JP6657432B2 - Lens unit - Google Patents

Description

  The present invention relates to a lens unit that can be attached to an electronic device.

  As electronic devices, notebook computers and tablets having an imaging unit capable of imaging a subject are used. For example, there is an increasing need to image a document as a subject and digitize the document. To meet this need, a method of digitizing the document by using an imaging unit of an electronic device is being studied (see Patent Document 1). .

JP 2010-124406 A

  By the way, since the imaging unit of the conventional electronic device does not consider imaging of media (subjects) of various sizes, the quality of a captured image varies or deteriorates according to the size of the subject. There is a problem.

  Therefore, the present invention has been made in view of these points, and an object of the present invention is to appropriately and easily image subjects of various sizes with an electronic device.

  In one embodiment of the present invention, a lens unit that can be attached so as to face an imaging unit of an electronic device, a lens component in which a plurality of lenses having different lens characteristics are arranged in an arrangement direction, and the lens component And an operating member for moving the lens component such that one of the plurality of lenses faces the imaging unit, wherein the operating member is provided to be movable in the arrangement direction. And a lens unit having an operation section having a length in the arrangement direction larger than a length of one lens of the lens component in the arrangement direction.

  Further, the lens unit may further include a circular main body, and the plurality of lenses may be arranged in the main body along a circumferential direction.

  Further, the lens unit further includes a rectangular main body, the plurality of lenses are arranged in the main body along the longitudinal direction, and the operation member slides in the arrangement direction, The plurality of lenses may be moved in the arrangement direction.

  The operating section is provided so as to be exposed from the main body and movable in the arrangement direction, and the length of the operation section in the arrangement direction is larger than the length of the lens component in the arrangement direction. It may be that.

  Further, the operation member may have a grip portion that grips the lens component, and may move in the arrangement direction while gripping the lens component.

  ADVANTAGE OF THE INVENTION According to this invention, there exists an effect that subjects of various sizes can be appropriately and easily imaged by an electronic device.

FIG. 1 is a perspective view illustrating an example of a lens unit 1 according to an embodiment of the present invention. FIG. 2 is a perspective view of the lens unit 1 shown in FIG. 1 as viewed from the back. FIG. 3 is a front view of the lens unit 1 for explaining an arrangement state of a plurality of lenses. It is AA sectional drawing of FIG. FIG. 3 is a diagram illustrating a state where the lens unit 1 is attached to the electronic device 100. FIG. 2 is a schematic diagram for explaining a relationship between a lens of the lens unit 1 and an imaging unit 110 of the electronic device 100. FIG. 4 is a plan view of the lens unit 1 for explaining a plurality of positions of the slide knob 5. FIG. 2 is a schematic diagram illustrating a state in which a medium S is imaged by the electronic device 100 to which the lens unit 1 is attached. FIG. 3 is a diagram showing an image G of a medium S displayed in a live view on a display screen 120. FIG. 3 is a plan view of the lens unit 1. FIG. 2 is a front view of the lens unit 1. FIG. 3 is a bottom view of the lens unit 1. FIG. 3 is a rear view of the lens unit 1. FIG. 3 is a right side view of the lens unit 1. FIG. 3 is a left side view of the lens unit 1. FIG. 5 is a perspective view of a receiving case 2. It is the perspective view which looked at the receiving case 2 shown in FIG. 11 from the back side. It is a front view of the receiving case 2. It is a perspective view of the front case 3. It is the perspective view which looked at the front case 3 shown in FIG. 14 from the back side. FIG. 4 is a perspective view of a lens component 4. FIG. 4 is a plan view of a lens component 4. FIG. 4 is a front view of the lens component 4. FIG. 4 is a perspective view of a slide knob 5. It is a rear view of the slide knob 5.

<Overview of lens unit>
An overview of a lens unit according to an embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a perspective view showing an example of a lens unit 1 according to one embodiment of the present invention. FIG. 2 is a perspective view of the lens unit 1 shown in FIG. 1 as viewed from the rear side. FIG. 3 is a front view of the lens unit 1 for explaining an arrangement state of a plurality of lenses. FIG. 4 is a sectional view taken along line AA of FIG. FIG. 5 is a diagram showing a state in which the lens unit 1 is attached to the electronic device 100. FIG. 6 is a schematic diagram for explaining the relationship between the lens of the lens unit 1 and the imaging unit 110 of the electronic device 100. In FIG. 6, components other than the lens 42 of the lens unit 1 are omitted for convenience of explanation.

  The lens unit 1 includes a receiving case 2, a front case 3, a lens component 4, and a slide knob 5, as shown in FIGS. The lens component 4 is provided movably inside the receiving case 2 and the front case 3, and is a component in which a plurality of lenses (lenses 42, 43, and 44 shown in FIG. 3) are integrated. The lens component 4 is gripped by the slide knob 5 as shown in FIG. 4, and moves in the longitudinal direction in conjunction with a slide operation of the slide knob 5 in the longitudinal direction (X direction in FIG. 1) by the user. . As shown in FIGS. 5 and 6, the lens unit 1 is configured to be attachable so as to face the imaging unit 110 of the electronic device 100.

  The electronic device 100 is, for example, a notebook computer as shown in FIG. Note that the electronic device 100 is not limited to a notebook computer, and may be, for example, a tablet terminal having a single housing. The electronic device 100 includes an input housing 102 and a display housing 104.

  The input housing 102 has a keyboard on which operation keys (not shown) are arranged. The display-side housing 104 is connected to the input-side housing 102 so as to be openable and closable. The display-side housing 104 has a configuration that can be used separately from the input-side housing 102. The display housing 104 has an imaging unit 110 and a display screen 120, as shown in FIG.

  The imaging unit 110 is built in the display housing 104 and has a lens 112 and an imaging element 114. The lens 112 focuses incident light on the image sensor 114. The image sensor 114 is, for example, a CCD or a CMOS. The image sensor 114 converts the amount of incident light condensed by the lens 112 into R, G, and B light amounts and outputs an analog signal.

  The display screen 120 is provided on the display-side housing 104 on the side opposite to the surface on which the lens unit 1 is mounted. The display screen 120 displays an image of the subject captured by the imaging unit 110, and displays the subject in live view. Further, on the display screen 120, a touch panel that can be touched by a user is superimposed. When the user uses the display-side housing 104 separately from the input-side housing 102, the user performs a touch operation to image the subject with the imaging unit 110.

  Further, a concave portion 105a (FIG. 5) is formed on the upper surface 105 of the display-side housing 104 along the longitudinal direction of the housing. The recess 105a communicates with, for example, an exhaust hole from which air in the display-side housing 104 is exhausted. The lens unit 1 is attached to the electronic device 100 by hooking the hook in the concave portion 105a. Further, the lens unit 1 has a double-sided tape attached to the back side, and is fixed to the display-side housing 104 by the double-sided tape.

  By the way, the imaging unit 110 of the electronic device 100 can image a plurality of media having different sizes. For example, the imaging unit 110 captures A4 size paper, A5 size paper, a license, or the like as a medium. As described above, when images of media of various sizes are taken, focus is not achieved using only the lens 112 in the imaging unit 110, even if the image is taken while adjusting the distance between the electronic device 100 and the medium. Cases may occur. That is, an out-of-focus image is captured. In particular, when performing OCR processing based on an image captured by a user, the OCR processing cannot be performed if the image is out of focus and blurred.

  Thus, in the present embodiment, the lens unit 1 having the plurality of lenses 42, 43, and 44 is configured to be attachable to the electronic device 100. The lenses 42, 43, and 44 have lens characteristics suitable for imaging a specific medium, respectively, when used in combination with the lens 112 of the imaging unit 110. For example, the lens 42 has a characteristic of focusing when imaging A4 size paper, the lens 43 has a characteristic of focusing when imaging A5 size paper, and the lens 44 has a license. Has the characteristic of being focused when capturing an image.

  Then, in the present embodiment, the user selects one of the lenses 42, 43, and 44 arranged along the longitudinal direction of the lens unit 1 as shown in FIG. Switching is possible such that one lens faces the lens 112 (see FIG. 6). For example, the user switches to the lens 42 when imaging A4 size paper, switches to the lens 43 when imaging A5 size paper, and switches to the lens 44 when imaging a license. Switching of the lenses 42, 43, 44 is performed by sliding the slide knob 5 of the lens unit 1.

  FIG. 7 is a plan view of the lens unit 1 for explaining a plurality of positions of the slide knob 5. FIG. 7A illustrates a first position of the slide knob 5 in which the lens 42 of the lenses 42, 43, and 44 faces the lens 112. FIG. 7B illustrates a second position of the slide knob 5 in which the lens 43 faces the lens 112. FIG. 7C illustrates a third position of the slide knob 5 in which the lens 44 faces the lens 112. The user positions the slide knob 5 at the first position in FIG. 7A when imaging A4 size paper, and moves the slide knob 5 in FIG. 7B when imaging A5 size paper. When the driver is located at the second position and the driver's license is imaged, the slide knob 5 is located at the third position in FIG. 7C.

Here, the flow of imaging of the medium S by the electronic device 100 to which the lens unit 1 is attached will be described with reference to FIGS. 8 and 9.
FIG. 8 is a schematic diagram illustrating a state in which the electronic device 100 in which the lens unit 1 is attached to the display housing 104 captures an image of the medium S. FIG. 9 is a diagram showing an image G of the medium S displayed in the live view on the display screen 120. In FIG. 8, the display housing 104 to which the lens unit 1 is attached is used separately from the input housing 102.

  Here, it is assumed that the medium S to be imaged is A4 size paper. Since the medium S is A4 size paper, the user positions the slide knob 5 at the first position in FIG. 7A. The focal lengths of the lenses 42, 43, and 44 of the lens unit 1 are set so that the image G is most focused when the image G is displayed on the entire display screen 120 as shown in FIG. For this reason, the user brings the electronic device 100 closer to the medium S until the image G for displaying the medium S in live view is displayed on the entire display screen 120. Accordingly, the user can easily grasp an appropriate imaging position, and thus can easily acquire a clear image G.

When the user continuously takes an image of A5 size paper or a license, the user slides the slide knob 5 without replacing the lens unit 1 so that the clear image G corresponding to the medium to be imaged is obtained. It becomes possible to acquire. As described above, it is possible to appropriately image a plurality of types of media with a simple operation.
Hereinafter, a detailed configuration of the lens unit 1 will be described.

<Detailed configuration of lens unit>
FIG. 10A is a plan view of the lens unit 1. FIG. 10B is a front view of the lens unit 1. FIG. 10C is a bottom view of the lens unit 1. FIG. 10D is a rear view of the lens unit 1. FIG. 10E is a right side view of the lens unit 1. FIG. 10F is a left side view of the lens unit 1.

  The lens unit 1 has a receiving case 2, a front case 3, a lens component 4, and a slide knob 5, as shown in FIGS. 10A to 10F. In the present embodiment, the receiving case 2 and the front case 3 correspond to a main body having a rectangular shape, and the slide knob 5 corresponds to an operation member. Hereinafter, a detailed structure will be described for each component.

(Receiving case 2)
FIG. 11 is a perspective view of the receiving case 2. FIG. 12 is a perspective view of the receiving case 2 shown in FIG. FIG. 13 is a front view of the receiving case 2. The receiving case 2 is a member having a rectangular shape. As shown in FIGS. 11 to 13, the receiving case 2 includes a flat portion 21, a wall portion 22, an extending portion 23, position specifying portions 24 a to 24 c, a hook 25, and a guide concave portion 26. It has projections 27a to 27c.

  The flat portion 21 is a rectangular portion serving as a base of the receiving case 2. A circular opening 21 a is formed in the center of the flat portion 21. The opening 21a faces the imaging unit 110 when the lens unit 1 is attached to the electronic device 100. The size of the opening 21a is substantially the same as the size of the lenses 42, 43, and 44.

  The wall portion 22 is a portion erected from the flat portion 21 along the outer shape of the flat portion 21. The lens component 4 is movably disposed in a region surrounded by the wall 22. A cutout 22a is formed in the center of the upper wall of the wall 22 in order to avoid interference with the grip 52 of the slide knob 5 that grips the lens component 4.

  The extending portion 23 is a portion extending from one end (upper end) of the flat portion 21 in the short direction in a direction opposite to the direction in which the wall portion 22 is erected. The extension portion 23 is provided on the center side in the longitudinal direction of the receiving case 2.

  The position specifying sections 24a to 24c specify the first position, the second position, and the third position of the slide knob 5. The position specifying units 24a to 24c are marks formed by printing, for example. Characters or the like indicating the type of medium suitable for imaging at each position of the slide knob 5 may be printed around the mark. In such a case, the user can easily position the slide knob 5 at a position corresponding to the medium to be imaged.

  The hook 25 is provided on the distal end side of the extension 23 as shown in FIG. When the lens unit 1 is attached to the electronic device 100, the hook 25 is engaged with the concave portion 105a (FIG. 5) of the display housing 104.

  The guide concave portion 26 is formed in the notch 22a above the opening 21a of the flat portion 21 along the longitudinal direction. The guide recess 21b has a function of guiding the movement of the slide knob 5.

  The engagement projections 27a to 27c are projections formed at predetermined intervals in the guide recess 26 as shown in FIG. The engagement protrusions 27a to 27c engage with the slide knob 5 when the slide knob 5 is located at a predetermined position.

(Table Case 3)
FIG. 14 is a perspective view of the front case 3. FIG. 15 is a perspective view of the front case 3 shown in FIG. 14 as viewed from the rear side. The front case 3 is a member having substantially the same size as the receiving case 2, and has a function of covering the receiving case 2 and the lens component 4. As shown in FIGS. 14 and 15, the front case 3 has a flat portion 31, a wall portion 32, support portions 33 a and 33 b, and a guide recess 34.

  The flat portion 31 is a rectangular portion serving as a base of the front case 3. A circular opening 31 a is formed in the center of the flat portion 31. The opening 31a is formed at a position corresponding to the opening 21a of the receiving case 2 (see FIG. 4). The size of the opening 31a is substantially the same as the size of the opening 21a.

  The wall portion 32 is a portion that stands upright from the edge of the flat portion 31. When the wall portion 32 is locked with the wall portion 22 of the receiving case 2, the main body portion has a rectangular parallelepiped shape. A notch 32a is formed at the center of the upper wall of the wall portion 32 (at a position facing the notch 22c of the receiving case 2) in order to avoid interference with the holding portion 52 holding the lens component 4 of the slide knob 5. ing.

  The support portions 33a and 33b are portions that support the sliding contact protrusions 46 (FIG. 16) of the lens component 4. The support portions 33a and 33b protrude from the flat portion 31 by a predetermined height along the longitudinal direction on both sides of the opening 31a.

  The guide concave portion 34 is formed in the notch 32a above the supporting portion 33b of the flat portion 31 along the longitudinal direction. The guide recess 34 has a function of guiding the movement of the slide knob 5 together with the guide recess 26 of the receiving case 2.

(Lens parts 4)
FIG. 16 is a perspective view of the lens component 4. FIG. 17 is a plan view of the lens component 4. FIG. 18 is a front view of the lens component 4. The lens component 4 is a rectangular integrated component obtained by integrating a plurality of lenses. As shown in FIGS. 16 to 18, the lens component 4 has a base portion 41, lenses 42, 43, 44, a gripped portion 45, and sliding contact protrusions 46, 47, 48.

  The base part 41 is a flat part. Three lenses 42, 43, and 44 are fitted in the base portion 41 at predetermined intervals. The thickness of the base 41 is substantially the same as the thickness of the lenses 42, 43, 44.

  The lenses 42, 43, and 44 are made of resin, and are made of, for example, acrylic resin such as PMMA having excellent transparency and the like. The lenses 42, 43, and 44 have different lens characteristics. For example, the lenses 42, 43, and 44 have different focal lengths. The focal lengths of the lenses 42, 43, and 44 are set such that the angle of view when the corresponding medium having a predetermined size is imaged by the imaging unit 110 corresponds to the size of the display screen 120 of the electronic device 100. Is set. Thereby, as shown in FIG. 9 described above, when the image G corresponding to the medium is displayed on the entire display screen 120, the focus is most focused.

  The diameters of the lenses 42, 43, and 44 are the same, and are larger than the diameter of the lens 112 of the imaging unit 110 of the electronic device 100 (see FIG. 6). Each of the lenses 42, 43, and 44 has a plane (for example, a plane 42a of the lens 42 as shown in FIG. 6) and a spherical surface opposite to the plane (spherical surfaces 42b, 43b, and 44b shown in FIG. 18). The planes of the lenses 42, 43, and 44 face the receiving case 2, and the spherical surfaces 42b, 43b, and 44b face the front case 3. Therefore, when the lens unit 1 is attached to the electronic device 100, the plane is flat. 42a and the like face the lens 112 of the imaging unit 110 (see FIG. 6), and the thicknesses of the centers of the lenses 42, 43, 44 are the same, respectively. , 44 are flat, but the present invention is not limited to this, and both surfaces may be spherical.

  The gripped portion 45 is a portion that is gripped by the grip portion 52 (FIG. 19) of the slide knob 5. The gripped portion 45 is a portion extending from the upper surface of the base portion 41. The gripped portion 45 is located at the notch 22 a of the receiving case 2 and the notch 32 a of the front case 3.

  The sliding contact projection 46 is a projection formed on the front surface of the base portion 41, the sliding contact projection 47 is a projection formed on the back surface opposite to the front surface of the base portion 41, and the sliding contact projection 48 is These are projections formed on the bottom surface of the base 41. When the lens component 4 moves, the sliding contact protrusions 46, 47, and 48 slide contact with the receiving case 2 and the front case 3, respectively (see FIG. 4). A gap is formed between the lenses 42, 43, 44 and the receiving case 2 and the front case 3 by the sliding contact protrusions 46, 47, 48 located around the lenses 42, 43, 44. It is possible to prevent the lenses 42, 43, and 44 from contacting the receiving case 2 and the front case 3 and being damaged by the movement.

  In the above description, since the lens component 4 is a component in which the plurality of lenses 42, 43, and 44 are integrated, when each of the lenses 42, 43, and 44 faces the lens 112 of the imaging unit 110, Variations in the axial distance can be suppressed. As a result, an appropriate image can be obtained even when the lens is switched.

(Slide knob 5)
FIG. 19 is a perspective view of the slide knob 5. FIG. 20 is a rear view of the slide knob 5. The slide knob 5 slides between the first position, the second position, and the third position shown in FIG. As shown in FIGS. 19 and 20, the slide knob 5 has an operation section 51, a grip section 52, guide projections 53a and 53b, and an engagement recess 54.

  The operation unit 51 is a rod-shaped portion. The operation unit 51 is located on the wall 22 of the receiving case 2 and the wall 32 of the front case 3 (see FIG. 1). The operation unit 51 has an operation surface 51a on which the user slides the slide knob 5 with, for example, a finger pad. On the operation surface 51a, irregularities 51b are formed over a predetermined width in the longitudinal direction. By forming the unevenness 51b, the belly of the finger can be easily caught on the operation surface 51a, and thus the slide knob 5 can be easily slid.

  Further, a position specifying section 51c for specifying the position of the slide knob 5 in cooperation with the position specifying sections 24a to 24c of the receiving case 2 is formed at one longitudinal end of the operation surface 51a. The position specifying unit 51c is, for example, a mark formed by printing. When the position specifying unit 51c is located beside the position specifying unit 24a as shown in FIG. 7A, it indicates that the slide knob 5 is located at the first position. When the position specifying unit 51c is located beside the position specifying unit 24b as shown in FIG. 7B, it indicates that the slide knob 5 is located at the second position. When the position specifying unit 51c is located beside the position specifying unit 24c as shown in FIG. 7C, it indicates that the slide knob 5 is located at the third position.

  The holding part 52 holds the lens component 4. The grip part 52 is formed so as to protrude downward from the longitudinal center of the operation part 51. The grip portion 52 has a concave portion 52a for gripping the gripped portion 45 of the lens component 4. The slide knob 5 moves the lens component 4 in the longitudinal direction by sliding in the longitudinal direction with the concave portion 52a gripping the gripped portion 45. Thus, the user can easily move the lens component 4 by sliding the slide knob 5.

  The guide protrusions 53a and 53b are portions protruding outward in the width direction from the grip portion 52, respectively. The guide projection 53a is guided by the guide recess 26 of the receiving case 2, and the guide projection 53b is guided by the guide recess 34 of the front case 3. Thereby, the slide knob 5 slides along the guide concave portions 26 and 34.

  The engagement recess 54 is a recess further formed on the center side of the guide projection 53a. The engagement recess 54 engages with the engagement protrusions 27 a to 27 c (FIG. 13) of the receiving case 2 when the slide knob 5 moves and is located at any of the first position to the third position. For example, the engagement recess 54 engages with the engagement protrusion 27a when the slide knob 5 is located at the first position (the position shown in FIG. 7A), and the slide knob 5 is in the second position (FIG. When the slide knob 5 is located at the third position (the position shown in FIG. 7C), it engages with the engagement protrusion 27c when the slide knob 5 is at the third position (the position shown in FIG. 7C). . Then, the operation load changes when the engagement concave portion 54 engages with the engagement protrusions 27a to 27c, so that the operation feeling of the slide knob 5 is easily transmitted to the user.

(Modification)
In the above description, the arrangement direction of the lenses 42, 43, and 44 is the longitudinal direction of the lens unit 1, but is not limited to this. For example, the lenses 42, 43, and 44 may be arranged in a circular body along the circumferential direction. In such a case, the operating members rotate the lenses 42, 43, and 44 in the circumferential direction so that one lens faces the lens 112 of the imaging unit 110.

In the above description, the lenses 42, 43, and 44 have different focal lengths as lens characteristics, but are not limited to this. For example, as the lens characteristics, the viewing angles of the lenses may be different.
In the above description, the lens component 4 has the three lenses 42, 43, and 44, but is not limited to this. For example, the lens component 4 may have two or four or more lenses.

  In the above description, the engagement recess 54 is formed in the slide knob 5 and the engagement protrusions 27a to 27c are formed in the receiving case 2, but the present invention is not limited to this. For example, an engagement protrusion may be formed on the slide knob 5 and an engagement recess may be formed on the receiving case 2.

<Effect in this embodiment>
As described above, the lens unit 1 according to the present embodiment can be attached so as to face the imaging unit 110 of the electronic device 100. The lens unit 1 includes a plurality of lenses 42, 43, 44 having different lens characteristics, and a lens 42, such that one of the lenses 42, 43, 44 faces the opening 21 a of the receiving case 2. And a slide knob 5 for moving 43 and 44.
Accordingly, when the imaging unit 110 captures images of various sizes, one of the lenses 42, 43, and 44 according to the size of the medium to be captured is moved so as to face the opening 21a. Thus, an in-focus image can be obtained. As a result, the OCR process can be appropriately performed based on the focused image.
Further, since the lenses 42, 43, and 44 can be moved by sliding the slide knob 5, the lenses can be easily switched even when the lens unit 1 is attached to the electronic device 100.

  As described above, the present invention has been described using the embodiments, but the technical scope of the present invention is not limited to the scope described in the above embodiments. It is apparent to those skilled in the art that various changes or improvements can be made to the above embodiment. In particular, the specific embodiment of the distribution / integration of the apparatus is not limited to the above-described one, and all or a part of the apparatus is arbitrarily added according to various additions or the like, or according to a functional load. It can be configured to be distributed or integrated functionally or physically.

DESCRIPTION OF SYMBOLS 1 Lens unit 2 Receiving case 3 Front case 4 Lens part 5 Slide knob 21a Opening 27a-27c Engagement projection 31a Opening 42, 43, 44 Lens 46, 47, 48 Sliding projection 51a Operation surface 52 Grip part 54 Engagement concave part 100 Electronic device 110 Imaging unit 112 Lens 120 Display screen

Claims (5)

A lens unit that can be attached so as to face an imaging unit of the electronic device,
A lens component in which a plurality of lenses having different lens characteristics are arranged in the arrangement direction;
An operation member connected to the lens component, and configured to move the lens component such that one of the plurality of lenses faces the imaging unit;
With
The operating member is provided so as to be movable in the arrangement direction, and has an operation unit whose length in the arrangement direction is larger than the length in the arrangement direction of one lens of the lens component.
Lens unit. It further comprises a circular main body,
The plurality of lenses are arranged along the circumferential direction in the main body,
The lens unit according to claim 1. It further comprises a rectangular main body,
The plurality of lenses are arranged in the main body along the longitudinal direction,
The operation member slides the plurality of lenses in the arrangement direction by sliding in the arrangement direction,
The lens unit according to claim 1. The operation unit is provided so as to be exposed from the main body unit and movable in the arrangement direction,
A length of the operation unit in the arrangement direction is larger than a length of the lens component in the arrangement direction;
The lens unit according to claim 2. The operating member has a grip portion for gripping the lens component, and moves in the arrangement direction while gripping the lens component.
The lens unit according to claim 1.