Laparoscope rotating mirror structure

Abstract

The present invention relates to a laparoscope image transfer mirror structure, which is composed of two groups of completely symmetrical mirror groups, and the two groups of mirror groups are glued together in sequence along the direction of light, each group of mirror groups includes a first meniscus lens, a second meniscus lens and a rod mirror group, the concave surface of the first meniscus lens is opposite to the concave surface of the second meniscus lens and is glued together, and the convex surface of the second meniscus lens is located on one side of the rod mirror group. The numerical aperture value of the present invention can be increased to 0.14, and can meet the 4K resolution image transfer requirement rate.

Description

Technical Field

[0001] The invention relates to a rotating mirror structure, in particular to a rotating mirror structure of a laparoscope, and belongs to the technical field of medical devices. Background Art

[0002] The rigid tube laparoscope consists of three parts: objective lens, relay lens and eyepiece. Working principle: The lesion surface is illuminated by the light introduced by the optical fiber bundle, and the objective lens images the lesion surface to the rear focal plane of the objective lens. The image of the rear focal plane of the objective lens is transmitted to the vicinity of the front focal plane of the eyepiece by three or five groups of relay systems with a magnification of -1. The light beam emitted from the exit pupil of the eyepiece is close to parallel light. The human eye can observe directly at the exit pupil of the eyepiece, or use an adapter to form the image onto the focal plane detector, which can be CCD or CMOS.

[0003] Among them, the rotating mirror plays an important role in the rigid tube laparoscope. Due to the large number of them, it is an important component of the cost of the endoscope. In order to reduce costs, the rotating mirror is generally designed as 3 groups of completely identical, each group of completely symmetrical mirrors. The advantage of this design is that the cost is low, which can effectively reduce the price of the endoscope to a reasonable range. The disadvantage is that the three groups of completely symmetrical rotating mirrors will cause the axial phase difference to accumulate continuously, forming a large residual field curvature, which makes it difficult to balance the phase difference of the entire endoscope. Especially when designing a 4K ultra-high-definition resolution laparoscope, such a disadvantage becomes unbearable. Summary of the invention

[0004] The purpose of the present invention is to provide a laparoscope image-transmitting mirror structure that can increase the numerical aperture value to 0.14 and meet the 4K resolution image-transmitting requirement.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: a laparoscope rotating mirror structure, whose innovation lies in: it is composed of two groups of completely symmetrical mirror groups, and the two groups of mirror groups are glued together in sequence along the direction of light, each group of mirror groups includes a first meniscus lens, a second meniscus lens and a rod mirror group, the concave surface of the first meniscus lens is opposite to the concave surface of the second meniscus lens and is glued together, and the convex surface of the second meniscus lens is located on one side of the rod mirror group.

[0006] In the above technical solution, the rod lens group is a double-glued rod lens structure, and the rod lens group is formed by gluing two lenses, and the gluing surface of the double-glued rod lens structure is located on one side of the first aperture or away from the first aperture.

[0007] In the above technical solution, the rod lens group is formed by gluing two lenses together with ultraviolet photosensitive glue.

[0008] In the above technical solution, the rod mirror group is a three-glued rod mirror structure, and the three-glued rod mirror group is formed by gluing a rod mirror, a first lens and a second lens, and the rod mirror is located between the first lens and the second lens, the convex surface of the second meniscus lens is located on one side of the convex surface of the first lens, the concave surface of the first lens is glued to the convex surface of one end of the rod mirror, and the convex surface of the other end of the rod mirror is glued to the concave surface of the second lens, and the glued surface of the three-glued rod mirror is located on one side of the second aperture.

[0009] In the above technical solution, the rod mirror, the first lens and the second lens of the three-glued rod mirror group are glued together with ultraviolet photosensitive glue, methanol glue or optical epoxy glue.

[0010] The positive effect of the present invention is that after adopting the rotating mirror structure of the laparoscope of the present invention, since the present invention is composed of two groups of completely symmetrical mirror groups, and the two groups of mirror groups are glued together in sequence along the direction of light, each group of mirror groups includes a first meniscus lens, a second meniscus lens and a rod mirror group, the concave surface of the first meniscus lens is opposite to the concave surface of the second meniscus lens and is glued together, and the convex surface of the second meniscus lens is located on one side of the rod mirror group,

[0011] Radius of curvature thickness Material Total Variables Traditional structure 4 5 3 12 This patent 8 9 5 22

[0012] From the analysis of variables, it can be seen that the structure of the present invention adds 10 variables compared with the traditional structure, which provides more support for phase difference balance. In addition, the present invention uses two meniscus thick lenses to balance the field curvature, so that the rod-mirror combination finally produces a flat intermediate image instead of an intermediate image with a large field curvature, which reduces the burden of balancing the phase difference of the objective lens group and helps to achieve 4K resolution. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the rotating mirror structure of the first laparoscope of the present invention;

[0014] Figure 2 It is a structural schematic diagram of the rotating mirror structure of the second laparoscope of the present invention;

[0015] Figure 3 It is a schematic structural diagram of the rotating mirror structure of the third laparoscope of the present invention. DETAILED DESCRIPTION

[0016] The present invention is further described below with reference to the accompanying drawings and given embodiments, but is not limited thereto.

[0017] Example 1

[0018] like Figure 1As shown, a rotating mirror structure of a laparoscope is composed of two groups of completely symmetrical mirror groups, and the two groups of mirror groups are glued together in sequence along the direction of light, each group of mirror groups includes a first meniscus lens 1, a second meniscus lens 2 and a rod mirror group 3, the concave surface of the first meniscus lens 1 is opposite to the concave surface of the second meniscus lens 2 and glued together, and the convex surface of the second meniscus lens 2 is located on one side of the rod mirror group 3.

[0019] The rod lens group 3 is a double-glued rod lens structure, and the rod lens group 3 is formed by gluing two lenses 34 together, and the gluing surface of the double-glued rod lens structure is located on one side of the first aperture 4 .

[0020] Furthermore, the rod lens group 3 is formed by gluing two lenses together with UV-sensitive adhesive. The UV-sensitive adhesive is high temperature resistant UV-sensitive adhesive, and the high temperature resistance temperature is 125° C. to 135° C. The advantage of this design is that it can not only balance the chromatic aberration, but also ensure that the optical system does not undergo structural changes during high temperature steam sterilization.

[0021] Example 2

[0022] like Figure 2 As shown, the difference between Example 2 and Example 1 lies in: a laparoscope image transfer mirror structure, wherein the bonding surface of the double-bonded rod mirror structure is located on a side away from the first aperture 4.

[0023] The other structures of Example 2 are exactly the same as those of Example 1.

[0024] Example 3

[0025] like Figure 3 As shown, the difference between Example 3 and Example 1 lies in: a rotating mirror structure of a laparoscope, the rod mirror group 3 is a three-glued rod mirror structure, the three-glued rod mirror group is formed by gluing a rod mirror 31, a first lens 32 and a second lens 33, and the rod mirror 31 is located between the first lens 32 and the second lens 33, the convex surface of the second meniscus lens 2 is located on the convex surface side of the first lens 32, the concave surface of the first lens 32 is glued to the convex surface of one end of the rod mirror 31, and the convex surface of the other end of the rod mirror 31 is glued to the concave surface of the second lens 33, and the gluing surface of the three-glued rod mirror is located on one side of the second aperture 5.

[0026] The first lens 32 and the second lens 33 are used to reduce the chromatic aberration of the rod lens group.

[0027] Furthermore, the rod mirror 31, the first lens 32 and the second lens 33 of the three-glued rod mirror group are glued together using ultraviolet photosensitive glue, methanol glue or optical epoxy glue.

[0028] Furthermore, the high temperature resistance of the ultraviolet photosensitive glue, methanol glue or optical epoxy glue is 125° C. to 135° C. The advantage of this design is that it ensures that the rod-shaped mirror does not deform during high-temperature disinfection.

[0029] The present invention is described by the following three specific embodiments:

[0030] Radius of curvature thickness Material Total Variables Example 1 7 8 4 19 Example 2 7 8 4 19 Example 3 8 9 5 22

[0031] It can be seen from the above table that the number of variables in Examples 1 and 2 is 19, which is less than 22 in Example 3. Therefore, Example 3 has the strongest phase difference balancing ability. At the same time, due to the addition of a lens and a bonding surface, the price will be slightly higher.

[0032] It can be seen that the present invention adds two lenses with a total of 8 structural parameters, and the numerical aperture value can be increased to 0.14, meeting the image transfer requirements of 4K laparoscopes.

[0033] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A 4K laparoscope rotating mirror structure, characterized in that: The invention is composed of two groups of completely symmetrical lens groups, and the two groups of lens groups are glued together in sequence along the direction of light, each group of lens groups comprises a first meniscus lens (1), a second meniscus lens (2) and a rod lens group (3), the concave surface of the first meniscus lens (1) is opposite to the concave surface of the second meniscus lens (2) and is glued together, and the convex surface of the second meniscus lens (2) is located on one side of the rod lens group (3). The rod lens group (3) is a double-glued rod lens structure, and the rod lens group (3) is formed by gluing two lenses (34), and the gluing surface of the double-glued rod lens structure is located on one side of the first aperture (4) or on a side away from the first aperture (4). Alternatively, the rod-mirror group (3) is a three-glued rod-mirror structure, the three-glued rod-mirror structure being formed by gluing a rod-shaped mirror (31), a first lens (32) and a second lens (33), wherein the rod-shaped mirror (31) is located between the first lens (32) and the second lens (33), the convex surface of the second meniscus lens (2) is located on one side of the convex surface of the first lens (32), the concave surface of the first lens (32) is glued to the convex surface of one end of the rod-shaped mirror (31), and the convex surface of the other end of the rod-shaped mirror (31) is glued to the concave surface of the second lens (33), and the glued surface of the three-glued rod-mirror structure is located on one side of the second aperture (5).

2. The 4K laparoscope rotating mirror structure according to claim 1, characterized in that: The two lenses of the double-glued rod mirror structure are glued together by ultraviolet photosensitive glue.

3. The 4K laparoscope rotating mirror structure according to claim 1, characterized in that: The rod-shaped mirror (31), the first lens (32) and the second lens (33) of the three-glued rod-mirror structure are glued together using ultraviolet photosensitive glue, methanol glue or optical epoxy glue.

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