CN219266630U - Lens module and imaging system - Google Patents

Abstract

The utility model relates to the technical field of image equipment, in particular to a lens module and an imaging system, wherein the imaging system comprises a lens module, the lens module comprises a lens barrel, a lens and a mounting piece, and the lens barrel comprises a light inlet end; the lens is arranged at the light inlet end; the mounting piece is detachably arranged at the light inlet end and positioned at one side of the lens, which is away from the lens barrel, and is used for applying pre-pressure to the lens towards the lens barrel so as to clamp the lens between the lens barrel and the mounting piece; one side of the mounting piece, which is away from the lens barrel, is provided with a stress part used for being connected with a locking tool. According to the lens module and the imaging system, the detachable mounting piece is arranged, and the lens is clamped between the mounting piece and the lens barrel, so that the lens can be conveniently dismounted, and even if the lens is damaged, the lens can be simply replaced or maintained, so that the maintenance time cost and the economic cost are reduced, and the use experience of a user is improved; and because the replacement is simple and the cost is low, no additional protective lenses are needed.

Description

Lens module and imaging system

Technical Field

The present disclosure relates to imaging devices, and particularly to a lens module and an imaging system.

Background

When the lens is used, the lens needs to be exposed, so that the lens is generally arranged on the outer surface of the electronic device during design, and is extremely easy to scratch and crack due to impact, so that the service life of the lens is seriously reduced; particularly, the fish-eye lens is more easy to collide due to the fact that the lens is more convex. The lens is a high-precision component, and the use effect is seriously affected after damage, and even the lens cannot be used. And the general price of camera lens is higher, and the structure is accurate, and the user can't maintain by oneself or change the lens, needs professional to maintain, can consume a large amount of time cost and economic cost after consequently the camera lens damages, seriously influences user experience.

In the prior art, there are lenses with protective lenses, which are generally spherical protective covers or plane protective covers, by arranging a protective lens outside the lens to protect the lens inside. However, the additional protective lens has a certain protective effect, but can affect the original shooting effect of the lens.

Disclosure of Invention

The utility model provides a lens module and an imaging system, which can detach a damaged lens on a lens barrel and replace or repair the damaged lens so as to reduce the repair cost of the lens.

In order to solve the technical problems, one technical scheme adopted by the embodiment of the utility model is as follows: providing a lens module, wherein the lens module comprises a lens barrel, a lens and a mounting piece, and the lens barrel comprises a light inlet end; the lens is arranged at the light inlet end; the mounting piece is detachably arranged at the light inlet end and is positioned at one side of the lens, which is away from the lens barrel, and is used for applying precompression to the lens towards the lens barrel so as to clamp the lens between the lens barrel and the mounting piece; the mounting piece is provided with a stress part on one side deviating from the lens barrel, and the stress part is used for being connected with a locking tool so that the mounting piece can rotate under the drive of the locking tool.

In some embodiments, the light inlet end is provided with a positioning groove, and the lens is at least partially disposed in the positioning groove.

In some embodiments, the side wall of the positioning groove is provided with a first positioning surface, the outer circumferential surface of the lens is provided with a second positioning surface, the first positioning surface and the second positioning surface are both cylindrical, and at least one end of the first positioning surface is sleeved on the second positioning surface.

In some embodiments, the bottom surface of the positioning groove is provided with a plurality of positioning bosses, and the positioning bosses are arranged at intervals along the bottom surface of the positioning groove so as to support the lens towards one side surface of the lens barrel.

In some embodiments, the force receiving portion includes a plurality of force receiving grooves arranged at intervals around a rotation direction of the mounting member, the force receiving grooves being for clamping with the locking tool.

In some embodiments, the mount is threadably coupled to the barrel.

In some embodiments, the mounting member is snap-connected with the lens barrel.

In some embodiments, a third positioning surface is disposed on a side of the mounting element facing the lens barrel, a fourth positioning surface is disposed on a side of the lens facing away from the lens barrel, the third positioning surface and the fourth positioning surface are both annular, and the third positioning surface contacts the fourth positioning surface and applies the pre-compression force to the fourth positioning surface.

In some embodiments, the lens module further includes a sealing member, the sealing member is sandwiched between the lens and the lens barrel, and the sealing member is used for sealing a space formed by the lens and the lens barrel.

In some embodiments, the lens comprises at least one of a wide angle lens, a light reducing lens, a polarizing lens, an ultraviolet lens, and a diving filter.

In order to solve the technical problems, another technical scheme adopted by the embodiment of the utility model is as follows: an imaging system is provided, the imaging system includes a photosensitive member and the lens module set according to any one of the above, the lens module set is disposed on a photosensitive path of the photosensitive member.

Different from the situation of the related art, the lens module and the imaging system provided by the embodiment of the utility model have the advantages that the detachable mounting piece is arranged, and the lens is clamped between the mounting piece and the lens barrel, so that the lens can be conveniently dismounted, and even if the lens is damaged, the lens can be simply replaced or maintained, thereby reducing the time cost and the economic cost of maintenance and improving the use experience of users; and because the replacement is simple and the cost is low, no additional protective lenses are needed.

Drawings

FIG. 1 is a front view of a lens module according to an embodiment of the utility model;

FIG. 2 is a top view of a lens module according to an embodiment of the utility model;

FIG. 3 is a cross-sectional view of a lens module according to an embodiment of the utility model;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a cross-sectional view of a lens module according to another embodiment of the utility model;

FIG. 6 is a partial enlarged view at B in FIG. 5;

fig. 7 is a front view of a lens barrel according to another embodiment of the utility model.

Reference numerals in the specific embodiments are as follows:

100. a lens module;

1. a lens barrel; 11. a positioning groove; 12. a first positioning surface; 13. positioning the boss; 14. sealing grooves; 15. a step structure; 16. an external thread; 17. a mating portion; 171. an opening;

2. a lens; 21. a second positioning surface; 22. a fourth locating surface; 23. a convex ring;

3. a seal;

4. a mounting member; 41. an internal thread; 42. a third positioning surface; 43. a stress groove; 44. a sealing part; 45. and a mounting part.

Detailed Description

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween.

In the description of the present utility model, it should be noted that, orientation words such as "front, rear, upper, lower, left, right", "transverse, vertical, horizontal", and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and these orientation words do not indicate or imply that the apparatus or elements being referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

In the description of the present utility model, it should be noted that, the terms "first," "second," and the like are used for defining the components, and are merely for convenience in distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, so they should not be construed as limiting the scope of the present utility model. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not collide with each other.

In order to solve the technical problems, one technical scheme adopted by the embodiment of the utility model is as follows: the lens module 100 is provided, as shown in fig. 1 to 3, the lens module 100 comprises a lens cone 1, a lens 2, a sealing element 3 and a mounting element 4, the lens 2 is clamped between the lens cone 1 and the mounting element 4, and the lens 2 is positioned at the end part of the lens cone 1, and the mounting element 4 is detachably connected with the lens cone 1, so that the lens 2 can be detached simply and conveniently, and the mounting is also convenient, so that when the lens 2 is damaged, the lens module can be automatically replaced without being sent to a professional maintenance site for maintenance, thereby not only reducing the maintenance cost, but also reducing the time cost, and further reducing the use cost of the lens. And also need not to carry out excessive protection to the camera lens, for example cover the protection lens for the camera lens forehead and set up the damage of lens inside lens 2 in order to reduce the camera lens, because inside lens 2 can simple dismantlement change, therefore extra protection lens appears unnecessary to the protection lens of quality is poor still can greatly reduced the shooting effect of camera lens. The sealing piece 3 is used for sealing the space formed by the enclosing of the lens 2 and the lens cone 1, so that water vapor is reduced from entering the lens cone 1, and the problem that water mist appears in the lens is solved.

Next, the specific structures of the lens barrel 1, the lens 2, the sealing member 3, and the mount 4 described above will be described in order.

In the lens barrel 1, the lens barrel 1 includes a light inlet end and a light outlet end, the light inlet end and the light outlet end are two ends of the lens barrel 1, the lens barrel 1 is generally cylindrical, and a plurality of light transmitting sheets (not shown) can be disposed therein. The light-emitting end is generally connected to a main body portion (not shown) of the camera, the main body portion (not shown) including a housing, a photosensitive member, a shutter, a battery, a circuit board, and the like, wherein the photosensitive member (not shown) is located at the light-emitting end to receive light passing through the lens barrel 1 and form an image or generate image data.

As shown in fig. 3, the light inlet end is provided with a positioning groove 11, the positioning groove 11 extends along the axial direction of the lens barrel 1, and the positioning groove 11 is used for accommodating the lens 2, so that the position of the lens 2 along the radial direction and the axial direction of the lens barrel 1 can be limited, and the optical performance of the lens 2 is ensured. The radial direction of the lens barrel 1, namely, the normal direction of any point of the outer circumferential surface of the lens barrel 1, has countless numbers; the axial direction of the lens barrel 1, that is, the direction parallel to the outer peripheral surface of the lens barrel 1, has only one.

Specifically, as shown in fig. 3 and 4, the side wall of the positioning groove 11 is provided with a first positioning surface 12, the first positioning surface 12 is cylindrical, and the first positioning surface 12 is used for contacting with the outer peripheral surface of the lens 2 so as to limit the position of the lens 2 along the radial direction of the lens barrel 1; the bottom surface of the positioning groove 11 is provided with a plurality of positioning bosses 13, and the positioning bosses 13 are arranged at intervals along the bottom surface of the positioning groove 11 so as to support the lens 2 to face one side surface of the lens barrel 1, thereby positioning the lens 2 along the axial direction of the lens barrel 1. Optionally, the positioning bosses 13 are arranged at intervals along the extending direction of the sidewall of the positioning groove 11.

As shown in fig. 3 and fig. 4, the bottom of the positioning groove 11 is further provided with a sealing groove 14, the sealing groove 14 is used for accommodating the sealing member 3, and the sealing groove 14 extends along the side wall of the positioning groove 11 and is connected end to form a ring shape, so that the sealing member 3 contacts with the edge of the lens 2, and the area of the side of the lens 2 facing the lens barrel 1, where water mist may occur, is reduced, that is, the available area of the lens 2 is increased.

As shown in fig. 3 and 4, the outer side wall of the light inlet end of the lens barrel 1 is provided with a step structure 15, i.e. a circular ring is cut out at the outer side wall, the outer circumferential surface of the step structure 15 is provided with an external thread 16, and the external thread 16 is used for being in threaded connection with the mounting member 4. Since the external thread 16 is disposed on the outer circumferential surface of the step structure 15, the protruding height of the mount 4 in the radial direction of the lens barrel 1 can be reduced, and even lower than the outer circumferential surface of the lens barrel 1, so as to reduce the collision to the mount 4 and increase the protection to the mount 4.

As shown in fig. 3 and 4, the lens 2 is at least partially disposed in the positioning groove 11, that is, disposed at the light entrance end, and may protrude from the positioning groove 11 along the axial direction of the lens barrel 1. The lens 2 is in a disc shape, and the surfaces of both sides can be plane or curved (only curved surface is shown in the figure), and materials for absorbing light or specific light, such as ultraviolet light, can be added into the lens 2 to absorb light with specific polarization direction. Therefore, the lens 2 may be at least one of a wide angle lens, a light reducing lens, a polarizer, an ultraviolet lens and a diving filter, and a user can replace a single lens or a lens group according to the requirement.

As shown in fig. 3 and 4, the outer peripheral surface of the lens 2 is provided with a second positioning surface 21, the second positioning surface 21 is cylindrical, and when the lens 2 is mounted in the positioning groove 11, at least one end of the first positioning surface 12 is sleeved on the second positioning surface 21, so as to define the position of the lens 2 along the radial direction of the lens barrel 1; and the first positioning surface 12 and the second positioning surface 21 are both cylindrical, so that the lens 2 can be installed in the positioning groove 11 at any angle, the installation difficulty is reduced, the contact is tight, the lens is not easy to shake, and even a certain sealing effect is achieved.

As shown in fig. 3 and 4, a side of the lens 2 facing away from the lens barrel 1 is provided with a fourth positioning surface 22, the fourth positioning surface 22 being adapted to contact the mount 4, the fourth positioning surface 22 being annular and extending along an edge of the lens 2 so as to space a portion of the lens 2 surrounded by the fourth positioning surface 22 from the mount 4, i.e., a central portion of the lens 2 is adapted to be penetrated by light and an edge portion is adapted to be fixed.

It will be appreciated that different lenses 2 may have different shapes and functions, but they all have the same fourth positioning surface 22 and second positioning surface 21, so as to achieve standardized and modularized production, reduce production cost, and facilitate the replacement of the lenses 2 according to the own needs.

As shown in fig. 3 and 4, the outer peripheral surface of the lens 2 is provided with a convex ring 23, the convex ring 23 protrudes from the second positioning surface 21 along the radial direction of the lens 2, and when the convex ring 23 is positioned on one side of the second positioning surface 21 away from the lens barrel 1, and the lens 2 is mounted on the positioning groove 11, the convex ring 23 is positioned outside the positioning groove 11, and at this time, the convex ring 23 can be applied to force to remove the lens 2 from the positioning groove 11, so that the problem that the lens 2 is difficult to remove when the lens 2 is completely sunk into the positioning groove 11 can be solved. Further, the fourth positioning surface 22 is at least partially disposed on a side surface of the convex ring 23, so as to increase an area of the fourth positioning surface 22, disperse a reaction force of the lens 2 to the mounting member 4, improve a problem that a contact portion of the mounting member 4 and the lens 2 is damaged easily, and prolong a service life of the mounting member 4.

As shown in fig. 3 and 4, the sealing member 3 is disposed in the positioning groove 11, protrudes outward from the positioning groove 11, and is higher than the positioning boss 13 in the axial direction of the lens barrel 1, so as to be in contact with the lens 2, that is, the sealing member 3 is interposed between the lens 2 and the lens barrel 1. Optionally, the sealing element 3 is a rubber sealing ring.

For the above-mentioned mounting member 4, as shown in fig. 2, the mounting member 4 is annular, as shown in fig. 3 and 4, an internal thread 41 is provided on an inner side surface of the mounting member 4, and the internal thread 41 is adapted to the external thread 16 of the lens barrel 1, so that the mounting member 4 is screwed with the lens barrel 1, and the mounting member 4 is detachably mounted on the lens barrel 1. And the mount 4 is attached to the lens barrel 1, a pre-pressing force toward the lens barrel 1 can be applied to the lens 2 so as to sandwich the lens 2 between the lens barrel 1 and the mount 4. In addition, the mounting member 4 drives the lens 2 to press down the sealing member 3 in the process of rotating and mounting, and when the mounting member 4 is mounted in place, the compression amount of the sealing member 3 can be ensured, so that the lens 2 and the lens barrel 1 can be kept airtight and waterproof.

In some embodiments, the connection between the mount 4 and the lens barrel 1 may be other ways, such as a snap-fit connection. As shown in fig. 5 to 7, the inner side surface of the mounting member 4 is provided with a mounting portion 45, and the outer peripheral surface of the step structure 15 of the lens barrel 1 is correspondingly provided with a mating portion 17, and the mounting portion 45 and the mating portion 17 can be in snap connection, so that the lens 2 is clamped between the lens barrel 1 and the mounting member 4. Specifically, the mounting portion 45 is a bump, and the mating portion 17 is a chute, as shown in fig. 7, which has an opening 171 penetrating along the axial direction of the lens barrel 1 for mating the bump into the chute. When the mounting member 4 is mounted, the protruding block is aligned with the opening 171 of the chute, and presses down the mounting member 4, the protruding block enters the chute, and further rotates the mounting member 4 to enable the protruding block to slide in the chute, as shown in fig. 7, a side wall facing downward in the inner wall of the chute gradually moves away from the top surface of the mounting member 4 downwards along the sliding direction of the protruding block, so that the protruding block can be guided and limited downwards and along the circumferential direction of the lens barrel 1 until the protruding block is clamped at the end of the chute, and at this time, the lens 2 is pressed down to a preset position by the mounting member 4. When the mounting part and the matching part are in clamping connection, not only the lens 2 can be mounted in place, but also the compression amount of the sealing element 3 can be ensured, so that the lens 2 and the lens barrel 1 can be kept airtight and waterproof. Optionally, the bump is cylindrical. Optionally, at least two mounting portions 45 are provided and are arranged at equal angular intervals along the circumference of the mounting member 4, and the mating portions 17 are provided corresponding to the number and positions of the mounting portions 45.

As shown in fig. 3 and 4, a third positioning surface 42 is disposed on a side of the mounting member 4 facing the lens barrel 1, the third positioning surfaces 42 are all circular, and the third positioning surface 42 contacts with the fourth positioning surface 22 and applies the pre-compression force to the fourth positioning surface 22, thereby fixing the lens 2 to the lens barrel 1. It will be appreciated that since the internal thread 41 is in contact with the barrel 1, the third locating surface 42 is located on the side of the internal thread 41 facing away from the barrel 1.

As shown in fig. 1, 2 and 4, a force receiving portion is disposed on a side of the mounting member 4 facing away from the lens barrel 1, and the force receiving portion is used for being connected with a locking tool. The stress part comprises a plurality of stress grooves 43 which are arranged at intervals, the locking tool is provided with a plurality of force application pieces corresponding to the stress grooves 43, one stress groove 43 is used for being clamped with one force application piece, so that the mounting piece 4 can rotate under the driving of the locking tool, the mounting piece 4 is rotated or pressed down, the locking or releasing of the mounting piece 4 is realized, and the dismounting is convenient. Alternatively, the force application member is cylindrical, and the force receiving groove 43 is provided in a cylindrical shape or a shape of a part of a cylindrical shape corresponding to the force application member. Optionally, the locking tool is a locking wrench.

As shown in fig. 3 and 4, a sealing portion 44 is disposed on a side of the mounting member 4 facing away from the lens barrel 1, the sealing portion 44 is annular, the sealing portion 44 is formed by extending a cylindrical inner sidewall of the mounting member 4 toward the center of the mounting member 4, and the sealing portion 44 is located at an edge of the inner sidewall of the mounting member 4. When the mounting portion and the lens 2 are mounted to the lens barrel 1, the sealing portion 44 contacts a side surface of the lens 2 facing away from the lens barrel 1, so that dust and moisture can be reduced from entering a gap between the lens 2 and the mount 4. And the sealing part 44 is located at a side of the third positioning surface 42 facing away from the lens barrel 1, so that it can serve as a first sealing structure to primarily block the entry of dust and moisture. Further, the inner ring side of the sealing portion 44 is tapered, so that the tip of the sealing portion 44 can be closely attached to the surface of the lens 2, thereby improving the problem that foreign matter is caught in the gap between the lens 2 and the sealing portion 44, i.e., the axial section of the sealing portion 44 is in a triangular spike shape, and the tip of the spike contacts the lens 2.

The embodiment of the utility model further provides an imaging system (not shown), which comprises a photosensitive member (not shown) and the lens module 100 as described above, wherein the lens module 100 is disposed on a photosensitive path of the photosensitive member, that is, light irradiated to the photosensitive member passes through the lens module 100 first. Specifically, the photosensitive member is located at the light-emitting end of the lens barrel 1.

According to the lens module 100 and the imaging system provided by the embodiment of the utility model, the detachable mounting piece 4 is arranged, and the lens 2 is clamped between the mounting piece 4 and the lens barrel 1, so that the lens 2 can be conveniently dismounted, and even if the lens 2 is damaged, the lens module can be simply replaced or maintained, so that the maintenance time cost and the economic cost are reduced, and the use experience of a user is improved; and because the replacement is simple and the cost is low, no additional protective lenses are needed. A positioning groove 11 is formed in the end portion of the lens barrel 1, and a first positioning surface 12 and a positioning boss 13 are arranged in the positioning groove 11, so that the position of the lens 2 can be accurately positioned, and the optical performance of the lens 2 is ensured; still be provided with seal groove 14 in the constant head tank 11 for place sealing member 3, promote sealed effect, reduce lens 2 orientation the problem that the lens can't take a photograph is led to the water smoke appears in one side of lens cone 1. The outer side wall of the light inlet end of the lens barrel 1 is provided with a step structure 15, the mounting piece 4 is mounted on the step structure 15, the mounting piece 4 is reduced to protrude out of the lens barrel 1, and the mounting piece 4 is effectively protected. The convex ring 23 is provided on the outer peripheral surface of the lens 2, so that the problem that the lens 2 is difficult to be taken out from the positioning groove 11 can be solved as a force application point when the lens 2 is removed. The mounting piece 4 is provided with a sealing part 44 on one side facing away from the lens barrel 1, so that a gap between the lens 2 and the mounting piece 4 can be preliminarily sealed, and dust and water vapor are prevented from entering.

It should be noted that the description of the present utility model and the accompanying drawings illustrate preferred embodiments of the present utility model, but the present utility model may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, which are not to be construed as additional limitations of the utility model, but are provided for a more thorough understanding of the present utility model. The above-described features are further combined with each other to form various embodiments not listed above, and are considered to be the scope of the present utility model described in the specification; further, modifications and variations of the present utility model may be apparent to those skilled in the art in light of the foregoing teachings, and all such modifications and variations are intended to be included within the scope of this utility model as defined in the appended claims.

Claims (11)

1. A lens module, comprising:

a lens barrel including a light-entering end;

the lens is arranged at the light inlet end; and

the mounting piece is detachably arranged at the light inlet end and is positioned at one side of the lens, which is away from the lens barrel, and the mounting piece is used for applying precompression to the lens, which faces the lens barrel, so as to clamp the lens between the lens barrel and the mounting piece;

the mounting piece is provided with a stress part on one side deviating from the lens barrel, and the stress part is used for being connected with a locking tool so that the mounting piece can rotate under the drive of the locking tool.

2. The lens module of claim 1, wherein the light inlet end is provided with a positioning groove, and the lens is at least partially disposed in the positioning groove.

3. The lens module according to claim 2, wherein a first positioning surface is provided on a side wall of the positioning groove, a second positioning surface is provided on an outer circumferential surface of the lens, the first positioning surface and the second positioning surface are both cylindrical, and at least one end of the first positioning surface is sleeved on the second positioning surface.

4. The lens module according to claim 2, wherein a plurality of positioning bosses are provided on a bottom surface of the positioning groove, and the positioning bosses are arranged at intervals along the bottom surface of the positioning groove to support the lens toward a side surface of the lens barrel.

5. The lens module of claim 1, wherein the force receiving portion includes a plurality of force receiving grooves arranged at intervals about a rotational direction of the mounting member, the force receiving grooves being adapted to be engaged with the locking tool.

6. The lens module of claim 1, wherein the mount is threadably coupled to the barrel.

7. The lens module of claim 1, wherein the mounting member is snap-fit with the barrel.

8. The lens module of claim 1, wherein a third positioning surface is disposed on a side of the mounting member facing the lens barrel, a fourth positioning surface is disposed on a side of the lens facing away from the lens barrel, the third positioning surface and the fourth positioning surface are both annular, and the third positioning surface contacts the fourth positioning surface and applies the pre-compression force to the fourth positioning surface.

9. The lens module of claim 1, further comprising a sealing member interposed between the lens and the barrel, the sealing member being configured to seal a space defined by the lens and the barrel.

10. The lens module of any one of claims 1 to 9, wherein the lens comprises at least one of a wide angle lens, a light reducing lens, a polarizer, an ultraviolet lens, and a diving filter.

11. An imaging system, comprising:

a photosensitive member; and

the lens module of any one of claims 1 to 10, wherein the lens module is disposed in a photosensitive path of the photosensitive member.

Images