Lens cylindrical mirror angle calibration device and calibration method thereof

Abstract

The application provides a lens cylindrical mirror angle calibration device and a calibration method thereof. The base includes an optical platform and a work platform arranged on the optical platform. The lens mounting mechanism is mounted on the work platform and is used for detachably connecting a standard lens or a lens to be calibrated. The object plane input mechanism is used for generating and projecting a preset reference pattern along an optical path, and is slidably connected to the work platform to adjust the relative distance from the lens to be calibrated or the standard lens. The image sensing mechanism includes a camera and a position adjusting assembly. The camera is mounted on the position adjusting assembly, and the position adjusting assembly is mounted on the work platform to adjust the position of the camera so that the optical axis of the standard lens is collinear with the projection optical path of the reference pattern. The analysis and display module is in communication connection with the camera. The lens cylindrical mirror angle calibration device provided by the application ensures the high consistency of calibration results of different batches and different operators, and the real-time operation logic of the same station.

Description

Technical Field

[0001] This application belongs to the field of optical lens adjustment technology, and more specifically, relates to a lens cylindrical mirror angle calibration device and calibration method. Background Technology

[0002] Anamorphic widescreen lenses are the core product for achieving widescreen images in cinematography. They use built-in cylindrical lenses to compress light horizontally, which is then stretched horizontally in post-production to create a uniquely aesthetically pleasing widescreen image. The installation angle of the cylindrical lens (i.e., the rotation angle of its generatrix relative to the lens's optical axis) directly determines the final image effect: on the one hand, the iconic horizontal flare "straightening" formed by the cylindrical lens when strong light sources are incident must have an angle that matches the composition of the image and the photographer's artistic expectations; any deviation in angle will ruin the aesthetic effect. On the other hand, deviations in angle can also cause aberrations such as astigmatism and field curvature, affecting the sharpness of the image edges and the overall consistency of the image.

[0003] The existing cylindrical lens angle calibration technology has long relied on operators to manually fine-tune the glare and streaks formed by strong point light sources by observing them with their naked eyes. Not only is the calibration accuracy affected by the operator's experience, subjective judgment and ambient light interference, resulting in poor consistency of calibration results between different batches and different operators, but it also lacks a unified calibration benchmark and standardized process. Each lens needs to be repeatedly adjusted individually, which cannot adapt to the batch assembly needs of different lens models and has insufficient versatility. Summary of the Invention

[0004] The purpose of this application is to provide a cylindrical lens angle calibration device and calibration method to solve the technical problems in the prior art, such as poor consistency of calibration results due to manual adjustment of cylindrical lens angle, lack of unified benchmark and standardized process, and inability to adapt to batch assembly of different lens models.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide a lens cylindrical lens angle calibration device, comprising: The base includes an optical platform and a working platform, wherein the working platform is disposed on the optical platform; A lens mounting mechanism is used to detachably connect the lens to be calibrated or a standard lens and mount it on the working platform; An object plane input mechanism is used to generate and project a preset reference pattern along the optical path. The object plane input mechanism is slidably connected to the working platform to adjust the relative distance between the object plane input mechanism and the lens to be calibrated, or to adjust the relative distance between the object plane input mechanism and the standard lens. An image sensing mechanism is disposed on the side of the lens mounting mechanism opposite to the object input mechanism. The image sensing mechanism includes a camera and a position adjustment component. The camera is mounted on the position adjustment component, which is mounted on the working platform. The position adjustment component is used to adjust the position of the camera so that the optical axis of the standard lens is collinear with the projection light path of the reference pattern, thus establishing a light path reference. The analysis and display module is communicatively connected to the camera and is used to display the reference pattern of the image formed by the lens to be calibrated.

[0006] Optionally, the working platform is vertically mounted on the optical platform, and the object surface input mechanism is slidably connected to the working platform in the vertical direction.

[0007] Optionally, the object surface input mechanism includes: The lens barrel is slidably connected to the working platform in the vertical direction; A light source component is disposed at the end of the lens barrel opposite to the lens mounting mechanism; and A reticle structure is disposed at one end of the lens barrel facing the lens mounting mechanism, and is used to modulate the light emitted by the light source component to form the reference pattern.

[0008] Optionally, the reticle structure includes a cross reticle, an orthogonal line reticle, or a grid reticle.

[0009] Optionally, the object surface input mechanism further includes a sliding adjustment component, the sliding adjustment component comprising: The slide rail is vertically mounted on the working platform; A slider is slidably connected to the slide rail along its length, and the lens barrel is connected to the slider; and A locking adjustment structure, connected to the slider, is used to adjust the movement position of the slider and lock it.

[0010] Optionally, the locking adjustment structure includes: A lead screw is rotatably connected to the slide rail, and one end of the lead screw is threadedly connected to the slider; A turntable, connected to the other end of the lead screw, is used to drive the lead screw to rotate, thereby moving the slider; and A locking screw, threadedly connected to the slider, is used to lock the slider's movement position.

[0011] Optionally, the lens mounting mechanism includes: The base is mounted on the working platform; and A bayonet adapter is located on the side of the base away from the camera and is detachably connected to the base. It is used to match and connect with the rear interface of the lens to be calibrated to adapt to different models of lenses to be calibrated. When the lens to be calibrated is mounted on the bayonet adapter, the optical axis of the lens to be calibrated is set in a vertical direction.

[0012] Optionally, the base has an optical channel extending through its thickness direction, the axis of the optical channel is collinear with the optical axis of the lens to be calibrated, the camera is located on the side of the optical channel away from the bayonet adapter, and the optical channel is used for the reference pattern light rays for imaging the lens to be calibrated to pass through to the camera.

[0013] Optionally, the position adjustment component includes: The first mobile platform is installed on the working platform and is used to move along the first direction; A second mobile platform, mounted on the first mobile platform, is used to move along a second direction perpendicular to the first direction; and A third mobile platform is mounted on the second mobile platform and is used to move along a third direction that is perpendicular to both the first and second directions; The camera is mounted on the third mobile platform.

[0014] This application also provides a method for calibrating the angle of a cylindrical lens, using the aforementioned cylindrical lens angle calibration device. The method includes: A standard lens is mounted on the lens mounting mechanism, and the position adjustment component is adjusted so that the optical axis of the standard lens is collinear with the projection optical path of the reference pattern, and the image of the reference pattern displayed on the analysis display module meets the preset reference conditions. The preset reference conditions include that the center of the reference pattern coincides with the center of the field of view, and that the lines of the reference pattern are horizontal and vertical. Keeping the position adjustment component unchanged, replace the standard lens with the lens to be calibrated; Adjust the relative distance between the object plane input mechanism and the lens to be calibrated until a clear reference pattern image is displayed on the analysis display module; The imaging of the reference pattern is observed through the analysis and display module; The angle of the cylindrical mirror inside the lens to be calibrated is adjusted according to the shape of the image formed by the reference pattern.

[0015] The beneficial effects of the cylindrical lens angle calibration device provided in this application are as follows: Compared with the prior art, the cylindrical lens angle calibration device of this application establishes an optical path reference in advance through a standard lens, eliminating mechanical installation errors. With the standardized reference pattern provided by the object input mechanism, the invisible cylindrical lens angle deviation is intuitively transformed into a straight line tilt on the screen, changing the adjustment basis from subjective feeling to objective image, which significantly improves the assembly and adjustment accuracy. At the same time, the standardized operation process and unified visual reference eliminate the differences in human judgment between different operators and different batches, ensuring a high degree of consistency in the assembly and adjustment results. Furthermore, the detachable lens mounting mechanism is compatible with different lens models, effectively improving the problem of insufficient universality of the prior art, which is conducive to realizing the batch assembly and calibration of anamorphic widescreen lenses. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A three-dimensional structural schematic diagram of the lens cylindrical mirror angle calibration device provided in an embodiment of this application; Figure 2 This is an exploded structural diagram of the lens cylindrical mirror angle calibration device provided in the embodiments of this application; Figure 3 A three-dimensional structural diagram of the lens barrel, light source component, and reticle structure provided in the embodiments of this application; Figure 4 A three-dimensional structural diagram of the base provided in the embodiments of this application; Figure 5 A three-dimensional structural diagram of the position adjustment component used in the embodiments of this application. Figure 1 ; Figure 6 A three-dimensional structural diagram of the position adjustment component used in the embodiments of this application. Figure 2 ; Figure 7 This is a schematic flowchart of the lens cylindrical lens angle calibration method used in the embodiments of this application; Figure 8 A grayscale image of the lens cylindrical lens angle calibration method in the prior art; Figure 9 for Figure 8 A color version of a grayscale image; Figure 10 A grayscale image of the standard lens provided in the embodiments of this application; Figure 11 for Figure 10 A color version of a grayscale image; Figure 12 A grayscale image of the lens to be calibrated provided in the embodiments of this application; Figure 13 for Figure 12 A color version of a grayscale image.

[0018] The following are the labeling elements in the figure: 1-Base; 11-Optical platform; 12-Working platform; 2-Lens mounting mechanism; 21-Base; 211-Optical channel; 22-Mount adapter; 3-Object input mechanism; 31-Lens tube; 311-Flange; 32-Light source component; 33-Reticle structure; 34-Sliding adjustment assembly; 341-Slide rail; 342-Slider; 343-Locking adjustment structure; 3431-Lead screw; 3432-Turntable; 3433-Locking screw; 3434-Guide rod; 344-First clamping component; 4-Image sensing mechanism; 41-Camera; 42-Position adjustment assembly; 421-First moving platform; 422-Second moving platform; 423-Third moving platform; 424-First driving component; 425-Second driving component; 426-Third driving component; 427-Second clamping component; 51 - Lens to be calibrated; 52 - Standard lens; L1 - First direction; L2 - Second direction; L3 - Third direction. Detailed Implementation

[0019] To make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following describes this application in further detail with reference to the accompanying drawings and embodiments.

[0020] The installation angle of the cylindrical lens within the lens, i.e., the direction of rotation of its generatrix relative to the lens's optical axis, has a crucial impact on the final imaging effect. Currently, the calibration of the cylindrical lens angle mainly relies on the assembly operator's visual observation and manual fine-tuning. See details... Figure 8 and Figure 9 The imaging diagram shown illustrates the specific process of pointing the lens at a strong point light source and observing the resulting glare streaks on the camera screen. If the streaks are not horizontal, the operator needs to manually rotate the cylindrical lens barrel slightly until the streaks are adjusted to be horizontal before locking it in place.

[0021] However, manual adjustment and observation make calibration accuracy susceptible to operator experience, subjective judgment and ambient light interference, resulting in poor consistency of calibration results between different batches and different operators. Furthermore, the lack of a unified calibration benchmark and standardized process requires repeated adjustments for each lens, which cannot meet the batch assembly needs of different lens models and has insufficient versatility.

[0022] Based on this, see Figures 1 to 13 This application provides a lens cylindrical lens angle calibration device and calibration method to solve the above-mentioned technical problems.

[0023] Based on this, this application provides a cylindrical lens angle calibration device and a cylindrical lens angle calibration method. By pre-establishing an optical path reference using a standard lens, mechanical installation errors are eliminated. Combined with the standardized reference pattern provided by the object surface input mechanism, the invisible cylindrical lens angle deviation is intuitively transformed into a straight line tilt on the screen, changing the adjustment basis from subjective feeling to objective image, significantly improving the assembly and adjustment accuracy. At the same time, the standardized operation process and unified visual reference eliminate the differences in human judgment between different operators and different batches, ensuring a high degree of consistency in the assembly and adjustment results. Furthermore, the detachable lens mounting mechanism adapts to different lens models, effectively improving the problem of insufficient universality in the prior art, which is conducive to realizing the batch assembly and calibration of anamorphic widescreen lenses.

[0024] Please refer to the following: Figure 1 and Figure 2 The lens cylindrical lens angle calibration device provided in this application embodiment will now be described. The lens cylindrical lens angle calibration device includes a base 1, a lens mounting mechanism 2, an object plane input mechanism 3, an image sensing mechanism 4, and an analysis and display module. The base 1 includes an optical platform 11 and a working platform 12, with the working platform 12 mounted on the optical platform 11. The lens mounting mechanism 2 is mounted on the working platform 12 and is used to detachably connect a standard lens 52 or a lens 51 to be calibrated. The standard lens 52 is a lens without a cylindrical lens, and the lens 51 to be calibrated is a lens with a cylindrical lens. The object plane input mechanism 3 is used to generate and project a preset reference pattern along the optical path. The object plane input mechanism 3 is slidably connected to the working platform 12 in the vertical direction to adjust the relative distance between the object plane input mechanism 3 and the lens 51 to be calibrated. The distance between the object input mechanism 3 and the standard lens 52 is adjusted; the image sensing mechanism 4 is located on the side of the lens mounting mechanism 2 away from the object input mechanism 3. The image sensing mechanism 4 includes a camera 41 and a position adjustment component 42. The camera 41 is mounted on the position adjustment component 42, which is mounted on the working platform 12. The position adjustment component 42 is used to adjust the position of the camera 41 so that the optical axis of the standard lens 52 is collinear with the projection optical path of the reference pattern and to establish an optical path reference; the analysis display module is communicatively connected to the camera 41 and is used to display the reference pattern imaged by the lens 51 to be calibrated.

[0025] Specifically, the base 1 serves as the core mounting and support body of the overall adjustment device. The optical platform 11, as a horizontal reference carrier, can be a platform with high flatness and high rigidity to effectively reduce the interference of external vibration and its own deformation on the calibration optical path. The working platform 12 is set on the optical platform 11. Its connection with the optical platform 11 can be achieved by bolt fastening, positioning pin fixing, or integral molding, thereby providing a unified mounting plane for each mechanism and ensuring that the installation position of each mechanism meets the optical path design requirements.

[0026] The lens mounting mechanism 2 is a key component for achieving precise lens positioning and rapid lens change. It provides a unified mounting reference for the lens 51 to be calibrated or the standard lens 52, while also adapting to different lens models through a detachable connection. The connection between this mechanism and the work platform 12 can be achieved using bolts or precision positioning pins, such as a replaceable bayonet adapter 22, a threaded connector, or a quick-release locking structure. In practical applications, this mechanism is first used to install the standard lens 52 to establish a system reference, and then replaced with the lens 51 to be calibrated for actual adjustment, thereby eliminating the influence of mechanical installation errors on the calibration results.

[0027] The object input mechanism 3 generates and projects a preset reference pattern. This mechanism is slidably connected to the work platform 12 via a precision guiding structure such as a linear guide rail or a sliding block. With the help of a locking component, the object input mechanism 3 can be fixed in any adjusted position, thereby precisely adjusting the relative distance with the lens. Specifically, the relative distance with the lens to be calibrated 51 or the standard lens 52 can be flexibly changed through sliding adjustment to adapt to the imaging requirements of lenses with different focal lengths and optical parameters, ensuring that the reference pattern forms a clear image on the target surface of the camera 41. The preset reference pattern is preferably a cross shape, or orthogonal lines, or other patterns with clear geometric features. These patterns can clearly reflect the image tilt or distortion caused by the cylindrical lens angle deviation.

[0028] The image sensing mechanism 4 is used to receive the reference pattern after it has been imaged by the lens. It is mounted on the working platform 12 through the position adjustment component 42. The position adjustment component 42 can be a multi-degree-of-freedom structure, so that the optical axis of the standard lens 52 is precisely collinear with the projection optical path of the reference pattern, ensuring that the target surface of the camera 41 is conjugate with the image plane of the standard lens 52, providing a unified reference for the calibration of all lenses 51 to be calibrated in the future, effectively eliminating the reference difference between different batches of calibration, thereby establishing a unified optical path reference, and ensuring that the position adjustment accuracy of the camera 41 can meet the requirements of cylindrical mirror angle deviation detection.

[0029] As the core of image acquisition, camera 41 can be a high-resolution industrial camera. It is mounted on position adjustment component 42. Through the adjustment function of position adjustment component 42, the optical axis of standard lens 52 can be kept collinear with the projection optical path of reference pattern, ensuring that the reference pattern is accurately imaged on the target surface of camera 41 and avoiding calibration errors caused by optical axis offset.

[0030] The analysis and display module is a key component for visualizing the calibration process. It establishes a connection with the camera 41 via wired or wireless communication, receives the reference image signal transmitted by the camera 41, and displays the reference pattern imaged by the lens to be calibrated 51 or the standard lens 52 in real time. Its specific working principle is as follows: First, a known standard lens 52 without a cylindrical mirror is mounted to the lens mounting mechanism 2. The object input mechanism 3 is adjusted to generate a preset reference pattern and project it onto the standard lens 52 along the optical path. The position of the object input mechanism 3 is slidably adjusted so that the camera 41 initially captures the reference pattern image. Subsequently, the position of the camera 41 is adjusted by the position adjustment component 42 so that the optical axis of the standard lens 52 is collinear with the system optical path. At this time, the position of the camera 41 is locked to establish a precise system measurement reference.

[0031] Next, remove the standard lens 52 and install the lens 51 to be calibrated onto the lens mounting mechanism 2. Because the cylindrical mirror inside the lens 51 may have an angular deviation, the resulting astigmatism causes the straight line on the camera 41 display screen to tilt or become blurred. While observing the display screen, the operator rotates and adjusts the cylindrical mirror barrel 31 group inside the lens until the straight line returns to its standard state of being "horizontally flat and sharp." Finally, once the crosshair image meets the process requirements, immediately lock and fix the cylindrical mirror barrel 31 group to complete the calibration.

[0032] Compared with existing technologies, the cylindrical lens angle calibration device provided in this application eliminates mechanical installation errors by pre-establishing an optical path reference through a standard lens 52. Combined with the standardized reference pattern provided by the object input mechanism 3, it visually transforms the invisible cylindrical lens angle deviation into a straight line tilt on the screen, changing the adjustment basis from subjective feeling to an objective image, significantly improving assembly and adjustment accuracy. Simultaneously, the standardized operating procedure and unified visual reference eliminate human judgment differences between different operators and different batches, ensuring a high degree of consistency in assembly and adjustment results. Furthermore, the detachable lens mounting mechanism 2 adapts to different lens models, effectively improving the lack of versatility in existing technologies and facilitating the batch assembly and calibration of anamorphic widescreen lenses.

[0033] Further, see Figure 1 and Figure 2The optical platform 11 is horizontally positioned, and the working platform 12 is vertically positioned on the optical platform 11. The object input mechanism 3 is slidably connected to the working platform 12 in the vertical direction. The vertical positioning here means that the mounting surface of the working platform 12 is perpendicular to the bearing surface of the optical platform 11 at a 90° angle, ensuring that all subsequent components are arranged in the vertical direction, so that the lens optical axis and the reference pattern projection light path are both in the vertical direction. In this embodiment, by vertically setting the working platform 12 on the optical platform 11, on the one hand, the vertical setting of the working platform 12 determines the installation posture of the lens mounting mechanism 2, so that the lens to be calibrated 51 or the standard lens 52 can be installed in the vertical direction, avoiding the lens barrel sagging due to its own weight and the cylindrical lens causing a slight angular displacement due to gravity when installed horizontally, ensuring that the calibration state is consistent with the actual use state of the lens, and reducing calibration errors caused by posture differences; on the other hand, the vertically set working platform 12 provides a vertical guide for the sliding adjustment of the object input mechanism 3, so that the object input mechanism 3 can accurately adjust the relative distance with the lens in the vertical direction, ensuring that the reference pattern projection light path always extends in the vertical direction and is precisely collinear with the lens optical axis, further improving the stability of the optical path reference.

[0034] Please refer to one embodiment of this application as well. Figure 2 and Figure 3 The object input mechanism 3 includes a lens barrel 31, a light source component 32, and a reticle structure 33. The lens barrel 31 is slidably connected to the work platform 12 in the vertical direction; the light source component 32 is disposed at the end of the lens barrel 31 away from the lens mounting mechanism 2; the reticle structure 33 is disposed at the end of the lens barrel 31 facing the lens mounting mechanism 2, and is used to modulate the light emitted by the light source component 32 to form a reference pattern.

[0035] The lens barrel 31 serves as the mounting and protective carrier for the light source component 32 and the reticle structure 33, while also providing a stable optical path for light propagation, preventing external stray light from interfering with the generation and projection of the reference pattern. It is vertically connected to the work platform 12 via a sliding rail 341 and slider 342, guided by a linear guide rail, thereby causing the light source component 32 and the reticle structure 33 to slide synchronously, adjusting the relative distance between the reference pattern and the lens 51 to be calibrated. For example, the lens barrel 31 can be made of lightweight, high-strength materials such as aluminum alloy or stainless steel, and its inner wall can be coated with a matte finish to reduce light reflection interference within the lens barrel 31 and ensure the clarity of the reference pattern.

[0036] The light source component 32 provides stable and uniform light. It is located at the end of the lens barrel 31 away from the lens mounting mechanism 2 and can be fixed to the lens barrel 31 by means of threaded connection, snap-fit, or bolt fastening. Exemplarily, the light source component 32 can be an LED point light source, an LED surface light source, or a laser light source. In specific applications, this embodiment uses an LED point light source, and the light is emitted in parallel.

[0037] The reticle structure 33 and the light source component 32 are arranged correspondingly along the axis of the lens barrel 31 to ensure that the light emitted by the light source component 32 can completely cover the reticle structure 33. For example, the reticle structure 33 can be installed on the end of the lens barrel 31 facing the lens mounting mechanism 2 by means of a pressure ring or adhesive, ensuring its coaxiality with the lens barrel 31 and preventing the projection of the reference pattern from shifting. The reticle structure 33 can adopt a structure with clearly defined geometric features, such as a cross reticle, an orthogonal line reticle, or a network reticle, which can modulate the incident uniform light into a clearly defined reference pattern. Furthermore, when there is an angular deviation in the cylindrical mirror, the tilt and distortion characteristics of the pattern image are more easily identified. The reticle structure 33 can be fabricated from an optical glass substrate using photolithography and etching processes.

[0038] After the light source component 32 of this embodiment is powered on and emits light, the light is transmitted along the internal optical path of the lens barrel 31 to the reticle structure 33. The reticle structure 33 modulates the light to form a preset reference pattern. The reference pattern is then projected along the optical path onto the lens 51 to be calibrated. When the object distance needs to be adjusted, the sliding connection structure between the lens barrel 31 and the working platform 12 drives the entire object input mechanism 3 to move vertically. After adjusting to the target position, it is locked and fixed, thus completing the calibration of the reference pattern projection distance. The distance between the object surface of the light source and the entrance pupil surface of the lens 51 to be calibrated can be precisely adjusted, so that the calibration device can accurately calibrate and set the projection object distance, thereby flexibly simulating different shooting conditions from close range to long range, greatly improving the adaptability and testing versatility of the calibration device to different focal lengths and different lens models.

[0039] In one embodiment of this application, please refer to Figures 1 to 5 The reticle structure 33 includes, but is not limited to, a cross reticle, an orthogonal line reticle, or a grid reticle. In specific applications, the cross reticle is formed by fine, mutually perpendicular straight lines etched on a transparent substrate, creating a cross pattern. Since a point light source is imaged as a straight line by a cylindrical mirror, when the generatrix of the cylindrical mirror is horizontal, the horizontal lines of the cross reticle remain horizontal straight lines after imaging. However, when there is an angular deviation in the cylindrical mirror, the straight line formed by the cylindrical mirror will form an angle with the horizontal lines of the cross reticle, and this angle can directly reflect the deviation angle of the cylindrical mirror.

[0040] An orthogonal reticle is a reticle structure 33 with multiple sets of parallel and mutually perpendicular lines. For example, when there is a slight angular deviation in the cylindrical mirror, its imaging line will be tilted in the same way as the multiple sets of horizontal lines of the orthogonal reticle. The operator can more accurately determine the direction and degree of deviation by referring to the multiple sets of lines.

[0041] The reticle is a reticle structure 33 with densely intersecting orthogonal lines. Based on the characteristic that a point light source is imaged as a straight line by a cylindrical lens, the dense straight lines of the reticle can fully cover the lens field of view. When there is an angular deviation in the cylindrical lens, the deviation can be identified not only by the tilt relationship between the grid lines in the corresponding area and the cylindrical lens imaging line, but also by the overall sharpness of the grid imaging to provide feedback on aberrations such as astigmatism. If the grid lines in a certain area are blurred or have an irregular offset from the cylindrical lens imaging line, it can help determine whether the cylindrical lens angular deviation has caused additional aberrations.

[0042] This embodiment provides a clear angular reference benchmark through three types of reticle structures 33 with their own straight line shape. In actual use, the appropriate type can be flexibly selected according to the requirements of calibration accuracy, lens field of view, etc. Together with the light source component 32, a stable reference pattern is projected. Finally, by analyzing the relative relationship between the imaging straight line and the reticle lines presented by the display module, clear guidance is provided for the operator to adjust the cylindrical lens angle, ensuring calibration accuracy and consistency.

[0043] In another embodiment of this application, see [reference] Figure 2 The object input mechanism 3 also includes a sliding adjustment component 34, which includes a slide rail 341, a slider 342, and a locking adjustment structure 343. The slide rail 341 is vertically mounted on the work platform 12. The slider 342 is slidably connected to the slide rail 341 along the length of the slide rail 341, and a lens barrel 31 is connected to the slider 342. The locking adjustment structure 343 is connected to the slider 342 and is used to adjust the movement position of the slider 342 and lock it.

[0044] The slide rail 341 provides stable vertical guidance for the movement of the slider 342, ensuring that the lens barrel 31 is always adjusted along the preset optical path direction as the slider 342 moves, thus avoiding the impact of reference pattern projection offset on calibration accuracy.

[0045] The slider 342 is slidably connected to the slide rail 341 and can move along the length of the slide rail 341. The slider 342 can be connected to the lens barrel 31 by bolt connection, snap-fit ​​or flange cooperation and fixation. The lens barrel 31 and its internal light source component 32 and reticle structure 33 can be moved as a whole, ensuring that the generation of the reference pattern and the projection direction are always consistent during the adjustment of the object distance.

[0046] The locking adjustment structure 343 can be connected to the slider 342 by means of threaded engagement, elastic pressing, etc. The adjustment method can be designed according to the calibration accuracy requirements, such as using a lead screw 3431 adjustment, a micrometer head adjustment, or other precision adjustment structures, so that the operator can accurately control the movement of the slider 342 and achieve fine adjustment of the object distance. The locking method can be threaded locking, elastic locking pin locking, etc. After locking, sufficient locking force is required, while avoiding secondary displacement of the slider 342 position during the locking process.

[0047] In this embodiment, when the relative distance between the object input mechanism 3 and the lens 51 to be calibrated needs to be adjusted, the sliding adjustment component 34 first releases the locking adjustment structure 343, pushing the slider 342 to move along the vertically set slide rail 341. The slider 342 drives the lens barrel 31 to move synchronously. After the lens barrel 31 moves to the target position, the locking adjustment structure 343 locks the slider 342 in place, completing the object distance adjustment. During this process, the precise guidance of the slide rail 341, the stable transmission of the slider 342, and the reliable locking of the locking adjustment structure 343 work together to achieve precise and stable adjustment of the position of the object input mechanism 3, ensuring that the projection distance of the reference pattern meets the calibration requirements of different lens models.

[0048] Furthermore, the sliding adjustment assembly 34 also includes a first clamping member 344, which is connected to the slider 342. The first clamping member 344 is used to clamp the lens barrel 31. A flange 311 is provided on the edge of the lens barrel 31. The flange 311 abuts against the end face of the first clamping member 344 to prevent the lens barrel 31 from slipping.

[0049] In another embodiment of this application, please refer to Figure 2 The locking adjustment structure 343 includes a lead screw 3431, a turntable 3432, and a locking screw 3433. The lead screw 3431 is rotatably connected to the slide rail 341, and one end of the lead screw 3431 is threadedly connected to the slider 342. The turntable 3432 is connected to the other end of the lead screw 3431 and is used to drive the lead screw 3431 to rotate so as to move the slider 342. The locking screw 3433 is threadedly connected to the slider 342 and is used to lock the movement position of the slider 342.

[0050] The lead screw 3431 is the core transmission component that enables the linear movement of the slider 342. It converts the rotational motion input from the turntable 3432 into the vertical linear motion of the slider 342. The lead screw 3431 can be rotatably connected to the slider 342 through structures such as bearing support and bushing fit, ensuring smooth and uninterrupted rotation of the lead screw 3431 while maintaining the parallelism between the axis of the lead screw 3431 and the length direction of the slider 342. The threaded connection between the lead screw 3431 and the slider 342 can be a trapezoidal thread or a ball screw fit, featuring high transmission accuracy, low frictional resistance, and small backlash error.

[0051] The connection between the turntable 3432 and the other end of the lead screw 3431 can be achieved through key connection, pin connection, or integral molding, ensuring a secure connection and preventing relative slippage during adjustment. The turntable 3432 can be adapted to manual operation needs, such as featuring anti-slip textures and graduated markings. The anti-slip textures increase friction between the hand and the turntable 3432, preventing slippage during adjustment; the graduated markings accurately indicate the correspondence between the rotation angle of the lead screw 3431 and the displacement of the slider 342, allowing operators to intuitively read the adjustment amount and achieve quantitative adjustment of the object distance, further reducing human error in adjustment.

[0052] The locking screw 3433 is the core component for achieving stable locking of the slider 342. When the slider 342 moves to the target position, the pressure generated by the thread tightening will tightly fit the slider 342 with the slide rail 341, restricting the freedom of movement of the slider 342 and preventing the slider 342 from shifting due to device vibration or external interference, thus ensuring the stability after the object distance is adjusted.

[0053] In this embodiment, the locking adjustment structure 343 first loosens the locking screw 3433 to release the locking restriction on the slider 342. Then, the operator rotates the turntable 3432, which drives the lead screw 3431 to rotate on the slide rail 341. Since the lead screw 3431 is threadedly connected to the slider 342, the rotational motion of the lead screw 3431 is converted into the vertical linear motion of the slider 342 along the slide rail 341. The slider 342 synchronously drives the lens barrel 31 to move. When the object distance is adjusted to the correct position, the locking screw 3433 is tightened so that the end of the locking screw 3433 presses against the slide rail 341, and the slider 342 is stably locked in the current position, completing the precise adjustment and locking of the object distance. In this process, the cooperation between the lead screw 3431, the turntable 3432 and the locking screw 3433 not only realizes the fine and quantitative adjustment of the object distance and reduces the difficulty of operation, but also ensures the stability of the adjusted position.

[0054] It should be noted that the object distance mentioned in the above embodiments refers to adjusting the relative distance between the reticle structure 33 (i.e., the object surface of the light source) and the lens 51 to be calibrated, so as to ensure that the reference pattern can be clearly imaged on the target surface of the camera 41.

[0055] Furthermore, the locking adjustment structure 343 also includes a guide rod 3434, which is rotatably connected to the slide rail 341 and connected to the slider 342, so that the slider 342 can slide along the direction of the guide rod 3434.

[0056] In one embodiment of this application, please refer to Figure 2 and Figure 4The lens mounting mechanism 2 includes a base 21 and a bayonet adapter 22. The base 21 is mounted on the working platform 12. The bayonet adapter 22 is located on the side of the base 21 away from the camera 41 and is detachably connected to the base 21. It is used to match and connect with the rear interface of the lens 51 to be calibrated, so as to adapt to different models of the lens 51 to be calibrated. When the lens 51 to be calibrated is mounted on the bayonet adapter 22, the optical axis of the lens 51 to be calibrated is set in a vertical direction.

[0057] The base 21 serves as the core support and positioning base of the lens mounting mechanism 2. It can be installed on the work platform 12 by means of bolt fastening or precision positioning pins to ensure stable positioning after installation. At the same time, positioning holes, guide grooves and other structures can be set on the base 21 to provide a positioning benchmark for the precise installation of the bayonet adapter 22 and ensure the consistency of the lens optical axis after different bayonet adapters 22 are replaced.

[0058] The bayonet adapter 22 is the core adaptable component that enables universal lens mounting. Its design, which matches the rear interface of different models of lenses 51 to be calibrated, combined with its detachable connection to the base 21, allows for quick lens swapping and precise positioning. It should be noted that existing angle calibration often relies on finished product assembly, requiring the lens to be horizontally placed and locked. This can lead to lens angle shifts due to gravity during locking, necessitating repeated corrections. This device, through the bayonet adapter 22, moves the calibration process to the semi-finished product stage. Before the lens is fully sealed or assembled, it can be vertically mounted on the device for online adjustment. At this time, because the lens is in a vertical position, the operator can directly rotate and fine-tune the internal cylindrical lens without worrying about lens angle shifts due to gravity, ensuring image stability.

[0059] This embodiment uses a detachable bayonet adapter 22. By replacing different specifications of the bayonet adapter 22, it can adapt to the installation requirements of various lens models. At the same time, the standardized positioning reference of the base 21 and the installation structure of the bayonet adapter 22 ensure the consistency of the optical axis after different lenses are installed, reduce calibration errors caused by installation deviations, avoid repeated disassembly and equipment switching, shorten working time, and reduce the risk of lens damage and contamination. In addition, the lens can be installed vertically on the bayonet adapter 22 to avoid the cylindrical lens angle shift caused by gravity, thus ensuring imaging stability.

[0060] In one embodiment of this application, see reference Figure 2 and Figure 4 The base 21 has an optical channel 211 that runs through its thickness direction. The axis of the optical channel 211 is collinear with the optical axis of the lens 51 to be calibrated. The camera 41 is located on the side of the optical channel 211 away from the bayonet adapter 22. The optical channel 211 is used to allow reference pattern light for imaging of the lens 51 to pass through to the camera 41.

[0061] In this system, the reference pattern light projected by the object input mechanism 3 is incident vertically onto the vertically mounted lens 51 to be calibrated. After being imaged by the cylindrical mirror inside the lens, the imaged light passes through the base 21 along the optical path 211, which is collinear with the optical axis of the lens, and is directly transmitted to the camera 41 located on the other side of the optical path 211. After the camera 41 collects the light, it transmits the imaging signal to the analysis and display module for the operator to observe and judge the cylindrical mirror angle deviation. This avoids the interruption, reflection, or diffraction of the imaging light path by the base 21, thus ensuring the integrity of the imaging beam. It also prevents the introduction of additional stray light or image edge clipping, ensuring that the true image is ultimately received by the camera 41, thereby guaranteeing the accuracy of the calibration results.

[0062] In one embodiment of this application, please refer to Figure 2 , Figure 5 and Figure 6 The position adjustment assembly 42 includes a first moving platform 421, a second moving platform 422, and a third moving platform 423. The first moving platform 421 is mounted on the working platform 12 and is used to move along a first direction L1. The second moving platform 422 is mounted on the first moving platform 421 and is used to move along a second direction L2 that is perpendicular to the first direction L1. The third moving platform 423 is mounted on the second moving platform 422 and is used to move along a third direction L3 that is perpendicular to both the first direction L1 and the second direction L2. The camera 41 is mounted on the third moving platform 423.

[0063] The first moving platform 421 can be installed on the working platform 12 by means of bolt fastening or positioning pin engagement. For example, the first moving platform 421 has a first driving member 424, which can drive all the components on it to move linearly along the first direction L1. For example, the first direction L1 is the X-axis direction parallel to the plane of the working platform 12. The first driving member 424 can be selected by lead screw 3431 nut drive, gear rack drive or linear motor drive, etc., and in conjunction with the locking mechanism, realizes the coarse adjustment and precise positioning of the camera 41 in the first direction L1.

[0064] The second moving platform 422 is mounted on the movable part of the first moving platform 421. It has an independent second drive component 425, which can drive the components on it to move linearly along the second direction L2. The second direction L2 is configured to be strictly perpendicular to the first direction L1, for example, parallel to the plane of the work platform 12 and perpendicular to the Y-axis. The second drive component 425 of the second moving platform 422 can be selected from lead screw 3431 nut drive, gear rack drive, or linear motor drive, etc., and in conjunction with the locking mechanism, realizes the coarse adjustment and precise positioning of the camera 41 in the second direction L2.

[0065] The third moving platform 423 is mounted on the movable part of the second moving platform 422. It also has a third drive unit 426, which can drive the components on it to move linearly along a third direction L3. The third direction L3 is configured to be perpendicular to both the first direction L1 and the second direction L2, for example, perpendicular to the Z-axis direction of the working platform 12 plane, i.e., the vertical direction. The third drive unit 426 of the third moving platform 423 can be selected from lead screw 3431 nut drive, gear rack drive, or linear motor drive, etc., and in conjunction with the locking mechanism, realizes the coarse adjustment and precise positioning of the camera 41 in the third direction L3.

[0066] In this embodiment, the position adjustment component 42 adopts an orthogonal stack of three moving platforms. The operator can control the three moving platforms independently or in combination to achieve precise positioning and fine adjustment of the camera 41's attitude in three-dimensional space. Through fine adjustment, the photoelectric sensor target surface of the camera 41 can be precisely moved to the theoretical optimal image plane position of the lens 51 to be calibrated, so as to achieve clear focus and ensure that the imaging principal optical axis (optical axis) of the lens can be perpendicularly incident on the preset center area of ​​the target surface of the camera 41, thereby making the image clear and easy to observe.

[0067] Furthermore, the position adjustment assembly also includes a second clamp 427 for clamping the camera 41, and the second clamp 427 is connected to the third mobile platform 423.

[0068] Please see Figure 7 This application also provides a method for calibrating the angle of a cylindrical lens, which uses the cylindrical lens angle correction device in any of the above embodiments, as follows: S11: Install the standard lens 52 onto the lens mounting mechanism 2, and adjust the position adjustment component 42 so that the optical axis of the standard lens 52 is collinear with the projection light path of the reference pattern, and the image of the reference pattern displayed on the analysis display module meets the preset reference conditions. The preset reference conditions include that the center of the reference pattern coincides with the center of the field of view, and that the lines of the reference pattern are horizontally and vertically straight. For details, please refer to [link to relevant documentation]. Figure 10 and Figure 11 The image; Specifically, this step includes the crucial stage of establishing a reference for the standard lens 52. First, a standard lens 52 without cylindrical lenses is installed onto the lens mounting mechanism 2. Utilizing the known optical characteristics of the standard lens 52, the position of the camera 41 is adjusted by adjusting the position adjustment component 42 to establish a system reference, laying the foundation for the subsequent precise calibration of the lens 51 to be calibrated.

[0069] The center of the pattern coincides with the center of the field of view of the camera 41, ensuring that the optical axis of the lens 51 to be calibrated is collinear with the projection optical path of the reference pattern, thus avoiding imaging distortion caused by optical path offset. The horizontal and vertical lines of the reference pattern correspond to the ideal installation state that the cylindrical lens needs to achieve, providing a clear target reference for the subsequent adjustment of the cylindrical lens angle of the lens 51 to be calibrated. Under this preset reference condition, different operators can follow a unified standard during reference calibration, effectively eliminating differences in human judgment and ensuring the consistency of calibration results of different batches.

[0070] S12: Keeping the position of the position adjustment component 42 unchanged, replace the standard lens 52 with the lens to be calibrated 51; In this process, the lens to be calibrated 51 is installed on the same lens mounting mechanism 2. The optical axis positioning reference of the lens to be calibrated 51 and the standard lens 52 is kept consistent through the same mounting base. This simplifies the calibration steps, eliminates the need to repeatedly perform optical path reference calibration on each lens to be calibrated 51, greatly improves the efficiency of batch calibration, and also eliminates the human judgment difference caused by repeated debugging.

[0071] S13: Adjust the relative distance between the object input mechanism 3 and the lens 51 to be calibrated until a clear reference pattern image is displayed on the analysis display module; Specifically, since the optical parameters of the lens to be calibrated 51 and the standard lens 52 may differ, the object distance needs to be changed by finely adjusting the position of the object input mechanism 3. By adjusting the position of the object input mechanism 3, the reference pattern projected in real time is placed within the effective imaging range of the lens to be calibrated 51, ensuring that the reference pattern light can be stably incident on the lens to be calibrated 51 and form an observable image.

[0072] S14: Observe the imaging of the reference pattern through the analysis display module; Specifically, see Figure 12 and Figure 13 The imaging diagram is displayed in real time by the analysis and display module, showing the reference pattern after imaging by the lens 51 to be calibrated. If there is an angular deviation in the cylindrical lens, the astigmatism it produces will cause the displayed straight line to be tilted or blurred. The tilt angle directly reflects the angle error of the cylindrical lens, providing an objective and clear basis for subsequent adjustments. S15: Adjust the angle of the cylindrical mirror inside the lens 51 to be calibrated according to the shape of the image of the reference pattern.

[0073] Specifically, based on the real-time imaging feedback from the analysis and display module, the operator rotates and adjusts the cylindrical lens barrel 31 group inside the lens to be calibrated 51 while observing changes in the reference pattern. This allows for observation, adjustment, and verification at the same workstation, avoiding the cumbersome process of repeatedly disassembling and reassembling lenses and switching equipment in traditional methods. This shortens working hours and reduces the risk of damage and contamination during lens assembly and disassembly.

[0074] In this embodiment, by using the lens cylindrical mirror angle correction device in the above embodiment, a high degree of consistency in calibration results between different batches and different operators is ensured; at the same time, the real-time operation logic of the same workstation effectively solves the technical problems of low calibration accuracy, insufficient versatility, and low efficiency in the prior art.

[0075] The entire calibration method is as follows: 1. System optical axis and mechanical axis calibration: 1) Install the standard non-anamorphic widescreen lens 52 onto the mount adapter 22, ensuring the lens is securely mounted.

[0076] 2) A point light source is used, and the light is modulated by the cross reticle to form a cross reference pattern, which is then projected onto the standard lens 52 through the lens barrel 31.

[0077] 3) Rotate the turntable 3432 to drive the lead screw 3431 to rotate and drive the slider 342 and lens barrel 31 to move vertically along the slide rail 341, and adjust the relative distance between the object input mechanism 3 and the standard lens 52; until the camera 41 of the image sensing mechanism 4 initially captures the cross image, tighten the locking screw 3433 on the slider 342 to fix the position of the object input mechanism 3.

[0078] 4) Adjust the position adjustment component 42 of the image sensing mechanism 4. Adjust the camera 41 to move horizontally in two dimensions via the first moving platform 421 and the second moving platform 422, and adjust the camera 41 to move along the optical axis via the third moving platform 423, so that the target surface of the camera 41 is conjugate to the image plane of the standard lens 52. Ultimately, ensure that the center of the crosshair on the analysis display module coincides with the center of the field of view of the camera 41, and that the crosshairs are horizontally and vertically aligned, resulting in a sharp and clear image. (See [link]). Figure 10 and Figure 11 The resulting image. This step ensures that the lens mechanical axis is parallel to the system optical axis, establishing a precise measurement reference.

[0079] 2. Adjustment and locking of the cylindrical lens under test: 1) Replace the lens: Loosen the connection between the bayonet adapter 22 of the lens mounting mechanism 2 and the standard lens 52, and remove the standard lens 52; install the lens 51 to be assembled and calibrated onto the bayonet adapter 22, ensuring that the installation is secure and that the optical axis is collinear with the optical channel 211 axis on the base 21.

[0080] 2) Object distance re-inspection and imaging observation: Loosen the locking screw 3433 of the sliding adjustment component 34, and after fine-tuning the position of the lens barrel 31 according to the optical parameters of the lens 51 to be calibrated, lock it again; observe the imaging status through the analysis display module. Since there is an angular deviation of the cylindrical mirror inside the lens under test, the astigmatism it produces will cause the straight line on the display screen to be tilted or blurred. The tilt angle directly reflects the angular error of the cylindrical mirror.

[0081] 3) Adjusting the angle of the cylindrical lens barrel 31: The operator rotates the cylindrical lens barrel 31 group, which is fixed inside the lens 51 to be calibrated by the strip groove, while simultaneously observing and analyzing the changes in the image on the display module in real time; until the straight line of the image returns to a horizontal and sharp state, see [link to relevant documentation]. Figure 12 and Figure 13 The image.

[0082] 4) Locking: Once the cross image reaches an acceptable standard, the operator immediately locks and secures the cylindrical mirror barrel 31 group, tightens the clamping screws in the groove of the barrel 31, and completes the cylindrical mirror angle calibration.

[0083] 3. Final Result Verification: 1) Lens disassembly and installation test: Remove the calibrated lens 51 and install it onto the movie camera 41, ensuring that the lens and camera 41 interface are reliably connected.

[0084] 2) Glare and streaking verification: Point the movie camera 41 at a strong point light source (such as a flashlight) and take actual pictures. Observe whether the generated glare and streaking is horizontal on the monitor that comes with the camera 41.

[0085] 3) Qualification judgment: If the glare and streaking on the monitor are level, the adjustment is qualified and the lens will proceed to the next assembly process; if the glare and streaking are not level, return to step 1, reinstall the lens on the lens mounting mechanism 2 of the device, and repeat the above calibration process until qualified.

[0086] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0087] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0088] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, 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 application.

[0089] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0090] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A lens cylindrical mirror angle calibration device, characterized in that: include: The base includes an optical platform and a working platform, wherein the working platform is disposed on the optical platform; A lens mounting mechanism is used to detachably connect the lens to be calibrated or a standard lens and mount it on the working platform; An object plane input mechanism is used to generate and project a preset reference pattern along the optical path. The object plane input mechanism is slidably connected to the working platform to adjust the relative distance between the object plane input mechanism and the lens to be calibrated, or to adjust the relative distance between the object plane input mechanism and the standard lens. An image sensing mechanism is disposed on the side of the lens mounting mechanism opposite to the object input mechanism. The image sensing mechanism includes a camera and a position adjustment component. The camera is mounted on the position adjustment component, which is mounted on the working platform. The position adjustment component is used to adjust the position of the camera so that the optical axis of the standard lens is collinear with the projection light path of the reference pattern, thus establishing a light path reference. The analysis and display module is communicatively connected to the camera and is used to display the reference pattern of the image formed by the lens to be calibrated.

2. The lens cylindrical lens angle calibration device as described in claim 1, characterized in that: The working platform is vertically mounted on the optical platform, and the object input mechanism is slidably connected to the working platform along the vertical direction.

3. The lens cylindrical mirror angle calibration device as described in claim 2, characterized in that: The object input mechanism includes: The lens barrel is slidably connected to the working platform in the vertical direction; A light source component is disposed at the end of the lens barrel opposite to the lens mounting mechanism; and A reticle structure is disposed at one end of the lens barrel facing the lens mounting mechanism, and is used to modulate the light emitted by the light source component to form the reference pattern.

4. The lens cylindrical mirror angle calibration device as described in claim 3, characterized in that: The reticle structure includes a cross reticle, an orthogonal line reticle, or a grid reticle.

5. The lens cylindrical mirror angle calibration device as described in claim 3, characterized in that: The object input mechanism further includes a sliding adjustment component, which comprises: The slide rail is vertically mounted on the working platform; A slider is slidably connected to the slide rail along its length, and the lens barrel is connected to the slider; and A locking adjustment structure, connected to the slider, is used to adjust the movement position of the slider and lock it.

6. The lens cylindrical mirror angle calibration device as described in claim 5, characterized in that: The locking adjustment structure includes: A lead screw is rotatably connected to the slide rail, and one end of the lead screw is threadedly connected to the slider; A turntable, connected to the other end of the lead screw, is used to drive the lead screw to rotate, thereby moving the slider; and A locking screw, threadedly connected to the slider, is used to lock the slider's movement position.

7. The lens cylindrical lens angle calibration device as described in any one of claims 1 to 6, characterized in that: The lens mounting mechanism includes: The base is mounted on the working platform; and A bayonet adapter is located on the side of the base away from the camera and is detachably connected to the base. It is used to match and connect with the rear interface of the lens to be calibrated to adapt to different models of lenses to be calibrated. When the lens to be calibrated is mounted on the bayonet adapter, the optical axis of the lens to be calibrated is set in a vertical direction.

8. The lens cylindrical lens angle calibration device as described in claim 7, characterized in that: The base has a light channel extending through its thickness direction. The axis of the light channel is collinear with the optical axis of the lens to be calibrated. The camera is located on the side of the light channel away from the bayonet adapter, and the light channel is used to allow reference pattern light rays for imaging the lens to be calibrated to pass through to the camera.

9. The lens cylindrical lens angle calibration device as described in any one of claims 1 to 6, characterized in that: The position adjustment component includes: A first mobile platform is installed on the working platform and is used to move along a first direction; A second mobile platform, mounted on the first mobile platform, is used to move along a second direction perpendicular to the first direction; and A third mobile platform is mounted on the second mobile platform and is used to move along a third direction that is perpendicular to both the first and second directions; The camera is mounted on the third mobile platform.

10. A method for calibrating the angle of a cylindrical lens, characterized in that: Using the lens cylindrical lens angle calibration device as described in any one of claims 1 to 9, the lens cylindrical lens angle calibration method includes: A standard lens is mounted on the lens mounting mechanism, and the position adjustment component is adjusted so that the optical axis of the standard lens is collinear with the projection optical path of the reference pattern, and the image of the reference pattern displayed on the analysis display module meets the preset reference conditions. The preset reference conditions include that the center of the reference pattern coincides with the center of the field of view, and the lines of the reference pattern are horizontal and vertical. Keeping the position adjustment component unchanged, replace the standard lens with the lens to be calibrated; Adjust the relative distance between the object plane input mechanism and the lens to be calibrated until a clear reference pattern image is displayed on the analysis display module; The imaging of the reference pattern is observed through the analysis and display module; The angle of the cylindrical mirror inside the lens to be calibrated is adjusted according to the shape of the image formed by the reference pattern.

Images