Wide-range high-precision diopter tube

Abstract

The wide-range high-precision diopter tube comprises an objective lens assembly, a lens tube assembly and an eyepiece assembly, the objective lens assembly comprises an objective lens barrel, an end seat and an objective lens body, the interior of the end seat is hollow, the end seat is connected with one end of the objective lens barrel, and the end seat partially extends into the objective lens barrel and is fixedly connected with the objective lens body; a chute is formed between the objective lens barrel and the end seat; wherein the objective lens body is configured to have a fixed distance from the objective lens body to an eye point of a measured eyepiece, the lens tube assembly is slidably connected with the chute, and the eyepiece assembly is fixedly connected with one end, far away from the objective lens assembly, of the lens tube assembly; due to the fact that the distance between the objective lens body and the eye point of the measured eyepiece is configured to be a fixed value, the distance between the lens tube assembly and the objective lens assembly and the distance between the eyepiece assembly and the objective lens assembly can be adjusted by sliding the lens tube assembly, and in the adjusting process, the distance between the objective lens body and the eye point of the measured eyepiece is a constant value, and therefore the diopter tube is suitable for wide-range and high-precision measurement work.

Description

Technical Field

[0001] The utility model relates to the technical field of optical products, in particular to a large-range and high-precision diopter tube. Background Art

[0002] The diopter tube is used to detect the diopter position of the eyepiece and the indication error of other diopter differentiations, the diopter adjustment range and the error of fixed diopter.

[0003] The objective lens of the existing diopter tube is fixed on the objective lens barrel. During the diopter measurement process, the objective lens will move synchronously with the objective lens barrel, which will cause the distance between the eyepoint of the measured eyepiece and the objective lens of the diopter tube to change, resulting in error and affecting the accuracy of diopter measurement. Within the measurement range of ±2.0SD, this error has little effect on the diopter measurement value. However, as the measured value increases (measured value > |±2.0SD|), the proportion of this distance will gradually increase, and the error will also gradually increase, thereby affecting the accuracy of the measurement.

[0004] In summary, existing diopter tubes cannot simultaneously possess the characteristics of a wide range and high precision. Utility Model Content

[0005] In view of this, it is necessary to provide a wide-range and high-precision diopter to solve the problem that existing diopter cannot have the characteristics of wide range and high precision at the same time.

[0006] The utility model provides a large-range, high-precision diopter tube, comprising an objective lens assembly, a lens tube assembly and an eyepiece assembly, wherein the objective lens assembly comprises an objective lens barrel, an end seat and an objective lens body, wherein the interior of the end seat is hollow and is connected to one end of the objective lens barrel, the end seat partially extends into the objective lens barrel and is fixedly connected to the objective lens body, and a slide groove is formed between the objective lens barrel and the end seat; wherein the objective lens body is configured such that the distance from the eye point of the measured eyepiece is a fixed value, the lens tube assembly is slidably connected to the slide groove, and the eyepiece assembly is fixedly connected to the end of the lens tube assembly away from the objective lens assembly.

[0007] Furthermore, the end seat includes a connecting tube, one end of which is fixedly connected to the end of the objective lens barrel, and the other end of which extends into the objective lens barrel. The connecting tube is located at the end of the objective lens barrel to form a slot, and the objective lens body is engaged with the slot. The inner wall of the mirror tube assembly slides and abuts against the outer wall of the end seat, and the outer wall of the mirror tube assembly slides and abuts against the inner wall of the objective lens barrel.

[0008] Furthermore, the end seat also includes a connecting ring, which is located outside the objective lens barrel and fixedly connected to the connecting tube. The inner diameter of the connecting ring is smaller than the inner diameter of the objective lens barrel, and the outer diameter of the connecting ring is larger than the outer diameter of the objective lens barrel. The connecting tube is threadedly connected to the objective lens barrel.

[0009] Furthermore, the objective lens assembly also includes an adjusting screw, the free end of the adjusting screw passes through a strip groove provided on the side wall of the objective lens barrel and is threadedly connected to the lens tube assembly, the adjusting screw can be rotated to a first position and a second position relative to the lens tube assembly, when the adjusting screw is rotated to the first position, the adjusting screw is spaced apart from the objective lens barrel, and the adjusting screw is slidably connected to the strip groove, when the adjusting screw is rotated to the second position, the adjusting screw abuts against the objective lens barrel, and the positions of the adjusting screw and the strip groove are relatively fixed.

[0010] Furthermore, there are two adjusting screws, and the two adjusting screws are arranged opposite to each other on the side wall of the objective lens barrel.

[0011] Furthermore, the side wall of the objective lens barrel is provided with a scale line extending along the length direction thereof, and the side wall of the objective lens barrel is provided with a display groove facing the scale line, and the display groove is connected to the sliding groove.

[0012] Furthermore, the measuring range of the scale line is -6.2SD to +6.2SD, and the minimum scale value of the scale line is 0.2SD.

[0013] Furthermore, the mirror tube assembly includes a mirror tube body and a graticule plate, one end of the mirror tube body is inserted into the slide groove and slidably connected to the slide groove, the other end of the mirror tube body is fixedly connected to the eyepiece assembly, and the graticule plate is fixedly arranged inside the mirror tube body.

[0014] Furthermore, the lens tube assembly further includes a reed installed in a groove provided on the outer wall of the lens tube body, and the reed is in sliding contact with the inner wall of the objective lens barrel.

[0015] Furthermore, the eyepiece assembly includes an eyepiece barrel and an eyepiece body. The eyepiece barrel is fixedly connected to an end of the lens tube assembly away from the objective lens assembly, and the eyepiece body is fixedly arranged inside the eyepiece barrel.

[0016] Compared with the prior art, since the distance between the objective lens body and the eye point of the measured eyepiece is a fixed value, the distance between the lens tube assembly and the eyepiece assembly to the objective lens assembly can be adjusted by sliding the lens tube assembly. During the above adjustment process, the distance between the objective lens body and the eye point of the measured eyepiece is a constant value. Therefore, the diopter tube is suitable for large-scale and high-precision measurement work. At the same time, since a sliding groove is formed between the end seat and the objective lens body to cooperate with the lens tube assembly, the sliding of the lens tube assembly can be made more stable to improve the accuracy of adjustment. In addition, by installing the objective lens body to the end of the end seat and controlling the length of the end seat, the position of the objective lens body in the objective lens barrel can be controlled. Compared with the method of directly installing the objective lens body in the objective lens barrel, the installation of the objective lens body is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall external structure of a large-range, high-precision sight tube provided by an embodiment of the present utility model;

[0018] Figure 2 A schematic diagram of the overall internal structure of a large-range, high-precision sight tube provided by an embodiment of the present utility model;

[0019] Figure 3 A schematic diagram showing the arrangement of the adjusting screws and scale lines in a large-range, high-precision diopter provided in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the installation of the reed in the large-range and high-precision diopter provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0022] like Figure 1-2 As shown, the utility model provides a large-range and high-precision diopter, including an objective lens assembly 100, a lens tube assembly 200 and an eyepiece assembly 300. The objective lens assembly 100 includes an objective lens barrel 110, an end seat 120 and an objective lens body 130. The interior of the end seat 120 is hollow and connected to one end of the objective lens barrel 110. The end seat 120 partially extends into the objective lens barrel 110 and is fixedly connected to the objective lens body 130. A slide groove is formed between the objective lens barrel 110 and the end seat 120; wherein, the objective lens body 130 is configured so that the distance from the eye point of the measured eyepiece is a fixed value, the lens tube assembly 200 is slidably connected to the slide groove, and the eyepiece assembly 300 is fixedly connected to the end of the lens tube assembly 200 away from the objective lens assembly 100.

[0023] During implementation, since the distance between the objective lens body 130 and the eye point of the eyepiece to be measured is fixed, the distance between the lens tube assembly 200 and the eyepiece assembly 300 and the objective lens assembly 100 can be adjusted by sliding the lens tube assembly 200. During the above adjustment process, the distance between the objective lens body 130 and the eye point of the eyepiece to be measured is a constant value. Therefore, the diopter tube is suitable for large-scale and high-precision measurement work. At the same time, since a sliding groove is formed between the end seat 120 and the objective lens body 130 to cooperate with the lens tube assembly 200, the sliding of the lens tube assembly 200 can be made more stable, thereby improving the accuracy of adjustment. In addition, by installing the objective lens body 130 to the end of the end seat 120 and controlling the length of the end seat 120, the position of the objective lens body 130 in the objective lens barrel 110 can be controlled. Compared with the method of directly installing the objective lens body 130 in the objective lens barrel 110, the installation of the objective lens body 130 is more convenient.

[0024] The objective lens assembly 100 in this embodiment includes an objective lens barrel 110, an end seat 120 and an objective lens body 130. The interior of the end seat 120 is hollow and is connected to one end of the objective lens barrel 110. The end seat 120 partially extends into the objective lens barrel 110 and is fixedly connected to the objective lens body 130. A slide groove is formed between the objective lens barrel 110 and the end seat 120; wherein, the objective lens body 130 is configured so that the distance from its eye point to the measured eyepiece is a constant.

[0025] The objective lens barrel 110 is a cylindrical structure for supporting the end seat 120 and the objective lens body 130 .

[0026] In one embodiment, the end seat 120 includes a connecting tube, one end of which is fixedly connected to the end of the objective lens barrel 110, and the other end of the connecting tube extends into the objective lens barrel 110. The connecting tube is located at the end of the objective lens barrel 110 to form a slot, and the objective lens body 130 is engaged with the slot. The inner wall of the lens tube assembly 200 slides and abuts against the outer wall of the end seat 120, and the outer wall of the lens tube assembly 200 slides and abuts against the inner wall of the objective lens barrel 110.

[0027] At the same time, the end base 120 also includes a connecting ring, which is located outside the objective lens barrel 110 and fixedly connected to the connecting tube. The inner diameter of the connecting ring is smaller than the inner diameter of the objective lens barrel 110, and the outer diameter of the connecting ring is larger than the outer diameter of the objective lens barrel 110. The connecting tube is threadedly connected to the objective lens barrel 110. Due to the provision of the connecting ring, during the installation of the objective lens body 130, the connecting ring abuts the end of the objective lens barrel 110, and the connecting tube is fully inserted into the objective lens barrel 110. By controlling the length of the connecting ring, the position of the objective lens body 130 within the objective lens barrel 110 can be controlled.

[0028] Of course, the end seat 120 and the objective lens barrel 110 may also be connected in other ways such as snap-fit ​​connection, which is not limited in the embodiment of the present invention.

[0029] It is understandable that the objective lens body 130 is a structure that can be imagined by those skilled in the art.

[0030] During measurement, it should be noted that the distance from the objective lens body 130 to the eye point of the measured eyepiece needs to be controlled to a constant value, that is, the objective lens barrel 110 or the end seat 120 is fixed, and the focal length is adjusted by driving the lens tube assembly 200 to slide.

[0031] like Figure 3 As shown, in order to facilitate adjustment of the position of the lens tube assembly 200 relative to the objective lens barrel 110, in one embodiment, the objective lens assembly 100 further includes an adjusting screw 140. The free end of the adjusting screw 140 passes through a strip groove 111 provided on the side wall of the objective lens barrel 110 and is threadedly connected to the lens tube assembly 200. The adjusting screw 140 can be rotated to a first position and a second position relative to the lens tube assembly 200. When the adjusting screw 140 is rotated to the first position, the adjusting screw 140 is spaced apart from the objective lens barrel 110, and the adjusting screw 140 is slidably connected to the strip groove 111. When the adjusting screw 140 is rotated to the second position, the adjusting screw 140 abuts against the objective lens barrel 110, and the positions of the adjusting screw 140 and the strip groove 111 are relatively fixed. That is, loosen the adjusting screw 140 and rotate it to the first position. At this time, the lens tube assembly 200 can slide relative to the objective lens barrel 110, thereby adjusting the position between the two; tighten the adjusting screw 140 and rotate it to the second position. At this time, the lens tube assembly 200 is fixed relative to the objective lens barrel 110.

[0032] In one embodiment, there are two adjusting screws 140, which are oppositely disposed on the sidewalls of the objective lens barrel 110. Of course, in other preferred embodiments, the number of adjusting screws 140 can be three or more. Of course, the number of adjusting screws 140 is not necessarily the more, but depends on the needs.

[0033] like Figure 3 As shown, to facilitate understanding the sliding position of the lens tube assembly 200 relative to the objective lens barrel 110, in one embodiment, a scale line 150 extending along the length of the objective lens barrel 110 is provided on the side wall of the objective lens barrel 110. A display slot 112 is provided on the side wall of the objective lens barrel 110, facing the scale line 150. The display slot 112 is connected to the slide slot. The position of the lens tube assembly 200 facing the scale line 150 can be seen in the display slot 112, thereby understanding the sliding position of the lens tube assembly 200 relative to the objective lens barrel 110.

[0034] In one embodiment, the range of the scale line 150 is -6.2SD to +6.2SD, and the minimum division value of the scale line 150 is 0.2SD. This improves the resolution and accuracy of the visual acuity measurement, and makes it easier to read and evaluate the measurement.

[0035] The mirror tube assembly 200 in this embodiment includes a mirror tube body 210 and a reticle 220. One end of the mirror tube body is inserted into a slide groove and is slidably connected to the slide groove. The other end of the mirror tube body 210 is fixedly connected to the eyepiece assembly 300, and the reticle 220 is fixedly set inside the mirror tube body 210.

[0036] It is understandable that the lens tube body 210 is a tubular structure, and the reticle 220 is a structure that can be imagined by those skilled in the art, and will not be elaborated and described in detail here.

[0037] like Figure 4 As shown, in order to improve the sliding stability between the lens tube body 210 and the objective lens assembly 100, in one embodiment, the lens tube assembly 200 further includes a reed 230, which is installed in a groove 211 opened on the outer wall of the lens tube body, and the reed 230 slides against the inner wall of the objective lens barrel 110.

[0038] The eyepiece assembly 300 in this embodiment includes an eyepiece barrel 310 and an eyepiece body 320 . The eyepiece barrel 310 is fixedly connected to one end of the lens tube assembly 200 away from the objective lens assembly 100 , and the eyepiece body 320 is fixedly disposed inside the eyepiece barrel 310 .

[0039] It is understandable that the eyepiece barrel 310 is a tubular structure, and the eyepiece body 320 is a structure that can be imagined by those skilled in the art, and no further elaboration or explanation is given here.

[0040] Compared with the prior art: since the distance between the objective lens body 130 and the eye point of the measured eyepiece is fixed, the distance between the lens tube assembly 200 and the eyepiece assembly 300 and the objective lens assembly 100 can be adjusted by sliding the lens tube assembly 200. During the above adjustment process, the distance between the objective lens body 130 and the eye point of the measured eyepiece is a constant value. Therefore, the diopter tube is suitable for large-scale and high-precision measurement work. At the same time, since a sliding groove is formed between the end seat 120 and the objective lens body 130 to cooperate with the lens tube assembly 200, the sliding of the lens tube assembly 200 can be made more stable, thereby improving the accuracy of adjustment. In addition, by installing the objective lens body 130 to the end of the end seat 120 and controlling the length of the end seat 120, the position of the objective lens body 130 in the objective lens barrel 110 can be controlled. Compared with the method of directly installing the objective lens body 130 in the objective lens barrel 110, the installation of the objective lens body 130 is more convenient.

[0041] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A large range and high precision sight tube, characterized in that: include: An objective lens assembly comprises an objective lens barrel, an end seat, and an objective lens body. The end seat is hollow and connected to one end of the objective lens barrel. The end seat partially extends into the objective lens barrel and is fixedly connected to the objective lens body. A slide groove is formed between the objective lens barrel and the end seat. The objective lens body is configured such that the distance from the eye point of the measured eyepiece is a constant value. a mirror tube assembly, which is slidably connected to the slide groove; The eyepiece assembly is fixedly connected to one end of the lens tube assembly away from the objective lens assembly.

2. The large-range and high-precision sight tube according to claim 1, characterized in that: The end seat includes a connecting tube, one end of which is fixedly connected to the end of the objective lens barrel, and the other end of which extends into the objective lens barrel. The connecting tube is located at the end of the objective lens barrel to form a slot, and the objective lens body is engaged with the slot. The inner wall of the mirror tube assembly is in sliding contact with the outer wall of the end seat, and the outer wall of the mirror tube assembly is in sliding contact with the inner wall of the objective lens barrel.

3. The large-range and high-precision sight tube according to claim 2, characterized in that: The end seat also includes a connecting ring, which is located outside the objective lens barrel and fixedly connected to the connecting tube. The inner diameter of the connecting ring is smaller than the inner diameter of the objective lens barrel, and the outer diameter of the connecting ring is larger than the outer diameter of the objective lens barrel. The connecting tube is threadedly connected to the objective lens barrel.

4. The large-range and high-precision sight tube according to claim 1, characterized in that: The objective lens assembly also includes an adjusting screw, the free end of which passes through a strip groove provided on the side wall of the objective lens barrel and is threadedly connected to the lens tube assembly. The adjusting screw can be rotated to a first position and a second position relative to the lens tube assembly. When the adjusting screw is rotated to the first position, the adjusting screw is spaced apart from the objective lens barrel, and the adjusting screw is slidably connected to the strip groove. When the adjusting screw is rotated to the second position, the adjusting screw abuts against the objective lens barrel, and the positions of the adjusting screw and the strip groove are relatively fixed.

5. The large-range and high-precision sight tube according to claim 4, characterized in that: There are two adjusting screws, and the two adjusting screws are arranged oppositely on the side wall of the objective lens barrel.

6. The large-range and high-precision sight tube according to claim 1, characterized in that: The side wall of the objective lens barrel is provided with a scale line extending along the length direction thereof, and the side wall of the objective lens barrel is provided with a display groove facing the scale line, and the display groove is connected with the sliding groove.

7. The large-range and high-precision sight tube according to claim 6, characterized in that: The measuring range of the scale line is -6.2SD to +6.2SD, and the minimum scale value of the scale line is 0.2SD.

8. The large-range and high-precision sight tube according to claim 1, characterized in that: The mirror tube assembly includes a mirror tube body and a reticle. One end of the mirror tube body is inserted into the slide groove and slidably connected to the slide groove. The other end of the mirror tube body is fixedly connected to the eyepiece assembly. The reticle is fixedly arranged inside the mirror tube body.

9. The large-range and high-precision sight tube according to claim 8, characterized in that: The lens tube assembly further comprises a reed which is installed in a groove provided on the outer wall of the lens tube body and is in sliding contact with the inner wall of the objective lens barrel.

10. The large-range and high-precision sight tube according to claim 1, characterized in that: The eyepiece assembly comprises an eyepiece barrel and an eyepiece body. The eyepiece barrel is fixedly connected to one end of the lens tube assembly away from the objective lens assembly, and the eyepiece body is fixedly arranged inside the eyepiece barrel.

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