Optical system of 4K fluorescence laparoscope

Abstract

The application discloses a kind of optical systems of 4K fluorescence laparoscope, belong to laparoscope technical field, including objective lens system, the side of the objective lens system is provided with relay system, the side of the relay system is provided with eyepiece system;The objective lens system includes protective window one, objective lens positive power three cemented lens, objective lens negative power double cemented lens, objective lens positive power meniscus lens, objective lens positive power double cemented lens one and objective lens positive power double cemented lens two, the present application is by setting objective lens system, relay system and eyepiece system, without spacer guarantee the air interval between lens, it reduces processing cost, also due to the reduction of workpiece, reduce the assembly error of system, ensure that from objective lens to mirror exit positive image, relay system lens group adopts double telecentric structure, which is beneficial to coupling with objective lens system and eyepiece system, and reduces distortion, does not produce additional off-axis field aberration, reduces relay lens group aperture, which is beneficial to system miniaturization.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of laparoscopes, and particularly relates to an optical system of a 4K fluorescence laparoscope. BACKGROUND

[0002] The laparoscope is similar to an electronic gastroscope and is an instrument with a micro camera.

[0003] The prior art has the following problems: 1. There are few hard tube laparoscopes with 4K imaging quality and capable of fluorescence imaging on the market, and the demand for ultra-high-definition imaging is increasing, which limits the use and affects the detection accuracy. SUMMARY

[0004] To solve the problems in the background art, the present application provides an optical system of a 4K fluorescence laparoscope, which has the characteristics of correcting chromatic aberration and realizing full high-definition fluorescence imaging.

[0005] To achieve the above-mentioned purposes, the present application provides the following technical scheme: an optical system of a 4K fluorescence laparoscope, comprising an objective lens system, a relay system arranged on the side of the objective lens system, and an ocular lens system arranged on the side of the relay system.

[0006] The objective lens system comprises a protective window one, an objective lens positive focal power three cemented lenses, an objective lens negative focal power double cemented lenses, an objective lens positive focal power meniscus lens, an objective lens positive focal power double cemented lens one, and an objective lens positive focal power double cemented lens two, wherein one side of the objective lens positive focal power three cemented lenses is provided with the protective window one, the other side of the objective lens positive focal power three cemented lenses is provided with the objective lens negative focal power double cemented lenses, the side of the objective lens negative focal power double cemented lenses is provided with the objective lens positive focal power meniscus lens, the side of the objective lens positive focal power meniscus lens is provided with the objective lens positive focal power double cemented lens one, and the side of the objective lens positive focal power double cemented lens one is provided with the objective lens positive focal power double cemented lens two.

[0007] Further, the objective lens positive focal power three cemented lenses are composed of a flat-concave negative lens, a rod lens, and a flat-convex positive lens, the three substrates of the objective lens positive focal power three cemented lenses are made of the same material, the objective lens positive focal power double cemented lens two has a concave surface facing the object side, and the objective lens positive focal power meniscus lens is in close contact with the edges of the objective lens negative focal power double cemented lenses and the objective lens positive focal power double cemented lens one.

[0008] Further, the relay system comprises a relay double cemented lens one, a double cemented rod lens, a relay three cemented lens, and a relay double cemented lens two, wherein the two ends of the relay three cemented lens are provided with the double cemented rod lens, the side of the double cemented rod lens close to the objective lens system is provided with the relay double cemented lens one, and the side of the double cemented rod lens close to the ocular lens system is provided with the relay double cemented lens two.

[0009] Further, the relay three-cemented lens and the two double-cemented rod-shaped mirrors are used in combination, the double-cemented rod-shaped mirrors and the relay three-cemented lens are added according to the use requirements, and the number is odd to ensure that the visual observation is positive.

[0010] Further, the air spacing between the two double-cemented rod-shaped mirrors and the relay three-cemented lens is the same, and the air spacing between the lenses of the relay system is the same.

[0011] Further, the eyepiece system comprises an eyepiece positive power flat-convex lens one, an eyepiece negative power double-cemented lens one, an eyepiece negative power double-cemented lens two, an eyepiece positive power flat-convex lens two and a protective window two, wherein the side of the eyepiece positive power flat-convex lens one is provided with the eyepiece negative power double-cemented lens one, the side of the eyepiece negative power double-cemented lens one is provided with the eyepiece negative power double-cemented lens two, the side of the eyepiece negative power double-cemented lens two is provided with the eyepiece positive power flat-convex lens two, and the side of the eyepiece positive power flat-convex lens two is provided with the protective window two.

[0012] Further, the convex surface of the eyepiece positive power flat-convex lens one faces the object side.

[0013] Further, the protective window two and the protective window one are both made of sapphire material.

[0014] Compared with the prior art, the beneficial effects of the present application are:

[0015] The present application sets up an objective lens system, a relay system and an eyepiece system, without the need for a spacer to ensure the air spacing between the lenses, which reduces the processing cost, reduces the assembly error of the system due to the reduction of the workpieces, ensures that the image is emitted vertically from the objective lens to the rotating mirror, the relay lens group adopts a double-telecentric structure, which is beneficial to the coupling with the objective lens system and the eyepiece system, reduces the distortion, does not produce additional off-axis field aberration, reduces the aperture of the relay lens group, and is beneficial to the miniaturization of the system; can quickly focus light, reduce the focal length of the system, improve the resolution, correct the secondary spectral chromatic aberration, the eyepiece system re-emits the light focused by the relay system as parallel light, which can make the eyes most relaxed when received by the human eye, ensures long-time use, and does not cause visual fatigue; the subsequent adapter can be used to refocus the parallel light and image on the image sensor, and then to the display screen, which is more convenient for medical staff to observe. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The figure is a structural schematic diagram of the present application;

[0017] Figure 2 The figure is a structural schematic diagram of the objective lens system of the present application;

[0018] Figure 3 Fig. 1 is a schematic diagram of the relay system structure of the present application;

[0019] Figure 4 Fig. 2 is a schematic diagram of the eyepiece system structure of the present application;

[0020] Figure 5 Fig. 3 is a MTF curve of the present application;

[0021] In the figure: 1, objective system; 11, protective window one; 12, objective positive power three cemented lenses; 13, objective negative power double cemented lenses; 14, objective positive power meniscus lens; 15, objective positive power double cemented lenses one; 16, objective positive power double cemented lenses two; 2, relay system; 21, relay double cemented lenses one; 22, double cemented rod lens; 23, relay three cemented lenses; 24, relay double cemented lenses two; 3, eyepiece system; 31, eyepiece positive power plano-convex lens one; 32, eyepiece negative power double cemented lenses one; 33, eyepiece negative power double cemented lenses two; 34, eyepiece positive power plano-convex lens two; 35, protective window two. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0023] Please refer to Figures 1-5 The present application provides the following technical solutions: an optical system of a 4K fluorescence laparoscope, comprising an objective system 1, the side of the objective system 1 being provided with a relay system 2, and the side of the relay system 2 being provided with an eyepiece system 3.

[0024] The objective system 1 comprises a protective window one 11, objective positive power three cemented lenses 12, objective negative power double cemented lenses 13, an objective positive power meniscus lens 14, objective positive power double cemented lenses one 15, and objective positive power double cemented lenses two 16. One side of the objective positive power three cemented lenses 12 is provided with the protective window one 11, the other side of the objective positive power three cemented lenses 12 is provided with the objective negative power double cemented lenses 13, the side of the objective negative power double cemented lenses 13 is provided with the objective positive power meniscus lens 14, the side of the objective positive power meniscus lens 14 is provided with the objective positive power double cemented lenses one 15, and the side of the objective positive power double cemented lenses one 15 is provided with the objective positive power double cemented lenses two 16.

[0025] Further in the present application, the objective positive power three-cemented lens 12 is composed of a plano-concave negative lens, a rod lens and a plano-convex positive lens, the three substrates of the objective positive power three-cemented lens 12 are made of the same material, the objective positive power double-cemented lens 16 has a concave surface facing the object side, the objective positive power meniscus lens 14 is in close contact with the edges of the objective negative power double-cemented lens 13 and the objective positive power double-cemented lens 15,

[0026] By adopting the above technical scheme, the plano-concave lens converges the light with a large incidence angle, greatly reduces the angle of the light incident to the rod lens, ensures the imaging of the optical system on a large field of view object, adopts the same material, prevents total reflection caused by a large difference in refractive index between the cemented substrates, reduces the light transmittance of the system, and does not need a spacer to ensure the air gap between the lenses, which reduces the processing cost and the assembly error of the system due to the reduction of the workpieces.

[0027] Further in the present application, the relay system 2 includes a relay double-cemented lens 21, a double-cemented rod lens 22, a relay three-cemented lens 23 and a relay double-cemented lens 24, wherein the two ends of the relay three-cemented lens 23 are provided with the double-cemented rod lens 22, the side close to the objective lens system 1 of the double-cemented rod lens 22 is provided with the relay double-cemented lens 21, and the side close to the ocular lens system 3 of the double-cemented rod lens 22 is provided with the relay double-cemented lens 24,

[0028] By adopting the above technical scheme, the lens group of the relay system 2 adopts a double-telecentric structure, which is beneficial to coupling with the objective lens system 1 and the ocular lens system 3 and reducing distortion, each group of relay lenses is composed of two double-cemented rod lenses 22 and the relay three-cemented lens 23 placed between the two double-cemented rod lenses 22 in a symmetrical structure, does not produce additional off-axis field aberration, and the relay double-cemented lens 21 as a field lens can reduce the angle of the light beam incident to the relay lens group, reduce the aperture of the relay lens group, and is beneficial to system miniaturization.

[0029] Further in the present application, the relay three-cemented lens 23 and the two double-cemented rod lenses 22 are used in combination, the double-cemented rod lens 22 and the relay three-cemented lens 23 are added according to the use requirement, and the number is odd to ensure that the visual observation is positive,

[0030] By adopting the above technical scheme, it is convenient to adjust according to the use requirement.

[0031] Further in the present application, the air gaps between the two double-cemented rod lenses 22 and the relay three-cemented lens 23 are the same, and the air gaps between the lenses of the relay system 2 are the same,

[0032] By adopting the technical scheme, only two lens spacers are needed to ensure the lens position of the relay lens group, which is conducive to reducing the cost and adapting to the batch production demand.

[0033] Further in the application, the eyepiece system 3 comprises an eyepiece positive power plano-convex lens 31, an eyepiece negative power doublet lens 32, an eyepiece negative power doublet lens 33, an eyepiece positive power plano-convex lens 34 and a protective window 35, wherein the side of the eyepiece positive power plano-convex lens 31 is provided with the eyepiece negative power doublet lens 32, the side of the eyepiece negative power doublet lens 32 is provided with the eyepiece negative power doublet lens 33, the side of the eyepiece negative power doublet lens 33 is provided with the eyepiece positive power plano-convex lens 34, and the side of the eyepiece positive power plano-convex lens 34 is provided with the protective window 35.

[0034] By adopting the technical scheme, the eyepiece system 3 composed of the eyepiece positive power plano-convex lens 31, the eyepiece negative power doublet lens 32, the eyepiece negative power doublet lens 33, the eyepiece positive power plano-convex lens 34 and the protective window 35 is an object side telecentric system, the central field of view and the edge field of view have relatively consistent light flux, the overall brightness of imaging tends to be consistent, and the eyepiece system 3 re-emits the light focused by the relay system 2 as parallel light, which can make the eyes most relaxed when received by the human eyes, thereby ensuring long-time use.

[0035] Further in the application, the convex surface of the eyepiece positive power plano-convex lens 31 faces the object side.

[0036] By adopting the technical scheme, the light rays are focused, and the aperture of the eyepiece negative power doublet lens 32 can be reduced.

[0037] Further in the application, the protective window 35 and the protective window 11 are both made of sapphire material.

[0038] By adopting the technical scheme, the protection is improved, the scratching is avoided, and the service life is improved.

[0039] The MTF curve of the 4k fluorescence laparoscope optical system of the application is shown in Figure 5 .

[0040] The working principle and use process of the present application: when the present application is used, according to the use requirement, the corresponding number of double-cemented rod-shaped mirrors 22 and relay three-cemented lenses 23 are installed, the positive focal power three-cemented lens 12 of the objective lens converges the light rays with a large incidence angle, greatly reduces the angle of the light rays incident to the rod mirror, and ensures the imaging of the optical system on the large field of view object, the double-cemented lens two 16 of the positive focal power of the objective lens is concave to the object side, which can reduce the height of the light rays incident to the relay double-cemented lens one 21 of the relay lens group, and reduce the aperture of the relay double-cemented lens one 21, the double-cemented lens 13 of the negative focal power of the objective lens, the meniscus lens 14 of the positive focal power of the objective lens and the double-cemented lens one 15 of the positive focal power of the objective lens are in close contact at the edges, without a spacer to ensure the air gap between the lenses, which not only reduces the processing cost, but also reduces the system assembly error due to the reduction of the workpieces, and ensures that the image is emitted vertically from the objective lens to the rotating mirror, the relay system 2 adopts a double-telecentric structure, which is beneficial to coupling with the objective lens system 1 and the eyepiece system 3, and reduces distortion, each relay lens is composed of two double-cemented rod-shaped mirrors 22 and a relay three-cemented lens 23 placed between the two double-cemented rod-shaped mirrors 22 in a symmetrical structure, without generating additional off-axis field aberration, the relay double-cemented lens one 21 acts as a field lens, which can reduce the angle of the light beam incident to the relay lens group and reduce the aperture of the relay lens group, which is beneficial to the miniaturization of the system; the relay double-cemented lens two 24 has positive focal power, which can quickly focus light, reduce the focal length of the system and improve the resolution; in the relay lens group, the relay three-cemented lens 23 corrects the secondary spectral aberration while correcting the chromatic aberration, the eyepiece system 3 composed of the positive focal power plano-convex lens one 31, the negative focal power double-cemented lens one 32, the negative focal power double-cemented lens two 33, the positive focal power plano-convex lens two 34 and the protective window two 35 is a telecentric system on the object side, the central field and the edge field light flux are relatively consistent, the overall brightness of the imaging tends to be consistent, the eyepiece system 3 re-emits the light focused by the relay system 2 as parallel light, which is received by the human eye, the parallel light can make the eyes most relaxed, ensuring long-time use without causing visual fatigue; the adapter can be used to re-focus the parallel light and image on the image sensor, and then display on the display screen, which is more convenient for medical staff to observe.

[0041] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An optical system for a 4K fluorescence laparoscopy, comprising an objective lens system (1), characterized in that: A relay system (2) is provided on the side of the objective lens system (1), and an eyepiece system (3) is provided on the side of the relay system (2). The objective lens system (1) consists of a protective window (11), a positive power cemented triplet objective lens (12), a negative power cemented doublet objective lens (13), a positive power meniscus objective lens (14), a positive power cemented doublet objective lens (15), and a positive power cemented doublet objective lens (16). A protective window (11) is provided on one side of the positive power cemented triplet objective lens (12). A negative optical power cemented doublet lens (13) is provided on the other side of the composite lens (12). A positive optical power meniscus lens (14) is provided on the side of the negative optical power cemented doublet lens (13). A positive optical power cemented doublet lens one (15) is provided on the side of the positive optical power cemented doublet lens one (15). A positive optical power cemented doublet lens two (16) is provided on the side of the positive optical power cemented doublet lens one (15). The objective lens positive power cemented triplicate lens (12) is composed of a plano-concave negative lens, a rod lens and a plano-convex positive lens. The three substrates of the objective lens positive power cemented triplicate lens (12) are all made of the same material. The concave surface of the objective lens positive power cemented doublet second (16) faces the object. The objective lens positive power meniscus lens (14) is in close contact with the edges of the objective lens negative power cemented doublet lens (13) and the objective lens positive power cemented doublet first (15). The relay system (2) consists of a first cemented doublet lens (21), a cemented doublet rod lens (22), a third cemented doublet lens (23), and a second cemented doublet lens (24). The third cemented doublet lens (23) has cemented doublet rod lenses (22) at both ends. The first cemented doublet lens (21) is located on the side of the cemented doublet rod lens (22) closest to the objective lens system (1), and the second cemented doublet lens (24) is located on the side of the cemented doublet rod lens (22) closest to the eyepiece system (3). The eyepiece system (3) consists of an eyepiece positive power plano-convex lens one (31), an eyepiece negative power cemented doublet lens one (32), an eyepiece negative power cemented doublet lens two (33), an eyepiece positive power plano-convex lens two (34), and a protective window two (35). The eyepiece positive power plano-convex lens one (31) is provided with an eyepiece negative power cemented doublet lens one (32) on its side, the eyepiece negative power cemented doublet lens one (32) is provided with an eyepiece negative power cemented doublet lens two (33) on its side, the eyepiece negative power cemented doublet lens two (33) is provided with an eyepiece positive power plano-convex lens two (34) on its side, and the eyepiece positive power plano-convex lens two (34) is provided with a protective window two (35) on its side.

2. The optical system of a 4K fluorescence laparoscopy according to claim 1, characterized in that: The relay triplet lens (23) and the two doublet rod lenses (22) are used in combination. The doublet rod lenses (22) and the relay triplet lens (23) are added in corresponding combinations according to the usage requirements, and the number is odd to ensure that the visual observation is positive.

3. The optical system of a 4K fluorescence laparoscopy according to claim 1, characterized in that: The air gap between the two cemented doublet rod lenses (22) and the relay triplet lens (23) is the same, and the air gap between each lens of the relay system (2) is the same.

4. The optical system of a 4K fluorescence laparoscopy according to claim 1, characterized in that: The convex surface of the eyepiece positive focal power plano-convex lens (31) faces the object side.

5. The optical system of a 4K fluorescence laparoscopy according to claim 1, characterized in that: Both the second protective window (35) and the first protective window (11) are made of sapphire material.

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