CN116407060A - Objective lens module, endoscope and endoscope imaging device - Google Patents

Abstract

The invention relates to an objective lens module, an endoscope and an endoscope imaging device. The objective lens module comprises a lens body, a first objective lens and two second objective lenses. The first objective lens is arranged at the end part of the lens body and provided with a first light incident surface. The second objective is arranged at the end part of the objective body and is provided with a second light incident surface, the two second light incident surfaces are respectively arranged at two sides of the first light incident surface, and the included angles between the two second light incident surfaces and the first light incident surface are equal and are all between 60 degrees and 90 degrees. The objective lens module greatly improves the field of view range of the objective lens module, can further meet the requirement of large-scale image capturing, and is beneficial to diagnosis or treatment.

Description

Objective lens module, endoscope and endoscope imaging device

Technical Field

The present invention relates to the technical field of endoscopes, and in particular, to an objective lens module, an endoscope, and an endoscope imaging apparatus.

Background

The front end of the body of a conventional endoscope is generally provided with an objective lens for acquiring images of internal tissues of a human body so as to diagnose or treat diseases of the human body. Conventional endoscopes are generally classified into hard tube endoscopes and flexible tube endoscopes, and the tube body of the hard tube endoscopes is generally made of hard materials and cannot be bent, and is generally used for diagnosis or treatment of superficial and superficial parts of the human body. The tube body of the hose endoscope is usually made of flexible materials and can be bent, so that the hose endoscope can enter a narrow or bent space and is suitable for different application scenes. However, the current endoscope has a limited field of view, and is difficult to meet the requirement of large-scale image capturing, and is not beneficial to diagnosis or treatment.

Disclosure of Invention

Based on this, it is necessary to provide an objective lens module, an endoscope, and an endoscope imaging apparatus, which solve the problem that the field of view of the conventional endoscope is limited.

An objective lens module, comprising:

a mirror body;

the first objective lenses are arranged at the end parts of the lens bodies and are provided with first light incident surfaces; and

the two second objective lenses are arranged at the end parts of the objective body and are provided with second light incident surfaces, the two second light incident surfaces are respectively arranged at two sides of the first light incident surface, and the included angles between the two second light incident surfaces and the first light incident surface are equal and are all between 60 degrees and 90 degrees.

In one embodiment, the first objective lens includes a first optical component and a first photosensitive element disposed on an image side of the first optical component, and the second objective lens includes a second optical component and a second photosensitive element disposed on an image side of the second optical component;

the two second photosensitive elements are inclined or perpendicular to the first photosensitive element and are positioned on one side of the first photosensitive element, which is away from the first light incident surface.

In one embodiment, the positions of the two second photosensitive elements are within a radial range corresponding to the first objective lens.

In one embodiment, the second optical assembly includes at least one turning element to deflect the optical path of the second optical assembly toward a side proximate to the first objective lens.

In one embodiment, the second optical component includes an optical waveguide and a lens component from an object side to an image side along an optical axis, the lens component includes at least one lens with refractive power, and the optical axis of the lens component is perpendicular or oblique to the optical axis of the first optical component.

In one embodiment, the second optical component includes a lens component and a turning prism from an object side to an image side along an optical axis, and the light incident direction of the turning prism is inclined or perpendicular to the light emergent direction of the turning prism.

In one embodiment, the lens assembly comprises a first lens and a second lens spaced apart, the second optical assembly further comprises a triple glue turning prism disposed between the first lens and the second lens, and the triple glue turning prism comprises two reflective surfaces for deflecting light.

In one embodiment, the first objective lens includes a first optical component and a first photosensitive element disposed on an image side of the first optical component, and the first optical component includes at least one first steering element for deflecting an optical path so that the first photosensitive element is inclined or perpendicular to the first light incident surface.

In one embodiment, the first objective lens comprises a first front lens group with negative refractive power and a first rear lens group with positive refractive power from an object side to an image side along an optical axis; and/or the number of the groups of groups,

the second objective lens includes a second front lens group having negative refractive power and a second rear lens group having positive refractive power from an object side to an image side along an optical axis.

In one embodiment, the two second objective lenses are symmetrically disposed on both sides of the optical axis of the first objective lens.

An endoscope comprising a tube and an objective lens module as in any one of the above embodiments, wherein the tube is connected to the lens.

An endoscopic imaging device comprises a display for displaying an image acquired by the objective lens module, and an endoscope as described above.

In one embodiment, the system comprises a first display and two second displays, wherein the first display is used for displaying the image acquired by the first objective lens, each second display is used for displaying the image acquired by the corresponding second objective lens, and the two second displays are respectively arranged on two sides of the first display and are inclined to the first display.

Above-mentioned objective module is equipped with three objective, and wherein the second income plain noodles of two second objective is located the both sides of first income plain noodles of first objective respectively to all slope or perpendicular to first income plain noodles, thereby make two second objective can acquire the image of the visual field in first objective both sides, greatly promoted the visual field scope of objective module, and then can satisfy the demand of taking an image on a large scale, be favorable to diagnosis or treatment. Meanwhile, the included angles between the two second light incident surfaces and the first light incident surface are equal, so that the field of view ranges acquired by the two second objective lenses are symmetrically distributed on two sides of the first objective lens, the use habit of a user is met, the field of view range of the objective lens module is improved, the use experience of the user is improved, and diagnosis or treatment is facilitated.

Drawings

FIG. 1 is a schematic diagram of an endoscopic imaging device in some embodiments;

FIG. 2 is a schematic diagram of an objective lens module according to some embodiments;

FIG. 3 is a schematic diagram of an internal structure of an objective lens module according to some embodiments;

FIG. 4 is a schematic diagram showing the internal structure of an objective lens module according to other embodiments;

fig. 5 is a schematic view of the internal structure of the first objective lens in still other embodiments.

Wherein, 10, endoscope imaging device; 110. an endoscope; 1110. a tube body; 1120. an objective lens module; 1130. a mirror body; 1140. a first objective lens; 1141. a first light incident surface; 1142. a first optical component; 1143. a first lens assembly; 1144. a first steering element; 1145. a first photosensitive element; 1150. a second objective lens; 1151. a second light incident surface; 1152. a protective glass; 1153. a second optical component; 1154. an optical waveguide; 1155. a second lens assembly; 1156. a first lens; 1157. a second lens; 1158. a third lens; 1159. a fourth lens; 1161. a steering prism; 1162. a steering prism is glued; 1163. a transparent spacer; 1164. a second photosensitive element; 1170. a lighting element; 120. an image processing module; 130. a first display; 140. and a second display.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

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

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1 and 2, fig. 1 is a schematic diagram of an endoscopic imaging apparatus 10 in some embodiments, and fig. 2 is a schematic diagram of an objective lens module 1120 in some embodiments. The present application provides an endoscopic imaging device 10 comprising an endoscope 110, an image processing module 120, and a display. The endoscope 110 includes a tube 1110 and an objective lens module 1120 provided at an end of the tube 1110, the objective lens module 1120 including a lens body 1130 and an objective lens provided in the lens body 1130, the objective lens being capable of acquiring an image of a subject. The mirror 1130 and the tube 1110 may be integrally formed or detachably connected. The endoscope 110 can extend into the lumen of the body vessel and acquire an image of the object to be measured through the objective lens. The image processing module 120 is configured to process the image acquired by the endoscope 110, for example, perform noise reduction, defogging, and the like on the image to improve the definition of the image, and transmit the processed image to the display. The display is used to display an image of the endoscope 110, for example, the endoscope 110 is used to acquire an image of internal tissues of a human body and is displayed on the display so as to diagnose or treat the human body.

Further, referring to fig. 2 and 3, fig. 3 is a schematic diagram illustrating an internal structure of the objective lens module 1120 according to some embodiments. In some embodiments, the objective lens module 1120 includes a lens body 1130, and a first objective lens 1140 and two second objective lenses 1150 provided at ends of the lens body 1130. The first objective 1140 and the two second objective 1150 are used for acquiring an image of the object, wherein the first objective 1140 has a first light incident surface 1141, the second objective 1150 has a second light incident surface 1151, and the second light incident surfaces 1151 of the two second objective 1150 are respectively disposed on two sides of the first light incident surface 1141. The included angles between the two second light incident surfaces 1151 and the first light incident surface 1141 are equal, and are greater than or equal to 60 degrees and less than or equal to 90 degrees, in other words, the second light incident surface 1151 is perpendicular or inclined to the first light incident surface 1141.

The two second objective lenses 1150 can acquire images of the fields of view on both sides of the first objective lens 1140, which greatly improves the field of view of the objective lens 1120, and further can meet the requirement of large-scale image acquisition, for example, the endoscope 110 can acquire images of a larger range of human tissue through one screen, thereby facilitating diagnosis or treatment of human tissue. Meanwhile, the included angles between the two second light incident surfaces 1151 and the first light incident surface 1141 are equal, so that the field of view ranges obtained by the two second objective lenses 1150 are symmetrically distributed on both sides of the first objective lens 1140, which accords with the use habit of the user, and the field of view range of the objective lens module 1120 is improved, and the use experience of the user is improved at the same time, which is also beneficial to diagnosis or treatment.

In this application, the light incident surface may be a surface of the object lens closest to the object side, where the light transmitting element faces the object side. For example, in some embodiments, the first objective lens 1140 and the second objective lens 1150 are each provided with a protective glass 1152 closest to the object side for protecting the elements in the first objective lens 1140 and the second objective lens 1150, and then a surface of the protective glass 1152 of the first objective lens 1140 facing the object side may be understood as a first light incident surface 1141, and a surface of the protective glass 1152 of the second objective lens 1150 facing the object side may be understood as a second light incident surface 1151. Of course, the light incident surface can also be understood as a virtual plane of the objective lens at the light incident opening formed at the end of the lens body 1130, where the virtual plane is perpendicular to the principal ray incident by the objective lens, for example, in the embodiments shown in fig. 2 and 3, the dashed line with an arrow indicates the principal ray incident on the objective lens module 1120. Thus, the angle between the first light incident surface 1141 and the second light incident surface 1151 can be also understood as the angle between the principal ray incident on the first objective lens 1140 and the principal ray incident on the second objective lens 1150. In addition, in this application, the included angle between two surfaces, for example, the included angle between the first light incident surface 1141 and the second light incident surface 1151, is understood to be the included angle between the planes of the two surfaces, i.e. the extended surfaces of the two surfaces. In addition, in the present application, when two faces are inclined to each other, the included angles between the two faces all take acute angles.

In some embodiments, the field angle of the first objective lens 1140 is equal to the field angle of the second objective lens 1150, and is between 70 degrees-90 degrees, or between 120 degrees-140 degrees. The fields of view of the first objective lens 1140 and the second objective lens 1150 may or may not overlap, for example, when the angles of view of the first objective lens 1140 and the second objective lens 1150 are both between 70 degrees and 90 degrees, and the angle between the first light incident surface 1141 and the second light incident surface 1151 is smaller than 90 degrees, the fields of view of the first objective lens 1140 and the second objective lens 1150 overlap. When the angle of view of the first objective lens 1140 and the angle of view of the second objective lens 1150 are both between 120 degrees and 140 degrees, the angle of view of the first objective lens 1140 overlaps the angle of view of the second objective lens 1150. When the angles of view of the first objective lens 1140 and the second objective lens 1150 are between 70 degrees and 90 degrees, and the first light incident surface 1141 is perpendicular to the second light incident surface 1151, the angles of view of the first objective lens 1140 and the second objective lens 1150 do not overlap. The case where the angles of view of the other first objective lens 1140 and the second objective lens 1150 overlap or do not overlap may be deduced from the above examples, and will not be described here.

From the above example, it can be seen that the field angle of the objective lens module 1120 can be greater than 180 degrees due to the provision of three objective lenses. For example, when the angle of view of the first objective 1140 and the angle of view of the second objective 1150 are both 140 degrees, and the first light incident surface 1141 is perpendicular to the second light incident surface 1151, the angle of view of the objective module 1120 can reach 320 degrees, which is much larger than the angle of view of a single objective. Therefore, the arrangement of the three objective lenses of the objective lens module 1120 can greatly improve the field of view of the objective lens module 1120, which is beneficial to diagnosis or treatment of human body.

Further, in some embodiments, the first objective lens 1140 includes a first optical element 1142 and a first photosensitive element 1145 disposed on an image side of the first optical element 1142, and the second objective lens 1150 includes a second optical element 1153 and a second photosensitive element 1164 disposed on an image side of the second optical element 1153. In the present application, the objective system within the objective may comprise elements arranged in the objective that act to adjust the light, such as optical elements with optical power arranged within the objective, or steering elements that change the direction of the light path. In some embodiments, the two second photosensitive elements 1164 are inclined or perpendicular to the first photosensitive element 1145, and are located on a side of the first photosensitive element 1145 facing away from the first light incident surface 1141. In this way, the two second photosensitive elements 1164 are located on the side of the first photosensitive element 1145 facing away from the first light incident surface 1141, which facilitates positioning the second photosensitive elements 1164 within the radial range of the first objective lens 1140, so as to facilitate reducing the radial dimension of the objective lens module 1120, thereby making it easier for the endoscope 110 to enter the human body.

Further, in some embodiments, two second photosensitive elements 1164 are accommodated in the space of the first photosensitive element 1145 facing away from the first light incident surface 1141, and the positions of the two second photosensitive elements 1164 are corresponding to the radial dimension of the end portion of the lens body 1130, which is smaller than or equal to the radial dimension of the boundary of the first photosensitive element 1145 corresponding to the end portion of the lens body. In other words, the occupied space of the two second photosensitive elements 1164 in the radial direction of the lens body 1130 is smaller than or equal to the occupied space of the first photosensitive element 1145 in the radial direction of the lens body 1130, and the lens body 1130 does not need to have any additional reserved space in the radial direction to accommodate the second photosensitive elements 1164, so that the radial dimension of the objective lens module 1120 can be effectively compressed, and the radial dimension of the end portion of the lens body 1130 is compressed, which is beneficial for the endoscope 110 to adapt to more scenes with different space sizes.

Referring to fig. 3 and fig. 4 together, fig. 4 is a schematic diagram illustrating an internal structure of an objective lens module 1120 according to another embodiment. In some embodiments, the optical path of the second optical assembly 1153 may be deflected toward a side close to the optical axis of the first objective lens 1140 by a deflecting element such as a deflecting prism 1161, an optical waveguide 1154, or the like, so that the optical path of the second optical assembly 1153 can be imaged around a side of the first photosensitive element 1145 facing away from the first light entrance surface 1141.

Specifically, in the embodiment shown in fig. 3, the second optical component 1153 includes, from the object side to the image side along the optical axis, an optical waveguide 1154 and a second lens component 1155, where the optical waveguide 1154 is capable of deflecting the optical path, the second lens component 1155 has a function of adjusting light, and the second lens component 1155 includes at least one lens with refractive power. In some embodiments, the steering action of the optical waveguide 1154 on the optical path causes the optical axis of the second lens assembly 1155 to be perpendicular or oblique to the optical axis of the first optical assembly 1142, thereby causing the second photosensitive element 1164 to be perpendicular or oblique to the first photosensitive element 1145. It is appreciated that the optical waveguide 1154 may only function as a light path deflecting path in the second optical component 1153, such that the chief ray exiting the optical waveguide 1154 is deflected toward the optical axis near the first optical component 1142 relative to the chief ray incident on the second light incident surface 1151. And the second lens component 1155 is used for adjusting the light emitted from the optical waveguide 1154, so that the light can be better imaged on the photosensitive surface of the second photosensitive element 1164. The specific arrangement of the second lens assembly 1155 is not limited, and for example, the second lens assembly 1155 may include two, three, four or other number of lenses with refractive power, and the respective lenses of the second lens assembly 1155 cooperate with each other so that the light incident on the second objective lens 1150 can be clearly imaged on the second photosensitive element 1164.

The type of optical waveguide 1154 is also not limited, and in the embodiment shown in FIG. 3, optical waveguide 1154 is a geometric optical waveguide, also known as an array optical waveguide. Specifically, the optical waveguide 1154 outputs an image to the second lens assembly 1155 through the array mirror stack, enabling efficient maintenance of high quality of the image. Of course, in other embodiments, the optical waveguide 1154 may be a diffractive optical waveguide, which effectively deflects light by a diffraction effect, ensuring high quality of the image.

In other embodiments, as shown in fig. 4, the turning element of the second optical component 1153 may also be a turning prism 1161, where the turning prism 1161 is disposed on the image side of the second lens component 1155, and the light beam is deflected by the turning prism 1161 to the second photosensitive element 1164 for imaging after being adjusted by the second lens component 1155. It is understood that the light incident direction of the turning prism 1161 is inclined or perpendicular to the light emergent direction of the turning prism 1161, for example, in the embodiment shown in fig. 4, the turning prism 1161 is a regular prism, and the turning prism 1161 is capable of deflecting the light path by 90 degrees.

Note that, in the embodiment shown in fig. 4, the relationship between the optical axis of the second lens assembly 1155 and the optical axes of the second light incident surface 1151 and the first optical assembly 1142 is not limited. When the optical axis of the second lens assembly 1155 is perpendicular to the second light incident surface 1151, the light path does not need to be deflected when the light enters from the second light incident surface 1151 and reaches the turning prism 1161 through the second lens assembly 1155. Referring to fig. 4, in some embodiments, the optical axis of the second lens assembly 1155 is inclined to the second light incident surface 1151 and parallel to the optical axis of the first optical assembly 1142. In this way, the first optical component 1142 and the second lens component 1155 can be parallel to the axial direction of the assembly space of the objective lens module 1120, which is beneficial to the assembly of the first objective lens 1140 and the second objective lens 1150.

In the present embodiment, since the optical axis of the second lens assembly 1155 is inclined to the second light incident surface 1151, i.e. inclined to the principal ray incident on the second light incident surface 1151, the second optical assembly 1153 further needs to configure a turning element to deflect the principal ray incident on the second light incident surface 1151 so that the principal ray is parallel to the optical axis of the second lens assembly 1155, so that the second lens assembly 1155 can effectively adjust the light, and the quality of the image acquired by the second objective lens 1150 is ensured. Specifically, in some embodiments, the second optical component 1153 further includes a three-glue turning prism 1162, where the three-glue turning prism 1162 is formed by three prisms glued in pairs, and a reflecting surface (not shown) capable of deflecting the light path is formed between every two adjacent prisms. The two reflective surfaces of the triple bond turning prism 1162 are capable of deflecting the optical path twice such that the chief ray incident on the second light incident surface 1151 is parallel to the optical axis of the second lens assembly 1155.

A triple glue turning prism 1162 may be disposed on the object side of the second lens assembly 1155 to deflect light into the second lens assembly 1155. Whereas in the embodiment shown in fig. 4, a triple bond turning prism 1162 is disposed within the second lens assembly 1155, in particular, the second lens assembly 1155 includes a first lens 1156 and a second lens 1157 disposed at intervals along the optical axis from the object side to the image side, and the triple bond turning prism 1162 is disposed between the first lens 1156 and the second lens 1157. A triple cemented turning prism 1162 is disposed between two of the lenses of the second lens assembly 1155, and light rays are also in the optical path of the second lens assembly 1155 while being deflected within the triple cemented turning prism 1162. In other words, the introduction of the triple glue turning prism 1162 does not increase the size of the second optical assembly 1153 in the axial direction, thereby facilitating the compression of the size of the objective lens module 1120 in the axial direction, enabling the endoscope 110 to accommodate more different scenes. Of course, when the triple-glue turning prism 1162 is disposed between the first lens 1156 and the second lens 1157, the main optical axis of the first lens 1156 may be perpendicular to the second light incident surface 1151, so that the first lens 1156 can effectively adjust light. At this time, the second lens 1157 is disposed coaxially with the lens on the image side of the second lens 1157, and the main optical axis of the second lens 1157 is inclined to the main optical axis of the first lens 1156. Thus, in the present embodiment, the optical axis of the second lens element 1155 is parallel to the optical axis of the first optical element 1142, which can be understood that the main optical axes of the second lens element 1157 and the respective lenses on the image side of the second lens element 1157 are parallel to the optical axis of the first optical element 1142.

It should be noted that in the embodiments shown in fig. 3 and 4, the optical waveguide 1154, the triple bond turning prism 1162, and the turning prism 1161 are only illustrative of some embodiments of the turning elements, and in other embodiments, the location and type of the turning elements may be other arrangements. For example, the triple-glue turning prism 1162 may be disposed between the other two lenses, or the light path may be deflected by another type of turning element such as a pentaprism, so long as the cooperation of the one or more turning elements can enable the light incident on the second light incident surface 1151 to be effectively adjusted by the second lens assembly 1155 and finally imaged on the second photosensitive element 1164. In the embodiment shown in fig. 3 and 4, the light is deflected by one or more deflecting elements and then incident on the second photosensitive element 1164 in a direction perpendicular to the optical axis of the first optical component 1142.

It should be noted that, in the embodiment shown in fig. 3 and fig. 4, the turning element deflects the optical path of the second optical element 1153 toward the direction approaching the first optical element 1142, so that the second photosensitive element 1164 can be disposed in the space of the first photosensitive element 1145 facing away from the first light incident surface 1141, thereby compressing the radial dimension of the objective lens module 1120. In other embodiments, the turning element may also deflect the optical path of the second optical assembly 1153 away from the first optical assembly 1142, e.g., the optical waveguide 1154 deflects the optical path in a direction opposite to that of the embodiment shown in fig. 3, such that the second photosensitive element 1164 is radially outward of the first objective lens 1140.

In addition, in the embodiment shown in fig. 3 and 4, the components of the two second objective lenses 1150 are the same, and the two second objective lenses 1150 are symmetrically disposed on both sides of the optical axis of the first objective lens 1140, which is beneficial to simplifying the setting and assembling process of the objective lens module 1120. In other embodiments, the two second objective lenses 1150 may also be disposed asymmetrically, or the components of the two second objective lenses 1150 may not be identical. For example, one of the second objective lenses 1150 employs the optical waveguide 1154 as a steering element, and the other second objective lens 1150 employs the steering prism 1161 as a steering element, as long as the two second objective lenses 1150 can acquire field-of-view images on both sides of the first objective lens 1140 through the two second light incident surfaces 1151, respectively.

It will be appreciated that the arrangement of the steering element in the second optical assembly 1153 to deflect the light path also enables a periscope-like effect, thereby compressing the axial dimension of the second objective lens 1150, which is beneficial for the endoscope 110 to accommodate more applications. In addition, in the embodiment shown in fig. 3 and fig. 4, the first optical element 1142 includes a first lens element 1143 having at least one lens with refractive power, and the first optical element 1142 is not provided with a turning element, and the principal ray incident on the first light incident surface 1141 is incident on the first photosensitive element 1145 in a direction perpendicular to the first light incident surface 1141 after being adjusted by the first lens element 1143. Of course, the first optical component 1142 may also be provided with a steering element to achieve the effect of compressing the axial dimension of the first objective lens 1140, thereby further compressing the axial dimension of the objective lens module 1120.

Specifically, referring to fig. 5, fig. 5 is a schematic diagram showing an internal structure of the first objective lens 1140 in still other embodiments. In some embodiments, the first optical component 1142 includes at least one first turning element 1144, where the first turning element 1144 is configured to deflect the light path, so that the first photosensitive element 1145 is inclined or perpendicular to the first light incident surface 1141. In the embodiment shown in fig. 5, the first turning element 1144 is a triangular prism, and is capable of deflecting the optical path by 90 degrees, so that the first photosensitive element 1145 is perpendicular to the first light incident surface 1141, thereby effectively compressing the axial dimension of the first objective lens 1140. Of course, the number and type of first steering elements 1144 are not limited, and may be specifically deduced from the above description. The structure of the second objective lens 1150 is also omitted in fig. 5, and the arrangement of the second objective lens 1150 in fig. 5 may be the same as in the embodiment shown in fig. 3 and 4, and will not be repeated here. It should be noted that, in the present embodiment, due to the deflection of the first turning element 1144, the optical axis of the first optical component 1142 changes in the direction of the first turning element 1144, and in this application, the optical axis of the first optical component 1142 is described and all the optical axes of the first optical component 1142 at the first lens component 1143 can be understood.

Referring back to fig. 3, in some embodiments, the second lens assembly 1155 includes, along the optical axis from the object side to the image side, a second front lens group with negative refractive power and a second rear lens group with positive refractive power. The second front lens assembly with negative refractive power and the second rear lens assembly with positive refractive power can make the second lens assembly 1155 form a retrofocus structure, so that the second objective lens 1150 has a wide-angle photographing effect, which is beneficial to further improving the field of view of the objective lens module 1120. Of course, the number and types of lenses in the second front lens group and the second rear lens group are not limited, for example, in the embodiment shown in fig. 4, the first lens 1156 with negative refractive power and the second lens 1157 with positive refractive power constitute the second front lens group, the third lens 1158 with positive refractive power and the fourth lens 1159 with negative refractive power constitute the second rear lens group, or the first lens 1156 constitutes the second front lens group, and the second lens 1157, the third lens 1158 and the fourth lens 1159 constitute the second rear lens group. Of course, the first objective lens 1140 may also have a telephoto structure, for example, the first objective lens 1140 includes a first front lens group and a first rear lens group with negative refractive power from an object side to an image side along an optical axis, and specific arrangements of the first front lens group and the second rear lens group may refer to the second objective lens 1150, which will not be described herein.

It should be noted that the above description is only a schematic illustration of a part of the structure of the objective lens module 1120, and in other embodiments, the objective lens module 1120 may also have other elements. For example, second optical assembly 1153 may also include a transparent spacer 1163 between cover glass 1152 and first lens 1156, and between first lens 1156 and triple bond turning prism 1162. Referring to fig. 2 again, in some embodiments, the objective lens module 1120 further includes a plurality of illumination elements 1170, for example, the illumination elements 1170 are disposed on two sides of the first light incident surface 1141 and the second light incident surface 1151, respectively, so as to illuminate the human tissue, so that the first objective lens 1140 and the second objective lens 1150 collect clear images of the human tissue.

Referring to fig. 1, the endoscope 110 provided in the present application is not limited in type and may be a hard tube endoscope or a flexible tube endoscope. In the embodiment shown in fig. 1, where the endoscope 110 is a hard tube endoscope, the tube 1110 of the endoscope 110 is a hard material, the endoscope 110 is typically used for diagnosis or treatment of superficial and superficial regions of the human body, and in particular, the endoscope 110 includes, but is not limited to, laparoscopes, thoracoscopes, arthroscopes, discoscopes, ventriculoscopes, and the like. In other embodiments, the endoscope 110 is a flexible tube endoscope that can be used to access small or curved spaces to accommodate different applications, such as accessing the body through the digestive, respiratory and urinary tracts of the body. In particular, the endoscope 110 includes, but is not limited to, a gastroscope, enteroscope, laryngoscope, bronchoscope, or the like.

In some embodiments, the endoscopic imaging apparatus 10 provided in the present application may further include a first display 130 and two second displays 140, where the first display 130 is used for displaying the image acquired by the first objective lens 1140, and the two second displays 140 are respectively corresponding to the two second objective lenses 1150 one by one, and each second display 140 is used for displaying the image acquired by the corresponding one of the second objective lenses 1150. Further, the two second displays 140 are respectively disposed at two sides of the first display 130 and are inclined to the first display 130, so as to adapt to the relative positional relationship between the second objective 1150 and the first objective 1140, so that the user can clearly obtain images within the field of view of the three objective lenses, which is beneficial to diagnosis and treatment. In some embodiments, the two second displays 140 may be symmetrically distributed on both sides of the first display 130, according to the habit of the user, so that the user can more easily link the images acquired by the three objective lenses. Of course, in other embodiments, the images of the three objective lenses may be integrated on one display, for example, the images of the first objective lens 1140 and the two second objective lenses 1150 are respectively displayed in different areas on one display, so as to reduce the space occupied by the endoscopic imaging apparatus 10.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (13)

1. An objective lens module, comprising:

a mirror body;

the first objective lens is arranged at the end part of the lens body and provided with a first light incident surface; and

the two second objective lenses are arranged at the end parts of the objective body and are provided with second light incident surfaces, the two second light incident surfaces are respectively arranged at the two sides of the first light incident surface, and the included angles between the two second light incident surfaces and the first light incident surface are equal and are all between 60 degrees and 90 degrees.

2. The objective lens module according to claim 1, wherein the first objective lens includes a first optical component and a first photosensitive element disposed on an image side of the first optical component, and the second objective lens includes a second optical component and a second photosensitive element disposed on an image side of the second optical component;

the two second photosensitive elements are inclined or perpendicular to the first photosensitive element and are positioned on one side of the first photosensitive element, which is away from the first light incident surface.

3. The objective lens module according to claim 2, wherein the positions of the two second photosensitive elements are within a radial range corresponding to the first objective lens.

4. The objective lens module of claim 2, wherein the second optical assembly includes at least one turning element to deflect an optical path of the second optical assembly toward a side proximate the first objective lens.

5. The objective lens module as recited in claim 4, wherein the second optical element includes an optical waveguide and a lens element along an optical axis from an object side to an image side, the lens element including at least one lens with refractive power, the optical axis of the lens element being perpendicular or oblique to the optical axis of the first optical element.

6. The objective lens module according to claim 4, wherein the second optical assembly comprises a lens assembly and a turning prism from an object side to an image side along an optical axis, and an incident direction of the turning prism is inclined or perpendicular to an emergent direction of the turning prism.

7. The objective lens module of claim 6, wherein the lens assembly comprises a first lens and a second lens spaced apart, the second optical assembly further comprises a three-glue turning prism disposed between the first lens and the second lens, and the three-glue turning prism comprises two reflective surfaces for deflecting light.

8. The objective lens module according to any one of claims 1-7, wherein the first objective lens comprises a first turning element and a first photosensitive element along an optical axis from an object side to an image side, the first turning element being configured to deflect an optical path such that the first photosensitive element is inclined or perpendicular to the first light incident surface.

9. The objective lens module as recited in any one of claims 1-7, wherein the first objective lens includes a first front lens group with negative refractive power and a first rear lens group with positive refractive power from an object side to an image side along an optical axis; and/or the number of the groups of groups,

the second objective lens includes a second front lens group having negative refractive power and a second rear lens group having positive refractive power from an object side to an image side along an optical axis.

10. The objective lens module according to claim 9, wherein two second objective lenses are symmetrically disposed on both sides of the optical axis of the first objective lens.

11. An endoscope comprising a tube and an objective lens module according to any one of claims 1-10, said lens being connected to said tube.

12. An endoscopic imaging apparatus comprising a display for displaying an image acquired by the objective lens module, and the endoscope according to claim 11.

13. The endoscopic imaging device of claim 12, comprising a first display for displaying an image acquired by the first objective lens and two second displays, each for displaying an image acquired by a corresponding one of the second objective lenses, the two second displays being disposed on either side of the first display, respectively, and both being inclined to the first display.

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