High-definition sinoscope optical system
By employing four sets of steering units and an inverted eyepiece system in the sinus endoscope, combined with a stray aperture, the problem of achieving high-definition angular resolution in the sinus endoscope was solved, and high-quality imaging results were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-04-07
AI Technical Summary
Existing sinus endoscopes are unable to achieve the high-definition standard angular resolution, especially the entrance pupil diameter and the design of the viewing prism, which are difficult to meet the requirements. Conventional three-bar endoscope steering systems are also unable to achieve a high-definition effect of 4.8c/°.
An even-numbered array of steering units is used, increasing the number of steering units to four. By setting a stray light stop in the objective system and an inverted image in the eyepiece system, the inversion problem is compensated for, thereby improving the entrance pupil diameter and image quality of the system.
The angular resolution of the sinus endoscope system is greater than 4.8c/°, reaching the high-definition standard. The contrast is improved by eliminating stray apertures, and the system distortion is less than 10%.
Smart Images
Figure CN224085280U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of endoscope technology, specifically relating to a high-definition sinus endoscope optical system. Background Technology
[0002] An endoscope is a medical device that allows doctors to enter the body through natural orifices (such as the mouth, nose, anus, etc.) or small incisions to observe the condition of internal organs. It is an important tool for medical intervention and observation.
[0003] To ensure an upright image, current endoscopes use an odd number of steering units (rod groups) for steering, i.e., the number of rod groups is set to 1, 3, 5, 7, etc.
[0004] In conventional nasal endoscopes, it's difficult to achieve a large entrance pupil diameter. A typical 75-degree nasal endoscope with a lens diameter of 2.7-2.8mm has an entrance pupil diameter of 0.2mm, corresponding to a theoretical angular resolution of 5c / °. However, the actual angular resolution produced is generally only 3.5-4c / °, failing to meet high-definition standards. To achieve high-definition standards, an angular resolution of 4.8c / °@75 degrees is required, which is difficult to achieve with conventional three-group rod endoscope steering systems. If a five-group rod endoscope steering system is used, the design becomes extremely difficult due to the limitations of the sinus endoscope structure, including the design and fabrication of the corresponding directional prisms. Summary of the Invention
[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a high-definition sinus endoscope optical system that uses an even array of steering units to increase the entrance pupil diameter of the system, thereby achieving an angular resolution greater than 4.8c / °.
[0006] The objective of this utility model can be achieved through the following technical solution: a high-definition sinus endoscope optical system, comprising:
[0007] Objective lens system;
[0008] The steering system comprises multiple steering units arranged in sequence;
[0009] The eyepiece system, comprising the objective lens system, the steering system, and the eyepiece system arranged sequentially from the object side to the image side;
[0010] The number of steering units is even, and the eyepiece system forms an inverted image.
[0011] As a further improvement of this utility model, the objective lens system is provided with a stray light elimination barrier.
[0012] As a further improvement of this utility model, the objective lens system includes objective lens one, objective lens two, objective lens three and objective lens four arranged sequentially from the object side to the image side, the stray light elimination barrier is disposed between objective lens two and objective lens three, and the stray light elimination barrier abuts against objective lens two and objective lens three respectively.
[0013] As a further improvement of this utility model, the object side of the first objective lens is a plane and the image side is a concave surface; both the object side and the image side of the second objective lens are planes; the object side of the third objective lens is a concave surface and the image side is a convex surface; the fourth objective lens includes a cemented lens one and a lens two, the object side of the first lens is a convex surface and the image side is a concave surface, and the object side and the image side of the second lens are both convex surfaces.
[0014] As a further improvement of this utility model, the objective lens system further includes an objective lens five, which is disposed between the objective lens four and the steering system. The objective lens five includes a cemented lens three and a lens four. The object side and image side of the lens three are both concave, and the object side and image side of the lens four are both convex.
[0015] As a further improvement of this utility model, the structures of the plurality of steering units are all the same, or the structures of the plurality of steering units are identical in pairs.
[0016] As a further improvement of this utility model, the steering unit includes a first rod mirror, a steering mirror, and a second rod mirror arranged sequentially from the object side to the image side, and the steering mirror is configured as a cemented mirror group.
[0017] As a further improvement of this utility model, the object side of the first rod mirror is convex and the image side is flat; the object side of the second rod mirror is flat and the image side is convex; the turning mirror includes a glued lens five and a lens six, one of which has a convex object side and a concave image side, and the other has both a convex object side and an image side.
[0018] As a further improvement of this utility model, the eyepiece system includes eyepiece 1, eyepiece 2, eyepiece 3, eyepiece 4, eyepiece 5 and eyepiece 6 arranged sequentially from the object side to the image side, wherein eyepiece 1, eyepiece 4 and eyepiece 6 are configured as a cemented lens group.
[0019] As a further improvement of this utility model, eyepiece one includes a cemented lens seven and a lens eight, wherein the object side and image side of lens seven are both concave, and the object side and image side of lens eight are both convex; eyepiece four includes a cemented lens nine and a lens ten, wherein the object side and image side of lens nine are both convex, and the object side and image side of lens ten are both concave; eyepiece six includes a cemented lens eleven and a lens twelve, wherein the object side and image side of lens eleven are both concave, and the object side and image side of lens twelve are both convex; the object side and image side of eyepiece two, eyepiece three, and eyepiece five are all convex.
[0020] Based on the above technical solution, this utility model can produce at least the following technical effects:
[0021] 1. By using an even-numbered array of steering units to increase the entrance pupil diameter of the system, the angular resolution of the sinus endoscope system is increased to greater than 4.8c / °, achieving high-definition standards.
[0022] 2. By setting the eyepiece system to produce an inverted image, the inverted image problem caused by using an even-numbered steering unit is compensated, thereby making the entire system produce an upright image.
[0023] 3. By setting an anti-stray light barrier in the objective lens group, unwanted stray light can be blocked, allowing only imaging light to pass through, thereby improving the system contrast.
[0024] 4. By setting objective lens five, the imaging quality of the system can be further improved. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the high-definition sinus endoscope optical system of this utility model.
[0026] Figure 2 This is a schematic diagram of the objective lens system in this utility model.
[0027] Figure 3 This is a schematic diagram of the steering system in this utility model.
[0028] Figure 4 This is a schematic diagram of the eyepiece system in this utility model.
[0029] Figure 5 This is an image of the high-definition sinus endoscope optical system of this utility model.
[0030] In the diagram, 100 is the objective lens system; 110 is objective lens one; 120 is objective lens two; 130 is objective lens three; 140 is objective lens four; 141 is lens element one; 142 is lens element two; 150 is objective lens five; 151 is lens element three; 152 is lens element four; 160 is the stray light stop; 200 is the first turning unit; 210 is the first bar lens; 220 is the turning mirror; 221 is lens element five; 222 is lens element six; and 230 is the bar lens. II; 300, Second steering unit; 400, Third steering unit; 500, Fourth steering unit; 600, Eyepiece system; 610, Eyepiece 1; 611, Lens 7; 612, Lens 8; 620, Eyepiece 2; 630, Eyepiece 3; 640, Eyepiece 4; 641, Lens 9; 642, Lens 10; 650, Eyepiece 5; 660, Eyepiece 6; 661, Lens 11; 662, Lens 12. Detailed Implementation
[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indication will also change accordingly. Furthermore, in this utility model, descriptions involving "first," "second," "a," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. In this utility model, unless otherwise explicitly specified and defined, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise explicitly defined. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances. Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.
[0032] The following is a specific embodiment of this utility model, in conjunction with the appendix. Figure 1-5 The technical solution of this utility model will be further described below, but this utility model is not limited to this embodiment.
[0033] A high-definition sinus endoscope optical system includes: an objective lens system 100, a steering system, and an eyepiece system 600 arranged sequentially from the object side to the image side. The steering system includes an even number of steering units arranged sequentially. In this embodiment, four steering units are provided.
[0034] This novel high-definition sinus endoscope optical system improves the entrance pupil diameter by using four sets of steering units compared to the conventional three sets, resulting in an angular resolution greater than 4.8 c / °, meeting high-definition standards. It should be noted that in optical systems, "c / °" is a unit used to describe spatial frequency, representing the number of periods that can be resolved per degree of visual field. This unit is commonly used to measure the resolution of the human visual system or the resolving power of an imaging system.
[0035] In this high-definition sinus endoscope optical system, the objective lens system 100 has a magnification of -1X. In the steering system, each steering unit also has a magnification of -1X. Because this invention creatively uses four steering units compared to the conventional three-rod steering system, the image formed after the steering system is inverted. To compensate for the inverted image formed after using even-numbered steering units, the magnification of the eyepiece system 600 is also set to -1X, meaning the eyepiece system 600 forms an inverted image. To enable the eyepiece system 600 to be a -1X magnification inverted image system, its length needs to be increased; the length of the eyepiece system 600 needs to be at least greater than 20mm. By setting the eyepiece system 600 to form an inverted image, the inverted image problem formed after using even-numbered steering units is compensated for, thus ensuring that the entire system forms an upright image.
[0036] The objective lens system 100 of this high-definition sinus endoscope optical system includes a stray light blocking barrier 160. Specifically, the objective lens system 100 includes objective lens one 110, objective lens two 120, objective lens three 130, and objective lens four 140 arranged sequentially from the object side to the image side. The stray light blocking barrier 160 is located between objective lens two 120 and objective lens three 130, and the stray light blocking barrier 160 abuts against objective lens two 120 and objective lens three 130 respectively.
[0037] The stray light blocking shutter 160 is a device in an optical system used to reduce or eliminate the effects of stray light. The working principle of the stray light blocking shutter 160 is mainly to physically block unwanted light, ensuring that only the intended light reaches the observer's eye. This invention, by setting the stray light blocking shutter 160 in the objective lens assembly, can shield the system from unwanted stray light, allowing only the imaging light to pass through, thereby improving the system's contrast.
[0038] like Figure 2 As shown, the specific structure of the objective lens system 100 in this utility model is as follows: the object side of objective lens 110 is planar and the image side is concave; both the object side and the image side of objective lens 120 are planar; the object side of objective lens 130 is concave and the image side is convex; objective lens 140 includes cemented lens 141 and lens 2 142, the object side of lens 141 is convex and the image side is concave, and the object side and the image side of lens 2 142 are both convex.
[0039] Objective lens system 100 also includes objective lens 150, which is disposed between objective lens 140 and the steering system. Objective lens 150 includes cemented lens elements 151 and 152. Lens element 151 has concave object and image sides, while lens element 152 has convex object and image sides. Objective lenses 110, 120, 130, 144, and 150 are all spaced apart from each other.
[0040] It should be noted that the objective lens system 100 in this utility model can achieve the purpose of this utility model by using objective lens one 110, objective lens two 120, objective lens three 130 and objective lens four 140. In this embodiment, objective lens five 150 is set in order to further improve the imaging quality of the system.
[0041] The steering system of this utility model has an even number of steering units, which are four in this embodiment, namely the first steering unit 200, the second steering unit 300, the third steering unit 400 and the fourth steering unit 500. The four steering units have the same structure in pairs. Specifically, the first steering unit 200 and the third steering unit 400 have the same structure, and the second steering unit 300 and the fourth steering unit 500 have the same structure. In other embodiments, all steering units may also be configured to have the same structure.
[0042] Specifically, such as Figure 3 As shown, the steering unit includes a first rod lens 210, a steering mirror 220, and a second rod lens 230 arranged sequentially from the object side to the image side. The steering mirror 220 is configured as a cemented lens assembly. The object side of the first rod lens 210 is convex, and the image side is planar; the object side of the second rod lens 230 is planar, and the image side is convex. The steering mirror 220 includes a fifth lens 221 and a sixth lens 222 cemented together. One of the fifth lens 221 and the sixth lens 222 has a convex object side and a concave image side, while the other has convex objects and a convex image side. In this embodiment, the first rod lens 210 and the second rod lens 230 have the same structure but are arranged in opposite directions.
[0043] It should be noted that the steering unit in this utility model is not limited to the structure in this embodiment (the steering mirror 220 is disposed between the two rod mirrors), and can also be configured with other structures, such as the steering mirror 220 being disposed on one side of the steering unit, or the steering mirror 220 being disposed on both sides of the steering unit, etc.
[0044] The eyepiece system 600 of this invention includes eyepieces 610, 620, 630, 640, 650, and 660 arranged sequentially from the object side to the image side. Eyepieces 610, 640, and 660 are configured as a cemented lens group. A gap is provided between each pair of eyepieces 610, 620, 630, 640, 650, and 660.
[0045] Specifically, such as Figure 4As shown, eyepiece 1 610 includes cemented lens 7 611 and lens 8 612, where both the object and image sides of lens 7 611 are concave, and both the object and image sides of lens 8 612 are convex; eyepiece 4 640 includes cemented lens 9 641 and lens 10 642, where both the object and image sides of lens 9 641 are convex, and both the object and image sides of lens 10 642 are concave; eyepiece 660 includes cemented lens 10 6421 and lens 10 6422, where both the object and image sides of lens 10 6421 are concave, and both the object and image sides of lens 10 6422 are convex; eyepiece 2 620, eyepiece 3 630, and eyepiece 5 650 all have convex objects and images.
[0046] In summary, the objective lens system 100 of this high-definition sinus endoscope optical system has an anti-stray light barrier 160, which helps to eliminate stray light and improve the contrast of the high-definition sinus endoscope. Simultaneously, the system contains four sets of steering units, plus an eyepiece with a magnification of -1X, forming a complete sinus endoscope optical system. This system features stray light elimination and high resolution, while the system distortion is approximately 10%, achieving low distortion functionality. The specific embodiments described herein are merely illustrative examples of the spirit of this utility model. Those skilled in the art to which this utility model pertains can make various modifications or additions to the described specific embodiments or use similar methods to replace them, but without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
Claims
1. A high-definition sinus endoscope optical system, characterized in that, include: Objective lens system (100); The steering system comprises multiple steering units arranged in sequence; The eyepiece system (600) is arranged sequentially from the object side to the image side, including the objective lens system (100), the steering system, and the eyepiece system (600). The number of steering units is even, and the eyepiece system (600) forms an inverted image.
2. The high-definition sinus endoscope optical system according to claim 1, characterized in that, The objective lens system (100) is equipped with a stray light deflector (160).
3. The high-definition sinus endoscope optical system according to claim 2, characterized in that, The objective lens system (100) includes objective lens one (110), objective lens two (120), objective lens three (130) and objective lens four (140) arranged sequentially from the object side to the image side. The stray light blocking barrier (160) is disposed between objective lens two (120) and objective lens three (130), and the stray light blocking barrier (160) abuts against objective lens two (120) and objective lens three (130) respectively.
4. The high-definition sinus endoscope optical system according to claim 3, characterized in that, The object side of objective lens one (110) is planar, and the image side is concave; the object side and image side of objective lens two (120) are both planar; the object side of objective lens three (130) is concave, and the image side is convex; the objective lens four (140) includes a cemented lens one (141) and a lens two (142), the object side of lens one (141) is convex, and the image side is concave, and the object side and image side of lens two (142) are both convex.
5. The high-definition sinus endoscope optical system according to claim 3, characterized in that, The objective lens system (100) further includes objective lens five (150), which is disposed between objective lens four (140) and the steering system. Objective lens five (150) includes cemented lens three (151) and lens four (152). Lens three (151) has concave surfaces on both the object and image sides, and lens four (152) has convex surfaces on both the object and image sides.
6. The high-definition sinus endoscope optical system according to claim 1, characterized in that, The structures of the multiple steering units are all the same, or the structures of the multiple steering units are identical in pairs.
7. The high-definition sinus endoscope optical system according to claim 6, characterized in that, The steering unit includes a first rod mirror (210), a steering mirror (220), and a second rod mirror (230) arranged sequentially from the object side to the image side. The steering mirror (220) is configured as a cemented lens group.
8. The high-definition sinus endoscope optical system according to claim 7, characterized in that, The object side of the first rod lens (210) is convex and the image side is flat; the object side of the second rod lens (230) is flat and the image side is convex; the turning mirror (220) includes a cemented lens five (221) and a lens six (222), one of the lens five (221) and the lens six (222) has a convex object side and a concave image side, and the other has a convex object side and an image side.
9. The high-definition sinus endoscope optical system according to claim 1, characterized in that, The eyepiece system (600) includes eyepiece one (610), eyepiece two (620), eyepiece three (630), eyepiece four (640), eyepiece five (650) and eyepiece six (660) arranged sequentially from the object side to the image side, wherein eyepiece one (610), eyepiece four (640) and eyepiece six (660) are configured as a cemented lens group.
10. The high-definition sinus endoscope optical system according to claim 9, characterized in that, Eyepiece 1 (610) includes a cemented lens 7 (611) and a lens 8 (612), wherein the object side and image side of lens 7 (611) are both concave, and the object side and image side of lens 8 (612) are both convex; Eyepiece 4 (640) includes a cemented lens 9 (641) and a lens 10 (642), wherein the object side and image side of lens 9 (641) are both convex, and the object side and image side of lens 10 (642) are both concave; Eyepiece 6 (660) includes a cemented lens 10 (642)1 and a lens 10 (642)2, wherein the object side and image side of lens 10 (642)1 are both concave, and the object side and image side of lens 10 (642)2 are both convex; the object side and image side of eyepiece 2 (620), eyepiece 3 (630) and eyepiece 5 (650) are both convex.