Spacer ring air interval detection device

Abstract

The utility model belongs to the technical field of optical lenses, and discloses a space ring air interval detection device which comprises a detection base, an auxiliary lantern ring and a detection mechanism. The detection base is provided with a first accommodating groove and a second accommodating groove formed in the groove bottom of the first accommodating groove; the auxiliary lantern ring is arranged in the first containing groove, the lens is installed in the second containing groove, the space ring is installed in the auxiliary lantern ring and abuts against the lens, and the inner diameter of the auxiliary lantern ring can be designed according to the outer diameter of the space ring. The detection mechanism is used for detecting the first distance between the central point of the lens (the central point of the lens is the highest point of the lens) and the upper end face of the space ring, and the first distance is the air interval of the space ring. According to the utility model, the auxiliary lantern ring is arranged in the first accommodating groove, and the space ring is arranged in the auxiliary lantern ring, so that the space ring does not shake during measurement, and the measurement accuracy is improved; the inner diameter of the auxiliary lantern ring can be set according to the outer diameter of the space ring so as to adapt to the working condition that the outer diameter of the space ring is smaller than that of the lens.

Description

Technical Field

[0001] The utility model relates to the technical field of optical lenses, in particular to a spacer ring air gap detection device. Background Art

[0002] Spacers are essential components in lens design. They support the front and rear lenses, ensuring a defined gap between them. The thickness of the spacer directly determines whether the gap between the front and rear lenses meets the optical design requirements. Therefore, testing the air gap in the spacer is essential.

[0003] In the prior art, a detection device includes a detection base and a detection mechanism. The detection base is provided with a first receiving groove and a second receiving groove located at the bottom of the first receiving groove. The lens is placed in the second receiving groove, and a spacer is placed in the first receiving groove and pressed against the lens. The detection mechanism measures the distance between the center point of the lens and the spacer to obtain air gap data for the spacer. However, if the outer diameter of the spacer is smaller than the outer diameter of the lens, the outer wall of the spacer cannot fit into the inner wall of the first receiving groove. During detection, the detection mechanism may cause the spacer to shake slightly, resulting in inaccurate measurement data. Utility Model Content

[0004] The purpose of the utility model is to provide a spacer ring air gap detection device, which can prevent the spacer ring from shaking during detection and improve the detection accuracy of the spacer ring air gap.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A spacer air gap detection device includes a detection base, an auxiliary ring and a detection mechanism, wherein the detection base is provided with a first accommodating groove and a second accommodating groove arranged at the bottom of the first accommodating groove, the auxiliary ring is arranged in the first accommodating groove, the lens is installed in the second accommodating groove, the spacer is installed in the auxiliary ring and presses against the lens, and the lens and the spacer are coaxially arranged, and the detection mechanism is used to detect the first distance between the center point of the lens and the upper end face of the spacer.

[0007] As an optional solution, an auxiliary pad is further included, which is arranged in the auxiliary ring, and the lower end surface of the auxiliary pad can press against the upper end surface of the spacer. The detection mechanism can detect the second distance between the upper end surface of the auxiliary pad and the center point of the lens, and the difference between the second distance and the thickness of the auxiliary pad is the first distance.

[0008] As an optional solution, the parallelism between the upper end surface and the lower end surface of the auxiliary pad is 0.002 mm.

[0009] As an optional solution, the outer wall of the auxiliary ring is provided with an outer guide section and an outer thread section, and the inner wall of the first accommodating groove is provided with an inner guide section and an inner thread section, the outer thread section is threadedly connected to the inner thread section, and the outer guide section and the inner guide section are clearance-fitted.

[0010] As an optional solution, the upper end surface of the auxiliary ring is recessed with two symmetrically arranged square notches.

[0011] As an optional solution, the detection base includes a supporting base and a cylindrical boss that are connected to each other, the diameter of the supporting base is larger than the diameter of the cylindrical boss, and the cylindrical boss is provided with the first accommodating groove and the second accommodating groove.

[0012] As an optional solution, the outer wall of the cylindrical boss is provided with two symmetrically arranged openings that are in communication with the first accommodating groove and the second accommodating groove.

[0013] As an optional solution, a sink groove is provided on the lower end surface of the support seat.

[0014] As an optional solution, the bottom of the second accommodating groove is set to a concave surface, and the lens can fit with the concave surface.

[0015] As an optional solution, a through hole penetrating the detection base is provided in the central area of ​​the concave surface.

[0016] Beneficial effects of the utility model:

[0017] The utility model provides a spacer air gap detection device, which arranges an auxiliary ring in a first accommodating groove and arranges the spacer in the auxiliary ring so that the spacer does not shake during measurement, thereby improving the measurement accuracy; and the inner diameter of the auxiliary ring can be set according to the outer diameter of the spacer, so as to be suitable for working conditions where the outer diameter of the spacer is smaller than the outer diameter of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the spacer air gap detection device provided by an embodiment of the utility model;

[0019] Figure 2 It is a structural diagram of the detection base involved in the embodiment of the present utility model;

[0020] Figure 3 It is a cross-sectional view of the detection base, lens, spacer, auxiliary ring and auxiliary pad involved in the embodiment of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the detection base, lens, spacer, auxiliary ring and auxiliary pad involved in the embodiment of the utility model.

[0022] In the picture:

[0023] 1. Detection base; 11. Support base; 111. Sink; 12. Cylindrical boss; 121. First receiving groove; 1211. Inner guide section; 1212. Internal thread section; 122. Second receiving groove; 1221. Concave surface; 1222. Through hole;

[0024] 2. Auxiliary collar; 21. External guide section; 22. External thread section; 23. Square notch;

[0025] 3. Detection mechanism; 31. Platform; 32. Column; 33. Sliding rod; 34. Height measuring instrument;

[0026] 4. Auxiliary pad;

[0027] 100, lens; 200, spacer. DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of this utility model, unless otherwise expressly specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, mechanical or electrical connections, direct or indirect connections through an intermediate medium, and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0030] In the description of the present utility model, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0032] like Figures 1-4 As shown, an embodiment of the present invention provides a spacer air gap detection device, which includes a detection base 1, an auxiliary ring 2 and a detection mechanism 3. Among them, the detection base 1 is provided with a first accommodating groove 121 and a second accommodating groove 122 provided at the bottom of the first accommodating groove 121. It can be understood that the inner diameter of the first accommodating groove 121 is larger than the inner diameter of the second accommodating groove 122; the auxiliary ring 2 is provided in the first accommodating groove 121, the lens 100 is installed in the second accommodating groove 122, the spacer 200 is installed in the auxiliary ring 2 and pressed against the lens 100, the lens 100 and the spacer 200 are coaxial, and the inner diameter of the auxiliary ring 2 can be designed according to the outer diameter of the spacer 200. When the outer diameter of the spacer 200 is smaller than the outer diameter of the lens 100, the spacer 200 can be prevented from shaking by providing the auxiliary ring 2, thereby improving the measurement accuracy; and during installation, the lens 100 is first installed in the second accommodating groove 122, and then the auxiliary ring 2 is installed in the first accommodating groove 121, so that the auxiliary ring 2 does not affect the installation of the lens 100. The detection mechanism 3 is used to detect a first distance between the center point of the lens 100 (the center point of the lens 100 is the highest point of the lens 100) and the upper end surface of the spacer 200. The first distance is the air gap of the spacer 200. In this embodiment, the lens 100 is a component that actually matches the spacer 200.

[0033] The spacer air gap detection device is configured by arranging an auxiliary ring 2 in the first accommodating groove 121 and arranging the spacer 200 in the auxiliary ring 2 so that the spacer 200 does not shake during measurement, thereby improving the accuracy of measurement; and the inner diameter of the auxiliary ring 2 can be set according to the outer diameter of the spacer 200, so as to be suitable for working conditions where the outer diameter of the spacer 200 is smaller than the outer diameter of the lens 100.

[0034] Alternatively, as Figure 3-Figure 4 As shown, the spacer air gap detection device further includes an auxiliary pad 4, which is disposed within the auxiliary collar 2. The lower end surface of the auxiliary pad 4 is capable of pressing against the upper end surface of the spacer 200. The detection mechanism 3 is capable of detecting a second distance between the upper end surface of the auxiliary pad 4 and the center point of the lens 100. The difference between the second distance and the thickness of the auxiliary pad 4 is the first distance. The provision of the auxiliary pad 4 improves measurement accuracy and stability, and the auxiliary pad 4 does not affect other components during assembly.

[0035] In this embodiment, refer to Figure 1The detection mechanism 3 includes a platform 31, a column 32, a sliding rod 33 and a height measuring instrument 34. The column 32 is vertically arranged on the platform 31, one end of the sliding rod 33 is slidably connected to the column 32, and the height measuring instrument 34 is arranged at the other end of the sliding rod 33. The detection base 1 is arranged on the platform 31, and the sliding rod 33 slides on the column 32 to drive the height measuring instrument 34 to move, so that the height measuring instrument 34 can detect the distance.

[0036] Furthermore, the detection process is as follows: the detection base 1 is placed on the platform 31, and the lens 100 is placed in the second receiving groove 122 and pressed, and then the auxiliary ring 2 is installed and the spacer 200 is embedded in the auxiliary ring 2 for pressing, and the height measuring instrument 34 is driven by the sliding rod 33 to move the lowering arm to abut the highest point in the center of the lens 100, and the height measuring instrument 34 is reset to zero, and then the auxiliary pad 4 is placed and the height measuring instrument 34 is used to move down to abut the upper end surface of the auxiliary pad 4 to obtain the second distance, and the first distance is obtained by subtracting the thickness of the auxiliary pad 4 from the second distance.

[0037] In this embodiment, the parallelism between the upper end surface and the lower end surface of the auxiliary pad 4 is 0.002 mm to ensure measurement accuracy.

[0038] Alternatively, as Figure 2-Figure 3 As shown, the outer wall of the auxiliary collar 2 is provided with an outer guide section 21 and an outer thread section 22, and the inner wall of the first receiving groove 121 is provided with an inner guide section 1211 and an inner thread section 1212. When the auxiliary collar 2 is installed in the first receiving groove 121, the outer thread section 22 and the inner thread section 1212 are threadedly connected, and the outer guide section 21 is inserted into the inner guide section 1211, with a clearance fit between the outer guide section 21 and the inner guide section 1211. This structure, through the threaded connection between the outer thread section 22 and the inner thread section 1212, allows the auxiliary collar 2 to be fixed in the first receiving groove 121, preventing the auxiliary collar 2 from falling out of the first receiving groove 121 and improving stability. The cooperation between the outer guide section 21 and the inner guide section 1211 ensures that when the auxiliary collar 2 is installed in the first receiving groove 121, the outer guide section 21 is inserted into the inner guide section 1211 to achieve guidance, thereby ensuring the installation accuracy of the auxiliary collar 2.

[0039] In order to facilitate the screwing of the auxiliary ring 2 into the first receiving groove 121, the upper end surface of the auxiliary ring 2 is recessed with two symmetrically arranged square notches 23. By inserting a flat-blade screwdriver into the square notches 23, the auxiliary ring 2 can be rotated more conveniently.

[0040] Specifically, the detection base 1 includes a support base 11 and a cylindrical boss 12 that are connected to each other. The diameter of the support base 11 is larger than the diameter of the cylindrical boss 12. The cylindrical boss 12 is provided with a first accommodating groove 121 and a second accommodating groove 122. The structure is divided into the support base 11 and the cylindrical boss 12 through the detection base 1, so that when the detection base 1 is placed on the platform 31, the support base 11 contacts the platform 31, making the detection base 1 more stable.

[0041] In order to facilitate the removal of the lens 100, the outer wall of the cylindrical boss 12 is provided with two symmetrically arranged openings that are connected to the first receiving groove 121 and the second receiving groove 122. The operator can remove the lens 100 through the openings on both sides of the cylindrical boss 12, which is easy to operate.

[0042] Optionally, the bottom of the second accommodating groove 122 is set to a concave surface 1221. When the lens 100 is placed in the second accommodating groove 122, the curved surface of the lens 100 fits with the concave surface 1221, so that when the lens 100 is placed in the second accommodating groove 122, the working condition is consistent with that of the lens 100 being placed in the frame, thereby reducing measurement errors.

[0043] Furthermore, a through hole 1222 penetrating the support seat 11 is provided in the central area of ​​the concave surface 1221 , thereby reducing the complexity of machining the concave surface 1221 .

[0044] Optionally, in order to reduce the contact area between the support seat 11 and the platform 31, a recessed groove 111 is provided on the lower end surface of the support seat 11. By providing the recessed groove 111 on the lower end surface of the support seat 11, when the support seat 11 is placed on the platform 31, the contact area between the support seat 11 and the platform 31 is reduced, which can improve the fitting accuracy between the support seat 11 and the platform 31 and thereby reduce the error.

[0045] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Spacer air gap detection device, characterized in that, The invention comprises a detection base (1), an auxiliary ring (2) and a detection mechanism (3), wherein the detection base (1) is provided with a first accommodating groove (121) and a second accommodating groove (122) arranged at the bottom of the first accommodating groove (121), the auxiliary ring (2) is arranged in the first accommodating groove (121), the lens (100) is installed in the second accommodating groove (122), the spacer (200) is installed in the auxiliary ring (2) and presses the lens (100), and the lens (100) and the spacer (200) are coaxially arranged, and the detection mechanism (3) is used to detect a first distance between the center point of the lens (100) and the upper end surface of the spacer (200).

2. The spacer air gap detection device according to claim 1, characterized in that: The invention also includes an auxiliary pad (4), wherein the auxiliary pad (4) is arranged in the auxiliary ring (2), and the lower end surface of the auxiliary pad (4) can press against the upper end surface of the spacer (200), and the detection mechanism (3) can detect a second distance between the upper end surface of the auxiliary pad (4) and the center point of the lens (100), and the difference between the second distance and the thickness of the auxiliary pad (4) is the first distance.

3. The spacer air gap detection device according to claim 2, characterized in that: The parallelism between the upper end surface and the lower end surface of the auxiliary pad (4) is 0.002 mm.

4. The spacer air gap detection device according to claim 1, characterized in that: The outer wall of the auxiliary collar (2) is provided with an outer guide section (21) and an outer thread section (22); the inner wall of the first receiving groove (121) is provided with an inner guide section (1211) and an inner thread section (1212); the outer thread section (22) is threadedly connected to the inner thread section (1212); and there is a clearance fit between the outer guide section (21) and the inner guide section (1211).

5. The spacer air gap detection device according to claim 4, characterized in that: The upper end surface of the auxiliary collar (2) is recessed with two symmetrically arranged square notches (23).

6. The spacer air gap detection device according to claim 1, characterized in that: The detection base (1) comprises a supporting base (11) and a cylindrical boss (12) connected to each other, the diameter of the supporting base (11) is larger than the diameter of the cylindrical boss (12), and the cylindrical boss (12) is provided with the first accommodating groove (121) and the second accommodating groove (122).

7. The spacer air gap detection device according to claim 6, characterized in that: The outer wall of the cylindrical boss (12) is provided with two symmetrically arranged openings that are in communication with the first accommodating groove (121) and the second accommodating groove (122).

8. The spacer air gap detection device according to claim 6, characterized in that: The lower end surface of the support seat (11) is provided with a sinking groove (111).

9. The spacer air gap detection device according to claim 1, characterized in that: The bottom of the second accommodating groove (122) is configured as a concave surface (1221), and the lens (100) can be fitted with the concave surface (1221).

10. The spacer air gap detection device according to claim 9, characterized in that: A through hole (1222) penetrating the detection base (1) is provided in the central area of ​​the concave surface (1221).

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