CN210573035U

CN210573035U - Miniature endoscope

Info

Publication number: CN210573035U
Application number: CN201921247898.7U
Authority: CN
Inventors: 不公告发明人
Original assignee: Suzhou Yibolun Photoelectric Instrument Co Ltd
Current assignee: Suzhou Yibolun Photoelectric Instrument Co Ltd
Priority date: 2019-03-19
Filing date: 2019-08-02
Publication date: 2020-05-19
Anticipated expiration: 2029-08-02
Also published as: CN210166579U; CN210166580U; CN210155423U; CN210243982U; CN111722407A; CN111722405A; CN210155429U; CN210155422U; CN210155428U; CN210155424U; CN210155426U; CN210155425U; CN210155427U; CN210166581U; CN111722406A

Abstract

The utility model relates to a medical diagnosis imaging device technical field, concretely relates to miniature endoscope, including microscopic imaging probe, be equipped with the scanner in the microscopic imaging probe, the scanner includes the driver and the mirror surface fixed with the driver, and the driver is used for changing the angle of mirror surface according to the instruction, the mirror surface includes reciprocal anchorage's ultrathin section and photoelectric detector, be fixed with optical film on the ultrathin section, optical film includes dichroic mirror film, and optical film still includes filtering film, and filtering film is located between dichroic film and the ultrathin section. The function that needs four devices just can accomplish in the present endoscope has been realized through the scanner to this scheme, has reduced the quantity of device in the miniature imaging probe, lets miniature imaging probe volume and weight obtain reducing, has solved the problem that the volume of the miniature imaging probe of endoscope can't shrink among the prior art.

Description

Miniature endoscope

Technical Field

The utility model relates to a medical diagnosis imaging device technical field, concretely relates to miniature endoscope.

Background

With the development of science and technology, medical endoscopes have been widely used in the medical field, and are one of the important tools for human body to peep and treat organs in the human body. The structure of the endoscope is greatly improved four times in the development process of over 200 years, and the image quality of the endoscope from the primary hard tube type endoscope, the semi-curved type endoscope to the fiber endoscope and the current electronic endoscope is also in a secondary leap. At present, the endoscope can obtain a color photo or a color television image by using LED illumination, and meanwhile, the image is not a common image of a tissue organ, but a microscopic image observed under a microscope, and tiny lesions are clear and distinguishable. According to the existing clinical experience, the smaller the volume of the miniature imaging probe of the endoscope and the shorter the rigid section, the pain of the patient can be reduced to the greatest extent, so that the endoscope is always developed towards miniaturization.

At present, laser emitted from an endoscope is rapidly changed in beam direction by a scanner, passes through an objective lens and is projected onto a detection object, the detection object excites fluorescence photons, the fluorescence photons are collected by a lens and are subjected to photoelectric conversion by a photoelectric detector, and detection is finally realized. However, the system structure based on the light source-scanner-lens (optional) -observed object-lens-scanner (optional) -photodetector scheme is too complex for the endoscope, so that the miniature imaging probe of the endoscope is large in volume, and the system cannot be reduced in volume by reducing all elements.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a miniature endoscope solves the problem that the volume of the miniature imaging probe of endoscope can't be reduced among the prior art.

The scheme is basically as follows:

a miniature endoscope comprises a microscopic imaging probe, a scanner is arranged in the microscopic imaging probe, the scanner comprises a driver and a mirror surface fixed with the driver, the driver is used for changing the angle of the mirror surface according to instructions, the mirror surface comprises an ultrathin sheet and a photoelectric detector which are fixed with each other, an optical film is fixed on the ultrathin sheet, and the optical film comprises a dichroic mirror film.

The optical film further includes a filter film positioned between the dichroic film and the ultrathin sheet.

Has the advantages that: the excitation light and the emission light of the detected object have different wavelengths, the dichroic mirror film is used for reflecting the excitation light to the detected object, the emission light excited by the observed object passes through the dichroic mirror film, and the photoelectric detector receives the emission light passing through the dichroic mirror film for photoelectric conversion. The driver can change the inclination angle of the mirror surface to achieve the purpose of changing the reflection angle of the laser, so as to realize the scanning of the excited laser to the observed object. Through the surface setting at the driver including optical film and photoelectric detector's mirror surface for this scheme has realized the function that needs four devices to accomplish among the prior art through a device (with arouse light and emission light separately, change the reflection angle of arouse light in order to realize the scanning, with the arouse light filtering with carry out photoelectric conversion), lets scanning device possess four functions simultaneously, has reduced the quantity of device in the miniature imaging probe, lets miniature imaging probe volume and weight obtain reducing.

Furthermore, the driver comprises a plurality of mirror bodies, the mirror surfaces are fixed on the mirror bodies, and the mirror bodies are in any axisymmetric shapes such as polygons, circles or ellipses.

The mirror body can play a role in supporting the mirror surface. The mirror body is in any axisymmetric shape such as Polygon, circle or ellipse, and can realize various scanning conditions, thereby forming various scanners (such as two-dimensional scanners, polyhedral scanners, etc.).

Further, the driver is a galvanometer mirror or a resonant scanner or a polygon scanner or a micro-electro-mechanical system scanner.

The volume of the driver can be reduced as much as possible, which is beneficial to reducing the volume of the miniature imaging probe.

Further, the photodetector is a photodiode, a phototriode, a photomultiplier, a charge coupled device or a metal semiconductor oxide device. The photoelectric conversion device can be applied to the photodetector in the present embodiment.

Furthermore, the lens body adopts optical glass, high molecular polymer, semiconductor material, metal, carbon fiber or a mixture of the above materials. The structure forms the mirror body, is easy to process and consider the cost, simultaneously ensures that the hardness of the mirror body can meet the function of supporting the mirror surface, and the connection performance of the mirror body is suitable for being connected with the mirror surface.

Further, the ultrathin sheet has a thickness in the range of 390nm to 1720nm, and light in an arbitrary wavelength range has a transmittance of 50% or more in this thickness range.

The ultrathin slice is in the thickness range and ensures that light in any wavelength range has the transmittance of more than 50 percent, and the ultrathin slice has small volume on the premise of not influencing the transmittance and the imaging quality, thereby being beneficial to reducing the volume of the miniature imaging probe.

Furthermore, the ultrathin sheet adopts a structure of optical glass, high molecular polymer, semiconductor material or a mixture of the optical glass, the high molecular polymer and the semiconductor material.

Therefore, the ultrathin sheet has wide selection range and is beneficial to considering multiple factors of cost and volume.

Further, the photodetector is a two-dimensional photodetector device. Thus, the method is beneficial to two-dimensional imaging and meets the requirement of general endoscope diagnosis.

Further, the objective lens is a high dispersion objective lens.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the endoscopic micro imaging probe of the present invention.

Fig. 2 is a schematic structural diagram of a scanner according to a first embodiment of the present invention.

Fig. 3 is a schematic working diagram of a dichroic mirror according to a first embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a scanner according to a second embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a scanner according to a third embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a scanner according to a fourth embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a photoelectric detector 1, a dichroic mirror film 2.1, an ultrathin sheet 2.2, a filter film 2.3, a driver 3, an external optical fiber 51, a micro imaging probe 5, an external reflector 52, an external lens 53, a scanner 6, an external objective 54 and an object to be detected 9.

The first embodiment is basically as follows:

a miniature endoscope, as shown in figure 1, comprises a miniature imaging probe 5, the miniature imaging probe 5 comprises a shell, the shell is a sealing structure made of high polymer materials, an external optical fiber 51 is fixed at the upper end of the shell, and the external optical fiber 51 is used for an incident laser light source. An external mirror 52, an external lens 53, a scanner 6 and an external objective lens 54 are provided in the housing, the external objective lens 54 is fixed to the lower end of the housing, i.e., the front aperture, and the scanner 6 is positioned above the external objective lens 54.

As shown in fig. 2, the scanner 6 includes a driver 3 and a mirror fixed to each other, and the driver 3 includes a mirror body for supporting the mirror. The mirror surface comprises a photoelectric detector 1, an ultrathin sheet 2.2, a light filtering film 2.3 and a dichroic mirror film 2.1 which are fixed in sequence. As shown in fig. 3, the solid line is excitation light, the excitation light is incident laser light, the dotted line is emission light of the object to be detected 9, the dichroic mirror film 2.1 is used for reflecting the excitation light and transmitting the emission light of the object to be detected 9, the filter film 2.3 is used for filtering the excitation light, and the photodetector 1 is used for converting the emission light into an electrical signal.

The driver 3 is a galvanometer mirror or a resonance scanner 6 or a polyhedral scanner or a micro electro mechanical system scanner, etc., and the driver 3 comprises a mirror body made of optical glass or high molecular polymer or semiconductor material or metal or carbon fiber or a mixture of any of the above materials. As shown in fig. 1 and 2, the scanner 6 is a two-dimensional mems scanner, and the driver 3 can rotate the mirror according to the command to change the angle of the mirror.

Wherein the shape of the photodetector 1, the dichroic mirror film 2.1, the ultrathin sheet 2.2 and the filter film 2.3 is circular. The photoelectric detector 1 can adopt a photodiode, a phototriode, a photomultiplier, a charge coupled device or a metal semiconductor oxide device; the ultrathin sheet 2.2 is made of optical glass, high molecular polymer, semiconductor material or a mixture of the above materials, and the thickness of the ultrathin sheet 2.2 is in the range of 390nm to 1720nm, and light in any wavelength range in the thickness range has a transmittance of 50% or more.

Exciting light emitted by an external light source is transmitted by an external optical fiber 51, reflected and collimated by an external reflector 52, focused by an external lens 53 into a linear focus on a dichroic mirror film 2.1 serving as a one-dimensional scanning galvanometer, and reflected by the dichroic mirror film 2.1 for scanning, wherein in online scanning application, the photoelectric detector 1 is a two-dimensional photoelectric detection device, and the two-dimensional scanning galvanometer is an MEMS scanning device. The external objective 54 is a high dispersion objective, and the emitted light (such as single photon fluorescence or nonlinear optical signal) excited in the object to be detected 9 is collected by the external high dispersion objective, passes through the dichroic mirror film 2.1 of the two-dimensional scanning galvanometer, the ultrathin sheet 2.2 and the optical filter 2.3, is focused on the photodetector 1 and converted into an electric signal, and finally is sent to an external amplifying circuit and a computer for processing. Since the wavelength of the emitted light (such as single photon fluorescence or nonlinear optical signal) excited in the object 9 to be detected is shorter than that of the excitation light, and the focal length of the emitted light passing through the external high-dispersion objective lens is smaller than that of the excitation light, the emitted light from the focal point can be focused on the photodetector 1 again after passing through the focus of the external high-dispersion objective lens by selecting appropriate materials and parameters.

Example two: the difference from the first embodiment is that, as shown in fig. 4, the scanner 6 is a one-dimensional mems scanner. The one-dimensional scanning light beam is focused in the detected object 9 by an external high-dispersion objective lens to form a scanning line, and emitted light (such as single-photon fluorescence or nonlinear optical signals) excited in the detected object 9 is collected by the external high-dispersion objective lens, passes through a dichroic mirror film 2.1, an ultrathin sheet 2.2 and an optical filter 2.3 of the one-dimensional scanning galvanometer and is focused on the photoelectric detector 1 and converted into electric signals, and finally, the electric signals are transmitted to an external amplifying circuit and a computer for processing.

Example three: the difference from the first embodiment is that, as shown in fig. 5, the scanner 6 is a scanning galvanometer or resonance scanner, the driver 3, the photodetector 1, the ultrathin sheet 2.2, the filter film 2.3, and the dichroic mirror film 2.1 are all rectangular, and the mirror surface has a direction changeable angle.

Example four: the difference from the first embodiment is that, as shown in fig. 6, the scanner 6 is a polyhedron scanner, the mirror body in the driver 3 is a hexahedral cylinder, and the mirror surfaces (including the photodetector 1, the ultrathin sheet 2.2, the filter film 2.3, and the dichroic mirror film 2.1) are respectively fixed on six surfaces of the mirror body, and the mirror surfaces have an angle that can be changed in one direction.

The above are merely examples of the present invention, and common general knowledge of known specific structures and characteristics in the schemes is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. A miniature endoscope, includes the microscopic imaging probe, is equipped with scanner and external objective in the microscopic imaging probe, the said scanner includes driver and mirror surface fixed with driver, the driver is used for changing the angle of the mirror surface according to the instruction, characterized by that: the mirror surface comprises an ultrathin sheet and a photoelectric detector which are fixed with each other, an optical film is fixed on the ultrathin sheet, and the optical film comprises a dichroic mirror film.

2. A miniature endoscope according to claim 1, wherein: the optical film further includes a filter film positioned between the dichroic mirror film and the ultrathin sheet.

3. A miniature endoscope according to claim 2, wherein: the driver comprises a plurality of mirror bodies, the mirror surfaces are fixed on the mirror bodies, and the mirror bodies are in any axisymmetric shapes such as polygons, circles or ellipses.

4. A miniature endoscope according to claim 3, wherein: the driver is a galvanometer mirror or a resonant scanner or a polyhedral scanner or a micro-electro-mechanical system scanner.

5. The miniature endoscope of claim 4, wherein: the photoelectric detector is a photodiode, a phototriode, a photomultiplier, a charge coupled device or a metal semiconductor oxide device.

6. A miniature endoscope according to claim 5, wherein: the lens body is of a structure of optical glass, high molecular polymer, semiconductor material, metal, carbon fiber or a mixture of the above.

7. A miniature endoscope according to claim 6, wherein: the ultrathin sheet has a thickness in the range of 390nm to 1720 nm; within this thickness range, light in an arbitrary wavelength range has a transmittance of 50% or more.

8. A miniature endoscope according to claim 7, wherein: the ultrathin sheet adopts optical glass, high molecular polymer, semiconductor material or a mixture of the optical glass, the high molecular polymer and the semiconductor material.

9. A miniature endoscope according to any of claims 1-8, wherein: the photodetector is a two-dimensional photodetector device.

10. A miniature endoscope according to claim 9, wherein: the external objective is a high dispersion objective.