CN215297808U

CN215297808U - Inner wall detection lens

Info

Publication number: CN215297808U
Application number: CN202121380948.6U
Authority: CN
Inventors: 周升志; 王义华
Original assignee: Wuxi Xike Photoelectric Technology Co ltd
Current assignee: Wuxi Xike Photoelectric Technology Co ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2021-12-24
Anticipated expiration: 2031-06-22

Abstract

The utility model provides an inner wall inspection camera lens, include: the lens comprises a lens barrel, a filter and a lens assembly arranged in the lens barrel. The lens cone comprises an imaging end and a light inlet end, the imaging end is provided with a light outlet, the light inlet end is provided with a first light inlet and a second light inlet which are perpendicular to each other and penetrate through each other, and the first light inlet and the lens cone are coaxially arranged; the lens component comprises a first lens, a second lens, a first concave lens, a first convex lens, a second concave lens, a second convex lens, a third convex lens and a prism; the optical filter is clamped by the lens barrel and the optical filter base arranged at the imaging end together. The utility model discloses an inner wall inspection camera lens has realized that two light paths detect simultaneously, has improved the efficiency that detects greatly, adopts the lens combination to improve the resolution ratio of formation of image simultaneously, has effectively improved the precision that detects.

Description

Inner wall detection lens

Technical Field

The utility model relates to an optical lens field, more specifically relates to an inner wall detection camera lens.

Background

In the aspect of detecting the inner wall, the detection is difficult and the efficiency is not high by using the conventional detection instrument because the inner wall is narrow. Therefore, a vision system is usually used to assist in the measurement, which improves the simplicity and accuracy of the measurement.

Chinese utility model patent publication No. CN212159614U discloses a device for detecting inner holes, which comprises a barrel and an optical assembly fixedly arranged at one end of the barrel. An optical system is formed by combining a plurality of groups of cemented lenses, and flaw detection of the inner wall is realized. This a device for hole detects can only the unilateral advance light formation of image, and detection efficiency is not high, and simultaneously, the resolution ratio of formation of image is not high, and the inner wall that the required precision is high does not reach the detection requirement.

In view of the above, there is a need for an improved inner wall detection device in the prior art to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to disclose an inner wall detection camera lens to in solving the background art, current detection camera lens detection efficiency is low and current detection camera lens imaging resolution is low problem.

In order to achieve the above object, the utility model provides an inner wall detection lens, include: the lens assembly comprises a lens barrel, a light filter and a lens assembly coaxially arranged in the lens barrel;

the lens barrel comprises an imaging end and a light inlet end, the imaging end is provided with a light outlet, the light inlet end is provided with a first light inlet and a second light inlet which are perpendicular to each other and penetrate through, the first light inlet and the lens barrel are coaxially arranged, the lens assembly comprises a first lens, a second lens, a first concave lens, a first convex lens, a second concave lens, a second convex lens, a third convex lens and a prism which are sequentially arranged from the imaging end to the light inlet end, the optical filter is clamped by the lens barrel and an optical filter base arranged at the imaging end together, and the optical filter and the lens assembly are coaxially arranged.

As the utility model discloses a further, first lens include first bellying and first sunken face in proper order to advancing the light end by the formation of image end.

As a further aspect of the present invention, the radian of the first convex surface is 0.73rad, and the radian of the first concave surface is-0.18 rad.

As a further aspect of the present invention, the second lens includes a second convex surface and a second concave surface in order from the imaging end to the light inlet end.

As a further aspect of the present invention, the radian of the second convex surface is 0.77rad, and the radian of the second concave surface is-0.95 rad.

As a further aspect of the present invention, the prism is disposed at the intersection of the first light inlet and the second light inlet.

As a further aspect of the present invention, the optical filter base is connected to the lens barrel.

Compared with the prior art, the beneficial effects of the utility model are that: the lens assembly comprising the first lens, the second lens, the first concave lens, the first convex lens, the second concave lens, the second convex lens, the third convex lens and the prism is coaxially arranged in the lens barrel, meanwhile, the lens barrel is provided with a light outlet, a first light inlet and a second light inlet, and a light filter is arranged at the light outlet of the lens barrel. The two light paths are detected simultaneously, the detection efficiency is greatly improved, the imaging resolution is improved by adopting the lens combination, and the detection precision is effectively improved.

Drawings

Fig. 1 is a schematic structural view of an inner wall detection lens disclosed in the present invention;

fig. 2 is a schematic diagram of a light path of the inner wall detection lens disclosed in the present invention.

Detailed Description

The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the functions, methods, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.

Please refer to fig. 1 to 2, which illustrate a specific embodiment of an inner wall detection lens according to the present invention.

An inner wall detection lens disclosed in this embodiment includes: a lens barrel 10, a filter 21, and a lens assembly provided in the lens barrel 10.

Specifically, referring to fig. 1, the lens barrel 10 has an imaging end 101 and a light entrance end 102, and the imaging end 101 has a light exit. The light input end 102 is provided with a first light input port 104 and a second light input port 103 which are perpendicular to each other and are intersected with each other, wherein the first light input port 104 is coaxially arranged with the lens barrel 10.

The lens assembly comprises a first lens 11, a second lens 12, a first concave lens 13, a first convex lens 14, a second concave lens 15, a second convex lens 16, a third convex lens 17 and a prism 18 which are coaxially arranged from an imaging end 101 to a light inlet end 102 in sequence. The lens barrel 10 comprises a first section 105, a second section 106 and a third section 107, wherein the diameter of the second section 106 is smaller than that of the first section 105, and the diameter of the third section 107 is larger than that of the first section 105, and the wall thickness is thicker. The first lens 11 and the second lens 12 are disposed in a first section 105 of the lens barrel 10, the first concave lens 13, the first convex lens 14, the second concave lens 15 and the second convex lens 16 are disposed in a second section 106 of the lens barrel 10, the third convex lens 17 and the prism 18 are disposed in a third section 107 of the lens barrel 10, wherein the prism 18 is disposed at a crossing position of the first light inlet 104 and the second light inlet 103, the first light inlet 104 and the second light inlet 103 are respectively opposite to two adjacent end surfaces of the prism 18, that is, an intersection point of an axis a of the first light inlet 104 and an axis b of the second light inlet 103 is located on an axis of the prism 18. The lenses in the lens assembly are spaced apart using a spacer ring while the lenses are held in place at the imaging end 101 using a lens clamping ring 19.

The first lens 11 includes a first convex surface and a first concave surface in order from the imaging end 101 to the light entrance end 102. Wherein, the radian of the first convex surface is 0.73rad, and the radian of the first concave surface is-0.18 rad. The second lens 12 includes a second convex surface and a second concave surface in order from the imaging end 101 to the light entrance end 102. Wherein, the radian of the second convex surface is 0.77rad, and the radian of the second concave surface is-0.95 rad.

The light outlet of the lens barrel 10 is provided with a filter 21 for filtering stray light, the filter 21 is clamped by the lens barrel 10 and a filter base 20 arranged at the imaging end 101, and meanwhile, a filter pressing ring 22 is arranged at the port of the imaging end 101 of the lens barrel 10 for fixing the filter 21. The filter base 20 is fastened to the outer wall of the lens barrel 10. The filter 21 is arranged coaxially with the lens assembly.

Referring to fig. 2, to explain the application of the present embodiment specifically, the first light ray 30 is incident from the first light inlet 104, and the second light ray 31 is incident from the second light inlet 103. The perpendicular to the illuminated surface of the first light ray 30 forms an angle α 1 with the horizontal line, and the perpendicular to the illuminated surface of the second light ray 31 forms an angle α 2 with the vertical line, where α 1 and α 2 are both 25.84 °. The first light ray 30 and the second light ray 31 are converged after passing through the prism 18, refracted by the prism combination and filtered by the optical filter 21 to form a light ray 32 to be emitted from the light outlet. Light ray 32 is imaged onto surface 40, and surface 40 is at an angle β to the horizontal, β being 33 °. The resolution of the inner wall detection lens shown in this embodiment is 145lp/mm (the object resolution reaches 19 um). The working light is visible light, and the working wavelength is 450-650 nm.

The utility model discloses an inner wall inspection camera lens, through adopting the lens subassembly that includes first lens 11, second lens 12, first concave lens 13, first convex lens 14, second concave lens 15, second convex lens 16, third convex lens 17 and prism 18 of coaxial setting in lens cone 10, lens cone 10 sets up out light mouthful simultaneously, first light mouthful 104 and second light mouthful 103 of advancing to light mouthful department at lens cone 10 sets up light filter 21. The two light paths are detected simultaneously, the detection efficiency is greatly improved, the imaging resolution is improved by adopting the lens combination, and the detection precision is effectively improved.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An inner wall detection lens, comprising: the lens comprises a lens barrel, a light filter and a lens assembly arranged in the lens barrel;

the lens cone comprises an imaging end and a light inlet end, the imaging end is provided with a light outlet, the light inlet end is provided with a first light inlet and a second light inlet which are perpendicular to each other and penetrate through each other, and the first light inlet and the lens cone are coaxially arranged;

the lens assembly comprises a first lens, a second lens, a first concave lens, a first convex lens, a second concave lens, a second convex lens, a third convex lens and a prism which are sequentially arranged from an imaging end to a light inlet end;

the optical filter is clamped by the lens barrel and the optical filter base arranged at the imaging end together, and the optical filter and the lens assembly are coaxially arranged.

2. The inner wall detection lens according to claim 1, wherein the first lens comprises a first convex surface and a first concave surface in sequence from the imaging end to the light entrance end.

3. The inner wall detection lens according to claim 2, wherein the radian of the first convex surface is 0.73rad, and the radian of the first concave surface is-0.18 rad.

4. The inner wall detection lens according to claim 1, wherein the second lens comprises a second convex surface and a second concave surface in sequence from the imaging end to the light entrance end.

5. The inner wall detection lens according to claim 4, wherein the radian of the second convex surface is 0.77rad, and the radian of the second concave surface is-0.95 rad.

6. The lens for inspecting inner walls as claimed in claim 1, wherein the prism is disposed at the intersection of the first light inlet and the second light inlet.

7. The inner wall detection lens according to claim 1, wherein the filter base is snap-fitted to the lens barrel.