifying glass, and refracting the optical axis of the camera member to make the refracted optical axis coincide with one of the left and right lines of sight of the wearer, The optical axis refraction member is This head-mounted magnifying glass for use in surgery is characterized in that a cubic prism, which is formed by integrating two right-angle prisms by overlapping their inclined surfaces, is arranged symmetrically in front of left and right second line of sight refraction members, and the left and right lines of sight that are refracted by the left and right cubic prisms, respectively, and pass forward after passing through the first front window portion.

Images