CN219370102U - Focusing adjustment mechanism, light source module and endoscope - Google Patents
Focusing adjustment mechanism, light source module and endoscope Download PDFInfo
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- CN219370102U CN219370102U CN202320684955.8U CN202320684955U CN219370102U CN 219370102 U CN219370102 U CN 219370102U CN 202320684955 U CN202320684955 U CN 202320684955U CN 219370102 U CN219370102 U CN 219370102U
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- 230000007246 mechanism Effects 0.000 title claims abstract description 40
- 238000009434 installation Methods 0.000 claims abstract description 3
- 238000003825 pressing Methods 0.000 claims description 29
- 230000000694 effects Effects 0.000 abstract description 13
- 238000003384 imaging method Methods 0.000 abstract description 12
- 230000004907 flux Effects 0.000 abstract description 10
- 239000013307 optical fiber Substances 0.000 abstract description 8
- 238000012545 processing Methods 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 abstract description 6
- 230000002093 peripheral effect Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
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- 238000005516 engineering process Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
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Abstract
The utility model belongs to the field of medical equipment, and provides a focusing adjustment mechanism, which comprises: the bracket comprises a bracket body and an installation part arranged on the bracket body; a lens barrel provided in the mounting portion, the lens barrel being movable in the mounting portion in a direction approaching or separating from the light source; and a converging lens arranged in the lens barrel, wherein the converging lens is positioned in the light propagation direction of the light source. The utility model also provides a light source module and an endoscope. In the utility model, when the conditions of part processing errors, assembly errors and the like occur and the light emitted by the light source passes through the focusing lens and then the focused focal point passes through the front or back, the distance between the focusing lens and the light source can be adjusted by moving the lens barrel so as to adjust the position of the focused focal point of the light, thereby enabling the focused focal point to be focused on the receiving end face of the lens interface again and accurately, ensuring the luminous flux received by the optical fiber plug, ensuring the imaging effect of the endoscope and further ensuring the detection result.
Description
Technical Field
The utility model belongs to the field of medical instruments, and particularly relates to a focusing adjustment mechanism, a light source module and an endoscope.
Background
With the development of image technology and material technology, medical endoscopes are widely used in disease treatment and diagnosis. The medical endoscope can enter the human body through a natural duct of the human body or through a small incision made by operation, and can directly peep for the change of related parts.
The medical endoscope body needs to have light to illuminate tissue cells when being inserted into a human body so as to be capable of better acquiring image quality. At present, a lens plug connected with a camera is inserted into a lens interface of a medical light source to receive light, and the light is formed by focusing light emitted by the light source arranged in a medical endoscope through a converging lens.
However, in the prior art, the positions of the light source and the converging lens of the medical endoscope are fixed, and the distance between the light source and the converging lens cannot be adjusted. Because there may be errors in the processing of the parts, decentration of the optical axis may exist in the processing of the lens, and there may be errors in the assembly process, the light emitted by the light source often causes that the focused focal point passes before or after passing through the converging lens, and the light cannot be accurately converged and output to the receiving end face of the lens body interface, so that the receiving of the light by the optical fiber plug is affected, the receiving luminous flux is affected, the imaging effect is affected, and the detection result of the medical endoscope is further affected.
Disclosure of Invention
The utility model provides a focusing adjustment mechanism, which aims to solve the problem that the imaging effect is affected because the distance between a light source and a converging lens in the prior art cannot be adjusted.
In a first aspect, the present utility model provides a focus adjustment mechanism, comprising: the bracket comprises a bracket body and an installation part arranged on the bracket body;
a lens barrel provided in the mounting portion, the lens barrel being movable in the mounting portion in a direction approaching or separating from the light source; and
and the converging lens is arranged in the lens barrel and is positioned in the light propagation direction of the light source.
Optionally, a first limiting periphery is disposed on an inner wall of the mounting portion, and one end of the lens barrel away from the light source is movably disposed in the first limiting periphery.
Optionally, a first thread structure is arranged on the first limiting periphery, and the first thread structure is distributed along the light propagation direction of the light source;
the outer wall of one end of the lens cone, which is far away from the light source, is provided with a second thread structure, the second thread structure is distributed along the light propagation direction of the light source, and the first thread structure is matched with the second thread structure.
Optionally, a rotation hole is further formed on an end of the lens barrel away from the light source.
Optionally, a sliding part is arranged on the first limiting periphery, a chute is arranged on the outer wall of one end of the lens barrel, which is far away from the light source, and the sliding part is embedded in the chute in a sliding way; or (b)
The first limiting periphery is provided with a chute, the outer wall of one end of the lens barrel, which is far away from the light source, is provided with a sliding part, and the sliding part is embedded in the chute in a sliding way.
Optionally, a plurality of limiting protrusions are arranged on the first limiting periphery, a plurality of limiting grooves are arranged on the outer wall of one end, far away from the light source, of the lens cone, the plurality of limiting grooves are distributed at intervals along the light propagation direction of the light source, and the plurality of limiting protrusions are matched with the plurality of limiting grooves; or (b)
The lens barrel is characterized in that a plurality of limiting grooves are formed in the first limiting periphery, the limiting grooves are distributed at intervals along the light propagation direction of the light source, limiting protrusions are arranged on the outer wall of one end, away from the light source, of the lens barrel, and the limiting protrusions are matched with the limiting grooves.
Optionally, the converging lens includes a first lens, a second lens and a third lens sequentially arranged along a light propagation direction of the light source, and the second lens and the third lens are arranged in parallel;
the two ends of the lens barrel are respectively provided with a first opening and a second opening, the first opening is closer to the light source than the second opening, the first lens is arranged at the first opening, and the third lens is arranged at the second opening.
Optionally, the first lens, the second lens and the third lens have different mirror curvatures.
Optionally, the focusing adjustment mechanism further includes a first pressing ring and a second pressing ring, the first pressing ring is disposed on the lens barrel and presses the first lens on the first opening, the second pressing ring is disposed in the lens barrel and presses the second lens on the third lens and presses the third lens on the second opening.
Optionally, a first sinking table, a second limiting periphery, a second sinking table and a third sinking table are sequentially arranged on the inner wall of the lens barrel at intervals along the light propagation direction of the light source, and the first sinking table and the third sinking table are respectively positioned at two ends of the lens barrel;
the first opening is an opening of the first sinking table, and the first pressing ring presses the first lens on the first sinking table;
the second opening is an opening of the third sinking table, the third lens is embedded on the third sinking table, and the second pressing ring is positioned between the second limiting periphery and the second sinking table and presses the second lens on the third lens.
In a second aspect, the present utility model provides a light source module, including: a light source; and the focusing adjusting mechanism is arranged in the light propagation direction of the light source, and the converging lens corresponds to the light source.
In a third aspect, the present utility model provides an endoscope comprising: a body; and the light source module is arranged on the machine body.
In the focusing adjustment mechanism, the lens barrel can move in the bracket towards the direction close to or far from the light source, so that the distance between the converging lens in the lens barrel and the light source is adjustable, when the conditions of part processing errors, assembly errors and the like occur, and the light emitted by the light source passes through the converging lens and then the focused focus passes before or after, the distance between the converging lens and the light source can be adjusted by moving the lens barrel so as to adjust the position of the focused focus of the light, further the focused focus is converged and output to the receiving end face of the lens body interface again and accurately, the luminous flux received by the optical fiber plug is ensured, the imaging effect of the endoscope is ensured, and the accuracy of a detection result is further ensured.
Drawings
FIG. 1 is a schematic view of a focus adjustment mechanism according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of a split structure of a focus adjustment mechanism according to an embodiment of the present utility model;
FIG. 3 is a schematic cross-sectional view of a focus adjustment mechanism according to an embodiment of the present utility model;
FIG. 4 is a schematic cross-sectional view of a focus adjustment mechanism according to another embodiment of the present utility model;
FIG. 5 is a schematic cross-sectional view of a focus adjustment mechanism according to another embodiment of the present utility model;
fig. 6 is a schematic diagram of a split structure of a lens barrel and a converging lens according to an embodiment of the present utility model;
fig. 7 is a schematic view of a split structure of another angle of the lens barrel and the converging lens according to the embodiment of the present utility model;
fig. 8 is a schematic structural view of a lens barrel according to an embodiment of the present utility model;
fig. 9 is a schematic view of another angle of the lens barrel according to the embodiment of the present utility model;
fig. 10 is a schematic structural diagram of a light source assembly according to an embodiment of the present utility model.
Description of main reference numerals:
the focusing mechanism comprises a focusing adjusting mechanism-100, a bracket-1, a frame body-11, a mounting part-12, a first limiting periphery-121, a first threaded structure-1211, a sliding part-1212, a limiting protrusion-1213, a lens barrel-2, an outer wall-21, a second threaded structure-211, a second limiting periphery-214, a rotating hole-22, a sliding groove-212, a limiting groove-213, a first opening-25, a first clamping ring-251, a second opening-26, a second clamping ring-261, a first sinking table-27, a second sinking table-28, a third sinking table-29, a converging lens-3, a first lens-31, a second lens-32, a third lens-33, a light source module-200, a light source-201 and a base-202.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model. Furthermore, 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 present utility model.
According to the technical scheme, through improving the connection relation between the bracket and the lens barrel, when the focusing focus is beyond the front or the rear due to the processing error, the assembly error and the like of parts, the distance between the focusing lens and the light source can be adjusted by moving the lens barrel, so that the focusing focus is accurately focused on the receiving end face of the lens body interface again, the luminous flux received by the optical fiber plug is ensured, and the imaging effect of the endoscope is further ensured.
Example 1
Referring to fig. 1 and 2, a focus adjustment mechanism 100 according to an embodiment of the present utility model includes a holder 1, a lens barrel 2, and a converging lens 3. The holder 1 includes a holder body 11 and a mounting portion 12 provided on the holder body 11, the lens barrel 2 is provided in the mounting portion 12, the collective lens 3 is provided in the lens barrel 2 in the light source propagation direction, and the lens barrel 2 is movable in the mounting portion 12 in a direction approaching or separating from the light source 201.
The focusing adjustment mechanism 100 provided in this embodiment is mainly used in a medical endoscope, where light emitted from a light source can be irradiated into a converging lens 3, and the light can be focused by the converging lens 3, and the focused light is output to a receiving end face of the endoscope. However, in some cases, such as machining errors of parts, decentration of optical axes of lenses, errors in assembly process, etc., the focal point of the light converged by the converging lens 3 may be deviated, and the flux of the received light outputted from the focused light to the receiving end surface is insufficient, thereby affecting the imaging effect of the medical endoscope.
When the light emitted by the light source passes through the focusing lens 3 and then the focused focal point passes through the front or back, the lens barrel 2 of the embodiment can move in the direction of approaching or separating from the light source at the mounting part 12, and the distance between the lens barrel 2 and the light source can be adjusted by adjusting the distance between the focusing lens 3 and the light source, so that the position of the focused focal point after the light emitted by the light source passes through the focusing lens 3 can be adjusted, and the focal point is on the receiving end surface of the endoscope.
In other words, the present embodiment ensures the light flux received by the optical fiber plug by moving the lens barrel 2 in the mounting portion 12 of the holder 1 in the direction approaching or separating from the light source, so that the focused focal point of the light emitted from the light source after passing through the position-adjustable converging lens 3 is output at the lens body interface receiving end surface, so as to ensure the imaging effect of the medical endoscope having the focus adjusting mechanism 100.
Example two
The present embodiment provides a focus adjustment mechanism 100, which, on the basis of the first embodiment, has the following design:
with continued reference to fig. 2, a first limiting edge 121 may be disposed on an inner wall of the mounting portion 12, and an end of the lens barrel 2 away from the light source is movably disposed in the first limiting edge 121. In an embodiment, the inner diameter of the first limiting peripheral edge 121 is smaller than the outer diameter of the lens barrel 2, when the lens barrel 2 is embedded into the mounting portion 12, the outer wall 21 of the lens barrel 2 abuts against the inner wall of the first limiting peripheral edge 121, so as to prevent the lens barrel 2 from moving in the mounting portion 12 in a direction away from the light source, and the first limiting peripheral edge 121 limits the lens barrel 2, so as to ensure that the lens barrel 2 cannot be separated from the mounting portion 12.
Example III
The present embodiment provides a focus adjustment mechanism 100, which is further designed based on the second embodiment:
referring to fig. 3, a first thread structure 1211 may be disposed on the first limiting periphery 121, and a second thread structure 211 may be disposed on an outer wall 21 of an end of the lens barrel 2 away from the light source, where the first thread structure 1211 and the second thread structure 211 may be engaged with each other.
When the first thread structure 1211 and the second thread structure 211 are matched with each other, the first thread structure 1211 and the second thread structure 211 can relatively move by rotating the lens barrel 2, and then the lens barrel 2 can move relative to the mounting part 12, the distance between the converging lens 3 and the light source is changed, the focus of the light emitted by the light source after passing through the converging lens 3 is moved, when the focus moves to the receiving end face of the lens body interface, the light flux which can be received by the optical fiber plug is the highest, and the imaging effect of the medical endoscope with the focusing adjusting mechanism 100 is ensured.
Specifically, the first screw structures 1211 may be distributed along the light propagation direction of the light source, and the second screw structures 211 may be distributed along the light propagation direction of the light source, with the same distribution direction. The first thread structure 1211 and the second thread structure 211 have the same profile, and the profiles of the first thread structure 1211 and the second thread structure 211 may be one of triangle, trapezoid, zigzag, circular arc, or rectangle. The first thread structure 1211 and the second thread structure may each be left-handed threads or right-handed threads.
In this embodiment, by providing the first screw structure 1211 on the inner wall of the mounting portion 12 and providing the second screw structure 211 on the outer wall 21 of the lens barrel 2, the lens barrel 2 can relatively move in the mounting portion 12, and further, the distance between the converging lens 3 and the light source is changed, the distance of the lens barrel 2 relatively moving in the mounting portion 12 can be precisely controlled by the arrangement of the first screw structure 1211 and the second screw structure 211, and meanwhile, stable connection between the lens barrel 2 and the mounting portion 12 is ensured.
Further, the lens barrel 2 may be further provided with a rotation hole 22.
The rotation hole 22 is disposed at one end of the lens barrel 2 far away from the light source, and when the position of the lens barrel 2 needs to be adjusted, a screwdriver or other tools are inserted into the rotation hole 22 to drive the lens barrel 2 to rotate, so that the lens barrel 2 moves relative to the mounting portion 12. Since the lens barrel 2 is embedded in the mounting portion 12, the rotation hole 22 is provided to facilitate manual operation to rotate the lens barrel 2, so that the lens barrel 2 and the mounting portion 12 relatively move to adjust the position of the focal point where the light emitted by the light source passes through the converging lens 3.
In an embodiment, two rotation holes 22 may be provided, and the two rotation holes 22 are disposed opposite to each other with the center of the lens barrel 2. The lens barrel 2 can be rotated by inserting into the two rotation holes 22 using a screwdriver or other tool. When the lens barrel 2 needs to be rotated, the two rotating holes 22 can balance the stress of the lens barrel 2, so that the accurate operation is convenient.
Example IV
The present embodiment provides a focus adjustment mechanism 100, which is further designed based on the second embodiment:
referring to fig. 4, a sliding portion 1212 may be disposed on the first limiting peripheral edge 121, a sliding groove 212 may be disposed on an outer wall 21 of an end of the lens barrel 2 away from the light source 201, and the sliding portion 1212 may be embedded in the sliding groove 212 and may slide in the sliding groove 212. When the sliding portion 1212 slides in the slide groove 212, the lens barrel 2 can move relative to the mounting portion 12, and the distance between the converging lens 3 and the light source is changed, so that the focal point focused by the light emitted by the light source after passing through the converging lens 3 moves.
Specifically, the sliding portion 1212 is disposed on the first limiting peripheral edge 121 in a protruding manner, and a cross section of the sliding portion 1212 may be circular arc, square, rectangle, triangle, trapezoid, or the like. The sliding groove 212 is concavely arranged on the outer wall 21 of the lens barrel 2, the sliding groove 212 is concaved towards the lens barrel 2 to form a concave part, and the concave part can accommodate the sliding part 1212, so that the part of the lens barrel 2, on which the sliding part 1212 is not arranged, is abutted with the part of the mounting part 12, on which the sliding groove 212 is not arranged.
In an embodiment, the first limiting periphery 121 may be provided with a sliding groove 212, and the outer wall 21 of the end of the lens barrel 2 away from the light source 201 is provided with a sliding portion 1212, and the sliding portion 1212 may be embedded in the sliding groove 212 and may slide in the sliding groove 212. When the sliding portion 1212 slides in the slide groove 212, the lens barrel 2 can move relative to the mounting portion 12, and the distance between the converging lens 3 and the light source is changed, so that the focal point focused by the light emitted by the light source after passing through the converging lens 3 moves. The sliding portion 1212 and the chute 212 are the same as described above, and are not described in detail herein.
Further, since the surface of the sliding portion 1212 and the surface of the chute 212 are in contact with each other and have a certain friction force. Preferably, a certain damping between the sliding portion 1212 and the chute 212 can be generated by adjusting the materials of the surfaces of the sliding portion 1212 and the chute 212. The specific size of the damping can be set according to actual requirements, and is not limited herein.
By providing damping between the sliding portion 1212 and the sliding slot 212, the relative movement between the sliding portion 1212 and the sliding slot 212 can be more gentle, and the relative movement between the lens barrel 2 and the mounting portion 12 can be more gentle, and the lens barrel 2 can be more precisely controlled to move between the mounting portions 12, which is beneficial to fine-tuning the position of the focal point where the light emitted by the light source is focused after passing through the converging lens 3.
Example five
The present embodiment provides a focus adjustment mechanism 100, which is further designed based on the second embodiment:
referring to fig. 5, a plurality of limiting protrusions 1213 may be disposed on the first limiting periphery 121, a plurality of limiting grooves 213 may be disposed on an outer wall 21 of one end of the lens barrel 2 away from the light source, the limiting protrusions 1213 are adapted to the limiting grooves 213, and the limiting protrusions 1213 may be embedded into the limiting grooves 213 and fixed relatively, so that the lens barrel 2 and the mounting portion 12 are fixed relatively.
It should be noted that, the depth of the limiting groove 24 is shallow, the height of the limiting protrusion 1213 is also small, and the limiting protrusion 1213 may be disengaged from the limiting groove 213 by applying an external force on the lens barrel. As the lens barrel 2 continues to move relative to the mounting portion 12, the limiting projection 1213 may be fitted into the other limiting groove 213, so that the lens barrel 2 and the mounting portion 12 are relatively fixed.
In other words, the present embodiment makes the limiting protrusion 1213 separate from or fix in the plurality of limiting grooves 213 by applying an external force on the lens barrel 2, so that the distance between the converging lens 3 and the light source is changed, and the focal point focused by the light source is moved after the light emitted by the light source passes through the converging lens 3. In addition, the distance between each of the limiting grooves 24 may be set according to the requirement, and when an external force is applied to the lens barrel 2, the moving distance of the lens barrel 2 relative to the mounting portion 12 is small, so as to achieve the purpose of precisely controlling the moving distance of the lens barrel 2.
In one embodiment, the first limiting periphery 121 may be provided with a plurality of limiting grooves 213, and the outer wall 21 of the end of the lens barrel 2 away from the light source may be provided with a plurality of limiting protrusions 1213. The limiting protrusion 1213 is adapted to the limiting groove 213, and the limiting protrusion 1213 may be embedded into the limiting groove 213 and relatively fixed, so that the lens barrel 2 and the mounting portion 12 are relatively fixed. When an external force is applied to the lens barrel 2, the stopper projection 1213 is disengaged from the stopper groove 213. As the lens barrel 2 continues to move relative to the mounting portion 12, the limiting projection 1213 may be fitted into the other limiting groove 213, so that the lens barrel 2 and the mounting portion 12 are relatively fixed.
In this embodiment, by providing the first limiting peripheral edge 121 of the mounting portion 12 and the limiting protrusion 1213 and the limiting groove 213 on the lens barrel 2, the lens barrel 2 and the mounting portion 12 can be fixed at different relative positions, so as to adjust the distance between the converging lens 3 and the light source, and further adjust the focal position of the light emitted by the light source after passing through the converging lens 3.
Example six
The present embodiment provides a focus adjustment mechanism 100, which, on the basis of the first embodiment, has the following design:
referring to fig. 6-9, the converging lens 3 includes a first lens 31, a second lens 32 and a third lens 33 sequentially arranged along the propagation direction of the light source, and the light emitted from the light source is focused to form a focal point after passing through the first lens 31, the second lens 32 and the third lens 33. The second lens 32 and the third lens 33 are arranged in parallel, the first lens 31, the second lens 32 and the third lens 33 may be concave-convex lenses, and the mirror curvatures of the first lens 31, the second lens 32 and the third lens 33 are different, so that a specific light path is formed by the combination of the three lenses, and the imaging requirement of the focusing adjustment mechanism 100 is met.
Specifically, the lens barrel 2 is provided with a first opening 25 and a second opening 26 at both ends thereof, the first opening 25 being closer to the light source than the second opening 26, the first lens 31 being provided at the first opening 25, the convex surface of the first lens 31 being abutted against the first opening 25. The third lens 33 is disposed at the second opening 26, and the concave surface of the third lens 33 abuts against the second opening 26. The concave surface of the second lens 32 abuts against the convex surface of the third lens 33. The first lens element 31, the second lens element 32 and the third lens element 33 can be fixed at the corresponding positions by dispensing.
In this embodiment, by arranging the first lens 31, the second lens 32 and the third lens 33, the converging effect of the light emitted by the light source is better after passing through the converging lens 33, the light range is improved, and the light loss is reduced.
Example seven
The present embodiment provides a focus adjustment mechanism 100, which has the following design based on the sixth embodiment:
with continued reference to fig. 6-9, the lens barrel 2 may further include a first pressing ring 251 and a second pressing ring 261, where the first pressing ring 251 is disposed on the lens barrel 2, and presses the first lens 31 against the first opening 25, and the second pressing ring 261 is disposed on the lens barrel 2, presses the second lens 32 against the third lens 33, and presses the third lens 33 against the second opening 26.
Since the materials of the first lens 31, the second lens 32 and the third lens 33 are different from the materials of the lens barrel 2, and a certain gap exists between the lens barrel and the first lens 31, the second lens 32 and the third lens 33, the connection between the first lens 31, the second lens 32 and the third lens 33 and the lens barrel 2 can be more stable by arranging the first pressing ring 251 and the second pressing ring 261.
Specifically, the diameter of the first pressing ring 251 may be greater than that of the first lens 31, the first lens 31 abuts against the first opening 25, and the first pressing ring 251 covers the first lens 31 and is fixedly connected with the edge of the first opening 25, so that the first lens 31 is pressed against the first opening 25. The diameter of the second pressing ring 261 may be larger than the diameters of the second lens 32 and the third lens 33, the second lens 32 is abutted against the third lens 33, and the second pressing ring 261 covers the second lens 32 and is fixedly connected with the edge of the second opening 26, so that the second lens 32 is pressed on the third lens 33, and the third lens 33 is pressed on the second opening 26.
In an embodiment, the first pressing ring 251 and the second pressing ring 261 may be provided with threads, and friction force between the contact surfaces of the first pressing ring 251 and the second pressing ring 261 with the first lens 31, the second lens 32, the first opening 25 and the second opening 26 may be increased by the threads, so that the connection between the first lens 31, the second lens 32 and the third lens 33 and the lens barrel 2 is more stable.
In this embodiment, by setting the first pressing ring 251 and the second pressing ring 261, the first lens 31, the second lens 32, and the third lens 33 can be stably connected with the lens barrel 2, so that the fixing of the positions of the first lens 31, the second lens 32, and the third lens 33 is ensured, the problem that the light cannot be focused due to the change of the three is avoided, the converging effect of the light passing through the converging lens 3 is ensured, and the light loss is reduced.
Further, the inner wall of the lens barrel 2 may further be provided with a first sinking stage 27, a second limiting peripheral edge 214, a second sinking stage 28 and a third sinking stage 29.
The first sinking platform 27 is disposed at one end of the lens barrel 2 where the first opening 25 is located, and the first pressing ring 251 can press the first lens 31 onto the first sinking platform 27. At least a portion of the first lens 31 protrudes from the first presser ring 251 to the lens barrel 2. The second sinking platform 28 is arranged on the inner wall of the lens barrel 2, one end of the second pressing ring 261 abuts against the second limiting periphery 214, the second sinking platform 28 is sleeved on the third lens 33, and one end of the second pressing ring 261, which is away from the second limiting periphery 214, abuts against the second lens 32 and the second sinking platform 28, so that the second lens 32 is pressed on the third lens 33. The third sinking stage 29 is disposed at one end of the lens barrel 2 where the second opening 26 is located, and the third lens 33 is embedded on the third sinking stage 29.
In the present embodiment, the first lens 31, the second lens 32, and the third lens 33 can be stably connected to the lens barrel 3 by providing the first stage 27, the second limiting peripheral edge 214, the second stage 28, and the third stage 29, and the intervals between the first lens 31, the second lens 32, and the third lens 33 can be adjusted by adjusting the sizes of the first stage 27, the second limiting peripheral edge 214, the second stage 28, and the third stage 29, and the intervals between the first lens 31, the second lens 32, and the third lens 33 can be defined as needed, which is not limited herein.
Example eight
Referring to fig. 9, a light source module 200 according to an embodiment of the utility model includes a light source 201 and a focus adjustment mechanism 100 provided in the above embodiment. Wherein the focus adjustment mechanism 100 is arranged in the light propagation direction of the light source 201 such that the converging lens 3 corresponds to the light source 201. When the light emitted from the light source 201 is irradiated to the focus adjustment mechanism 100, the light is irradiated to the condensing lens 3, and the condensing lens 3 condenses the light.
In the light source module 200 of the utility model, as the lens barrel 2 can move in the bracket 1 towards the direction approaching or far away from the light source 201, the distance between the converging lens 3 in the lens barrel 2 and the light source 201 is adjustable, when the conditions of part processing errors, assembly errors and the like occur, and the light emitted by the light source 201 passes through the front or rear focused focus after passing through the converging lens 3, the distance between the converging lens 3 and the light source can be adjusted by moving the lens barrel 2 so as to adjust the position of the focused focus of the light, so that the focused focus can be converged and output to the receiving end face of the lens body interface again and accurately, the light flux received by the optical fiber plug is ensured, the imaging effect of the endoscope is ensured, and the detection result is ensured.
In an embodiment, the light source module 200 may further include a fixing plate 202, the focus adjustment structure 100 is fixedly connected to the fixing plate 202, and the light source 201 is fixedly connected to the fixing plate 202, so that the focus adjustment structure 100 may be disposed in a light propagation direction of the light source 201.
Example nine
The endoscope of the embodiment of the utility model comprises the light source module 200 provided by the embodiment of the engine body 301, wherein the light source module 200 is arranged on the engine body 301 and is used for providing a light source with sufficient luminous flux for a detection assembly of the endoscope so as to ensure the imaging effect of the endoscope.
In the endoscope, as the lens barrel 2 can move in the bracket 1 towards the direction approaching or far away from the light source 201, the distance between the converging lens 3 in the lens barrel 2 and the light source 201 is adjustable, when the conditions of part processing errors, assembly errors and the like occur and the light emitted by the light source 201 passes through the front or rear focused focus after passing through the converging lens 3, the distance between the converging lens 3 and the light source can be adjusted by moving the lens barrel 2 so as to adjust the position of the focused focus of the light, the focused focus can be converged and output to the receiving end face of the lens interface again and accurately, the light flux received by the optical fiber plug is ensured, the imaging effect of the endoscope is ensured, and the detection result is further ensured.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (12)
1. A focus adjustment mechanism, comprising:
the bracket comprises a bracket body and an installation part arranged on the bracket body;
a lens barrel provided in the mounting portion, the lens barrel being movable in the mounting portion in a direction approaching or separating from the light source; and
and the converging lens is arranged in the lens barrel and is positioned in the light propagation direction of the light source.
2. The focus adjustment mechanism according to claim 1, wherein a first limit periphery is provided on an inner wall of the mounting portion, and an end of the lens barrel remote from the light source is movably provided in the first limit periphery.
3. The focus adjustment mechanism according to claim 2, wherein a first thread structure is provided on the first limit periphery, the first thread structure being distributed along a light propagation direction of the light source;
the outer wall of one end of the lens cone, which is far away from the light source, is provided with a second thread structure, the second thread structure is distributed along the light propagation direction of the light source, and the first thread structure is matched with the second thread structure.
4. A focus adjustment mechanism according to claim 3, wherein the lens barrel is further provided with a rotation hole at an end thereof remote from the light source.
5. The focus adjustment mechanism according to claim 2, wherein a sliding portion is provided on the first limit periphery, a sliding groove is provided on an outer wall of an end of the lens barrel away from the light source, and the sliding portion is slidably embedded in the sliding groove; or (b)
The first limiting periphery is provided with a chute, the outer wall of one end of the lens barrel, which is far away from the light source, is provided with a sliding part, and the sliding part is embedded in the chute in a sliding way.
6. The focus adjustment mechanism according to claim 2, wherein a plurality of limit protrusions are arranged on the first limit periphery, a plurality of limit grooves are arranged on an outer wall of one end of the lens barrel away from the light source, the plurality of limit grooves are distributed at intervals along the light propagation direction of the light source, and the plurality of limit protrusions are matched with the plurality of limit grooves; or (b)
The lens barrel is characterized in that a plurality of limiting grooves are formed in the first limiting periphery, the limiting grooves are distributed at intervals along the light propagation direction of the light source, a plurality of limiting protrusions are arranged on the outer wall of one end, away from the light source, of the lens barrel, and the limiting protrusions are matched with the limiting grooves.
7. The focus adjustment mechanism according to claim 1, wherein the converging lens includes a first lens, a second lens, and a third lens arranged in order along a light propagation direction of the light source, the second lens being juxtaposed with the third lens;
the two ends of the lens barrel are respectively provided with a first opening and a second opening, the first opening is closer to the light source than the second opening, the first lens is arranged at the first opening, and the third lens is arranged at the second opening.
8. The focus adjustment mechanism of claim 7, wherein the first lens, the second lens, and the third lens have different mirror curvatures.
9. The focus adjustment mechanism of claim 7, further comprising a first press ring disposed on the barrel and pressing the first lens against the first opening, and a second press ring disposed within the barrel and pressing the second lens against the third lens and the third lens against the second opening.
10. The focus adjustment mechanism according to claim 9, wherein a first sinking table, a second limiting periphery, a second sinking table and a third sinking table are sequentially arranged on the inner wall of the lens barrel at intervals along the light propagation direction of the light source, and the first sinking table and the third sinking table are respectively positioned at two ends of the lens barrel;
the first opening is an opening of the first sinking table, and the first pressing ring presses the first lens on the first sinking table;
the second opening is an opening of the third sinking table, the third lens is embedded on the third sinking table, and the second pressing ring is positioned between the second limiting periphery and the second sinking table and presses the second lens on the third lens.
11. A light source module, comprising:
a light source; and
the focus adjustment mechanism according to any one of claims 1 to 10, which is provided in a light propagation direction of the light source, the converging lens corresponding to the light source.
12. An endoscope, comprising:
a body; and
the light source module of claim 11, wherein the light source module is disposed on the body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320684955.8U CN219370102U (en) | 2023-03-24 | 2023-03-24 | Focusing adjustment mechanism, light source module and endoscope |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320684955.8U CN219370102U (en) | 2023-03-24 | 2023-03-24 | Focusing adjustment mechanism, light source module and endoscope |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116840997A (en) * | 2023-08-30 | 2023-10-03 | 北京妙想科技有限公司 | Optical imaging system based on light source and lens common adjustment |
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- 2023-03-24 CN CN202320684955.8U patent/CN219370102U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116840997A (en) * | 2023-08-30 | 2023-10-03 | 北京妙想科技有限公司 | Optical imaging system based on light source and lens common adjustment |
| CN116840997B (en) * | 2023-08-30 | 2023-11-03 | 北京妙想科技有限公司 | Optical imaging system based on light source and lens common adjustment |
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