Optical debugging tool for lens

Abstract

The utility model discloses an optical debugging tool for a lens. Comprising a bottom plate, a focusing fixing seat arranged on the bottom plate in a sliding mode, a clamp arranged on the focusing fixing seat and a lens support arranged on the bottom plate and provided with a lens installation position, and the clamp comprises a side plate, an upper clamping plate and a lower clamping plate, the upper clamping plate and the lower clamping plate are connected to the side plates and define a C-shaped clamping cavity suitable for clamping a detector, a notch of the C-shaped clamping cavity right faces the lens mounting position, the upper clamping plate and / or the lower clamping plate are / is provided with first threaded mounting holes used for being connected with a detector shell through screws, and the axial direction of the first threaded mounting holes is parallel to the vertical direction. The notch of the C-shaped clamping cavity of the clamp directly faces the lens mounting position, and the axial direction of the first threaded mounting hole of the clamping plate is parallel to the vertical direction, so that the inclination included angle of an image plane can be ensured to be within a design range when the detector is clamped, the problem of inclination of the image plane of the detector is avoided, an imaging clear point can be quickly found to realize quick focusing, and the focusing efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of optical technology, and in particular to a lens optical adjustment fixture. Background Technology

[0002] With the development of infrared thermal imaging technology, the application environments of infrared thermal imagers have become more extensive. To cope with complex environmental temperature changes, athermalization designs must meet optical performance requirements across all temperature environments, including active and passive athermalization. Active athermalization requires focusing compensation using electrically driven or manually adjustable mechanisms, which is challenging to design and involves complex assembly processes, making it unsuitable for mass production. Passive athermalization systems, on the other hand, achieve temperature compensation through the combination of various optical and structural materials with different properties. They are characterized by simple structure and high assembly efficiency, making them more suitable for mass production. One of the key aspects of optical adjustment for passive athermalization lenses is adjusting the detector image plane to the optimal position across the entire temperature range, while ensuring that the tilt angle of the detector image plane remains within the theoretical design range, so that the image output by the thermal imager remains clear at all times.

[0003] Existing passive athermalized lens optical adjustment fixtures suffer from low efficiency due to the difficulty in adjusting the detector image plane tilt angle within the design range. For example, patent CN 221550986U discloses a lens back focal length adjustment structure, including a base, a sliding translation component slidably connected to the base, and a positioning bracket for fixing the detector component. The positioning bracket is vertically mounted on the sliding translation component and includes a first clamping plate and a second clamping plate. C-shaped grooves are formed on the sides of the first and second clamping plates, serving as the first limiting part for upper-limiting the detector component. The detector component is engaged and limited within the C-shaped groove. However, when the detector component is engaged into the C-shaped groove, it may not be fully engaged, causing the detector component to shift and affecting the image plane tilt angle, thus impacting the lens optical adjustment accuracy and efficiency. Therefore, a lens optical adjustment fixture is urgently needed to solve these problems. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a lens optical adjustment fixture, comprising a base plate, a focusing fixing seat slidably disposed on the base plate, a clamp disposed on the focusing fixing seat, and a lens support disposed on the base plate and having a lens mounting position. The sliding direction of the focusing fixing seat is parallel to the lens axis defined by the lens mounting position. The clamp includes a side plate and an upper clamping plate and a lower clamping plate, both of which are parallel to the horizontal plane. The upper clamping plate and the lower clamping plate are connected to the upper and lower ends of the side plate respectively and enclose a C-shaped clamping cavity suitable for clamping a detector. The slot of the C-shaped clamping cavity faces the lens mounting position. The upper clamping plate and / or the lower clamping plate are provided with a first threaded mounting hole for screw connection with the detector housing, and the axis of the first threaded mounting hole is parallel to the vertical.

[0005] Furthermore, the distance between the upper clamping plate and the lower clamping plate is adjustable.

[0006] Furthermore, the focusing fixture is provided with a plurality of clamps, and the focusing fixture is selectively connected to one of the clamps.

[0007] Furthermore, the first threaded mounting hole is an oblong hole, the length direction of which is parallel to the longitudinal direction, and the longitudinal direction is perpendicular to the sliding direction of the focusing fixing seat.

[0008] Furthermore, the position of the clamp on the focusing mounting base is adjustable and the adjustment direction is parallel to the vertical direction.

[0009] Furthermore, it also includes a sliding translation component and a driving unit. The sliding translation component is disposed on the base plate, the focusing fixing seat is disposed on the sliding translation component, and the output end of the driving unit is connected to the focusing fixing seat.

[0010] Furthermore, the sliding translation assembly includes a slide rail and an adapter, the slide rail is disposed on the base plate, the adapter is disposed on the slide rail, and the focusing fixing seat is disposed on the adapter.

[0011] Furthermore, it also includes an adapter seat, which is disposed on the base plate, and the sliding translation component and the drive unit are both disposed on the adapter seat.

[0012] Furthermore, the drive unit includes a piezoelectric actuator, which is mounted on the base plate via an actuator support.

[0013] Furthermore, the position of the actuator support on the base plate is adjustable and the adjustment direction is parallel to the lateral direction, which is parallel to the sliding direction of the focusing fixing seat.

[0014] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0015] 1) The lens optical adjustment fixture provided by this utility model has a lens bracket and a focusing fixing seat on the base plate. The focusing fixing seat is slidably mounted on the base plate and has a clamp with a C-shaped clamping cavity for holding the detector. The slot of the C-shaped clamping cavity is aligned with the lens mounting position of the lens bracket. The detector is connected to the clamping plate of the clamp by bolts, and the axis of the first threaded mounting hole on the clamping plate is parallel to the vertical. This ensures that the image plane tilt angle is within the design range during the detector clamping process, avoids the problem of detector image plane tilt, and can quickly find the clear imaging point to achieve rapid focusing and improve focusing efficiency.

[0016] 2) The lens optical adjustment fixture provided by this utility model has waist-shaped holes on the upper clamping plate and / or the lower clamping plate, which can realize the fine adjustment of the detector in the longitudinal direction. The position of the fixture on the focusing fixing seat is adjustable, and the adjustment direction is parallel to the vertical direction. The position of the detector can be adjusted in the longitudinal and vertical directions, which can effectively eliminate the tolerance of structural parts and keep the detector and lens coaxial.

[0017] 3) The lens optical adjustment fixture provided by this utility model can be replaced with a suitable clamp according to the type of optical imaging component to be focused, so as to realize the universality of the fixture. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the lens optical adjustment fixture provided by this utility model;

[0020] Figure 2 Exploded view of the lens optical adjustment fixture provided by this utility model;

[0021] Figure 3 A schematic diagram illustrating the use of the lens optical adjustment fixture provided by this utility model.

[0022] 1-Lens; 2-Detector assembly; 3-Base plate; 31-Mounting slot; 4-Sliding translation assembly; 41-Slide rail; 42-Adapter; 5-Lens bracket; 6-Clamp; 61-Upper clamp; 62-Lower clamp; 63-Mounting part; 64-First threaded mounting hole; 7-Drive unit; 71-Actuator support; 8-Adapter; 81-Second threaded mounting hole; 82-Third threaded mounting hole; 9-Focusing fixing seat; 91-Fourth threaded mounting hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. In the accompanying drawings, the dimensions and relative dimensions of certain parts may be enlarged for clarity.

[0024] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "connected" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0025] In the description of this utility model, the terms "upper", "lower", "left", "right", "front", "back", "center", "horizontal", "vertical", "top", "bottom", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, in the description of this utility model, the terms "first" and "second" are used merely for descriptive distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Additionally, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0027] As per the instruction manual Figure 1 and 2As shown, this utility model provides a lens optical adjustment fixture, including a base plate 3, a focusing fixing seat 9 slidably disposed on the base plate 3, a clamp 6 disposed on the focusing fixing seat 9, and a lens bracket 5 disposed on the base plate 3 and having a lens mounting position. The sliding direction of the focusing fixing seat 9 is parallel to the lens axis defined by the lens mounting position. The clamp 6 includes a side plate and an upper clamping plate 61 and a lower clamping plate 62, both of which are parallel to the horizontal plane. The upper clamping plate 61 and the lower clamping plate 62 are vertically connected to the upper and lower ends of the side plate and enclose a C-shaped clamping cavity suitable for clamping a detector 2. The slot of the C-shaped clamping cavity faces the lens mounting position. The upper clamping plate 61 and / or the lower clamping plate 62 are provided with a first threaded mounting hole 64 for screw connection with the detector housing. The axis of the first threaded mounting hole 64 is parallel to the vertical.

[0028] Specifically, this embodiment uses lens back focal length adjustment as an example for detailed explanation. The lens bracket 5 is mounted on the base plate 3, the lens 1 is set in the lens mounting position, and the clamp 6 is set on one side of the lens bracket 5. The clamp 6 is slidably mounted on the base plate 1 via a focusing fixing seat 9. The focusing fixing seat 9 can drive the clamp 6 to move along the lens axis parallel to the lens mounting position to move closer to or away from the lens. As per the appendix to the specification. Figure 3 As shown, during use, the lens bracket 5 is vertically mounted on the base plate 3. After the lens 1 is fixed on the lens bracket 5, the axis of the lens 1 is parallel to the horizontal direction. The detector 2 is mounted on the clamp 6. The C-shaped clamping cavity of the clamp 6 is directly facing the lens mounting position. The upper clamping plate 61 and / or the lower clamping plate 62 are provided with a first threaded mounting hole 64. The detector housing is mounted on the first threaded mounting hole 64 by bolts. The axis of the first threaded mounting hole 64 is parallel to the vertical direction, which can ensure that the detector image plane tilt angle is within the set range and avoid the back cutoff adjustment of the lens due to the detector image plane tilt angle. After installation, detector 2 works with lens 1 to align with the collimator for back focus adjustment. Focusing mount 9 slides on base plate 3 to achieve parallel movement of detector 2. During the movement, the optimal imaging point of the lens is found. After confirmation, the travel value of focusing mount 9 is recorded. Back focus adjustment of the same type of optical lens can be completed. The back focus adjustment process of optical lens is fully quantified, which can reduce the difficulty of adjustment, improve the efficiency of adjustment, and allow for quick adjustment without the need for experienced operators, thus reducing the requirements for operators.

[0029] In an optimized implementation, the side plate is provided with a mounting part 63, which is connected to the focusing fixing base 9. In this embodiment, the lower clamping plate 62 and the side plate form an integral L-shaped plate, the upper clamping plate 61 is disposed at the end of the side plate away from the lower clamping plate 62, the detector 2 is fixed between the upper clamping plate 61 and the lower clamping plate 62, and the clamp 6 is mounted on the focusing fixing base 9 through the mounting part 63.

[0030] In an optimized implementation, the distance between the upper clamping plate 61 and the lower clamping plate 62 is adjustable. Specifically, the upper clamping plate 61 is bolted to the side plate, and the side plate has a waist-shaped hole with the length direction of the waist-shaped hole parallel to the vertical. Therefore, the installation position of the upper clamping plate 61 on the side plate is adjustable, thereby adjusting the distance between the upper clamping plate 61 and the lower clamping plate 62 to meet the needs of different models of detectors 2.

[0031] In an optimized implementation, the first mounting hole 64 is an oblong hole, the length of which is parallel to the longitudinal direction, and the longitudinal direction is perpendicular to the sliding direction of the focusing mounting base 9. The horizontal position of the detector 2 can be finely adjusted using the upper clamping plate 61 and the lower clamping plate 62, effectively eliminating tolerances in structural parts and ensuring that the detector 2 and lens 1 remain coaxial.

[0032] In an optimized implementation, the focusing mounting base 9 is equipped with a plurality of clamps 6, and the focusing mounting base 9 is selectively connected to one of the clamps 6. Different clamps 6 can be adapted to different models or specifications of detectors 2 to adapt to the adjustment of the optical back cutoff of various optical imaging components.

[0033] In the optimized implementation, the position of the clamp 6 on the focusing mount 9 is adjustable, and the adjustment direction is parallel to the vertical direction. This allows for fine-tuning of the installation height of the clamp 6 in the vertical direction, ensuring that the detector 2 and lens 1 are coaxial and facilitating back focus adjustment. Adjusting the longitudinal position of the detector 2 on the clamp 6 and the vertical position of the clamp 6 on the focusing mount 9 allows for fine-tuning of the longitudinal and vertical positions of the detector 2. These two axial fine-tuning adjustments effectively eliminate tolerances in structural components, ensuring that the detector assembly 2 and lens 1 remain coaxial.

[0034] Specifically, the focusing mounting base 9 is provided with a fourth threaded mounting hole 91, which is an oblong hole with its length direction parallel to the vertical direction. The mounting part 63 of the clamp 6 is connected to the fourth threaded mounting hole 91. The vertical mounting position of the clamp 6 on the focusing mounting base 9 is adjustable, which can ensure that the detector 2 and the lens 1 are coaxial.

[0035] The optimized implementation also includes a sliding translation component 4 and a driving unit 7. The sliding translation component 4 is disposed on the base plate 3, and the focusing mounting base 9 is disposed on the sliding translation component 4. The output end of the driving unit 7 is connected to the focusing mounting base 9. The driving unit 7 can drive the focusing mounting base 9 to move along the lens axis to approach or move away from the lens mounting position.

[0036] In an optimized implementation, the drive unit 7 includes a piezoelectric actuator coaxial with the detector 2. The piezoelectric actuator is mounted on the base plate 1 via an actuator support 71. The lateral mounting position of the piezoelectric actuator on the base plate 1 is adjustable, and this lateral position is parallel to the moving direction of the focusing mounting base 9. Specifically, the piezoelectric actuator is bolted to the actuator support 71. The focusing mounting base 9 is connected to the output end of the piezoelectric actuator. The actuator support 71 is bolted to the base plate 1, and its lateral mounting position on the base plate 1 is adjustable. The mounting position of the piezoelectric actuator can be initially determined according to the type of optical lens.

[0037] As one specific implementation method, for the back focal length adjustment of a radial sleeve structure lens, the lens is mounted on the lens bracket 1, the detector assembly is fixed on the clamp 2, the piezoelectric actuator is started, and the back focal length adjustment can be completed by following the above method.

[0038] As one specific implementation method, for adjusting the back focal length of the axial flange structure lens, loosen the actuator support seat 71 bolts, pull the piezoelectric actuator back, and the detector assembly 2 will be separated from the lens 1 at this time. After adding the adjustment shims, reset the piezoelectric actuator, fix the detector assembly 2, and complete the index test.

[0039] Specifically, it also includes an adapter 8, which is disposed on the base plate 3. The sliding translation component 4 and the drive unit 7 are mounted on the adapter 8. Specifically, the base plate 3 is provided with a mounting groove 31, and the lens bracket 1 is mounted on the mounting groove 31. The base plate 3 is also provided with an adapter mounting position. The adapter 8 is mounted on the base plate 3 by bolts. The height and length of the adapter 8 can be set according to requirements. The sliding translation component 4 and the actuator support 71 are both mounted on the adapter 8. The adapter 8 is provided with a second threaded mounting hole 81. The sliding translation component 4 is mounted at the second threaded mounting hole 81. The end of the adapter 8 away from the second threaded mounting hole 81 is provided with multiple sets of third threaded mounting holes 82 in the transverse direction. The actuator support 71 is selectively mounted on one set of third threaded mounting holes 82. The transverse mounting position of the actuator support 71 can be adjusted to meet the needs of different models of detectors 2. The tooling, through the corresponding actuator support 71, adjusts the shaft mounting height of the piezoelectric actuator adjustment end to initially match the optical axis height of the optical lens, and applies force evenly during the adjustment process to improve debugging accuracy and safety.

[0040] In an optimized implementation, the sliding translation component 4 includes a slide rail 41 and an adapter 42. The slide rail 41 is disposed on the adapter 8, the adapter 42 is disposed on the slide rail 41, the focusing fixing seat 9 is disposed on the adapter 42, and the focusing fixing seat 9 is connected to the output end of the piezoelectric actuator.

[0041] Preferably, the slide rail 41 is a cross ball slide rail, which has high precision and can improve the adjustment accuracy of the lens back focal length, with the tooling accuracy being less than 0.01mm.

[0042] Preferably, the tooling is configured with multiple adapters 42 and multiple actuator supports 71. In use, one adapter 42 and one actuator support 71 are selected and configured to adjust the axial mounting height of the piezoelectric actuator adjustment end to match the optical axis height of the optical lens, thereby improving the adjustment accuracy. By configuring appropriate adapters 42 and actuator supports 71, it can be adapted to adjust the back focal length of different lens models. In use, the fixture, adapters, and actuator supports can be replaced according to the type of optical imaging component, achieving the tooling's versatility. At the same time, the structural design of the replacement parts ensures the coaxiality of the piezoelectric actuator and the optical lens, and the adjustable structure of the fixture 6 and the focusing fixing seat 9 ensures the coaxiality of the detector assembly and the piezoelectric actuator, ultimately achieving coaxiality between the optical lens and the detector assembly during the adjustment process.

[0043] The working principle of the lens back-cutoff adjustment fixture provided in this application is as follows: A fixture 6 matching the detector assembly is set according to the structure of the optical imaging component, and a corresponding adapter 42 and actuator support 71 are provided. The axial mounting height of the piezoelectric actuator adjustment end is adjusted to match the optical axis height of the optical lens. By adjusting the fixing screws passing through the oblong holes on the fixture fixture 6 and the focusing mounting base 9, fine adjustments are made to the horizontal and vertical axes respectively. Simultaneously, the piezoelectric actuator adjustment end is matched with the optical axis height of the optical lens. After fine adjustment, the axis of the piezoelectric actuator adjustment end is made concentric with the detector. Force is applied evenly during adjustment, ultimately ensuring that the detector assembly and the optical lens remain coaxial during adjustment. The fixture can also reduce the tilt angle of the detector image plane, enabling parallel movement of the detector. Furthermore, with the piezoelectric actuator's own precision, the back-cutoff movement can be calculated using the actuator's upper computer stroke, thus ensuring adjustment accuracy. The operator only needs to focus on the image output by the thermal imager. This invention solves problems such as the combination of manual and expert work, detector image plane tilt, lack of calibration reference, and inability to quantify adjustment amounts. The calibration fixture of this application features high precision, high efficiency, large load capacity, and strong structural compatibility, and can be widely used for the calibration of optical backstop of various optical imaging components, demonstrating strong applicability.

[0044] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0045] Those skilled in the art will understand that this invention can be implemented in many other specific forms without departing from the spirit and scope of this invention. Although embodiments of this invention have been described, it should be understood that this invention is not limited to these embodiments, and those skilled in the art can make changes and modifications within the spirit and scope of this invention as defined in the appended claims.

Claims

1. A lens optical adjustment tool, comprising a base plate, a focusing fixing seat slidingly arranged on the base plate, a clamp arranged on the focusing fixing seat, and a lens holder arranged on the base plate and provided with a lens mounting position, a sliding direction of the focusing fixing seat being parallel to a lens axial direction defined by the lens mounting position, characterized in that, The clamp comprises side plates, and upper and lower clamping plates with plate surfaces parallel to the horizontal plane, the upper and lower clamping plates being connected to the upper and lower ends of the side plates in opposition and enclosing a C-shaped clamping cavity suitable for clamping the detector, the slot of the C-shaped clamping cavity facing the lens mounting position, the upper and / or lower clamping plate being provided with a first threaded mounting hole for screwing with the detector housing, the axial direction of the first threaded mounting hole being parallel to the vertical direction.

2. The lens optical alignment tool of claim 1, wherein, The distance between the upper and lower clamping plates is adjustable.

3. The lens optical alignment tool of claim 1, wherein, The focusing fixing seat is selectively connected with one of the clamps.

4. The lens optical alignment tool of claim 1, wherein, The first threaded mounting hole is a waist-shaped hole, the length direction of the waist-shaped hole being parallel to the longitudinal direction, and the longitudinal direction being perpendicular to the sliding direction of the focusing fixing seat.

5. The lens optical alignment tool of claim 1, wherein, The position of the clamp on the focusing fixing seat is adjustable, and the adjustment direction is parallel to the vertical direction.

6. The lens optical alignment tool of claim 1, wherein, The focusing fixing seat is provided on the sliding translation assembly, and the output end of the driving unit is connected with the focusing fixing seat.

7. The lens optical alignment tool of claim 6, wherein, The sliding translation assembly comprises a slide rail provided on the bottom plate and an adapter provided on the slide rail, and the focusing fixing seat is provided on the adapter.

8. The lens optical alignment tool of claim 6, wherein, The sliding translation assembly and the driving unit are provided on the adapter seat provided on the bottom plate.

9. The lens optical alignment tool of claim 6, wherein, The driving unit comprises a piezoelectric actuator mounted on the bottom plate through an actuator support seat.

10. The lens optical alignment tool of claim 9, wherein, The position of the actuator support seat on the bottom plate is adjustable, and the adjustment direction is parallel to the transverse direction, which is parallel to the sliding direction of the focusing fixing seat.

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