CN217467341U

CN217467341U - Optical endoscope

Info

Publication number: CN217467341U
Application number: CN202221510232.8U
Authority: CN
Inventors: 林敬德
Original assignee: Fujian Guangxu Technology Co ltd
Current assignee: Fujian Guangxu Technology Co ltd
Priority date: 2022-06-15
Filing date: 2022-06-15
Publication date: 2022-09-20
Anticipated expiration: 2032-06-15

Abstract

The utility model belongs to the technical field of the optical lens piece technique and specifically relates to an optical endoscope, including biconvex lens A, convex lens A, plano-convex lens, biconcave lens, biconvex lens B and the convex lens B that sets gradually from the thing side to the picture side, convex lens A and plano-convex lens constitute first cemented piece, and biconcave lens and biconvex lens B constitute the second cemented piece. The utility model discloses in, through the structure that uses biconvex lens A, convex lens A, plano-convex lens, biconcave lens, biconvex lens B and convex lens B as optical endoscope, the increase depth of field, and then enlarged the angle of vision, simultaneously, reduced the bore of endoscope, reduce the uncomfortable sense of human body.

Description

Optical endoscope

Technical Field

The utility model relates to an optical lens piece technical field specifically is an optical endoscope.

Background

Endoscopes are medical instruments that penetrate into the human body through natural orifices of the human body and observe internal structures or pathological conditions through imaged images. At present, most endoscopes have large caliber, are painful when entering a human body, and are not convenient for inspecting a lesion part with a narrow channel.

However, the conventional endoscope lens has the problems of large diameter, small depth of field and small angle of field, the smaller the diameter of the endoscope, the less uncomfortable feeling to the human body, the larger the diameter of the endoscope, the higher the production cost, the smaller the angle of field and the depth of field are important parameters for the endoscope, the smaller the angle of field affects the range of the lens observation, and the smaller the depth of field affects the depth of the lens observation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an optical endoscope, through the structure that uses biconvex lens A, convex lens A, plano-convex lens, biconcave lens, biconvex lens B and convex lens B as optical endoscope, the increase field depth, and then has enlarged the angle of vision, simultaneously, has reduced the bore of endoscope, reduces human uncomfortable and feels to solve the problem of proposing among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

an optical endoscope comprises a double convex lens A, a plano-convex lens, a double concave lens, a double convex lens B and a convex lens B which are arranged in sequence from an object side to an image side, wherein the convex lens A and the plano-convex lens form a first glue assembly, and the double concave lens and the double convex lens B form a second glue assembly.

Preferably, the first glue element has a focus distance in the absolute range of 0.3mm to 50 mm.

Preferably, the absolute value of the focal length of the second cemented part ranges from 0.3mm to 50 mm.

Preferably, each of the lenticular lens a, the convex lens a, the plano-convex lens, the biconcave lens, the lenticular lens B, and the convex lens B is one of a spherical surface and an aspherical surface.

Preferably, the focal length of the lenticular lens a, the convex lens a, the plano-convex lens, the biconcave lens, the lenticular lens B, and the convex lens B ranges from 0.3mm to 80mm in absolute value.

By the above technical scheme the utility model provides a can see out, the utility model provides a pair of optical endoscope, beneficial effect is: by using the biconvex lens A, the convex lens A, the plano-convex lens, the biconcave lens, the biconvex lens B and the convex lens B as the structure of the optical endoscope, the depth of field is increased, the field angle is further enlarged, meanwhile, the caliber of the endoscope is reduced, and the discomfort of a human body is reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of an optical endoscope according to the present invention;

fig. 2 is a schematic view of an optical endoscope according to the present invention;

FIG. 3 is a comparison diagram of a transfer function diagram of an optical endoscope according to the present invention;

fig. 4 is a diagram comparing distortion diagrams of an optical endoscope according to the present invention.

In the figure: 1. a lenticular lens A; 2. a convex lens A; 3. a plano-convex lens; 4. a biconcave lens; 5. a lenticular lens B; 6. and a convex lens B.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

For better understanding of the above technical solutions, the following detailed descriptions will be provided in conjunction with the drawings and the detailed description of the present invention.

As shown in fig. 1 to 4, an embodiment of the present invention provides an optical endoscope, which includes a biconvex lens a1, a convex lens a2, a plano-convex lens 3, a biconcave lens 4, a biconvex lens B5, and a convex lens B6, which are sequentially disposed from an object side to an image side, wherein the convex lens a2 and the plano-convex lens 3 constitute a first adhesive member, and the biconcave lens 4 and the biconvex lens B5 constitute a second adhesive member.

In the structure, the absolute value range of the focal length of the first gluing part is 0.3mm-50 mm.

In the structure, the absolute value range of the focal length of the second gluing part is 0.3mm-50 mm.

In the above configuration, each lens element of the lenticular lens a1, the convex lens a2, the plano-convex lens 3, the biconcave lens 4, the lenticular lens B5, and the convex lens B6 is one of a spherical surface and an aspherical surface.

In the above structure, the absolute value of the focal lengths of the lenticular lens a1, the convex lens a2, the plano-convex lens 3, the biconcave lens 4, the lenticular lens B5, and the convex lens B6 is in the range of 0.3mm to 80 mm.

Further, the focal length f1 of the biconvex lens a1 is 68.34mm, the air space is 0.1mm, the focal length f2 of the convex lens a2 is 5.79mm, the focal length f3 of the planoconvex lens is 13.96mm, the air space is 0.15mm, the focal length f4 of the biconcave lens 4 is-1.08 mm, the focal length f5 of the biconvex lens B5 is 1.42mm, the air space is 0.1mm, the focal length f6 of the convex lens B6 is 3.9mm, the air space is 2.37mm, and the absolute value of the focal length of all the lenses ranges from 0.3mm to 80 mm:

the structure of each lens is as follows:

lenticular lens 1: r1-38.09 mm, R2-191.9 mm, Nd-1.69, Vd-49.2, D-1.5 mm;

convex lens a 2: r1 ═ 5.42mm, R2 ═ 1.2mm, Nd ═ 1.57, Vd ═ 56.1, and D ═ 1 mm;

plano-convex lens 3: r1 ═ 1.2mm, R2 ═ infinity mm, Nd ═ 1.65, Vd ═ 39.5, and D ═ 0.57 mm;

biconcave lens 4: r1 ═ 0.97mm, R2 ═ 1.32mm, Nd ═ 1.85, Vd ═ 30.1, and D ═ 0.22 mm;

lenticular lens B5: r1 ═ 1.32mm, R2 ═ -1.06mm, Nd ═ 1.79, Vd ═ 47.5, and D ═ 0.515 mm;

convex lens B6: r1 ═ 3.23mm, R2 ═ 36.71mm, Nd ═ 1.9, Vd ═ 37.1, and D ═ 0.72 mm;

wherein R1 represents the radius of curvature of the lens' front surface in mm; r2 denotes the radius of curvature of the rear surface of the lens in mm; nd represents a refractive index of the lens material with respect to d light (wavelength of 587.6 nm); vd denotes the abbe number of the lens material with respect to d-light.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An optical endoscope comprising a biconvex lens a (1), a convex lens a (2), a plano-convex lens (3), a biconcave lens (4), a biconvex lens B (5), and a convex lens B (6) arranged in this order from an object side to an image side, characterized in that: convex lens A (2) and plano-convex lens (3) constitute first cemented piece, biconcave lens (4) and biconvex lens B (5) constitute second cemented piece.

2. An optical endoscope according to claim 1 and also comprising: the absolute value range of the focal length of the first gluing part is 0.3mm-50 mm.

3. An optical endoscope according to claim 1 and also comprising: the absolute value range of the focal length of the second gluing part is 0.3mm-50 mm.

4. An optical endoscope according to claim 1 and also comprising: each lens of the biconvex lens A (1), the convex lens A (2), the plano-convex lens (3), the biconcave lens (4), the biconvex lens B (5) and the convex lens B (6) is one of a spherical surface and an aspherical surface.

5. An optical endoscope according to claim 1 and also comprising: the focal length absolute value range of the biconvex lens A (1), the convex lens A (2), the plano-convex lens (3), the biconcave lens (4), the biconvex lens B (5) and the convex lens B (6) is 0.3mm-80 mm.