3D scanner lens focusing device

Abstract

The utility model discloses a 3D scanner lens focusing device, and relates to the field of optical lenses. The utility model provides a 3D scanner lens focusing device, which comprises a 3D scanner, and is characterized in that the 3D scanner comprises two to-be-focused lenses which are arranged at an interval; the two resolution units are arranged at an interval, the two resolution units are in one-to-one correspondence with the two to-be-focused lenses, and the to-be-focused lenses are arranged towards the resolution units; the resolution unit comprises two resolution plates which are arranged at an interval along the shooting direction of the lens. According to the device, the definition of the to-be-focused lens at the front and back depth of field can be evaluated through imaging of a plurality of resolution plates so as to evaluate whether the focal length position is appropriate or not, so that the measurement precision of the 3D scanner within the full depth of field is ensured, and the focusing efficiency and the focusing effect are improved.

Description

Technical Field

[0001] The utility model relates to the field of optical lenses, and in particular to a 3D scanner lens focusing device. Background Art

[0002] In the field of precision manufacturing, high-precision 3D scanners play an important role, and the focusing accuracy of the 3D scanner's lens directly affects the accuracy of precision instruments.

[0003] The mainstream focusing method now is to find the clearest image position by adjusting the front and rear focus positions of the focusing lens. However, due to the focal depth of the lens, the clearest focus position is within a focusing range. For 3D scanners, since the measurement distance is within a range, the front and rear position changes of the focus position will directly lead to huge changes in clarity within the front and rear depth of field measurement range. Therefore, this method cannot accurately focus the lens of the 3D scanner. Utility Model Content

[0004] The purpose of the utility model is to provide a 3D scanner lens focusing device, which can utilize multiple resolution plate imaging to evaluate the clarity of the lens to be focused at multiple positions, thereby ensuring the measurement accuracy of the 3D scanner within the full depth range and improving the focusing efficiency and focusing effect.

[0005] The embodiment of the utility model is achieved as follows:

[0006] In one aspect of the utility model, a 3D scanner lens focusing device is provided, comprising a 3D scanner, wherein the 3D scanner comprises two lenses to be focused that are spaced apart from each other; further comprising two resolution units spaced apart from each other, the two resolution units corresponding one to one with the two lenses to be focused, the lenses to be focused are arranged toward the resolution units; the resolution unit comprises two resolution plates spaced apart from each other along the shooting direction of the lens.

[0007] Optionally, the lens to be focused includes a first lens to be focused and a second lens to be focused that are arranged at intervals; the resolution unit includes a first resolution unit arranged opposite to the first lens to be focused, and a second resolution unit arranged opposite to the second lens to be focused; the first resolution unit includes a first resolution plate and a second resolution plate arranged in sequence along the shooting direction of the lens, and the first resolution plate and the second resolution plate are arranged at intervals; the second resolution unit includes a third resolution plate and a fourth resolution plate arranged in sequence along the shooting direction of the lens, and the third resolution plate and the fourth resolution plate are arranged at intervals.

[0008] Optionally, the first resolution board and the third resolution board are respectively arranged in the front depth of field of the first lens to be focused and the second lens to be focused; the second resolution board and the fourth resolution board are respectively arranged in the back depth of field of the first lens to be focused and the second lens to be focused.

[0009] Optionally, the first lens to be focused and the second lens to be focused are located at the same horizontal height; the first resolution board and the third resolution board are located at the same horizontal height; the second resolution board and the fourth resolution board are located at the same horizontal height.

[0010] Optionally, the 3D scanner lens focusing device also includes a first mounting plate and a second mounting plate that are spaced apart, the first resolution plate and the third resolution plate are respectively arranged on the surface of the first mounting plate, and the second resolution plate and the fourth resolution plate are respectively arranged on the surface of the second mounting plate.

[0011] Optionally, the height of the first mounting plate is lower than the height of the second mounting plate.

[0012] Optionally, the 3D scanner lens focusing device further includes a base plate, and the first mounting plate and the second mounting plate are vertically arranged to the base plate.

[0013] Optionally, the 3D scanner lens focusing device further includes a bracket, and the 3D scanner is mounted on an end of the bracket.

[0014] Optionally, the bracket includes a base and a support column, the base is arranged on the bottom plate, the support column is vertically arranged on the base, and the 3D scanner is mounted on one end of the support column away from the base.

[0015] Optionally, the model of the resolution board is a 1951 resolution board or an ISO12233 resolution test card.

[0016] The beneficial effects of the utility model include:

[0017] The present application provides a 3D scanner lens focusing device, comprising a 3D scanner, the 3D scanner comprising two lenses to be focused arranged at intervals; further comprising two resolution units arranged at intervals, the two resolution units corresponding to the two lenses to be focused one by one, the lenses to be focused are arranged toward the resolution units; the resolution unit comprises two resolution plates arranged at intervals along the shooting direction of the lens. The device can use multiple resolution plates to image and evaluate the clarity of the lenses to be focused in the front and rear depths of field to evaluate whether the focal length position is appropriate, thereby ensuring the measurement accuracy of the 3D scanner within the full depth range, and improving the focusing efficiency and focusing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1One of the structural schematic diagrams of the 3D scanner lens focusing device provided by an embodiment of the utility model;

[0020] Figure 2 The second structural diagram of the 3D scanner lens focusing device provided by the embodiment of the utility model;

[0021] Figure 3 This is a third structural schematic diagram of a 3D scanner lens focusing device provided in an embodiment of the utility model.

[0022] Icon: 100-3D scanner lens focusing device; 110-3D scanner; 111-first lens to be focused; 112-second lens to be focused; 121-first resolution unit; 1211-first resolution board; 1212-second resolution board; 122-second resolution unit; 1221-third resolution board; 1222-fourth resolution board; 130-first mounting plate; 140-second mounting plate; 150-bottom plate; 160-bracket; 161-base; 162-support column. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Please refer to Figure 1 The present embodiment provides a 3D scanner lens focusing device 100, including a 3D scanner 110, wherein the 3D scanner 110 includes two lenses to be focused that are spaced apart from each other; and also includes two resolution units that are spaced apart from each other, wherein the two resolution units correspond to the two lenses to be focused one by one, and the lenses to be focused are arranged toward the resolution units; and the resolution unit includes two resolution plates spaced apart from each other along the shooting direction of the lens.

[0030] Specifically, the present application provides a 3D scanner lens focusing device 100, which includes a 3D scanner 110, and the 3D scanner 110 includes two cameras arranged at intervals to simulate the human eye to capture three-dimensional scanning data of an object. The camera includes a body and a lens to be focused mounted on the body; the 3D scanner lens focusing device 100 also includes a resolution unit for evaluating focus, and the resolution unit includes two, which correspond to the two lenses to be focused respectively, so as to facilitate focusing of the two focusing lenses respectively, and also make it easier to ensure the consistency of the resolution of the two lenses to be focused.

[0031] The resolution unit is composed of two resolution plates, which are arranged in sequence along the shooting direction of the lens and are set at intervals; the lens to be focused can refer to the two resolution plates at the same time, and quantitatively analyze and judge the resolution and focusing state of the lens to be focused while keeping the object distance unchanged. The resolution plate includes a plurality of black and white stripe units with decreasing lengths, and each black and white stripe unit corresponds to a reading; the lens to be focused can read the clarity of each stripe unit on the resolution plate, and evaluate the focus degree and resolution level of the lens through the clarity, and focus according to the clarity. Preferably, the resolution plate can be a 1951 resolution plate or an ISO12233 resolution test card, which is an internationally standard marker for measuring the MTF of the lens, avoiding differences in evaluation results caused by the measured object, so as to further improve the reliability and accuracy of the focusing result.

[0032] It should be noted that, in the embodiments of the present application, first, the lens to be focused includes a first lens to be focused 111 and a second lens to be focused 112 which are arranged at intervals; the resolution unit includes a first resolution unit 121 which is arranged opposite to the first lens to be focused 111, and a second resolution unit 122 which is arranged opposite to the second lens to be focused 112; the first resolution unit 121 includes a first resolution board 1211 and a second resolution board 1212 which are arranged in sequence along the shooting direction of the lens, and the first resolution board 1211 and the second resolution board are arranged at intervals; the second resolution unit 122 includes a third resolution board 1221 and a fourth resolution board 1222 which are arranged in sequence along the shooting direction of the lens, and the third resolution board 1221 and the fourth resolution board are arranged at intervals.

[0033] Specifically, Figure 1 As shown, the lens to be focused includes a first lens to be focused 111 and a second lens to be focused 112, and the first lens to be focused 111 and the second lens to be focused 112 are arranged at an interval; the resolution unit includes a first resolution unit 121 and a second resolution unit 122, and the first resolution unit 121 is arranged opposite to the first lens to be focused 111, and the second resolution unit is arranged opposite to the second lens to be focused 112.

[0034] The first resolution unit 121 includes a first resolution board 1211 and a second resolution board 1212, which are arranged in sequence along the shooting direction of the lens and are spaced apart; the second resolution unit 122 includes a third resolution board 1221 and a fourth resolution board 1222, which are arranged in sequence along the shooting direction of the lens and are spaced apart.

[0035] In the actual focusing process, the 3D scanner lens focusing device 100 is used as follows:

[0036] The focal length of the first lens 111 to be focused can be adjusted first to ensure that a certain black and white stripe in the first resolution plate 1211 and the second resolution plate 1212 read by the first lens 111 to be focused is as clear as possible. For example, taking the 1951 resolution plate as an example, the black and white stripe unit with a reading of 2G1 in the first resolution plate 1211 and the black and white stripe unit with a reading of 1G3 in the second resolution plate 1212 read by the first lens 111 to be focused are ensured.

[0037] Afterwards, the focal length of the second lens 112 to be focused is adjusted to ensure that a certain black and white stripe in the third resolution plate 1221 and the fourth resolution plate 1222 read by the second lens 112 to be focused is as clear as possible. For example, taking the 1951 resolution plate as an example, it is ensured that the reading in the third resolution plate 1221 read by the second lens 112 to be focused is the black and white stripe unit where 2G1 is located and the black and white stripe unit where 1G3 is located in the fourth resolution plate 1222;

[0038] Finally, the focal length of the first lens 111 to be focused and the focal length of the second lens 112 to be focused are fine-tuned simultaneously to ensure that the reading of the black and white stripe unit of the first resolution plate 1211 read by the first lens 111 to be focused is the same as the reading of the black and white stripe unit of the third resolution plate 1221 read by the second lens 112 to be focused; ensure that the reading of the black and white stripe unit of the second resolution plate 1212 read by the first lens 111 to be focused is the same as the reading of the black and white stripe unit of the fourth resolution plate 1222 read by the second lens 112 to be focused is the same, so as to ensure the consistency of the resolution of the two lenses to be focused.

[0039] Second, the first resolution board 1211 and the third resolution board 1221 are respectively arranged within the front depth of field of the first lens 111 to be focused and the second lens 112 to be focused; the second resolution board 1212 and the fourth resolution board 1222 are respectively arranged within the back depth of field of the first lens 111 to be focused and the second lens 112 to be focused. Through such an arrangement, the focusing process can evaluate whether the focal length position is appropriate in combination with the clarity of the front and back depths of field, avoid the influence of the lens depth of field, and improve the accuracy of the lens focusing of the 3D scanner 110.

[0040] Third, if Figure 1 As shown, the first to-be-focused lens 111 and the second to-be-focused lens 112 are located at the same level; the first resolution board 1211 and the third resolution board 1221 are located at the same level; the second resolution board 1212 and the fourth resolution board 1222 are located at the same level.

[0041] Specifically, the first lens 111 to be focused and the second lens 112 to be focused are located at the same horizontal height, and correspondingly, the first resolution board 1211 and the third resolution board 1221 are located at the same horizontal height, and the second resolution board 1212 and the fourth resolution board 1222 are also located at the same horizontal height, and are all arranged relative to the shooting directions of the first lens 111 to be focused and the second lens 112 to be focused, so as to further ensure the consistency of the resolution of the first lens 111 to be focused and the second lens 112 to be focused, and avoid deviations in the focusing process that lead to inaccurate focusing results.

[0042] The present application provides a 3D scanner lens focusing device 100, including a 3D scanner 110, the 3D scanner 110 includes two lenses to be focused arranged at intervals; and also includes two resolution units arranged at intervals, the two resolution units correspond to the two lenses to be focused one by one, and the lenses to be focused are arranged toward the resolution units; the resolution unit includes two resolution plates arranged at intervals along the shooting direction of the lens. The device can use multiple resolution plates to image and evaluate the clarity of the lenses to be focused in the front and rear depths of field to evaluate whether the focal length position is appropriate, thereby ensuring the measurement accuracy of the 3D scanner 110 within the full depth range, and improving the focusing efficiency and focusing effect.

[0043] In one possible implementation manner of the present application, the 3D scanner lens focusing device 100 also includes a first mounting plate 130 and a second mounting plate 140 that are spaced apart, the first resolution plate 1211 and the third resolution plate 1221 are respectively disposed on the surface of the first mounting plate 130, and the second resolution plate 1212 and the fourth resolution plate 1222 are respectively disposed on the surface of the second mounting plate 140.

[0044] Specifically, Figure 1As shown, the 3D scanner lens focusing device 100 further includes a first mounting plate 130 and a second mounting plate 140, the first mounting plate 130 and the second mounting plate 140 are arranged at intervals, the first resolution plate 1211 and the third resolution plate 1221 are respectively arranged on the plate surface of the first mounting plate 130, and are respectively arranged toward the first lens to be focused 111 and the second lens to be focused 112; the second resolution plate 1212 and the fourth resolution plate 1222 are respectively arranged on the plate surface of the second mounting plate 140, and are respectively arranged toward the first lens to be focused 111 and the second lens to be focused 112. Through the arrangement of the first mounting plate 130 and the second mounting plate 140, the resolution plates can be arranged more stably relative to the lens to be focused, and it is more convenient for the first lens to be focused 111 and the second lens to be focused 112 to read the readings in the first resolution unit 121 and the second resolution unit 122, thereby improving the accuracy of the lens focusing of the 3D scanner 110. It should be noted that two mounting plates can be set up, so that the first resolution plate 1211 and the third resolution plate 1221 are set on the same mounting plate, and the second resolution plate 1212 and the fourth resolution plate 1222 are set on another mounting plate. Of course, four mounting plates can also be set up, and each resolution is set on an independent mounting plate. The present application does not impose any restrictions on the specific setting form of the mounting plate, and corresponding adjustments can be made according to actual needs.

[0045] Furthermore, if Figure 2 and Figure 3 As shown, the height of the first mounting plate 130 is lower than that of the second mounting plate 140. Since the first lens 111 to be focused and the second lens 112 to be focused need to read the black and white stripe units on the first resolution plate 1211 and the third resolution plate 1221 on the first mounting plate 130, and also need to read the black and white stripe units on the second resolution plate 1212 and the fourth resolution plate 1222 on the second mounting plate 140, it is necessary to ensure that the resolution plates are in the shooting direction of the lens to be focused and aligned with the lens to be focused, and it is also necessary to avoid that the first mounting plate 130 blocks the second mounting plate 140, so that the lens to be focused cannot read the black and white stripe units on the second resolution plate 1212 and the fourth resolution plate 1222 on the second mounting plate 140. Therefore, by ensuring that the height of the first mounting plate 130 is lower than that of the second mounting plate 140, the focusing efficiency and focusing effect are improved.

[0046] In one possible implementation manner of the present application, the 3D scanner lens focusing device 100 further includes a base plate 150 , and the first mounting plate 130 and the second mounting plate 140 are vertically arranged to the base plate 150 .

[0047] Specifically, Figure 1 and Figure 2As shown, the 3D scanner lens focusing device 100 also includes a base plate 150, which can provide certain support for the 3D scanner 110, the first mounting plate 130 and the second mounting plate 140. The first mounting plate 130 and the second mounting plate 140 are vertically arranged with respect to the base plate 150, thereby improving the stability and reliability of the 3D scanner lens focusing device 100.

[0048] Preferably, the 3D scanner lens focusing device 100 further includes a bracket 160, and the 3D scanner 110 is mounted on the end of the bracket 160. Specifically, the bracket 160 is vertically arranged on the bottom plate 150, and the 3D scanner 110 is mounted on one end of the bracket 160 away from the bottom plate 150; through the arrangement of the bracket 160, the 3D scanner 110 can be more stably arranged relative to the first mounting plate 130 and the second mounting plate 140, ensuring that the to-be-focused lens of the 3D scanner 110 can more easily shoot the resolution plates arranged on the first mounting plate 130 and the second mounting plate 140, thereby improving the stability and reliability of the 3D scanner lens focusing device 100.

[0049] Furthermore, the bracket 160 includes a base 161 and a support column 162 . The base 161 is disposed on the bottom plate 150 . The support column 162 is vertically disposed on the base 161 . The 3D scanner 110 is mounted on one end of the support column 162 away from the base 161 .

[0050] Specifically, the bracket 160 includes a base 161 disposed on the bottom plate 150 and a support column 162 disposed on the base 161. The support column 162 is vertically disposed on the base 161, and the 3D scanner 110 is mounted on one end of the support column 162 away from the base 161. Preferably, the support column 162 can be a retractable structure, so as to adjust the relative height between the lens to be focused and the resolution board, so as to provide the accuracy of the focusing process. The setting of the base 161 can further improve the stability of the 3D scanner 110 by increasing the contact area, and prevent the 3D scanner 110 from tipping over during the focusing process.

[0051] The above description is only an optional embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0052] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.

Claims

1. A 3D scanner lens focusing device, characterized in that: The invention comprises a 3D scanner, wherein the 3D scanner comprises two lenses to be focused which are arranged at intervals; and further comprises two resolution units which are arranged at intervals, wherein the two resolution units correspond to the two lenses to be focused one by one, and the lenses to be focused are arranged toward the resolution units; and the resolution unit comprises two resolution plates which are arranged at intervals along the shooting direction of the lenses.

2. The 3D scanner lens focusing device according to claim 1, characterized in that: The lens to be focused includes a first lens to be focused and a second lens to be focused which are arranged at intervals; the resolution unit includes a first resolution unit arranged opposite to the first lens to be focused, and a second resolution unit arranged opposite to the second lens to be focused; the first resolution unit includes a first resolution board and a second resolution board which are arranged in sequence along the shooting direction of the lens, and the first resolution board and the second resolution board are arranged at intervals; the second resolution unit includes a third resolution board and a fourth resolution board which are arranged in sequence along the shooting direction of the lens, and the third resolution board and the fourth resolution board are arranged at intervals.

3. The 3D scanner lens focusing device according to claim 2, characterized in that: The first resolution board and the third resolution board are respectively arranged within the front depth of field of the first lens to be focused and the second lens to be focused; the second resolution board and the fourth resolution board are respectively arranged within the back depth of field of the first lens to be focused and the second lens to be focused.

4. The 3D scanner lens focusing device according to claim 2, characterized in that: The first lens to be focused and the second lens to be focused are located at the same horizontal height; the first resolution board and the third resolution board are located at the same horizontal height; the second resolution board and the fourth resolution board are located at the same horizontal height.

5. The 3D scanner lens focusing device according to claim 2, characterized in that: The 3D scanner lens focusing device also includes a first mounting plate and a second mounting plate that are spaced apart, the first resolution plate and the third resolution plate are respectively arranged on the surface of the first mounting plate, and the second resolution plate and the fourth resolution plate are respectively arranged on the surface of the second mounting plate.

6. The 3D scanner lens focusing device according to claim 5, characterized in that: The height of the first mounting plate is lower than the height of the second mounting plate.

7. The 3D scanner lens focusing device according to claim 5, characterized in that: The 3D scanner lens focusing device further includes a bottom plate, and the first mounting plate and the second mounting plate are arranged perpendicularly with the bottom plate.

8. The 3D scanner lens focusing device according to claim 7, characterized in that: The 3D scanner lens focusing device further includes a bracket, and the 3D scanner is mounted on an end of the bracket.

9. The 3D scanner lens focusing device according to claim 8, characterized in that: The bracket includes a base and a support column, the base is arranged on the bottom plate, the support column is vertically arranged on the base, and the 3D scanner is mounted on one end of the support column away from the base.

10. The 3D scanner lens focusing device according to claim 1, characterized in that The model of the resolution board is 1951 resolution board or ISO12233 resolution test card.

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