Zoom lens and imaging equipment
By introducing a position feedback device and a processing control system into the zoom lens of the imaging device, the line width of the cross reticle is automatically adjusted, which solves the problem in the existing technology of being unable to accurately judge the distance of the target during the zoom process, and improves aiming accuracy. and user experience.
Patent Information
- Application Number
- CN202411461397.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-01-21
AI Technical Summary
During the zoom process of existing imaging equipment, the cross-dividing line cannot be automatically adjusted, resulting in the inability to accurately judge the distance of the target object at different focal lengths, affecting the aiming accuracy.
Design a zoom lens that includes a position feedback device and a processing control system. The real-time focal length feedback value is obtained through the position feedback device, and the processing control system is used to automatically adjust the line width of the cross reticle so that it is aligned with the target object in the imaging screen. The proportion remains the same.
The automatic adjustment of the cross section of the cross is achieved at different focal lengths, ensuring the accurate judgment of the target distance, and improved the aiming accuracy and user experience.
Smart Images
Figure CN119334198A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of imaging equipment, and in particular relates to a zoom lens and an imaging equipment. Background Art
[0002] In the prior art, in order to improve the hit rate of firearm shooting, it is usually necessary to equip the firearm with various sighting devices (such as infrared sights with a split plate, etc.), and display the reticle on the split plate in the field of view of the sighting device to assist the user in aiming at the target and improve the hit rate. The above-mentioned reticle is usually a cross reticle that crosses each other perpendicularly. At the same time, windage compensation lines and ballistic compensation lines can be respectively set on the horizontal reference datum line and the vertical reference datum line of the reticle to further improve the user's aiming accuracy.
[0003] However, in some types of imaging devices, the graticules are mainly electronic cross-reticle lines, and the line width of the electronic cross-reticle lines is usually displayed on the image display screen with a fixed number of pixels, which does not change with the focal length of the imaging device lens.
[0004] Therefore, existing imaging devices still have the following problems in use: (1) The crosshairs can only be matched with the image in a specific focal length range of the continuous zoom lens. In other focal length ranges, the crosshairs icon will be too large to block the observed object, or the crosshairs icon will be too small to be seen clearly. (2) When the focal length of the lens changes, the proportion of the same target object in the imaging picture also changes, thereby making the probabilistic ranging function achieved with the help of the crosshairs invalid, resulting in the inability to accurately judge the distance of the target object. Summary of the invention
[0005] The object of the present invention is to provide a zoom lens and an imaging device, which can not only perform continuous zooming on the imaging device, but also improve the aiming performance of the imaging device.
[0006] To achieve the above object, the present invention provides the following technical solutions:
[0007] A zoom lens comprises a lens barrel, an objective lens, a zoom device and a position feedback device, wherein the zoom device comprises a curved barrel for adjusting the focal length; the position feedback device is connected to the curved barrel and is used to obtain a feedback value for marking the real-time focal length.
[0008] Preferably, the position feedback device comprises: a mounting seat, which can move with the rotation of the curve cylinder; and a position sensor, which is arranged in the mounting seat and is used to obtain the position information of the mounting seat, thereby obtaining the feedback value.
[0009] Preferably, a gear ring is provided on the outer periphery of one end of the curved cylinder, and a gear matching with the gear ring is provided at one end of the mounting seat.
[0010] Preferably, the position sensor comprises a Hall sensor or a potentiometer.
[0011] An imaging device comprises an electronic graticule system and a processing control system for forming and adjusting cross-reticle lines, and the imaging device also comprises the above-mentioned zoom lens; the processing control system is used to receive and process the feedback value, and control the electronic graticule system according to the feedback value, so that the electronic graticule system automatically adjusts the line width of the cross-reticle lines according to the focal length of the zoom lens.
[0012] Preferably, the processing control system includes a first processor and a second processor; the first processor is used to receive the feedback value and convert the feedback value into a focal length value of the zoom lens; the second processor is used to receive the focal length value and convert the focal length value into a line width of the cross-reticle.
[0013] Preferably, a first relational function is preset in the first processor to convert the feedback value into the focal length value; and a second relational function is preset in the second processor to convert the focal length value into the line width of the cross-reticle.
[0014] Preferably, the line width of the cross-reticle is represented by a line width value; and the second relationship function is a corresponding relationship between the focal length value and the line width value.
[0015] Preferably, the line width value is the number of pixels occupied by the line width of the cross-reticle line.
[0016] Preferably, it is characterized in that the second relationship function is obtained by fitting the focal length value and the line width value of the zoom lens in the short-focus state and the long-focus state.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] 1) The zoom lens in the present invention, especially the manual continuous zoom focal length lens, can realize the zoom of the imaging device by optical zooming scheme, expand the full field of view search range of the imaging device, and at the same time maintain the continuity of observation during the zooming process without losing the target;
[0019] 2) A position sensor is provided to provide feedback on the focal length change, and cooperates with the processing control system to ensure that at different focal lengths, the target object observed by the user in the eyepiece remains unchanged in proportion to the crosshairs, regardless of whether the target object becomes larger or smaller, thereby ensuring that at any focal length, the probabilistic ranging and ballistic drop compensation functions of the imaging device can be normally implemented, thereby improving the user's aiming rate, ensuring the shooting accuracy requirements, and enhancing the user experience;
[0020] 3) The smallest scale unit in the cross-reticle is used as the line width, and the number of pixels occupied by the line width is used as the line width value. The size of the cross-reticle is adjusted by increasing or decreasing the number of pixels occupied by each line width in the image display screen. This processing method has low processing power requirements for the processing control system and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1a is a cross-sectional view of an imaging device of the present invention;
[0022] Figure 1b for Figure 1a A in the enlarged view;
[0023] Figure 1c This is a connection diagram of the imaging device of the present invention;
[0024] Figure 2 It is a schematic diagram showing the short-focus state image and the cross-reticle display;
[0025] Figure 3 It is a schematic diagram showing the mid-focus state image and the cross-reticle display;
[0026] Figure 4 It is a schematic diagram showing a telephoto state image and a crosshair line display;
[0027] Figure 5 It is a feedback chain diagram of the imaging device of the present invention. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0029] Embodiment 1:
[0030] This embodiment provides a zoom lens, such as Figure 1a and 1b As shown, it includes a lens barrel 100, an objective lens, a zoom device and a position feedback device. The objective lens, the zoom device and the position feedback device are all arranged in the lens barrel 100. The zoom device is connected to the objective lens for adjusting the focal length; the position feedback device is connected to the zoom device for obtaining a real-time feedback value of the focal length, so that the focal length change of the zoom lens can be monitored in real time.
[0031] At the same time, the objective lens includes a first lens 1, a second lens 2, a third lens 3 and a fourth lens 4, which are arranged in sequence from the object side to the imaging side, and the first lens 1, the second lens 2, the third lens 3 and the fourth lens 4 are coaxially arranged, wherein the first lens 1 has a positive refractive power and is a front fixed group, the second lens 2 has a negative refractive power and is a zoom group; the third lens 3 has a positive refractive power and is a compensation group; the fourth lens has a positive refractive power and is a focusing group.
[0032] The zoom device of the zoom lens comprises a curved barrel 6, a guide pin 7, a focus hand wheel 8 and a lens holder 17. The second lens 2 and the third lens 3 in the objective lens are both arranged on the lens holder 17; the lens holder 17 is connected to the curved barrel 6 through the guide pin 7.
[0033] Specifically, the guide pin 7 is divided into a connecting portion 7a and a guiding portion 7b, the connecting portion 7a is connected to the lens holder 17, and the guiding portion 7b is placed in the curved tube 6; preferably, the guiding portion 7b is a cylindrical structure; at the same time, a plurality of guiding grooves 6a cooperating with the guiding portion 7b are provided in the curved tube 6, and the diameter of the guiding portion 7b is slightly smaller than the width of the guiding groove 6a, thereby, the guiding portion 7b is made to move smoothly as a whole through the guiding groove 6a, driving the lens holder 17 to move, thereby realizing the precise movement of the lens.
[0034] When in use, the curved tube 6 is rotated by rotating the focusing hand wheel 8, and then the guide pin 7 is guided by the guide groove 6a on the curved tube 6, so that the guide pin 7 moves linearly along the optical axis direction of the zoom lens, thereby driving the second lens 2 and the third lens 3 to move, so as to adjust the focal length of the lens.
[0035] Furthermore, the position feedback device includes a position sensor 10 and a mounting seat 18. Figure 1b As shown, the mounting seat 18 is connected to the curve cylinder 6, and the mounting seat 18 can move with the rotation of the curve cylinder 6; the position sensor 10 is arranged on the mounting seat 18, which is used to collect the position data of the position feedback device to form a feedback value of the lens focal length, so as to help obtain the real-time lens focal length. The position sensor 10 can be a Hall sensor or a potentiometer. When a Hall sensor or a potentiometer is used, the feedback value is a pulse number or a resistance value.
[0036] Specifically, the curved tube 8 is connected to the mounting seat 18 through gear meshing transmission; Figure 1b As shown at B, a gear ring is arranged on the outer side of one end of the curved tube 8, and a gear matching with the gear ring is arranged at a corresponding position of the mounting seat 18, so as to realize transmission connection between the two in a gear meshing transmission manner.
[0037] When the focusing hand wheel 8 rotates, the curve cylinder 6 also rotates accordingly, so that the focal length of the zoom lens will change. At the same time, the rotation of the curve cylinder 6 will drive the position feedback device to move. At this time, the feedback value collected by the position sensor 10 installed in the mounting seat 18 will also change. The feedback value under the current focal length state is processed to obtain the current lens focal length.
[0038] Therefore, in this embodiment, a position feedback device is provided in the zoom lens, and the position feedback device is connected to the curve cylinder in a transmission manner, so that the focal position of the zoom lens can be fed back in real time.
[0039] Embodiment 2:
[0040] This embodiment provides an imaging device, such as Figure 1a and Figure 1c As shown, it includes the zoom lens, electronic dividing system, light detector 11, image display screen 14 and processing control system in embodiment 1.
[0041] The zoom lens is used to receive light information of the observed target; the electronic reticle system is used to form a cross-reticle line and adjust the position and line width of the cross-reticle line. Figure 2-4 As shown, the cross-reticle is provided with a plurality of scale lines, and the minimum scale unit (i.e., the distance between two adjacent scale lines) is referred to as the line width of the cross-reticle; further, the image display screen 14 is used to display the image of the observed target; the position sensor 10 and the electronic reticle system in the zoom lens are both interactive with the processing control system. The processing control system is used to receive the feedback value of the position sensor 10; at the same time, after processing the feedback value, it is converted into a corresponding signal and transmitted to the electronic reticle system to adjust the size of the cross-reticle.
[0042] Specifically, the processing control system includes a first processor and a second processor, the first processor can transmit data to the second processor; the first processor is used to receive the feedback value of the position sensor 10, and convert the feedback value into a focal length value consistent with the focal length of the lens; the second processor is used to receive the focal length value, and convert the focal length value into the line width of the cross-reflection line.
[0043] Furthermore, a first relationship function is preset in the first processor, and the first relationship function is used to convert the feedback value into a focal length value; a second relationship function is preset in the second processor, and the second relationship function is used to convert the focal length value into the line width of the cross-reticle. The line width of the cross-reticle can be represented by the length of the line segment, or by the number of pixels occupied by a single line width. In order to improve convenience and accuracy, the present invention preferably represents the line width of the cross-reticle by the number of pixels occupied by a single line width of the cross-reticle. At this time, the number of pixels corresponding to each line width is called the line width value, so the cross-reticle can be enlarged or reduced by increasing or decreasing the line width value.
[0044] The first relationship function is obtained by: (1) adjusting the zoom device in the imaging device, so that the second lens 2 and the third lens 3 move, the focal length of the lens changes, and obtaining the focal length value and the corresponding data of the position sensor 10 in the current focal length state; (2) repeatedly zooming the imaging device, selecting the focal length values and the feedback values of the position sensor 10 at multiple different focal lengths; (3) performing algorithmic processing on all the data obtained by (1) and (2) to obtain the first relationship function.
[0045] The second relationship function is obtained by: (1) adjusting the zoom lens of the imaging device to a short focal state, adjusting the line width of the crosshairs, so that the crosshairs and the proportion of the target object in the imaging screen are adapted to each other, such as Figure 2 Then obtain the focal length value in the short-focus state (i.e., the real-time focal length value A marked in the figure) and the line width value of the cross-reticle after adjustment; (2) as Figure 3 As shown, the lens of the imaging device is adjusted to be in a telephoto state, and the line width value of the cross-reticle is adjusted to be adapted to the proportion of the target object in the imaging screen; then the focal length value in the telephoto state (i.e., the real-time focal length value B marked in the figure) and the adjusted line width value of the cross-reticle are obtained; (3) finally, the focal length value and line width value obtained in the above (1) and (2) are fitted to obtain the corresponding relationship between the focal length value and the line width, i.e., the second relationship function. It should be noted that in this embodiment, the focal length value and line width value in the telephoto state can also be obtained first.
[0046] The present invention presets the first relationship function and the second relationship function in the processing control system so that the line width of the cross-reticle line can automatically change with the change of the proportion of the target object in the imaging picture, thereby achieving the purpose of synchronous scaling of the cross-reticle line and the target object. That is, when the proportion of the target object in the imaging picture is relatively small, the line width of the cross-reticle line is automatically reduced (i.e., the short-focus position, at this time the real-time focal length is A), such as Figure 2As shown; when the target occupies a relatively large proportion in the imaging image, the width of the crosshairs will automatically increase (i.e., the telephoto position, at which time the real-time focal length is B), as shown Figure 3 As shown in FIG. 1 ; when the proportion of the target object in the imaging image is between the short focal position and the long focal position, the focal length value C (i.e., the real-time focal length value of the zoom lens) is obtained by the first relationship function; then the line width value of the cross-reticle corresponding to the focal length value C is obtained according to the second relationship function, and finally the cross-reticle system adjusts the line width of the cross-reticle accordingly according to the line width value, as shown in FIG. Figure 4 The first relationship function and the second relationship function can ensure that the proportion of the target object to the cross-reticle line remains consistent in the imaging images at different focal lengths.
[0047] Figure 5 The feedback link diagram of the imaging device described in this embodiment is shown. When the focusing hand wheel 8 moves, the pass curve cylinder 6 will rotate, and then the second lens 2 and the third lens 3 will move, so that the focal length of the lens changes; when the focusing hand wheel 8 moves, the position feedback device also moves together, so that the feedback value collected by the position sensor 10 changes, such as the change of the pulse number or the resistance value, and the feedback value is transmitted to the processing control system, and the processing control system calls the preset first relationship function to process the feedback value, so as to obtain the focal length value of the current lens, so as to realize the real-time feedback of the zoom lens on its focal length. At this time, the first relationship function preset in the first processor is the corresponding relationship between the pulse number or the resistance value and the focal length. Next, after receiving the real-time feedback value, the first processor uses the first relationship function to calculate the corresponding focal length value at this time; then the second processor uses the second relationship function to calculate the line width value of the cross-reticle at the focal length value, that is, the number of pixels occupied by the line width, and transmits the obtained line width value to the electronic reticle system, which adjusts the line width of the electronic reticle accordingly to make the size of the cross-reticle adapt to the focal length in the current state, thereby realizing the linkage change of the cross-reticle and the focal length.
[0048] Embodiment 3:
[0049] This embodiment is different from Embodiment 2 in that the imaging device further includes a laser ranging module 9 , a battery system 12 , an eyepiece 15 and an eye mask 16 .
[0050] The laser distance measuring module 9 is used to measure the distance from the imaging device to the target object. It is arranged on the lens barrel and connected to the processing control system.
[0051] The eye mask 16 is used to protect the eyepiece 15, and the eyepiece 15 is used to enable the user to observe the target object.
[0052] In summary, the zoom lens in the present invention can be used for manual continuous zooming, which can expand the full-view search range of the imaging device while achieving zooming, and maintain the continuity of observation during the zooming process without losing the target;
[0053] Furthermore, the present invention uses a position sensor to provide feedback on the focal length change, and cooperates with a processing control system to ensure that at different focal lengths, the target object observed by the user in the eyepiece remains unchanged in proportion to the crosshairs, regardless of whether the target object becomes larger or smaller, thereby ensuring that at any focal length, the probability ranging and ballistic drop compensation functions of the imaging device can be normally implemented, thereby improving the user's aiming rate, ensuring the shooting accuracy requirements, and improving the user experience;
[0054] At the same time, the present invention uses the smallest scale unit in the cross-reticle as the line width, and the number of pixels occupied by the line width as the line width value. The size of the cross-reticle can be adjusted by increasing or decreasing the number of pixels occupied by each line width in the image display screen.
[0055] It should be noted that the technical features in the above-mentioned embodiments 1 to 3 can be combined arbitrarily, and the combined technical solutions all belong to the protection scope of the present application. And in this article, terms such as "including", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.
[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A zoom lens, comprising a lens barrel, an objective lens, a zoom device and a position feedback device, characterized in that: The zoom device includes a curved cylinder for adjusting the focal length; The position feedback device is connected to the curve cylinder and is used to obtain a feedback value for marking the real-time focal length.
2. The zoom lens according to claim 1, wherein: The position feedback device comprises: A mounting seat, which can move with the rotation of the curved cylinder; And a position sensor is arranged in the mounting seat and is used to obtain the position information of the mounting seat, thereby obtaining the feedback value.
3. The zoom lens according to claim 2, wherein: A gear ring is arranged on the outer periphery of one end of the curved cylinder, and a gear matched with the gear ring is arranged on one end of the mounting seat.
4. The zoom lens according to claim 1, wherein: The position sensor includes a Hall sensor or a potentiometer.
5. An imaging device comprising an electronic graticule system and a processing control system for forming and adjusting cross-reticle lines, characterized in that: The imaging device also includes a zoom lens as described in claims 1-4; the processing and control system is used to receive and process the feedback values, and control the electronic grading system according to the feedback values, so that the electronic grading system automatically adjusts the line width of the cross-grain lines according to the focal length of the zoom lens.
6. The imaging device according to claim 5, characterized in that The processing control system includes a first processor and a second processor; the first processor is used to receive the feedback value and convert the feedback value into a focal length value of the zoom lens; the second processor is used to receive the focal length value and convert the focal length value into a line width of the cross-reticle.
7. The imaging device according to claim 6, characterized in that The first processor is preset with a first relational function to convert the feedback value into the focal length value; the second processor is preset with a second relational function to convert the focal length value into the line width of the cross-reticle.
8. The imaging device according to claim 7, characterized in that The line width of the cross-reticle is represented by a line width value; the second relationship function is the corresponding relationship between the focal length value and the line width value.
9. The imaging device according to claim 8, characterized in that The line width value is the number of pixels occupied by the line width of the cross-reticle line.
10. The imaging device according to claim 8, wherein The second relationship function is obtained by fitting the focal length value and the line width value of the zoom lens in the short focal state and the long focal state.