CN109965830B

CN109965830B - Endoscope camera device

Info

Publication number: CN109965830B
Application number: CN201910327201.5A
Authority: CN
Inventors: 迟崇巍; 田捷
Original assignee: Beijing Digital Precision Medicine Co
Current assignee: Beijing Digital Precision Medicine Co
Priority date: 2019-04-23
Filing date: 2019-04-23
Publication date: 2024-05-07
Anticipated expiration: 2039-04-23
Also published as: CN109965830A

Abstract

The present specification provides an endoscopic imaging device. The device comprises an active light source, a light guide optical fiber and an endoscope, wherein the endoscope comprises an endoscope optical system and a wide spectrum detector, and the wide spectrum detector is arranged at an output end of optical path transmission of the endoscope optical system; the active light source is used for generating illumination light beams with the spectral width of 400-820 nm, the active light source is connected with the light guide optical fiber, the illumination light beams generated by the active light source are transmitted through the light guide optical fiber and then irradiate the object space of the endoscope optical system, and the light reflected by the object space is received by the wide spectrum detector after passing through the endoscope optical system; the broad spectrum detector is used for performing image processing on the received optical information. The device provided by each embodiment of the specification has the advantages of simple structure, small volume, simple and convenient operation, long service life and the like.

Description

Endoscope camera device

Technical Field

The invention relates to the technical field of medical equipment, in particular to an endoscope camera device.

Background

An endoscope is a medical examination instrument by which a doctor can observe an ulcer or a tumor in a patient, thereby making an optimal treatment plan. The endoscopic camera device is a part of an endoscope, is responsible for an image acquisition function, and generally comprises an image sensor, an optical lens, light source illumination, a mechanical structure and the like. Most of the conventional endoscopic camera devices are imaging in a natural spectral range, and in recent years, wide-spectrum (near infrared) imaging based on ICG fluorescence development is beginning to be applied to the endoscope industry. However, the existing endoscope wide-spectrum imaging mostly adopts a structure of a multi-light path and multi-video sensor to respectively realize the imaging of white light and fluorescent parts, so that the existing imaging device has the problems of larger volume, frequent switching of an internal imaging unit, inconvenient operation and the like.

Disclosure of Invention

The present invention provides an endoscope imaging device capable of improving the simplicity of device operation.

The endoscope image pickup device provided in the present specification is realized by including:

An endoscopic camera device, the device comprises an active light source, a light guide optical fiber and an endoscope, wherein the endoscope comprises an endoscope optical system and a broad spectrum detector, and the broad spectrum detector is arranged at an output end of optical path propagation of the endoscope optical system;

The active light source is used for generating illumination light beams with the spectral width of 400-820 nm, the active light source is connected with the light guide optical fiber, the illumination light beams generated by the active light source are transmitted through the light guide optical fiber and then irradiate the object space of the endoscope optical system, and the light reflected by the object space is received by the wide spectrum detector after passing through the endoscope optical system;

the broad spectrum detector is used for performing image processing on the received optical information.

In another embodiment of the device provided in the present specification, the active light source includes a white LED light source and a mid-infrared laser light source.

In another embodiment of the device provided in the present disclosure, the led light source and the mid-infrared laser light source of the active light source are coupled into the light guide fiber through a focusing lens after passing through a dichroic mirror, respectively.

In another embodiment of the device provided herein, the device further comprises a broad spectrum adapter mirror disposed between the endoscope optical system and the broad spectrum detector for adjusting focal length and object distance.

In another embodiment of the device provided in the present specification, an optical filter is further disposed between the broad spectrum adaptive mirror and the broad spectrum detector, and an optical film with high reflection to 400 nm-650 nm and 820 nm-1000 nm and high reflection to 700 nm-820 nm is plated on the optical filter.

According to the endoscope camera device provided by the specification, the single wide-spectrum detector chip is adopted to process visible light and near infrared light simultaneously, so that the problem that the traditional endoscope camera device is frequently switched between two detectors is avoided, and the convenience of actual operation can be improved. And correspondingly, a complex multi-light path coefficient does not need to be designed, so that the complexity of the structure can be further reduced. The device provided by each embodiment of the specification has the advantages of simple structure, small volume, simple and convenient operation, long service life and the like.

Drawings

In order to more clearly illustrate the embodiments of the present description or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some of the embodiments described in the present description, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a broad spectrum endoscopic camera apparatus according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of a broad spectrum endoscope in another embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a broad spectrum detector in another embodiment of the present disclosure;

FIG. 4 is a schematic structural view of a broad spectrum adapter mirror in another embodiment of the present disclosure;

the device comprises a 100-object space, a 101-broad spectrum endoscope, a 102-interface, a 103-adaptive mirror, a 104-detector, a 105-optical filter, a 200-light source and a 201-light guide fiber.

Detailed Description

In order to make the technical solutions in the present specification better understood by those skilled in the art, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is obvious that the described embodiments are only some embodiments of the present specification, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are intended to be within the scope of the present disclosure.

An endoscope is a medical examination instrument by which a doctor can observe an ulcer or a tumor in a patient, thereby making an optimal treatment plan. The endoscopic camera device is a part of an endoscope, is responsible for an image acquisition function, and generally comprises an image sensor, an optical lens, light source illumination, a mechanical structure and the like. Most of the conventional endoscopic camera devices are imaging in a natural spectral range, and in recent years, wide-spectrum (near infrared) imaging based on ICG fluorescence development is beginning to be applied to the endoscope industry. However, the existing endoscope wide-spectrum imaging mostly adopts a structure of a multi-light path and multi-video sensor so as to respectively realize the imaging of white light and fluorescent parts. Therefore, the existing image pickup device has the problems of large volume, frequent switching of an internal imaging unit, inconvenient operation and the like.

Accordingly, the present specification provides an endoscopic imaging device that may include an active light source, a light guide fiber, and an endoscope including an endoscope optical system and a broad spectrum detector that may be disposed at an output end of an optical path propagation of the endoscope optical system;

The active light source can be used for generating illumination light beams with the spectral width of 400-820 nm, the active light source is connected with the light guide optical fiber, the illumination light beams generated by the active light source can irradiate the object space of the endoscope optical system after being transmitted through the light guide optical fiber, and the light reflected by the object space is received by the broad spectrum detector after passing through the endoscope optical system.

The broad spectrum detector may be used to image process the received light information.

Fig. 1 is a schematic structural diagram of an endoscopic image pickup device according to an embodiment of the present disclosure, and as shown in fig. 1, the endoscopic image pickup device provided in the present disclosure may include a broad spectrum light source as an active light source 200, where the active light source 200 may generate an illumination beam having a spectral width of 400nm to 820 nm. Wherein 650nm to 820nm is Near Infrared spectrum, and Near Infrared (NIR) light of 650nm to 820nm is called as "tissue light window (Tissue Optical Window)", and has the following advantages compared with visible light: the biological tissue has minimal absorption and scattering effects on near infrared light in the wave band, and can penetrate deeper tissues; the biological tissue has smaller autofluorescence of near infrared light in this band, relatively higher Signal-to-background ratio (SBR), and so on.

As shown in fig. 1, the endoscopic image pickup device may further include an endoscope and a light guide fiber 201. FIG. 2 shows a schematic view of a broad spectrum endoscope in one embodiment of the present disclosure. The endoscope may include an endoscope optical system 101 and a broad spectrum detector 104. The light guide fiber 201 may be divided into an external portion and an internal portion of the endoscope, and the two portions may be an integral structure or a two-stage structure. If the structure is a two-section structure, the inner section and the outer section can be connected by an optical fiber connector. As shown in fig. 1, the inner and outer optical fibers are connected by an endoscope interface 102, and the endoscope interface 102 needs to be completely closed after the optical fibers pass through, so as to prevent external light from interfering with an endoscope imaging system.

The active light source 200 is connected to a light guide fiber port located outside the endoscope. The illumination light generated by the active light source 200 may be coupled into the light guide fiber 201, transmitted through the light guide fiber 201, and then led out from the output end of the light guide fiber 201, and irradiated to the object space of the endoscope optical system 101, so as to be used as an active illumination light source for imaging the object space by the endoscope optical system. After the ICG material on the object side is irradiated, 820nm-900nm fluorescence can be generated, and the fluorescence generated on the object side passes through the endoscope optical system 101 and is received by the broad spectrum detector 104. Accordingly, the broad spectrum detector 104 may perform image processing on the received light information.

Fig. 3 shows a schematic diagram of the structure of a broad spectrum detector in one embodiment of the present disclosure. The broad spectrum detector 104 may convert the received optical signal into an electrical signal, thereby converting the image information characterized by the optical signal into the image information characterized by the electrical signal. The electrical signal may be transmitted to a display connected to the endoscopic imaging device, and the display may display an image of the object space by the endoscopic imaging device.

The broad spectrum detector 104 may employ a broad spectrum detector chip that is compatible with both visible and near infrared spectrum optical signals, and has a quantum efficiency near 50% in the near infrared spectrum. The imaging of a broad spectrum of 400 nm-900 nm by using one broad spectrum detector chip is realized, and the problem that the existing endoscope camera device needs to be frequently switched among a plurality of image sensors is avoided.

By utilizing the scheme provided by the embodiment of the specification, the spectrum width is further increased on the basis of the traditional white light endoscope imaging device, and the spectrum width is expanded from 400nm to 700nm to 400nm to 900nm. And the single wide spectrum detector is adopted to simultaneously image white light and near infrared light, so that the problem of frequent switching among multiple image sensors is avoided, and the efficiency and the simplicity of actual operation are improved.

In one embodiment of the present disclosure, the active light source 200 may include a white LED light source and a near infrared laser light source. The near infrared laser source can be a laser source with any wavelength range between 700nm and 820 nm. The wide-spectrum active illumination light source obtained by adopting the method of combining the LED and the laser has the advantages of high luminous efficiency, low power consumption, small volume and the like, thereby greatly reducing the volume and the heat generation quantity of the endoscope camera device and prolonging the service life of the endoscope camera device.

Further, in one embodiment of the present disclosure, the LED light source and the laser light source of the active light source 200 may be coupled into the light guide fiber through the focusing lens after passing through the dichroic mirror, so as to simply and conveniently realize the effective fusion of the light beams generated by the LED light source and the laser light source.

Fig. 4 shows a schematic structural diagram of a broad spectrum adapter mirror in one embodiment of the present specification. In another embodiment of the present disclosure, the endoscopic image capturing device may further include a broad spectrum adapter mirror 103, where the broad spectrum adapter mirror 103 may be disposed between the endoscope optical system 101 and the broad spectrum detector 104, for adjusting a focal length and an object distance.

In another embodiment of the present specification, the endoscopic image pickup device may further include a filter. As shown in fig. 1, the optical filter 105 may be disposed between the broad spectrum adapter mirror 103 and the broad spectrum detector 104, and may be coated with an optical film with high reflection for 400nm to 650nm and 820nm to 1000nm, and high reflection for 700nm to 820 nm. After the near infrared laser light source irradiates the ICG substance, 820 nm-900 nm fluorescence can be generated, and then imaging output is carried out through an endoscope imaging system. In this process, the light generated by the laser light source is also reflected into the optical system, which may cause light pollution to the imaging system.

By adding the optical filter in front of the broad spectrum detector, the light partially reflected into the endoscope optical system by the laser illumination light source can be filtered, the influence of the light in the wave band range on the final imaging effect is eliminated, and the final imaging effect is improved. In some embodiments, the optical filter may have no optical power and be a lens with both surfaces being planar.

The structure provided by the embodiment of the specification can realize imaging of visible light and near infrared light by adopting a wide spectrum detector, so that the endoscope optical system can be designed into a single-light-path imaging system, the design complexity of the optical system is further reduced, and the convenience of practical operation is improved.

The endoscope imaging device provided by the embodiment of the specification can adopt a structure with a single light path and a single detector to realize imaging of a wide spectrum segment consisting of white light and near infrared light, and has the advantages of simple structure, small volume, simple and convenient operation, long service life and the like.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present specification. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. The drawings in this description are only schematic and do not represent actual structures of the various components.

The foregoing is merely an example of one or more embodiments of the present specification and is not intended to limit the one or more embodiments of the present specification. Various modifications and alterations to one or more embodiments of this description will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the present specification, should be included in the scope of the claims.

Claims

1. An endoscope image pickup device is characterized by comprising an active light source, a light guide optical fiber and an endoscope, wherein the endoscope comprises an endoscope optical system and a wide spectrum detector, and the wide spectrum detector is arranged at an output end of optical path transmission of the endoscope optical system;

The active light source is used for generating illumination light beams with the spectral width of 400-820 nm, the active light source is connected with the light guide optical fiber, the illumination light beams generated by the active light source are transmitted through the light guide optical fiber and then irradiate the object space of the endoscope optical system to generate fluorescent light with the spectral width of 820-900 nm, the fluorescent light generated by the object space passes through the endoscope optical system and then is received by the wide spectrum detector, and the endoscope optical system is a single-light-path imaging system;

The broad spectrum detector is used for converting a received optical signal into an electric signal so as to convert image information represented by the optical signal into image information represented by the electric signal, a piece of broad spectrum detector chip is adopted by the broad spectrum detector, and the piece of broad spectrum detector chip is also used for imaging a broad spectrum of 400-900 nm.

2. The endoscopic camera device according to claim 1, wherein the active light source comprises a white LED light source and a mid-infrared laser light source.

3. The endoscopic imaging apparatus according to claim 1, wherein the led light source and the mid-infrared laser light source of the active light source are coupled into the light guide fiber through a focusing lens after passing through a dichroic mirror, respectively.

4. The endoscopic imaging device of claim 1, further comprising a broad spectrum adapter mirror disposed between the endoscope optical system and the broad spectrum detector for adjusting focal length and object distance.

5. The endoscopic camera device according to claim 4, wherein an optical filter is further provided between the broad spectrum adapter mirror and the broad spectrum detector, and an optical film with high reflection to 400 nm-650 nm and 820 nm-1000 nm and high reflection to 700 nm-820 nm is coated on the optical filter.