Optical apparatus and adjustment method

Abstract

To provide an optical device in which the position of an optical unit can be easily adjusted.SOLUTION: An optical device (1) includes a ball-shaped lens (10), an optical unit (20), a base (30), and a lid (40), and the optical unit (20) includes a magnet (21), and the magnet (21) is attached to the base (30) so as to be able to rotate around the ball-shaped lens (10) depending on the magnetic force attracted thereto.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a technique for adjusting the position of an optical device.

Background Art

[0002] An optical device including a ball lens and an optical unit is used for an optical device that receives transmitted light, such as a laser application device, etc., which aims to perform laser communication between multiple devices.

[0003] Hereinafter, an example of a conventional optical device as described above will be described with reference to FIGS. 11 and 12. FIG. 11 is a side cross-sectional view showing an example of a conventional optical device 1X. FIG. 12 is a top view showing an example of the conventional optical device 1X. As shown in FIGS. 11 and 12, the optical device 1X includes a ball lens 10X, an optical unit 20X, and a base 30X to which the ball lens 10X and the optical unit 20X are attached. The optical device 1X has a mechanism in which the ball lens 10X receives and condenses transmitted light L from the outside, such as another device, and the optical unit 20X receives the condensed transmitted light L (FIGS. 11 and 12).

[0004] As such an optical device, Patent Document 1 describes a technique in which a beam splitter and a light receiving element for a received signal are provided on a pedestal, and laser light emitted from an optical fiber is transmitted through a ball lens, reflected by the beam splitter, and incident on the light receiving element for the received signal.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] Incidentally, since the direction of transmitted light changes depending on the position of the ball-shaped lens and other components in the optical device, it is necessary to be able to easily adjust the position of the optical unit to match this direction (Figure 12).

[0007] However, the technology described in Patent Document 1 has the problem that the position of the optical unit cannot be easily adjusted because the light-receiving element for receiving signals is attached to the base.

[0008] One aspect of the present invention has been made in view of the above-mentioned problems, and aims to provide an optical device and related technologies that allow for easy adjustment of the position of an optical unit. [Means for solving the problem]

[0009] An optical device according to one aspect of the present invention comprises a ball-shaped lens that receives and focuses transmitted light from an external source, one or more optical units that receive the focused transmitted light, a base to which the ball-shaped lens and the optical units are attached, and a lid that houses the ball-shaped lens and the optical units by engaging with the base, wherein the optical units are equipped with magnets and are attached to the base in such a way that they can rotate around the ball-shaped lens in accordance with the magnetic force that attracts the magnets.

[0010] An adjustment method according to one aspect of the present invention is an adjustment method for adjusting the position of one or more optical units provided in an optical device, wherein the optical device further comprises a ball-shaped lens that receives and focuses transmitted light from an external source, a base to which the ball-shaped lens and the optical unit are attached, and a lid that houses the ball-shaped lens and the optical unit by engaging with the base, wherein the optical unit receives the focused transmitted light, the optical unit is attached to the base so as to be able to rotate around the ball-shaped lens, the optical unit is equipped with a magnet, and the optical unit is rotated around the ball-shaped lens by attracting the magnet with magnetic force from the outside of the lid. [Effects of the Invention]

[0011] According to one aspect of the present invention, it is possible to provide an optical device and related technologies that allow for easy adjustment of the position of the optical unit. [Brief explanation of the drawing]

[0012] [Figure 1] This is a side cross-sectional view showing an example of an optical device according to exemplary embodiment 1 of the present invention. [Figure 2] This is a perspective view showing an example of an optical device according to Exemplary Embodiment 1 of the present invention. [Figure 3] This is a top view showing an example of an optical device according to exemplary embodiment 1 of the present invention. [Figure 4] This is a side cross-sectional view showing an example of an optical device according to exemplary embodiment 2 of the present invention. [Figure 5] This is a perspective view showing an example of an optical device according to exemplary embodiment 2 of the present invention. [Figure 6] This is a perspective view showing an example of an optical device according to exemplary embodiment 2 of the present invention. [Figure 7] This is a perspective view showing an example of an optical device according to exemplary embodiment 2 of the present invention. [Figure 8] This is a perspective view showing an example of an optical device according to exemplary embodiment 2 of the present invention. [Figure 9] This is a side cross-sectional enlargement view showing an example of an optical device according to exemplary embodiment 2 of the present invention. [Figure 10] This is a top view showing an example of an optical device according to exemplary embodiment 2 of the present invention. [Figure 11] This is a lateral cross-sectional view showing an example of a conventional optical device. [Figure 12] This is a top view showing an example of a conventional optical device. [Figure 13] This is a perspective view showing an example of a conventional optical device. [Figure 14] This is a perspective view showing an example of a conventional optical device. [Modes for carrying out the invention]

[0013] [Problems to be Solved by Exemplary Embodiments] Hereinafter, problems to be solved by exemplary embodiments will be described by taking, as an example, problems in adjusting the position of an optical unit 20X included in a conventional optical device 1X shown in FIGS. 13 and 14.

[0014] FIGS. 13 and 14 are perspective views showing an example of a conventional optical device 1X. In the example shown in FIGS. 13 and 14, the conventional optical device 1X includes a ball lens 10X, an optical unit 20X, a base 30X, a lid 40X, and fixing parts (fixing means) 100 and 110.

[0015] In the example shown in FIGS. 13 and 14, a groove 90X is formed in the base 30X around a portion to which the ball lens 10X is attached, and a contact part 22X that is a part of the optical unit 20X is inserted into the groove 90X. Thereby, the optical unit 20X is attached to the base 30X so as to be rotatable around the ball lens 10X along the groove 90X. The fixing parts 100 and 110 fix the position of the optical unit 20X. In the example shown in FIGS. 13 and 14, the fixing part 100 is a screw, and the fixing part 110 is a screw hole.

[0016] In the conventional optical device 1X, when adjusting the position of the optical unit 20X, first, the user of the optical device 1X removed the lid 40X from the state shown in FIG. 13 to the state shown in FIG. 14. Next, in the conventional optical device 1X, the user removed the screw 100 that fixes the optical unit 20X and adjusted the position of the optical unit 20X by rotating the optical unit 20X around the ball lens 10X. Also, in the conventional optical device 1X, after the position of the optical unit 20X was adjusted to a designated position that receives the transmitted light L received and condensed by the ball lens 10X, the user fixed the optical unit 20X at the designated position with the screw 100 and closed the lid 40X.

[0017] Thus, conventional optical devices 1X have a problem in that when adjusting the position of the optical unit 20X, the user cannot move the optical unit 20X without removing the cover 40X and the fixing parts 100 such as screws. Furthermore, since tools are required to adjust the position of the optical unit 20X, there is a problem in that work efficiency is reduced.

[0018] Furthermore, laser application equipment that uses optical devices such as optical device 1X is typically designed for outdoor use, and the position of the optical unit 20X is adjusted outdoors. Therefore, in order to reduce the effects of sand, dust, condensation, etc., it is necessary to maintain airtightness to prevent sand, dust, condensation, etc. from entering the optical device 1X, and the position adjustment and fixing of the optical unit 20X must be performed in a sealed state. However, a problem with this method of adjusting and fixing the position of the optical unit 20X in a sealed state is that the environment in which the position of the optical unit 20X can be adjusted is limited.

[0019] Furthermore, using moving parts such as motors to solve the above-mentioned problems results in a reduced lifespan for the optical device 1X.

[0020] Therefore, one problem that the exemplary embodiment aims to solve is to provide an optical device and related technology that allows for easy adjustment of the position of the optical unit. Another problem that the exemplary embodiment aims to solve is to provide an optical device and related technology that allows for adjustment of the position of the optical unit without removing fixing parts such as screws. Another problem that the exemplary embodiment aims to solve is to provide an optical device and related technology that does not require tools to adjust the position of the optical unit, thereby improving work efficiency. Furthermore, another problem that the exemplary embodiment aims to solve is to provide an optical device and related technology that allows for adjustment of the position of the optical unit without using movable parts such as motors, in order to extend the lifespan of the optical device.

[0021] [Exemplary Embodiment 1] Exemplary Embodiment 1 of the present invention will be described in detail with reference to the drawings. This exemplary embodiment is a basic form of the exemplary embodiments described later.

[0022] (Configuration of Optical Device 1) The configuration of the optical device 1 according to this exemplary embodiment will be described with reference to Figures 1 and 2. Figure 1 is a side cross-sectional view showing an example of the optical device 1. Figure 2 is a perspective view showing an example of the optical device 1. As shown in Figures 1 and 2, the optical device 1 comprises a ball-shaped lens 10, one or more optical units 20, a base 30, and a cover 40.

[0023] The ball-shaped lens 10 receives and focuses transmitted light from an external source. The optical unit 20 receives the focused transmitted light. The ball-shaped lens 10 and the optical unit 20 are mounted on the base 30. The cover 40 houses the ball-shaped lens 10 and the optical unit 20 by engaging with the base 30. The optical unit 20 is equipped with a magnet 21 and is mounted on the base 30 so as to be able to pivot around the ball-shaped lens 10 in accordance with the magnetic force that attracts the magnet 21.

[0024] (Adjustment method) A method for adjusting the position of one or more optical units 20 provided in the optical device 1 according to this exemplary embodiment will be described with reference to Figure 3. Figure 3 is a top view showing an example of the optical device 1.

[0025] In the adjustment method, the optical unit 20 is rotated around the ball-shaped lens 10 by attracting the magnet 21 from the outside of the lid 40 using magnetic force. As a result, the position of the optical unit 20X is adjusted so that it is at the designated position where the ball-shaped lens 10 receives and focuses the transmitted light L.

[0026] (Effects of Exemplary Embodiment 1) In this exemplary embodiment, the optical device 1 comprises a ball-shaped lens 10, one or more optical units 20, a base 30, and a cover 40, and the optical unit 20 is attached to the base 30 so as to be able to rotate around the ball-shaped lens 10 in accordance with the magnetic force that attracts the magnet 21.

[0027] With this configuration, the optical unit 20 can be rotated around the ball-shaped lens 10 and its position adjusted simply by attracting the magnet 21 from the outside of the lid 40 using magnetic force. Therefore, this exemplary embodiment provides an optical device 1 and related technologies that allow for easy adjustment of the position of the optical unit 20.

[0028] Furthermore, according to this exemplary embodiment, it is possible to provide an optical device 1 and related technologies that can improve work efficiency by not requiring tools to adjust the position of the optical unit 20. Furthermore, according to this exemplary embodiment, it is possible to provide an optical device 1α etc. that can adjust the position of the optical unit 20 while maintaining airtightness, regardless of the location, such as outdoors. Furthermore, according to this exemplary embodiment, it is possible to provide an optical device 1 etc. that can adjust the position of the optical unit 20 without removing fixing parts 100 such as screws. Furthermore, according to this exemplary embodiment, it is possible to provide an optical device 1 etc. that can adjust the position of the optical unit 20 without using movable parts such as motors, in order to extend the life of the optical device 1.

[0029] [Exemplary Embodiment 2] An exemplary embodiment 2 of the present invention will be described in detail with reference to the drawings. Components having the same function as those described in exemplary embodiment 1 are denoted by the same reference numerals, and their descriptions are omitted as appropriate.

[0030] (Configuration of optical device 1α) The configuration of the optical device 1α according to this exemplary embodiment will be described with reference to Figure 4. Figure 4 is a side cross-sectional view showing an example of the optical device 1α. In the example shown in Figure 4, the optical device 1α includes a base 30α instead of the base 30 in Embodiment 1, and further includes a fixing part (fixing means) 50 for fixing the position of the optical unit 20. Details of the base 30α and the fixing part 50 will be described later. As shown in Figure 4, the optical device 1α may further include a waterproof part (waterproofing means) 70 and an anti-slip part (anti-slip means) 80.

[0031] The waterproof part 70 is attached to the base 30α for waterproofing. Examples of the waterproof part 70 include an O-ring. The anti-slip part 80 fixes the position of the fixing part 50 from the base 30α side (bottom side) to prevent the fixing part 50 from slipping and rotating when closing or loosening the lid part 40. Examples of the anti-slip part 80 include a fixing pin.

[0032] (Assembling method) The assembly method of the optical device 1α according to this exemplary embodiment will be described with reference to Figures 5 to 8. Figures 5 to 8 are perspective views showing an example of the optical device 1α. In the example shown in Figure 5, a groove 90 is formed around the portion to which the ball-shaped lens 10 is attached in the base portion 30α, and a screw-type engaging portion 31 is formed which engages with the cover portion 40.

[0033] First, the user of the optical device 1α installs the optical units 20 on the base 30α such that a contact portion 22, which is part of one or more optical units 20, is inserted into the groove 90. In the example shown in Figure 5, the user attaches four optical units 20 to the groove 90 of the base 30α so that they can independently rotate around the ball-shaped lens 10. Thus, there may be multiple optical units 20, and they may be attached to the base 30α so that they can independently rotate around the ball-shaped lens 10.

[0034] Next, the user attaches the fixing part 50 to the outside of the groove 90 from the upper side of the base 30α (Figures 5 and 6). In the example shown in Figure 6, the fixing part 50 is a fixing ring. Thus, the fixing part 50 may be a ring-shaped member.

[0035] Next, the user attaches the lid 40 to the base 30α (Figures 7 and 8). In the example shown in Figure 7, a screw-type engaging portion 31 that engages with the lid 40 is provided on the base 30α, and a screw-type engaging portion 41 that engages with the base 30α is provided on the lid 40. In this case, as shown in Figure 8, the user screws the lid 40 onto the base 30α while rotating it clockwise in the direction of the arrow, thereby closing the lid 40 and engaging it with the base 30α.

[0036] Thus, the fixing part 50 may be pressed from the lid part 40 when the lid part 40 engages with the base part 30α, and this pressing presses the optical unit 20, thereby fixing the position of the optical unit 20. The fixing of the position of the optical unit 20 by the fixing part 50 will be explained below with reference to Figure 9. Figure 9 is an enlarged lateral cross-sectional view showing an example of a region R including the fixing part 50 in the optical device 1α.

[0037] As shown in Figure 9, for example, the fixing portion 50 may be pressed against the upper surface of the fixing portion 50 by the lid portion 40 engaging with the base portion 30α. Accordingly, at least a part of the fixing portion 50 may contact the inclined surface S of the optical unit 20 on the opposite side of the ball-shaped lens 10, pressing the optical unit 20 toward the base portion 30α. In this case, a force is applied to the fixing portion 50 in the direction of the arrow shown in the fixed state diagram of Figure 9. This generates a force toward the base portion 30α side (inward) of the optical unit 20, pressing the contact portion 22 against the inner wall W of the groove portion 90, thereby fixing the position of the optical unit 20.

[0038] (Adjustment method) A method for adjusting the optical device 1α according to this exemplary embodiment will be described with reference to Figures 4 and 8-10. Figure 10 is a top view showing an example of the optical device 1α.

[0039] First, the user of the optical device 1α loosens the cover 40. In the example shown in Figure 8, the cover 40 is engaged with the base 30α by screw-type engaging parts 31 and 41, so the user loosens the cover 40 by turning it counterclockwise in the opposite direction to the arrow in Figure 8.

[0040] As a result, as shown in the diagram of the loosened state in Figure 9, the lid 40 moves upward in the direction of the arrow in the loosened state diagram in Figure 9, creating a first gap G1 between the lid 40 and the fixing part 50, and the fixing part 50 is released from the pressure from the lid 40 and moves upward. As a result, a second gap G2 is created between the fixing part 50 and the optical unit 20, the pressure and fixing of the optical unit 20 by the fixing part 50 is released, and the optical unit 20 becomes rotatable.

[0041] Next, the user of the optical device 1α attracts the magnet 21 by magnetic force from the outside of the lid 40. For example, as shown in Figure 4, the user brings the magnet 23 for positioning the optical unit 20 closer to the magnet 21 from the outside of the lid 40. As shown in Figure 10, if there are multiple optical units 20, the user may bring the magnet 23 closer to the magnet 21 located on the back of the optical unit 20 closest to the transmitted light L from the outside. The polarity of magnets 21 and 23 is not particularly limited as long as they are polarities that attract each other. For example, magnet 21 may be north pole and magnet 23 may be south pole, or magnet 21 may be south pole and magnet 23 may be north pole. The magnetic force of magnets 21 and 23 should be strong enough to attract each other through the lid 40.

[0042] Next, when the user of the optical device 1α rotates the magnet 23 in the direction of the arrow in Figure 10, the optical unit 20 rotates along the groove 90 around the ball-shaped lens 10 in the direction of the arrow in Figure 10, in accordance with the magnetic force that attracts the magnet 21 to the magnet 23, and its position is adjusted.

[0043] After adjusting the position of the optical unit 20, when the user closes the lid 40, the position of the optical unit 20 is fixed to the adjusted position by the fixing part 50, similar to the assembly method described above (Figure 5).

[0044] (Effects of Exemplary Embodiment 2) In this exemplary embodiment, a groove 90 is formed in the base 30α around the portion to which the ball-shaped lens 10 is attached, and a contact portion 22, which is part of the optical unit 20, is inserted into the groove 90, so that the optical unit 20 can pivot around the ball-shaped lens 10 along the groove 90.

[0045] With this configuration, the optical unit 20 rotates around the ball-shaped lens 10 along the groove 90 simply by attracting the magnet 21 from outside the part 40 by magnetic force. Therefore, according to this exemplary embodiment, in addition to the effects of exemplary embodiment 1, it is possible to provide an optical device 1 and related technologies in which the position of the optical unit 20 can be adjusted more easily.

[0046] In this exemplary embodiment, the optical device 1α is configured to further include a fixing portion 50 which, when the lid portion 40 engages with the base portion 30α, is pressed from the lid portion 40, and this pressing presses the optical unit 20, thereby fixing the position of the optical unit 20.

[0047] With this configuration, the user can fix the position of the optical unit 20 simply by closing the loosened lid 40 without removing the lid 40. Therefore, according to this exemplary embodiment, in addition to the effects of exemplary embodiment 1, it is possible to provide an optical device 1α, etc., that can fix the position of the optical unit 20 while maintaining airtightness, regardless of the location, such as outdoors.

[0048] In this exemplary embodiment, the fixing portion 50 is configured such that at least a part of the fixing portion 50 abuts against the inclined surface S of the optical unit 20 on the opposite side of the ball-shaped lens 10, thereby pressing the optical unit 20 toward the base portion 30α.

[0049] With this configuration, when the lid 40 is closed, the fixing part 50 presses against the optical unit 20, and when the lid 40 is loosened, the fixing part 50 is released from the pressure of the lid 40. As a result of this release, the optical unit 20 is released from the pressure of the fixing part 50 and becomes rotatable. Therefore, according to this exemplary embodiment, in addition to the effects of exemplary embodiment 1, it is possible to provide an optical device 1α and related technologies that can fix and release the position of the optical unit 20 while maintaining airtightness simply by closing or loosening the lid 40.

[0050] In this exemplary embodiment, the fixing portion 50 is configured as a ring-shaped member.

[0051] With this configuration, at least a portion of the fixing portion 50 abuts against the inclined surface S of the optical unit 20 on the opposite side of the ball-shaped lens 10, and presses the optical unit 20 toward the base portion 30α. A ring-shaped member can be used as a suitable member for the fixing portion 50. Therefore, according to this exemplary embodiment, in addition to the effects of exemplary embodiment 1, the effect of being able to use a member suitable for the fixing portion 50 as described above can be obtained.

[0052] In this exemplary embodiment, there are multiple optical units 20, and they are mounted on the base 30α so that they can independently rotate around the ball-shaped lens 10.

[0053] This configuration allows the position of the optical unit 20 closest to the externally transmitted light L to be adjusted. Therefore, in addition to the effects of the exemplary embodiment 1, this exemplary embodiment provides the effect of being able to adjust the position of the optical unit 20 more easily.

[0054] (Modified example of the fixing part 50) In the example described above, a fixing ring is used for the fixing part 50, which at least a portion of which contacts the inclined surface S of the optical unit 20 on the opposite side of the ball-shaped lens 10 and presses the optical unit 20 toward the base 30α. However, in this embodiment, the fixing part 50 having such a function is not limited to a fixing ring, and any member having such a function may be used. This also provides the same effect as when the fixing part 50 is a fixing ring.

[0055] (Modified example of the anti-slip part 80) In the example described above, a fixing pin is used for the anti-slip part 80 that fixes the position of the fixing part 50 from the base 30α side (bottom side) in order to prevent the fixing part 50 from slipping and rotating when closing or loosening the lid part 40. However, in this embodiment, the anti-slip part 80 having such a function is not limited to a fixing pin, and any anti-slip part 80 having such a function, such as a screw, can be used. If the anti-slip part 80 has such a function, the same effect as when the anti-slip part 80 is a fixing pin can be obtained.

[0056] [Additional Note 1] The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. For example, embodiments obtained by appropriately combining the technical means disclosed in the embodiments described above are also included in the technical scope of the present invention.

[0057] [Additional Note 2] Some or all of the embodiments described above may also be described as follows. However, the present invention is not limited to the embodiments described below.

[0058] (Note 1) A ball-shaped lens that receives and focuses light transmitted from an external source, One or more optical units receive the focused transmitted light, The ball-shaped lens and the optical unit are attached to a base, The lid portion, which engages with the base portion, houses the ball-shaped lens and the optical unit. The optical device comprises an optical unit equipped with a magnet, which is mounted on the base such that it can rotate around the ball-shaped lens in accordance with the magnetic force to which the magnet is attracted.

[0059] (Note 2) The base has a groove formed around the portion to which the ball-shaped lens is attached. A part of the optical unit is inserted into the groove, The optical device as described in Appendix 1, wherein the optical unit is capable of rotatably rotating around the ball-shaped lens along the groove.

[0060] (Note 3) The optical device according to Appendix 1 or 2, further comprising a fixing means which, when the lid engages with the base, is pressed from the lid, and by pressing the optical unit as a result of said pressing, fixes the position of the optical unit.

[0061] (Note 4) The optical apparatus as described in Appendix 3, wherein at least a portion of the fixing means abuts against the inclined surface of the optical unit opposite to the ball-shaped lens, and presses the optical unit toward the base.

[0062] (Note 5) The optical device according to Appendix 3 or 4, wherein the fixing means is a ring-shaped member.

[0063] (Note 6) The optical apparatus according to any one of the appendices 1 to 5, wherein the number of optical units is multiple and they are attached to the base so as to be able to rotate independently around the ball-shaped lens.

[0064] (Note 7) An adjustment method for adjusting the position of one or more optical units in an optical device, The optical device is A ball-shaped lens that receives and focuses light transmitted from an external source, The ball-shaped lens and the optical unit are attached to a base, The lid portion, which engages with the base portion, further comprises a lid portion that houses the ball-shaped lens and the optical unit, The optical unit receives the focused transmitted light, The optical unit is mounted on the base so as to be able to rotate around the ball-shaped lens. The optical unit is equipped with a magnet, An adjustment method comprising using magnetic force to attract the magnet from the outside of the cover, thereby causing the optical unit to rotate around the ball-shaped lens. [Explanation of Symbols]

[0065] 1, 1α, 1X optics 10, 10X ball-shaped lens 20, 20X Optical Unit 21, 23 Magnets 30, 30α, 30X base 40, 40X Lid 50, 100, 110 Fixed part (fixing means) 90, 90X groove

Claims

1. A ball-shaped lens that receives and focuses light transmitted from an external source, One or more optical units that receive the focused transmitted light, The ball-shaped lens and the optical unit are attached to a base, The lid portion, which engages with the base portion, houses the ball-shaped lens and the optical unit. The optical device comprises an optical unit equipped with a magnet, which is mounted on the base such that it can rotate around the ball-shaped lens in accordance with the magnetic force to which the magnet is attracted.

2. The base has a groove formed around the portion to which the ball-shaped lens is attached. A part of the optical unit is inserted into the groove, The optical device according to claim 1, wherein the optical unit is capable of rotatably moving around the ball-shaped lens along the groove.

3. The optical device according to claim 2, further comprising a fixing means which, when the lid engages with the base, is pressed from the lid, and by pressing the optical unit in conjunction with this pressing, fixes the position of the optical unit.

4. The optical apparatus according to claim 3, wherein at least a portion of the fixing means abuts against the inclined surface of the optical unit opposite to the ball-shaped lens, and presses the optical unit toward the base.

5. The optical device according to claim 4, wherein the fixing means is a ring-shaped member.

6. The optical apparatus according to any one of claims 1 to 5, wherein the number of optical units is multiple and they are attached to the base so that they can independently rotate around the ball-shaped lens.

7. An adjustment method for adjusting the position of one or more optical units in an optical device, The optical device is A ball-shaped lens that receives and focuses light transmitted from an external source, The ball-shaped lens and the optical unit are attached to a base, The lid portion, which engages with the base portion, further comprises a lid portion that houses the ball-shaped lens and the optical unit, The optical unit receives the focused transmitted light, The optical unit is mounted on the base so as to be able to rotate around the ball-shaped lens. The optical unit is equipped with a magnet, An adjustment method comprising rotating the optical unit around the ball-shaped lens by attracting the magnet from the outside of the cover using magnetic force.

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