CN215687811U

CN215687811U - Laser speckle blood flow imaging system

Info

Publication number: CN215687811U
Application number: CN202121714742.2U
Authority: CN
Inventors: 张红艳
Original assignee: Hubei Xunwei Photoelectric Technology Co ltd
Current assignee: Hubei Xunwei Photoelectric Technology Co ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2022-02-01
Anticipated expiration: 2031-07-26

Abstract

The utility model relates to a laser speckle blood flow imaging system, which comprises an illumination unit, an optical imaging unit, an ocular and a photoelectric imaging device, wherein the illumination unit is used for illuminating blood flow; the optical imaging unit is provided with a light inlet, a first light outlet and a second light outlet, and an optical lens group is arranged in the optical imaging unit; the illumination unit is used for illuminating an observed object, and light spots reflected by the observed object enter the optical imaging unit through the light inlet and are imaged through the optical lens group through the first light outlet and the second light outlet respectively; the first light outlet is connected with the ocular lens, and the second light outlet is connected with the photoelectric imaging device through an optical machine interface; the utility model divides the light into two paths by the optical lens group, so that the optical imaging system can simultaneously image at the first light outlet and the second light outlet, and therefore, when the speckle images are observed by the photoelectric imaging device, the micro-operation can be simultaneously carried out by the ocular lens.

Description

Laser speckle blood flow imaging system

Technical Field

The utility model relates to the technical field of optical imaging, in particular to a laser speckle blood flow imaging system.

Background

Laser speckle blood flow imaging is a regional flow velocity monitoring technology, and is used for monitoring blood flow velocity, blood vessel diameter and blood flow change in a living body, dynamic and non-contact manner with higher spatial resolution and time resolution under the condition of no need of scanning, so as to obtain a plurality of indexes of hemodynamics.

When observing speckle images, if a micro-manipulation operation is to be performed at the same time, two sets of optical systems are usually adopted to realize the observation of the speckle images, and one set of optical system is used for the micro-manipulation operation, so that the cost of the whole system is higher.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problems in the prior art, the utility model provides a laser speckle blood flow imaging system, which can simultaneously meet the requirements of observing speckle images and performing micro-operation operations by establishing a set of optical system.

The technical scheme for solving the technical problems is as follows: a laser speckle blood flow imaging system comprises an illumination unit, an optical imaging unit, an ocular and a photoelectric imaging device; the optical imaging unit is provided with a light inlet, a first light outlet and a second light outlet, and an optical lens group is arranged in the optical imaging unit; the illumination unit is used for illuminating an observed object, and light spots reflected by the observed object enter the optical imaging unit through the light inlet and are imaged through the optical lens group through the first light outlet and the second light outlet respectively; the first light outlet is connected with the ocular lens, and the second light outlet is connected with the photoelectric imaging device through a light machine interface.

The utility model has the beneficial effects that: divide into two the tunnel with light through setting up optical lens group, make optical imaging system form images simultaneously at first light-emitting outlet and second light-emitting outlet, when observing the speckle image through photoelectric imaging device, can also carry out the micro-manipulation operation simultaneously through the eyepiece.

On the basis of the technical scheme, the utility model can be further improved as follows.

Further, the illumination unit includes a laser coherent light source and an LED incoherent light source.

The beneficial effect of adopting the further scheme is that: the light that the coherent light source of laser sent can form the speckle image through photoelectric imaging device after waiting to observe the thing backscatter, and the light that the incoherent light source of LED sent can form the image of waiting to observe the thing again through eyepiece direct observation after waiting to observe the thing backscatter, satisfies the demand of observing the speckle image and carrying out the little operation simultaneously.

Further, the optical lens group comprises a lens group, and the lens group is of a microscopic imaging structure.

The beneficial effect of adopting the further scheme is that: in the application scene of the utility model, the imaging quality of the microscopic imaging structure is obviously superior to that of an industrial lens.

Further, the eyepiece is a binocular eyepiece.

The photoelectric imaging device further comprises a calculation and analysis unit which receives the image data sent by the photoelectric imaging device to perform calculation, display and analysis.

The beneficial effect of adopting the further scheme is that: the flow velocity diagram can be automatically calculated and analyzed for the speckle images through the calculation and analysis unit, and the calculation efficiency is improved.

Drawings

FIG. 1 is a schematic structural diagram of a laser speckle blood flow imaging system according to the present invention;

FIG. 2 is a schematic diagram of an optical imaging unit according to an embodiment of the present invention;

fig. 3 is another schematic structural diagram of an optical imaging unit according to an embodiment of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the device comprises an illumination unit, 2, an optical imaging unit, 21, a light inlet, 22, a first light outlet, 23, a second light outlet, 24, a light splitting device, 25, a switching device, 3, an eyepiece, 4, an optical machine interface, 5, a photoelectric imaging device, 6, a switching unit, 7 and a calculation analysis unit.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.

As shown in fig. 1, the laser speckle blood flow imaging system includes an illumination unit 1, an optical imaging unit 2, an eyepiece 3, a photoelectric imaging assembly 5, a switching unit 6 and a calculation and analysis unit 7.

The illumination unit 1 includes a laser coherent light source and an LED incoherent light source, and is used for illuminating an observed object, wherein laser light emitted by the laser coherent light source is used for blood flow imaging, and incoherent light emitted by the LED incoherent light source is used for auxiliary illumination. The laser light and the incoherent light emitted from the illumination unit 1 are irradiated onto the object to be observed at a set angle, and are backscattered by the object to be observed to enter the optical imaging unit 2.

The optical imaging unit 2 has a light inlet 21, a first light outlet 22 and a second light outlet 23, and an optical lens assembly (not shown) is disposed in the optical imaging unit 2 and is configured to divide the light spots entering the optical imaging unit 2 into two paths and image the two paths respectively. The light spot backscattered by the observed object enters the optical imaging unit 2 from the light inlet 21, is divided into two paths after passing through the optical lens group, and is imaged through the first light outlet 22 and the second light outlet 23 respectively.

The optical imaging unit 2 may adopt a structure as shown in fig. 2, in which the optical lens group includes a lens group for imaging and a light splitting device 24. The light splitting device 24 can select an energy light splitter, a dichroic mirror, a polarization light splitter, and the like, reflect a part of light, and simultaneously make another part of light directly penetrate through, so as to realize simultaneous imaging at the first light outlet 22 and the second light outlet 23.

The optical imaging unit 2 may also adopt a structure as shown in fig. 3, in which the optical lens group includes a lens group for imaging and a switching device 25. The switching device 25 is used for realizing time-sharing imaging at the first light outlet 22 and the second light outlet 23. For example, the switching device 25 may be a push-in or pull-out mirror, which reflects the light to the first light outlet 22 and forms an image at the first light outlet 22 when pushed in, and passes the light directly and forms an image at the second light outlet 23 when pulled out. The switching device 25 may also be other devices capable of switching the optical path, and is not limited herein.

In the two structures of the optical imaging unit 2, the lens group is a microscopic imaging structure, i.e. a system for photographing and imaging a sample observed under a microscope. Preferably, the lens group is a microscopic imaging structure of a stereomicroscope. In the application scene of the utility model, the imaging quality of the microscopic imaging structure is obviously superior to that of an industrial lens. And compared with an industrial lens, the stereoscopic microscope has more stable optical structure due to the precise design (for example, the working distance is fixed, and the working distance is not required to be changed during zooming).

The eyepiece 3 is a binocular eyepiece, preferably the eyepiece of a stereoscopic microscope. The eyepiece 3 is connected to the first light exit 22, and an image of an object to be observed can be observed through the eyepiece 3, thereby facilitating a micromanipulation operation. Preferably, a band-stop filter is placed in front of the eyepiece 3 and used for filtering laser.

The photoelectric imaging device 5 is connected with the second light outlet 23 through the optical-mechanical interface 4, and can image the speckle image into a digital image. The photoelectric imaging device 5 is electrically connected to the calculation and analysis unit 7 through the relay unit 6, and the relay unit 6 is electrically connected to the illumination unit 1. The relay unit 6 can be used to power the electrophotographic device 5 and the illumination unit 1 when needed. The digital image generated by the photo-imaging device 5 is transmitted to the computational analysis unit 7. The calculation and analysis unit 7 is used for automatically calculating and analyzing the flow velocity map of the speckle image, and the calculation efficiency is improved. Preferably, a band-pass filter is placed in front of the photoelectric imaging device 5 or in front of the optical-mechanical interface 4 and used for filtering incoherent light and passing laser; or an electromagnetic control visible light and laser filter switching device is arranged in front of the photoelectric imaging device 5 or the optical machine interface 4.

The utility model divides the light into two paths by arranging the optical lens group, so that the optical imaging system 2 can simultaneously image at the first light outlet 22 and the second light outlet 23, and a user can simultaneously perform micro-operation through the ocular 3 when observing speckle images through the photoelectric imaging device 5. In addition, the lens group can adopt the microstructure of a stereomicroscope, so that the imaging quality is high and the optical structure is stable.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The laser speckle blood flow imaging system is characterized by comprising an illumination unit (1), an optical imaging unit (2), an eyepiece (3) and a photoelectric imaging device (5); the optical imaging unit (2) is provided with a light inlet (21), a first light outlet (22) and a second light outlet (23), and an optical lens group is arranged in the optical imaging unit (2); the illumination unit (1) is used for illuminating an observed object, light spots reflected by the observed object enter the optical imaging unit (2) through the light inlet (21) and are imaged through the optical lens group through the first light outlet (22) and the second light outlet (23) respectively; the first light outlet (22) is connected with the eyepiece (3), and the second light outlet (23) is connected with the photoelectric imaging device (5) through a light machine interface (4).

2. A laser speckle blood flow imaging system according to claim 1, wherein the illumination unit (1) comprises a laser coherent light source and an LED incoherent light source.

3. The laser speckle blood flow imaging system according to claim 1, wherein a band-stop filter for filtering laser light is placed in front of the eyepiece (3).

4. The laser speckle blood flow imaging system according to claim 1, wherein a band-pass filter for filtering non-coherent light, passing laser light, or an electromagnetic control visible light and laser filter switching device is placed in front of the photoelectric imaging device (5) or in front of the optical-mechanical interface (4).

5. The laser speckle blood flow imaging system of claim 1, wherein the optical lens group comprises a lens group, and the lens group is a microscopic imaging structure.

6. The laser speckle blood flow imaging system according to claim 1, wherein the eyepiece (3) is a binocular eyepiece.

7. The laser speckle blood flow imaging system according to claim 1, further comprising a computational analysis unit (7), the computational analysis unit (7) being electrically connected to the optoelectronic imaging device (5).