JP5903767B2 - Lens barrel - Google Patents

Description

  The present invention relates to a support shaft and a method for manufacturing a lens barrel.

There is a method in which a reference axis having a reflecting surface is inserted into a bearing, and the bearing axis is measured by reflected light from the reflecting surface (see Patent Document 1).
Patent Document 1 Japanese Patent Application Laid-Open No. 2003-166906

  Since the reference shaft is temporarily inserted and pulled out after measuring the shaft, there is an inevitable “back” for the bearing. Due to this “gata”, the measurement accuracy of the shaft is inevitably lowered.

The lens barrel is provided so as to extend in the optical axis direction of the lens, a support shaft having a mirror surface formed on an end surface on one end side, a first fixing portion that holds the other end side of the support shaft, A holding hole penetrating in the optical axis direction, holding the one end side of the support shaft in a state of being inserted into the holding hole, and the one end side with respect to the other end side held by the first fixing portion The second fixing portion capable of adjusting the position in the direction orthogonal to the optical axis, and a lens holding member that holds the lens and is supported by the support shaft .

1 is a schematic cross-sectional view of an imaging apparatus 100. FIG. 2 is a partial cross-sectional view of a lens unit 200. FIG. It is a perspective view explaining the inclination adjustment of the support shaft 270. It is a perspective view explaining the inclination adjustment of the support shaft 270. It is a fragmentary sectional view explaining the usage method of the mirror surface 272. FIG. It is a perspective view explaining the inclination adjustment of the support shaft 270. 2 is a partial cross-sectional view of a lens unit 200. FIG. It is a perspective view explaining the inclination adjustment of the support shaft. It is a perspective view explaining the inclination adjustment of the support shaft. 3 is a perspective view of a fixing member 281. FIG. 3 is a front view of a fixing member 281. FIG. 4 is a rear view of the fixing member 281. FIG. 3 is a cross-sectional view of a fixing member 281. FIG. It is sectional drawing of the other fixing member 289. FIG. It is a perspective view explaining fixation of the support shaft 271. FIG.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

  FIG. 1 is a schematic cross-sectional view of the imaging apparatus 100. The imaging device 100 includes a lens unit 200 and a camera body 300.

  In the following description, in the lens unit 200, the object side is described as “front” and the image side is described as “rear”. In the camera body 300, the side on which the lens unit 200 is mounted is referred to as “front”, and the side on the opposite side where the finder 350, the display unit 340, and the like are disposed is referred to as “rear” or “back”.

  The lens unit 200 includes a fixed barrel 210, a lens barrel CPU 219, a plurality of lenses 220, 230, 240, 250, and a lens mount 260. One end of the fixed barrel 210 is coupled to the body mount 360 of the camera body 300 via the lens mount 260. The plurality of lenses 220, 230, 240, 250 are arranged on a common optical axis X to form an optical system.

  The lens barrel CPU 219 controls the lens unit 200 and also communicates with the camera body 300. Accordingly, the lens unit 200 attached to the camera body 300 operates in cooperation with the camera body 300. In the lens unit 200 including the vibration isolation unit, the lens barrel CPU 219 calculates the movement direction and movement amount of the lens that cancels the vibration, and controls the vibration isolation actuator.

  The coupling between the lens mount 260 and the body mount 360 can be released. As a result, another lens unit 200 having a lens mount 260 of the same standard can be attached to the camera body 300.

  The camera body 300 includes a mirror unit 370 disposed behind the body mount 360 with respect to the lens unit 200. A focusing optical system 380 is disposed below the mirror unit 370. Further, a focusing screen 352 is disposed above the mirror unit 370.

  A pentaprism 354 is disposed further above the focusing screen 352, and a finder optical system 356 is disposed behind the pentaprism 354. The rear end of the viewfinder optical system 356 is exposed as a viewfinder 350 on the back surface of the camera body 300.

  Behind the mirror unit 370, a shutter device 400, a low-pass filter 332, an image sensor 330, a main substrate 320, and a display unit 340 are sequentially arranged. A display unit 340 formed by a liquid crystal display panel or the like appears on the back surface of the camera body 300. A part of electronic components such as the main body CPU 322 and the image processing circuit 324 is mounted on the main board 320.

  The mirror unit 370 includes a main mirror 371 and a sub mirror 374. The main mirror 371 is supported by a main mirror holding frame 372 that is pivotally supported by a main mirror rotating shaft 373. The sub mirror 374 is supported by a sub mirror holding frame 375 supported by a sub mirror rotating shaft 376. The sub mirror holding frame 375 rotates with respect to the main mirror holding frame 372. Therefore, when the main mirror holding frame 372 rotates, the sub mirror holding frame 375 is also displaced together with the main mirror holding frame 372.

  When the front end of the main mirror holding frame 372 is lowered, the main mirror 371 is positioned obliquely on the incident light beam incident from the lens unit 200. When the main mirror holding frame 372 rises, the main mirror 371 retracts to a position that avoids the incident light beam.

  When the main mirror 371 is positioned on the incident light beam, the incident light beam incident through the lens unit 200 is reflected by the main mirror 371 and guided to the focusing screen 352. Since the focusing screen 352 is disposed at a position conjugate with the optical system of the lens unit 200, a subject image formed by the optical system is connected.

  The image formed on the focusing screen 352 is observed from the viewfinder 350 through the pentaprism 354 and the viewfinder optical system 356. Since the luminous flux of the subject image passes through the pentaprism 354, the subject image on the focusing screen 352 is observed as an erect image from the viewfinder 350.

  The photometric sensor 390 is disposed above the finder optical system 356 and receives a part of the incident light beam branched by the pentaprism 354. The photometric sensor 390 detects the subject brightness and causes the main body CPU 322 to calculate an exposure condition which is a part of the photographing condition. In addition, a part of the incident light beam is measured for each of the three primary colors to be used for calculating the auto white balance.

  The main mirror 371 has a half mirror region that transmits a part of the incident incident light beam. The sub mirror 374 reflects a part of the incident light beam incident from the half mirror region toward the focusing optical system 380. The focusing optical system 380 guides a part of the incident incident light beam to the focus detection sensor 382. Accordingly, the main body CPU 322 determines a target position of the lens 230 when the optical system of the lens unit 200 is focused.

  When the release button is half-pressed in the imaging apparatus 100 as described above, the focus detection sensor 382 and the photometric sensor 390 are enabled, and the subject image can be captured under appropriate imaging conditions. Next, when the release button is fully pressed, the main mirror 371 and the sub mirror 374 move to the retracted position, and the shutter device 400 opens. Thereby, the incident light beam incident from the lens unit 200 passes through the low-pass filter 332 and enters the image sensor 330.

  The image sensor 330 is formed by a photoelectric conversion element such as a CCD sensor (Charge Coupled Device) or a CMOS sensor (Complementary Metal Oxide Semiconductor), and converts the received subject image into an electrical signal and outputs the electrical signal. The electrical signal output from the image sensor 330 is converted into captured image data by the image processing circuit 324.

  FIG. 2 is a cross-sectional view showing a part of the lens unit 200 extracted. Elements that are the same as those in FIG. 1 are given the same reference numerals, and redundant descriptions are omitted.

  The lens unit 200 has a pair of support shafts 270 parallel to the optical axis X inside the fixed cylinder 210. Both ends of the support shaft 270 are fixed to the fixed cylinder 210, respectively.

  That is, the front end of the support shaft 270 is inserted into the fixing hole 214 of the rib portion 212 formed inside the fixed cylinder 210 in the middle of the fixed cylinder 210 in the longitudinal direction. The rear end of the support shaft 270 is held in the holding hole 282 of the fixing member 280 fixed to the rear end (right side in the drawing) of the fixed cylinder 210.

  The holding hole 282 penetrates the fixing member 280 in the front-rear direction of the lens unit 200. Therefore, when viewed from the rear end side of the fixed cylinder 210, the end surface of the support shaft 270 can be seen inside the holding hole 282. The end surface of the support shaft 270 that appears inside the holding hole 282 forms a mirror surface 272 that reflects light.

  The support shaft 270 is fixed to the fixed cylinder 210 in a state parallel to the optical axis X. The support shaft 270 is inserted through the fitting portion 254 and the engaging portion 256 of the lens holding frame 252 that holds the lens 250. Accordingly, the lens 250 moves in a direction parallel to the optical axis X together with the lens holding frame 252 guided by the support shaft 270.

  In the lens unit 200, the lenses 220, 230, 240, and 250 are arranged on the optical axis X to form an optical system. When the lens 250 moves in the optical axis X direction in this optical system, for example, the focal position or magnification of the optical system changes.

  In the lens unit 200 as described above, each of the pair of support shafts 270 is fixed in parallel to the optical axis X. Therefore, when the support shaft 270 is fixed to the fixed cylinder 210, the inclination of the support shaft 270 is adjusted.

  In the lens unit 200, the lens holding frame 222 that holds the lens 220 is fixed to the tip of the fixed cylinder 210 by a set screw 291 screwed into the screw hole 217. In the lens unit 200, the lens 230 held by the lens holding frame 232 is also supported so as to be movable in the direction of the optical axis X. This will be described with reference to other drawings.

  FIGS. 3 to 6 are perspective views for explaining the tilt adjustment when the support shaft 270 is fixed to the fixed cylinder 210. In these drawings, the same elements as those in FIGS. 1 and 2 are denoted by the same reference numerals, and redundant description is omitted.

  In the stage shown in FIG. 3, the tip of the support shaft 270 inserted from the rear end side of the fixed cylinder 210 is inserted into the fixing hole 214 of the rib portion 212. As a result, one end of the support shaft 270 on the front end side is fixed to the fixed cylinder 210.

  As already described, the rear end side end surface of the support shaft 270 forms a mirror surface 272. The mirror surface 272 is formed perpendicular to the longitudinal direction of the support shaft 270. Such a support shaft 270 can be made of, for example, stainless steel, engineering plastic, or the like.

  Further, the mirror surface 272 can be formed by electrochemical surface treatment such as electrolytic polishing and chemical polishing in addition to mechanical processing such as buffing and precision grinding. Further, when the material of the support shaft 270 is resin or the like, the mirror surface 272 may be formed by plating or the like.

  As shown in the drawing, a pair of screw holes 216 are formed on the rear end surface of the fixed cylinder 210 with the rear end of the support shaft 270 interposed therebetween. In addition, a notch 218 is formed between the support shaft 270 and one screw hole 216 by removing a part of the fixed cylinder 210. The notch 218 is formed for the purpose of avoiding interference with a tool that moves the support shaft 270 when the rear end of the support shaft 270 is moved to adjust the inclination.

  In the stage shown in FIG. 4, the fixing member 280 is attached to the rear end of the support shaft 270. The fixing member 280 has a holding hole 282, a hexagonal hole 284, and an insertion hole 286.

  The holding hole 282 has the same inner diameter as the outer diameter of the support shaft 270. When the rear end of the support shaft 270 is inserted into the holding hole 282, the inner surface of the holding hole 282 and the outer peripheral surface of the support shaft 270 are in close contact with each other. As a result, the fixing member 280 is integrated with the rear end of the support shaft 270.

  Further, the holding hole 282 penetrates the fixing member 280 in the thickness direction. Therefore, the mirror surface formed on the end surface of the support shaft 270 is exposed inside the holding hole 282. Therefore, the mirror surface 272 can be irradiated with a light beam from the outside of the fixed cylinder 210 through the holding hole 282.

  The hexagonal hole 284 has a regular hexagonal shape. Therefore, when an Allen key having a size equal to the inner diameter of the hexagonal hole 284 is inserted into the hexagonal hole 284, the fixing member 280 can be moved without rotating by operating the Allen key. A notch 218 is disposed on the back side of the hexagon hole 284 on the fixed cylinder 210 side. Therefore, the tip of the tool inserted into the hexagonal hole 284 does not interfere with the fixed cylinder 210.

  FIG. 5 is a partial cross-sectional view for explaining how to use the mirror surface 272 of the support shaft 270. As shown in FIG. 4, at this stage, the front end side of the support shaft 270 is fixed to the fixed cylinder 210, and the fixing member 280 is attached to the rear end side. Further, the fixing member 280 is not yet fixed to the fixed cylinder 210.

  In the above state, the mirror surface 272 of the support shaft 270 is irradiated with the light beam emitted from the autocollimator 199. The autocollimator 199 irradiates the mirror surface 272 with a light beam, receives the reflected beam reflected by the mirror surface 272, and detects the inclination of the mirror surface 272 based on the deviation of the optical path between the light beam and the reflected beam.

  As already described, the mirror surface 272 is formed perpendicular to the longitudinal direction of the support shaft 270. Therefore, by measuring the inclination of the mirror surface 272 with the autocollimator 199, the inclination of the support shaft 270 can be accurately detected.

  The mirror surface 272 is a part of the support shaft 270, and the positional relationship with respect to the entire support shaft 270 does not change. Therefore, by monitoring the output of the autocollimator 199 and inserting the tool into the hexagon hole 284 of the fixing member 280 to displace the fixing member 280, the support shaft 270 is made parallel to the optical axis X with high accuracy. Can do.

  In view of the function of the autocollimator 199 as described above, the mirror surface 272 has at least a surface property that efficiently reflects the light beam emitted from the autocollimator 199. In other words, since light in other bands may not be reflected, mirror finishing may be simplified according to the specifications of the autocollimator 199 to be used.

  FIG. 6 is a perspective view for explaining the next stage in adjusting the inclination of the support shaft 270. As described above, the inclination of the support shaft 270 is adjusted to make the support shaft 270 and the optical axis X parallel to each other, and then the fixing member 280 is fixed to the fixed cylinder 210 with the set screw 290.

  Thereby, the fixing member 280 is fixed to the fixed cylinder 210, and the adjusted inclination of the support shaft 270 is maintained. The fixing of the fixing member 280 is not limited to screwing, but may be adhesion, welding, or the like.

  The fixing member 280 is provided with an insertion hole 286 through which the set screw 290 is inserted. The insertion hole 286 has an inner diameter larger than the outer diameter of the set screw 290. Therefore, if the set screw 290 is not tightened, the fixing member 280 can be displaced even when the set screw 290 is passed through the insertion hole 286 and screwed into the screw hole 216 to some extent. By adjusting the inclination of the support shaft 270 in this state, the adjustment result can be maintained with a slight rotation of the set screw 290.

  A series of inclination adjustments as described above are executed for each of the pair of support shafts 270. Accordingly, each of the pair of support shafts 270 is parallel to the optical axis X, and the pair of support shafts 270 are parallel to each other.

  FIG. 7 is a cross-sectional view of the lens unit 200, and shows a cross section different from FIG. Elements common to those in FIGS. 1 and 2 are denoted by the same reference numerals, and redundant description is omitted.

  The lens unit 200 also includes a pair of support shafts 271 parallel to the optical axis X on the front end side of the fixed cylinder 210. Both ends of the support shaft 271 are fixed to the fixed cylinder 210, respectively. The support shaft 271 is disposed at a different position in the circumferential direction of the fixed cylinder 210 with respect to the support shaft 270 shown in FIG. Therefore, the support shaft 270 does not appear in FIG.

  One end of the rear side of the support shaft 271 is inserted into the fixing hole 213 of the rib portion 212 formed in the fixed cylinder 210. The other end of the support shaft 271 corresponding to the front end side of the lens unit 200 is held by a fixing member 281 disposed on the front end side (left side in the drawing) of the fixed cylinder 210. The fixing member 281 is supported by the lens holding frame 222 fixed to the front end surface of the fixed cylinder 210.

  Each of the support shafts 271 is arranged in parallel with the optical axis X. The support shaft 271 is inserted through the fitting portion 234 and the engaging portion 236 of the lens holding frame 232 that holds the lens 230. Accordingly, the lens 230 moves in a direction parallel to the optical axis X inside the fixed cylinder 210 together with the lens holding frame 232 guided by the support shaft 271. In this optical system, when the lens 230 moves in the optical axis X direction, for example, the focal position or magnification of the optical system changes.

  In the lens unit 200 as described above, each of the pair of support shafts 271 is fixed parallel to the optical axis X. Therefore, when the support shaft 271 is fixed to the fixed cylinder 210, the inclination of the support shaft 271 is adjusted.

  7 shows that the fixing member 280 that fixes the support shaft 270 described above is screwed to the fixing cylinder 210. FIG. A set screw 290 for fixing the fixing member 280 is inserted into the insertion hole 286 of the fixing member 280 and screwed into the screw hole 216 of the fixing cylinder 210. Thereby, the fixing member 280 is fixed to the end surface of the fixed cylinder 210.

  8 and 9 are perspective views for explaining the tilt adjustment of the support shaft 271. FIG. In these drawings, the same reference numerals are assigned to the same elements as those in FIGS. 1, 2, and 7, and duplicate descriptions are omitted.

  In the stage shown in FIG. 8, the tip of the support shaft 271 inserted from the rear end side of the fixed cylinder 210 is inserted into the fixing hole 213 of the rib portion 212. As a result, one end on the rear end side of the support shaft 271 is fixed to the fixed cylinder 210.

  The end surface on the front end side of the support shaft 271 forms a mirror surface 273. The mirror surface 273 is formed perpendicular to the longitudinal direction of the support shaft 271. Further, the mirror surface 273 has a high reflectance with respect to light in a wide band due to polishing or the like.

  FIG. 9 is a perspective view for explaining the next stage in adjusting the inclination of the support shaft 271. After the rear end side end of the support shaft 271 is fixed to the fixed cylinder 210, the lens holding frame 222 of the lens 220 is fixed to the front end surface of the fixed cylinder 210. The lens holding frame 222 is screwed to the front end surface of the fixed barrel 210 by screwing the set screw 291 shown in FIG. 2 into the screw hole 217 of the fixed barrel 210.

  Further, a fixing member 281 is disposed in the vicinity of the peripheral edge in the radial direction of the lens holding frame 222. The fixing member 281 that looks circular on the end surface of the fixing cylinder 210 has a through hole 283 at the center. Further, a slit 285 is formed on the end surface of the fixing member 281 in the diameter direction of the fixing member 281. Note that the fixing member 281 is only fitted into the lens holding frame 222 and can be rotated with respect to the lens holding frame 222.

  FIG. 10 is a perspective view of the fixing member 281 alone. The fixing member 281 has a cylindrical shape as a whole, and has a through hole 283 that passes through the center. In addition, a groove-shaped slot 285 is formed on the end surface that is visible from the outside of the fixed cylinder 210 when attached to the lens holding frame 222 shown in FIG.

  FIG. 11 is a front view showing the fixing member 281 as viewed from the front end side of the fixed cylinder 210. As illustrated, in the fixing member 281, the through hole 283 is formed coaxially with the center of the fixing member 281 itself.

  On the other hand, the slit 285 is formed on the diameter passing through the center P at the end face of the fixing member 281. Therefore, a tool such as a flat-blade screwdriver can be inserted into the slot 285 and the fixing member 281 can be rotated around the center P.

  FIG. 12 is a rear view of the fixing member 281. When the fixing member 281 is attached to the lens holding frame 222, an eccentric hole 287 is formed on the end surface that faces the inner side of the fixed cylinder 210. The eccentric hole 287 is a cylindrical depression, and has a center Q at a different position with respect to the center P of the fixing member 281 itself. The eccentric hole 287 has the same inner diameter as the outer diameter of the support shaft 271.

  FIG. 13 is a cross-sectional view of the fixing member 281 passing through the center P. As illustrated, the eccentric hole 287 does not penetrate the fixing member 281 in the longitudinal direction, and has a bottom surface inside the fixing member 281. However, the eccentric hole 287 communicates with the through hole 283.

  Referring again to FIG. 9, the front end of the support shaft 271 is inserted into the eccentric hole 287 of the fixing member 281 attached to the lens holding frame 222. In this state, when a minus driver is inserted into the slot 285 and the fixing member 281 is rotated, the eccentric hole 287 is displaced in a direction perpendicular to the optical axis X. As described above, since the rear end side end portion of the support shaft 271 is fixed to the fixed cylinder 210, the inclination of the support shaft 271 can be changed by rotating the fixing member 281.

  Further, the through hole 283 communicates with the inside of the eccentric hole 287. Therefore, the light beam of the autocollimator 199 can be irradiated to the mirror surface 273 formed on the end surface of the support shaft 271 inserted into the eccentric hole 287 through the through hole 283. Therefore, the tilt of the support shaft 271 can be adjusted by rotating the fixing member 281 while measuring the tilt of the support shaft 271 with the autocollimator 199.

  When the inclination of the support shaft 271 is adjusted, the adjustment result can be maintained by adhering or welding the fixing member 281 to the lens holding frame 222. Further, the fixing member 281 may be fixed by screwing a hollow set or the like from the peripheral surface of the lens holding frame 222 and bringing it into contact with the peripheral surface of the fixing member 281.

  As described above, the inclination of the support shaft 271 can be changed using the fixing member 281 having the eccentric hole 287. However, if the support shaft 271 does not become parallel to the optical axis X even after making one rotation of the fixing member 281, the fixing member 281 having a different interval between the center P of the fixing member 281 and the center Q of the eccentric hole 287 is used. Then, the inclination of the support shaft 271 is adjusted again. Thereby, the support shaft 271 can be accurately parallel to the optical axis X.

  When the fixing member 281 is rotated, the gap between the light beam and the reflected beam detected by the autocollimator 199 may change only in the direction in which it shifts, and the interval may be constant. In such a case, the support shaft 271 can be parallel to the optical axis X by fixing the tip of the support shaft 271 to the center of the fixing member 281. However, the fixing member 281 having the eccentric hole 287 cannot be positioned around the end of the support shaft 271.

  FIG. 14 is a cross-sectional view of another fixing member 289. In the fixing member 289, the same elements as those of the fixing member 281 shown in FIGS. 10 to 13 are denoted by the same reference numerals, and redundant description is omitted.

  The fixing member 289 has a coaxial hole 297 coaxial with the through hole 283 instead of the eccentric hole 287 of the fixing member 281. The coaxial hole 297 has the same inner diameter as the outer diameter of the support shaft 271. Further, the coaxial hole 297 communicates with the through hole 283.

  FIG. 15 is a perspective view for explaining the fixing of the support shaft 271. As described above, the fixing member 281 having the eccentric hole 287 can change the inclination of the support shaft 271 while being attached to the lens holding frame 222.

  However, if the support shaft 271 is already parallel to the optical axis X in the state shown in FIG. 8, the tilt adjustment of the support shaft 271 is not necessary. Further, when the fixing member 281 having the eccentric hole 287 is already attached to the support shaft 271 parallel to the optical axis X, the inclination of the support shaft 271 changes on the contrary. Therefore, when the tilt adjustment of the support shaft 271 is not necessary, the support shaft 271 may be fixed by the fixing member 289 having the coaxial hole 297 shown in FIG.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  The order of execution of each process such as operations, procedures, steps, and stages in the apparatus, system, program, and method shown in the claims, the description, and the drawings is particularly “before” or “prior to”. It should be noted that the output can be realized in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flow in the claims, the description, and the drawings, even if it is described using “first”, “next”, etc. for convenience, it means that it is essential to carry out in this order. It is not a thing.

DESCRIPTION OF SYMBOLS 100 Imaging device, 199 Autocollimator, 200 Lens unit, 210 Fixed cylinder, 212 Rib part, 213, 214 Fixing hole, 222, 232, 252 Lens holding frame, 216, 217 Screw hole, 218 Notch part, 219 Lens barrel CPU 220, 230, 240, 250 Lens, 234, 254 Fitting part, 236, 256 Engagement part, 260 Lens mount, 270, 271 Support shaft, 272, 273 Mirror surface, 280, 281, 289 Fixing member, 282 Holding hole , 283 Through hole, 284 Hexagon hole, 285 Slot, 286 Insertion hole, 287 Eccentric hole, 290, 291 Set screw, 297 Coaxial hole, 300 Camera body, 320 Main board, 322 Main body CPU, 324 Image processing circuit, 330 Image sensor, 332 low-pass filter, 340 Display unit, 350 finder, 352 focusing screen, 354 penta prism, 356 finder optical system, 360 body mount, 370 mirror unit, 371 main mirror, 372 main mirror holding frame, 373 main mirror rotation axis, 374 sub mirror, 375 sub mirror holding Frame, 376 Sub mirror rotation axis, 380 Focusing optical system, 382 Focus detection sensor, 390 Photometric sensor, 400 Shutter device

Claims (3)

A support shaft that extends in the optical axis direction of the lens and has a mirror surface formed on the end surface on one end side;
A first fixing portion for holding the other end side of the support shaft;
A holding hole penetrating in the optical axis direction, holding the one end side of the support shaft in a state of being inserted into the holding hole, and the one end with respect to the other end side held in the first fixing portion A second fixing portion capable of adjusting a position in a direction orthogonal to the optical axis on the side;
A lens holding member that holds the lens and is supported by the support shaft;
A lens barrel comprising: The lens barrel according to claim 1, wherein the lens holding member is inserted through the support shaft so as to be movable in the optical axis direction. The lens barrel according to claim 1, further comprising a cylindrical member provided with the first fixing portion and the second fixing portion.

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