WO-2026090789-A1 - ENDOSCOPE

WO2026090789A1WO 2026090789 A1WO2026090789 A1WO 2026090789A1WO-2026090789-A1

Abstract

An endoscope (100), which belongs to the technical field of imaging devices. The endoscope comprises: an imaging device (10) for transmitting an image; a first image sensor (20) arranged on an image side of the imaging device (10), the first image sensor (20) being used for receiving light transmitted by the imaging device (10) and collecting the image; and a magnifying device (30), which comprises a photoelectric conversion device (31), an image display (32), a second image sensor (34), and a magnifying lens group (33), wherein the photoelectric conversion device (31) is used for converting the image collected by the first image sensor (20) into an electrical signal and transmitting same to the image display (32), the image display (32) is used for displaying the image, the image display (32) is arranged on an object side of the magnifying lens group (33), the second image sensor (34) is arranged on an image side of the magnifying lens group (33), and the magnifying lens group (33) is used for magnifying the image displayed by the image display (32) and projecting the magnified image onto the second image sensor (34). Therefore, the technical problem of image clarity degradation caused by using a software interpolation algorithm processing means to increase the pixel count of an acquired image can be solved.

Inventors

LANG, Huanbiao

Assignees

致虹医疗科技(深圳)有限公司

Dates

Publication Date: 20260507
Application Date: 20241028

Claims (17)

An endoscope, characterized in that it comprises: Imaging device, used to transmit images; A first image sensor is disposed on the image side of the imaging device. The first image sensor is used to receive light transmitted by the imaging device and acquire images. A magnifying device is provided, comprising a photoelectric conversion device, an image display, a second image sensor, and a magnifying lens group. The photoelectric conversion device is electrically connected to the first image sensor and the image display. The photoelectric conversion device converts the image acquired by the first image sensor into an electrical signal and transmits it to the image display. The image display receives the electrical signal transmitted by the photoelectric conversion device and displays the image. The image display is located on the object side of the magnifying lens group, and the second image sensor is located on the image side of the magnifying lens group. The magnifying lens group magnifies the image displayed on the image display and projects the magnified image onto the second image sensor.
The endoscope as claimed in claim 1, wherein the magnifying lens group comprises a dual telecentric lens.
The endoscope as described in claim 2, wherein the magnifying lens group comprises a first concave-convex lens, a first cemented doublet lens, a first aperture, a second cemented doublet lens, a third cemented doublet lens, a second concave-convex lens, a third concave-convex lens, a fourth concave-convex lens, and a fifth concave-convex lens arranged sequentially from the image display to the second image sensor. The first concave-convex lens is used to converge the light transmitted from the image display and transmit the light to the first cemented doublet lens. The first cemented doublet lens is used to converge the light transmitted from the first concave-convex lens and transmit the light to the second cemented doublet lens. The second cemented doublet lens is used to converge the light transmitted from the first cemented doublet lens and transmit the light to the third cemented doublet lens. The third cemented doublet lens is used to converge the light transmitted from the second cemented doublet lens and transmit the light to the second concave-convex lens. The second concave-convex lens is used to diverge the light transmitted from the third cemented doublet lens and transmit the light to the third concave-convex lens. The third concave-convex lens is used to diverge the light transmitted from the second concave-convex lens and transmit the light to the fourth concave-convex lens. The fourth concave-convex lens is used to converge the light transmitted from the third concave-convex lens and transmit the light to the fifth concave-convex lens. The fifth concave-convex lens is used to converge the light transmitted from the fourth concave-convex lens and form parallel light. The second image sensor is used to receive the parallel light emitted from the fifth concave-convex lens.
The endoscope as claimed in claim 1, characterized in that the imaging device comprises a disposable image transmission light guide device and an imaging lens group, the disposable image transmission light guide device comprising a front-end image acquisition device and a light guide; the front-end image acquisition device is disposed on the image acquisition side of the light guide; the light guide is disposed between the front-end image acquisition device and the imaging lens group; the first image sensor is disposed on the image side of the imaging lens group; The front-end imaging device is used to receive the light reflected from the object to be observed and transmit the light to the light guide; the light guide is used to receive the light transmitted by the front-end imaging device and transmit the light to the imaging lens group; the imaging lens group is used to receive the light transmitted by the light guide and transmit the light to the first image sensor.
The endoscope as described in claim 4, characterized in that the front imaging device includes a first light-incoming surface, a first reflective surface, and a first light-outgoing surface; the first light-incoming surface and the first reflective surface are arranged along a first direction, the first direction being perpendicular to the optical axis of the light guide, the first light-incoming surface being used to transmit light reflected by the object to be observed; the first reflective surface is arranged at an angle to the first light-incoming surface and the first light-outgoing surface, the first reflective surface being used to reflect the light transmitted by the first light-incoming surface and reflect the light towards the light guide; the first light-outgoing surface and the first reflective surface are arranged along the optical axis of the light guide, the first light-outgoing surface being used to transmit light reflected by the first reflective surface; Alternatively, the front-end imaging device extends along the optical axis of the light guide, and the front-end imaging device has a second light-inlet surface and a second light-outlet surface, which are respectively located at both ends of the front-end imaging device along the optical axis of the light guide.
The endoscope as described in claim 5 is characterized in that the first light-incoming surface is an arc surface or a plane, the first reflecting surface is an arc surface or a plane, and the first light-outcoming surface is an arc surface or a plane.
The endoscope as described in claim 4 is characterized in that an optical adhesive is provided between the front imaging device and the light guide, and the thickness of the optical adhesive is in the range of 5 μm to 10 μm. Alternatively, the front-end imaging device and the light guide are an integral structure.
The endoscope as described in claim 4, wherein the imaging lens group comprises a first convex lens, a first concave lens, a second concave lens, and a second convex lens arranged sequentially from the object side to the image side along its optical axis. The first convex lens is used to converge the light transmitted by the light guide and transmit the light to the first concave lens. The first concave lens is used to diverge the light transmitted by the first convex lens and transmit the light to the second concave lens. The second concave lens is used to diverge the light transmitted by the first concave lens and transmit the light to the second convex lens. The second convex lens is used to converge the light transmitted by the second concave lens and form parallel light. The first image sensor is used to receive the parallel light emitted from the second convex lens.
The endoscope as claimed in claim 8, wherein the imaging lens group includes at least one aspherical surface; the refractive index of the first convex lens and the second convex lens is in the range of 1.49-1.65; and the refractive index of the first concave lens and the second concave lens is in the range of 1.55-1.95.
The endoscope as described in claim 8, wherein the imaging lens group further comprises a protective lens and an infrared filter, the protective lens being disposed on the side of the first convex lens away from the first concave lens; and the infrared filter being disposed between the second convex lens and the first image sensor.
The endoscope as described in claim 4 is characterized in that the extending direction of the light guide is consistent with the arrangement direction of the light guide and the front imaging device, and the light guide is used to transmit the main light ray with an angle α with its optical axis, where α is greater than or equal to -0.5° and less than or equal to 0.5°.
The endoscope as described in claim 4, wherein the optical axis of the imaging lens group coincides with the optical axis of the light guide; Alternatively, the optical axis of the imaging lens group is set at an angle to the optical axis of the light guide, and a deflecting prism is provided between the imaging lens group and the light guide. The deflecting prism has a second reflecting surface, which is set at an angle to the optical axis of the light guide and the optical axis of the imaging lens group. The deflecting prism is used to reflect the light transmitted by the light guide towards the imaging lens group.
The endoscope as described in claim 4 is characterized in that the disposable image transmission and light guiding device includes an auxiliary light source, the auxiliary light source being disposed on the side of the front imaging device close to the object to be observed, and the auxiliary light source being used to provide illumination.
The endoscope as described in any one of claims 4-13 is characterized in that the endoscope includes an illumination assembly, the illumination assembly including a main light source and a beam splitter; the main light source is disposed on one side of the beam splitter along the optical axis perpendicular to the light guide, the main light source being used to emit light towards the beam splitter; the beam splitter is disposed along the optical axis of the light guide on the side of the imaging lens group and the light guide away from the front-end imaging device, the beam splitter being used to reflect the light emitted by the main light source towards the light guide, and the beam splitter being also used to transmit the light emitted by the light guide towards the beam splitter.
The endoscope as described in any one of claims 4-13 is characterized in that the disposable image transmission light guide device further includes a housing extending along the length direction of the light guide member, the light guide member and the front-end image acquisition device are disposed within the housing member, and the disposable image transmission light guide device is detachably connected to the imaging lens group. The light guide component and the outer casing component are connected by double-material injection molding; Alternatively, the light guide component may be interference-fitted with the housing component.
The endoscope as described in any one of claims 1-13 is characterized in that the endoscope includes two magnifying devices, which are a first magnifying device and a second magnifying device, respectively. The photoelectric conversion device in the first amplification device is electrically connected to the first image sensor; The photoelectric conversion device in the second amplification device is electrically connected to the second image sensor in the first amplification device.
The endoscope as claimed in claim 16, wherein the endoscope comprises at least three of the aforementioned magnifying devices.

Description

An endoscope Technical Field This application relates to the field of imaging device technology, specifically to an endoscope. Background Technology Endoscopes are widely used in medical analysis, industrial inspection, precision design, and energy exploration. Endoscopes acquire images within a specific space, then magnify them before displaying them on a terminal display device. Currently, this is mainly achieved by using software interpolation algorithms to enlarge the image pixels, but this method leads to a decrease in image clarity. Technical issues The purpose of this application is to provide an endoscope that solves the technical problem in the prior art where the use of software interpolation algorithms to enlarge the pixels of the image acquired by the endoscope leads to a decrease in image clarity. Technical solutions To achieve the above objectives, embodiments of this application provide an endoscope, comprising: an imaging device for transmitting images; a first image sensor disposed on the image side of the imaging device, the first image sensor being used to receive light transmitted by the imaging device and acquire images; and a magnification device, the magnification device including a photoelectric conversion device, an image display, a second image sensor, and a magnifying lens group; the photoelectric conversion device being electrically connected to the first image sensor and the image display, the photoelectric conversion device being used to convert the image acquired by the first image sensor into an electrical signal and transmit it to the image display, the image display being used to receive the electrical signal transmitted by the photoelectric conversion device and display the image; the image display being disposed on the object side of the magnifying lens group, the second image sensor being disposed on the image side of the magnifying lens group, the magnifying lens group being used to magnify the image displayed on the image display and project the magnified image onto the second image sensor. In some embodiments, the magnifying lens group includes a bi-telecentric lens. In some embodiments, the magnifying lens group includes a first concave-convex lens, a first cemented doublet lens, a first aperture stop, a second cemented doublet lens, a third cemented doublet lens, a second concave-convex lens, a third concave-convex lens, a fourth concave-convex lens, and a fifth concave-convex lens arranged sequentially from the image display to the second image sensor; the first concave-convex lens is used to converge the light transmitted from the image display and transmit the light to the first cemented doublet lens; the first cemented doublet lens is used to converge the light transmitted from the first concave-convex lens and transmit the light to the second cemented doublet lens; the second cemented doublet lens is used to converge the light transmitted from the first cemented doublet lens and transmit the light to the second image sensor. The third cemented doublet lens is used to converge the light transmitted from the second cemented doublet lens and transmit the light to the second concave-convex lens. The second concave-convex lens is used to diverge the light transmitted from the third cemented doublet lens and transmit the light to the third concave-convex lens. The third concave-convex lens is used to diverge the light transmitted from the second concave-convex lens and transmit the light to the fourth concave-convex lens. The fourth concave-convex lens is used to converge the light transmitted from the third concave-convex lens and transmit the light to the fifth concave-convex lens. The fifth concave-convex lens is used to converge the light transmitted from the fourth concave-convex lens and form parallel light. The second image sensor is used to receive the parallel light emitted from the fifth concave-convex lens. In some embodiments, the imaging apparatus includes a disposable image transmission light guide device and an imaging lens group. The disposable image transmission light guide device includes a front-end image capturing device and a light guide. The front-end image capturing device is disposed on the image capturing side of the light guide. The light guide is disposed between the front-end image capturing device and the imaging lens group. A first image sensor is disposed on the image side of the imaging lens group. The front-end image capturing device is used to receive light reflected from the object to be observed and transmit the light to the light guide. The light guide is used to receive the light transmitted by the front-end image capturing device and transmit the light to the imaging lens group. The imaging lens group is used to receive the light transmitted by the light guide and transmit the light to the first image sensor. In some embodiments, the front-end imaging device includes a first light-inlet surface, a first reflective surface, and a