CN210155408U

CN210155408U - Miniature imaging microscope

Info

Publication number: CN210155408U
Application number: CN201921265816.1U
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: 2019-01-24
Filing date: 2019-08-06
Publication date: 2020-03-17
Anticipated expiration: 2029-08-06
Also published as: CN111474697A; CN110794564A; CN211086791U; CN210155409U

Abstract

The utility model relates to the technical field of optical imaging, and discloses a miniature imaging microscope, which comprises an outer shell, wherein a lens is arranged in the outer shell, the lens comprises an objective lens and a focusing lens, a dichroic mirror scanner is arranged on a light path between the objective lens and the focusing lens, the dichroic mirror scanner is positioned on a back focal plane of the objective lens, and a photoelectric detector for receiving optical signals of the focusing lens is arranged behind the light path of the focusing lens; the dichroic mirror scanner is used for reflecting laser generated by the laser transmitter to the objective lens; the dichroic mirror scanner is used for transmitting the nonlinear optical signal passing through the objective lens to a focusing lens behind the optical path. This scheme adopts and inserts the dichroic mirror scanner between objective and focusing lens for miniature imaging microscope's volume is littleer and weight is lighter, can compromise the big field of vision of microscope observation and the little volume of microscope size simultaneously, facilitates the use more.

Description

Miniature imaging microscope

Technical Field

The utility model relates to an optical imaging technical field, concretely relates to miniature imaging microscope.

Background

Micro-objectives play a very important role in endoscopes and other micro-imaging devices. In particular for fluorescence microscopy, single photon excitation fluorescence Imaging with a medium-low Numerical Aperture (NA <0.6) micro-objective has been used in gastrointestinal AutoFluorescence Imaging (AFI) and Confocal laser (Confocal) endoscopic Imaging. For such a micro microscope objective, because it is related to the combination with a commercial endoscope to achieve the purpose of endoscopic imaging, in order to satisfy the requirement of endoscopic imaging, a tube lens and a scan lens must be provided to achieve the required functions, however, the tube lens and the scan lens have complicated structures, so that the micro microscope is too large in volume and heavy, which is not favorable for the use of the micro microscope.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a miniature imaging microscope to solve among the prior art problem that the microscope structure is complicated, bulky.

In order to achieve the above object, the basic scheme of the present invention is as follows:

a miniature imaging microscope comprises a shell, wherein a lens is arranged in the shell and comprises an objective lens and a focusing lens, a dichroic mirror scanner is arranged on a light path between the objective lens and the focusing lens and is positioned on a back focal plane of the objective lens, and a photoelectric detector for receiving optical signals of the focusing lens is arranged behind the light path of the focusing lens; the dichroic mirror scanner is used for reflecting laser generated by the laser transmitter to the objective lens; the dichroic mirror scanner is used for transmitting the nonlinear optical signal passing through the objective lens to a focusing lens behind the optical path.

The technical principle is as follows: when the scheme is adopted, laser emitted by the laser emitter is reflected to the objective lens by the dichroic mirror scanner, the objective lens converges the laser from the dichroic mirror scanner to the measured object so as to excite the measured object to generate a nonlinear optical signal, and the nonlinear optical signal generated by excitation finally reaches the photoelectric detector through the objective lens, the dichroic mirror scanner and the focusing lens in sequence to complete image acquisition.

Compare the beneficial effect in prior art:

this scheme inserts the dichroic mirror scanner between objective and focusing lens for reflection to laser and transmission to nonlinear optical signal all go on in the dichroic mirror scanner, do not need to adopt lens-barrel lens among the prior art and scanning lens to reach image data acquisition function, therefore the structure of this scheme is simple relatively, the size is little and light in weight, after the use of dichroic mirror scanner cooperation objective and focusing lens, can compromise the big field of vision and the little volume of microscope size that the microscope surveyd simultaneously, be favorable to miniature microscope's use.

Further, the dichroic mirror scanner comprises a dichroic mirror and a driver which does not affect transmission of the nonlinear optical signal, the dichroic mirror is connected with the driver, and the driver can drive the dichroic mirror to rotate along the vertical direction of the optical path.

Has the advantages that: the dichroic lens in the scheme plays the role of a dichroic mirror in the prior art, and achieves the functions of reflecting laser and transmitting nonlinear optical signals; the driver can not influence the transmission of nonlinear optical signal, but also can realize the rotation of dichroic lens through the driver, and the dichroic mirror rotates the in-process and makes the laser assemble the position on the measured object and change, and then makes the different positions of measured object aroused and produce nonlinear optical signal for the image data of the measured object that photoelectric detector detected is more comprehensive.

Further, the number of the objective lenses is at least one; the focal length can be conveniently adjusted according to different measured objects.

Further, the number of the focusing lenses is at least one; the adjustment of the focal length is facilitated so that the image received by the photodetector is sharp.

Further, the dichroic lens is made of fused quartz; the surface of the quartz is easy to clean by adopting a fused quartz material.

Furthermore, the objective lens is made of optical glass or high molecular polymer.

Furthermore, the focusing lens is made of optical glass or high molecular polymer.

The objective lens or the focusing lens made of optical glass or high molecular polymer has light weight and small weight, is favorable for reducing the weight of a microscope, and is more suitable for collecting image data of a measured object.

Further, the objective lens is manufactured by adopting a die pressing processing technology.

Further, the focusing lens is manufactured by adopting a mould pressing processing technology.

The mould pressing processing is for traditional processing mode, and direct compression moulding need not pass through processes such as corase grind, finish grinding and polishing like traditional technique, can guarantee that the size precision, the shape of face precision and the roughness of the product of processing out are all higher.

Further, the numerical aperture of the objective lens is any numerical value between 0.5 mm and 1.2 mm; the resolution of the objective lens is better in the range, so that the imaging effect is better.

Drawings

Fig. 1 is a schematic view of an optical structure according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a dichroic mirror scanner according to an 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: a first objective lens piece 1, a second objective lens piece 2, a first focusing lens piece 3, a second focusing lens piece 4, a dichroic mirror scanner 5, a dichroic piece 6, a driver 7.

The embodiment is basically as shown in the attached figure 1:

the utility model provides a miniature imaging microscope, includes the shell, installs the camera lens in the shell, and the camera lens includes laser emitter and the objective, dichroscope mirror scanner 5, focusing lens and the photoelectric detector that arrange in proper order along the light path, and laser emitter adopts optic fibre laser emitter, and objective and focusing lens separation set up, and dichroscope mirror scanner 5 is located the back focal plane of objective.

The dichroic mirror scanner 5 is used for reflecting the laser generated by the laser emitter to the objective lens; the dichroic mirror scanner 5 is used to transmit the nonlinear optical signal passing through the objective lens onto the focusing lens behind the optical path.

The dichroic mirror scanner 5 comprises a dichroic mirror 6 and a driver 7 which does not influence the transmission of nonlinear optical signals, the driver 7 is an annular driver 7, the dichroic mirror 6 is fixedly connected with the driver 7, and the driver 7 can drive the dichroic mirror 6 to rotate along the vertical direction of the optical path; the dichroic mirror 6 is located on the back focal plane of the objective lens (the position of the back focal plane is obtained according to the wavelength of the laser emitted by the laser emitter, which belongs to the prior art and is not described here), and the dichroic mirror 6 reflects the laser and transmits the nonlinear optical signal.

The dichroic mirror 6 is circular, has a diameter of 0.8 mm and a thickness of 0.145 mm, and is made of fused quartz. The driver 7 is a micro-electromechanical driver 7.

The objective lens and the focusing lens are both made of optical glass or high molecular polymer materials by adopting a mould pressing processing technology; the numerical aperture of the objective lens is 0.815 mm, and the length of the objective lens is 1 mm; the numerical aperture of the focusing objective lens is 0.4 mm, and the length of the focusing objective lens is 2.227 mm;

the objective lens comprises a first objective lens 1 and a second objective lens 2, the first objective lens 1 having an opposite object-side surface S11 and an opposite image-side surface S12, the second objective lens 2 having an opposite object-side surface S21 and an opposite image-side surface S22; the focusing lens includes a first focusing lens piece 3 and a second focusing lens piece 4, the first focusing lens piece 3 having an opposite object side surface S31 and an opposite image side surface S32, the second focusing lens piece 4 having an opposite object side surface S41 and an opposite image side surface S42.

Wherein the objective lens is required to satisfy the conditions listed in table 1 below; the focusing lens needs to satisfy the conditions listed in table 2 below.

TABLE 1

TABLE 2

The specific implementation process is as follows:

the laser emitted by the laser emitter is reflected to the objective lens by the dichroic lens 6, the objective lens converges the laser from the dichroic lens 6 to the object to be measured (the object to be measured is positioned on the left side of the first objective lens 1 in fig. 1) to excite the object to be measured to generate a nonlinear optical signal, and the nonlinear optical signal generated by excitation sequentially passes through the objective lens, the dichroic mirror scanner 5 and the focusing lens and finally reaches the photoelectric detector to complete the image acquisition.

In the process of image acquisition, driver 7 drives dichroic lens 6 and rotates along the direction of perpendicular to light path, and the dichroic mirror makes the laser assemble the position on the measured object and changes during the rotation, and then makes the different positions of measured object aroused and produce nonlinear optical signal for the image data of the measured object that photoelectric detector detected is more comprehensive.

This embodiment inserts dichroic mirror scanner 5 between objective and focusing lens for reflection to laser and transmission to nonlinear optical signal all go on in dichroic lens 6, need not adopt lens-barrel lens among the prior art and scanning lens to reach image data acquisition function, therefore the structure of this scheme is simpler relatively, the size is little and light in weight, after dichroic mirror scanner 5 cooperation objective and focusing lens's use, can compromise the big field of vision and the little volume of microscope size that the microscope surveyd simultaneously, be favorable to miniature microscope's use.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that variations and modifications can be made by those skilled in the art without departing from the structure of the invention. These should also be considered as the scope of protection of the present invention, and these do not affect the effect of the implementation of the present invention and the utility 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. The utility model provides a miniature imaging microscope, includes the shell, is equipped with the camera lens in the shell, and the camera lens includes objective and focusing lens, its characterized in that: a dichroic mirror scanner is arranged on a light path between the objective lens and the focusing lens, the dichroic mirror scanner is positioned on a back focal plane of the objective lens, and a photoelectric detector for receiving optical signals of the focusing lens is arranged behind the light path of the focusing lens;

the dichroic mirror scanner is used for reflecting laser generated by the laser transmitter to the objective lens; the dichroic mirror scanner is used for transmitting the nonlinear optical signal passing through the objective lens to a focusing lens behind the optical path.

2. The miniature imaging microscope of claim 1, wherein: the dichroic mirror scanner comprises a dichroic mirror and a driver which does not affect transmission of nonlinear optical signals, the dichroic mirror is connected with the driver, and the driver can drive the dichroic mirror to rotate along the vertical direction of a light path.

3. The miniature imaging microscope of claim 1, wherein: the number of the objective lenses is at least one.

4. The miniature imaging microscope of claim 1, wherein: the number of the focusing lenses is at least one.

5. The miniature imaging microscope of claim 2, wherein: the dichroic lens is made of fused quartz.

6. The miniature imaging microscope of claim 1, wherein: the objective lens is made of optical glass or high molecular polymer.

7. The miniature imaging microscope of claim 1, wherein: the focusing lens is made of optical glass or high molecular polymer.

8. The miniature imaging microscope of claim 1, wherein: the objective lens is manufactured by adopting a mould pressing processing technology.

9. The miniature imaging microscope of claim 1, wherein: the focusing lens is manufactured by adopting a mould pressing processing technology.

10. The miniature imaging microscope of claim 1, wherein: the numerical aperture of the objective lens is any numerical value between 0.5 mm and 1.2 mm.