A multifunctional illumination light source for a surgical microscope and a surgical microscope

Abstract

This invention discloses a multifunctional illumination source for a surgical microscope and a surgical microscope in general. The multifunctional illumination source includes multiple illumination unit groups and a focusing optical group. Each illumination unit group includes a light-emitting chip and a collimating optical assembly. The collimating optical assembly includes a first aspherical lens and a second aspherical lens arranged sequentially along the light path emitted from the light-emitting chip. The first aspherical lens collects the divergent light emitted by the light-emitting chip, and the second aspherical lens collimates the collected light into parallel light. The focusing optical group is positioned on the optical path of the parallel light output from the collimating optical assembly to converge the parallel light to the desired illumination area. Using this design, the illumination source features high efficiency, high uniformity, and wide adjustable color temperature, effectively improving the clarity of the surgical field and tissue resolution.

Description

Technical Field

[0001] This invention relates to the field of medical optical equipment technology, and more particularly to a multifunctional illumination source for a surgical microscope and a surgical microscope. Background Technology

[0002] Surgical microscopes are crucial equipment for performing delicate surgical procedures, and the performance of their illumination source directly affects the safety and precision of the surgery. Currently, traditional surgical microscopes mostly use xenon lamps as their light source, but these have drawbacks such as short lifespan (approximately 500 hours), high replacement costs, and the need for a backup light source, resulting in a large module size.

[0003] In existing technologies, surgical microscopes typically employ a structure with seven light-emitting chips encapsulated in a lens, controlling the LEDs in two groups. However, this approach has at least the following drawbacks: 1) Due to space constraints, the light energy collection efficiency is low, the uniformity is poor, and the light spot exhibits a bright center and dark edges; 2) The color temperature is singular, making it impossible to achieve wide-range, continuous, stepless color temperature adjustment, which is insufficient to meet the contrast requirements of different surgical tissues. Summary of the Invention

[0004] This invention provides a multifunctional illumination source and surgical microscope for use in surgical microscopes, solving problems such as low light energy collection efficiency, poor illumination uniformity, and non-continuous color temperature adjustment in the prior art.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a multifunctional illumination source for a surgical microscope, comprising:

[0006] Multiple illumination unit groups, each of which includes a light-emitting chip and a collimating optical component:

[0007] The collimating optical component includes a first aspherical lens and a second aspherical lens arranged sequentially along the light path of the light-emitting chip: the first aspherical lens is used to collect the divergent light emitted by the light-emitting chip; the second aspherical lens is used to collimate the collected light into parallel light.

[0008] A focusing optical group is positioned in the optical path of the parallel light output from the collimating optical component to converge the parallel light to the desired illumination area.

[0009] Optionally, the light-emitting chip integrates n sub-light-emitting chips with independently controllable power; where n≥2, and n is an integer.

[0010] Optionally, by independently controlling the switching and power of different lighting unit groups or different sub-light-emitting chips within the same lighting unit group, stepless continuous color temperature adjustment within the range of 2700K to 8500K can be achieved.

[0011] Optionally, at least two of the plurality of independently controllable sub-light-emitting chips have different color temperatures and / or wavelengths.

[0012] Optionally, the multifunctional lighting source further includes a microlens array disposed in the optical path between the second aspherical lens and the focusing optical group, for homogenizing parallel light.

[0013] Optionally, the focusing optics group includes at least three focusing lenses arranged sequentially along the optical path transmission direction;

[0014] The focal length of the focusing optical group ranges from 20mm to 50mm, the total length from the first lens surface to the last lens surface ranges from 30mm to 60mm, and the subsequent working distance ranges from 5mm to 40mm.

[0015] Optionally, all the second aspherical lenses in the plurality of illumination unit groups are integrated into a single aspherical lens array or are array structures fixed by mechanical means.

[0016] Optionally, the parallel light collimated by the second aspherical lens has a full-angle divergence angle of less than or equal to 6°.

[0017] Optionally, with one of the lighting unit groups as the center, the plurality of lighting unit groups are arranged in a centrally symmetrical manner, and the uniformity of illumination is achieved by controlling the symmetrical switching of the plurality of light-emitting chips.

[0018] Based on the same inventive concept, embodiments of the present invention also provide a surgical microscope, including the multifunctional illumination source for the surgical microscope provided in the first aspect.

[0019] In summary, this invention provides a multifunctional illumination source for surgical microscopes. This source includes multiple illumination unit groups and a focusing optics group. Each illumination unit group consists of a light-emitting chip and a collimating optical assembly. The collimating optical assembly employs a first aspherical lens and a second aspherical lens arranged sequentially along the optical path, respectively used to collect the diverging light emitted by the light-emitting chip and collimate it into parallel light. The focusing optics group then converges the parallel light to the desired illumination area. The light-emitting chip integrates multiple independently controllable sub-light-emitting chips. By independently controlling the switching and power of different chips, stepless continuous color temperature adjustment within the range of 2700K to 8500K can be achieved. Using this scheme, the illumination source features high efficiency, high uniformity, and wide adjustable color temperature, effectively improving the clarity of the surgical field and tissue resolution. Attached Figure Description

[0020] Figure 1 This is a side view of a multifunctional illumination source for a surgical microscope provided by the present invention.

[0021] Figure 2 This is a side view of a multi-group lighting unit assembly provided by the present invention;

[0022] Figure 3 A schematic diagram of the collimated optical path structure of a set of illumination unit groups provided by the present invention;

[0023] Figure 4 A schematic diagram of the collimating optical path structure of a focusing optical group provided by the present invention;

[0024] Figure 5 This invention provides an application schematic diagram of a collimating optical path structure for a focusing optical group;

[0025] Figure 6 A schematic diagram of the object surface (back side) of a multi-functional lighting source provided by the present invention;

[0026] Figure 7 A schematic diagram of the back side of another multi-group multifunctional lighting source four-in-one encapsulated chip provided by the present invention;

[0027] Figure 8 A schematic diagram of the back side of another multi-group multifunctional lighting source six-in-one encapsulated chip provided by the present invention;

[0028] Figure 9 A schematic diagram of the image plane (front view) of a multi-group multifunctional lighting source provided by the present invention;

[0029] Figure 10 A schematic diagram of the image plane (front view) of another multi-group multifunctional lighting source provided by the present invention;

[0030] Figure 11 A simulated light spot uniformity distribution diagram of the multifunctional lighting source provided by the present invention;

[0031] Figure 12 A simulated color temperature and color rendering index diagram for the multifunctional lighting source provided by the present invention.

[0032] Figure 13 This is a side view of another multifunctional illumination source for a surgical microscope provided by the present invention.

[0033] Figure 14 This is an optical path diagram of a multifunctional illumination source for a surgical microscope provided by the present invention.

[0034] The accompanying diagram is described as follows:

[0035] 1. Illumination unit group; 10. Light-emitting chip; 20. Collimating optical assembly; 11. First aspherical lens; 12. Second aspherical lens; 13. Sub-light-emitting chip; 2. Focusing optical group; 21. First focusing lens; 22. Second focusing lens; 23. Third focusing lens; 3. Microlens array; 4. Optical fiber; 5. Microscope objective lens. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the invention and not all structures. Various modifications and variations can be made to the present invention without departing from its spirit or scope, which will be apparent to those skilled in the art. Therefore, the present invention is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided in the present invention can be combined with each other without contradiction.

[0037] The present invention addresses one or more of the aforementioned problems existing in the prior art by providing a multifunctional illumination source for a surgical microscope. Figure 1 This is a side view of a multifunctional illumination source for a surgical microscope provided by the present invention. Figure 2 This is a side view of a multi-group lighting unit assembly provided by the present invention. Figure 3 A schematic diagram of the collimated optical path structure of a set of illumination unit groups provided by the present invention. Figure 4 This is a schematic diagram of the collimating optical path structure of a focusing optical group provided by the present invention, for reference. Figures 1-4 The multifunctional illumination source for surgical microscopes provided in this embodiment of the invention includes multiple illumination unit groups 1 and focusing optical groups 2.

[0038] Each lighting unit group 1 includes a light-emitting chip 10 and a set of collimating optical components 20. The light-emitting chip 10 includes any one or more combinations of cool white light-emitting chips, warm white light-emitting chips, pure red light-emitting chips, deep blue light-emitting chips, or cyan light-emitting chips.

[0039] refer to Figure 1 and Figure 2 The collimating optical component 20 includes a first aspherical lens 11 and a second aspherical lens 12 arranged sequentially along the output light path of the light-emitting chip 10. The first aspherical lens 11 is an aspherical convex lens used to collect the diverging light emitted from the light-emitting chip 10, thus converging the diverging light. The second aspherical lens 12 is also an aspherical lens, used to collimate the collected light into parallel light, thereby ensuring uniform emission. Figure 1 In this context, F represents the object plane, and F' represents the image plane.

[0040] For example, an illumination unit group 1 is used, paired with a first aspherical lens 11 and a second aspherical lens 12. Both lenses are aspherical lenses, and their optical parameters are shown in Table 1. Figure 2 According to Table 1, experimental tests show that the illumination light emitted from the light-emitting chip 10 is parallel light after being collimated by the second aspherical lens 12, and its divergence angle is less than or equal to 6°, which meets the illumination requirements of the surgical microscope.

[0041] Table 1 Optical parameters of aspherical lenses

[0042]

[0043] refer to Figure 1 and Figure 4 The focusing optics group 2 is positioned on the optical path of the parallel light output from the collimating optics assembly 20, and is used to converge the parallel light to the desired illumination area. Specifically, the focusing optics group 2 is positioned after the microlens array, and includes three focusing lenses arranged sequentially along the optical path propagation direction, such as a first focusing lens 21, a second focusing lens 22, and a third focusing lens 23. Exemplarily, as shown in Table 2, the specific design parameters of the focusing optics group 2 provided in this embodiment of the invention are as follows.

[0044] Table 2 Specific design parameters of the focusing optics group

[0045]

[0046] Wherein, number 2 is the incident surface of the illumination light of the first focusing lens 21, number 3 is the exit surface of the illumination light of the first focusing lens 21, number 4 is the incident surface of the illumination light of the second focusing lens 22, number 5 is the exit surface of the illumination light of the second focusing lens 22, number 6 is the incident surface of the illumination light of the third focusing lens 23, and number 7 is the exit surface of the illumination light of the third focusing lens 23. The units for radius of curvature, spacing, and lens outer diameter are millimeters per millimeter (mm).

[0047] Based on the above embodiments, the focal length of the focusing optical group 2 ranges from 20mm to 50mm, the total length from the first lens surface 21 to the last lens surface (the exit surface of the illumination light from the third focusing lens 23) ranges from 30mm to 60mm, and the subsequent working distance ranges from 5mm to 40mm. For example, the focal length of the focusing optical group 2 is 35mm, the total length from the first lens surface 21 to the last lens surface (the exit surface of the illumination light from the third focusing lens 23) is 40mm, and the subsequent working distance is 18mm. This invention, by rationally setting the radius of curvature, refractive index, spacing, Abbe coefficient, and lens outer diameter of the three lenses, refocuses the parallel light output from the collimating optical component 20 onto the desired illumination area, achieving precise illumination.

[0048] Combination Figure 1 As shown in Table 1, the multifunctional lighting source also includes an aperture P, which is disposed in the optical path between the collimating optical assembly 20 and the focusing optical assembly 2, and is used to constrain the aperture of parallel light.

[0049] Based on the above embodiments, continue to refer to Figure 1 As shown, the multifunctional lighting source also includes a microlens array 3, which is disposed in the optical path between the second aspherical lens 12 and the focusing optical group 2, for homogenizing the parallel light and further eliminating boundary marks between the unit groups.

[0050] In one embodiment of the present invention, the emitted light from the multifunctional lighting source can also directly enter the optical fiber for use in illuminating other optical systems. Figure 5 This is a schematic diagram illustrating the application of a collimating optical path structure for a focusing optical group provided by the present invention. (See diagram below.) Figure 5 As shown, the illumination light emitted from multiple illumination units of the multifunctional illumination source is homogenized by a microlens array, then converged and collimated by focusing optics group 2 before entering optical fiber 4 for total internal reflection and transmission to optical system 6 for illumination. This optical system 6 can be either a surgical microscope or a non-surgical display microscope.

[0051] Figure 6 This is a schematic diagram of the object surface (back side) of a multi-functional lighting source provided by the present invention. Figure 7 This is a schematic diagram of the object plane (back side) of another multi-group multifunctional lighting source four-in-one encapsulated chip provided by the present invention. Figure 8 This is a schematic diagram of the object plane (back side) of another multi-group multi-functional lighting source six-in-one encapsulated chip provided by the present invention. Based on the above embodiments, refer to... Figures 6-8The light-emitting chip 10 integrates n independently controllable sub-light-emitting chips 13, i.e., an n-in-one structure, where n ≥ 2 and n is an integer. The sub-light-emitting chips 13 include one or more combinations of cool white light-emitting chips, warm white light-emitting chips, pure red light-emitting chips, deep blue light-emitting chips, or cyan light-emitting chips. The light-emitting chip 10 provided in this embodiment can be divided into various forms such as two-in-one, four-in-one, or seven-in-one, and the number of chips can be further increased within the limits of process capability. The power of each sub-light-emitting chip 13 within the encapsulated chip can be independently controlled, thereby achieving flexible adjustment of color temperature and light energy.

[0052] In a preferred embodiment of the present invention, n > 2. The present invention controls at least two of the multiple independently controllable sub-light-emitting chips 13 to have different color temperatures and / or wavelengths.

[0053] The sub-light-emitting chip 13 can be selected from conventional cool white (color temperature 8500K) and warm white (color temperature 2700K) LED chips, and can be further integrated with LED chips of specific wavelengths such as pure red (wavelength 660nm), deep blue (wavelength 450nm), or even cyan. This invention, by independently controlling the switching and power of different lighting unit groups 1 or different sub-light-emitting chips 13 within the same lighting unit group 1, can achieve smooth, stepless, continuous color temperature adjustment within the range of 2700K to 8500K, and this color temperature range can be further widened according to design requirements.

[0054] In addition, various narrow-band LED chips such as red, green, blue, amber, and white can be used for mixed light distribution. This not only allows for precise control of the color temperature of the output light, but also enables the simulation of standard natural light spectra such as D55 and D65, and even the generation of specific non-natural spectra to meet the application needs of special treatment scenarios such as phototherapy.

[0055] In one embodiment of the present invention, such as Figure 7 As shown, the light-emitting chip 10 is divided into a four-in-one structure, internally integrating four sub-light-emitting chips 13 whose power can be independently controlled. Figure 8 As shown, the light-emitting chip 10 is divided into a seven-in-one structure, which integrates seven sub-light-emitting chips 13 whose power can be controlled independently.

[0056] In one embodiment of the present invention, such as Figure 6 As shown, the light-emitting chip 10 can also be left undivided, and it integrates a sub-light-emitting chip 13 with independently controllable power. The light-emitting chip 10 can be divided reasonably according to the actual display effect.

[0057] Figure 9 This is a schematic diagram of the image plane (front view) of a multi-group multifunctional lighting source provided by the present invention. Figure 10This is a schematic diagram of the image plane (front view) of another multi-functional lighting source provided by the present invention. Based on the above embodiments, please refer to the figures. Figure 9 and Figure 10 In this embodiment of the invention, all the second aspherical lenses 12 in the multiple illumination unit groups 1 are integrated into a single aspherical lens array; or, all the second aspherical lenses 12 in the multiple illumination unit groups 1 are an array structure fixed by mechanical means. The aspherical components arranged in an array collect and collimate the divergent light emitted from the light-emitting chip 10, achieving a collimation angle of 6° across the entire range.

[0058] As an example, such as Figure 7 As shown, the multifunctional lighting source includes 7 lighting unit groups 1. The light-emitting chip 10 of each lighting unit group 1 is divided into a four-in-one chip, which integrates four sub-light-emitting chips 13 with independently controllable power. These four sub-light-emitting chips 13 are: two cool white sub-light-emitting chips (color temperature 8500K), one warm white sub-light-emitting chip (color temperature 2700K), and one pure red photon light-emitting chip (wavelength 660nm).

[0059] In terms of control strategy, this invention independently controls the switching of different lighting unit groups 1 and the power of different sub-light-emitting chips 13 within the same four-in-one chip, enabling multiple operating modes, such as:

[0060] High-brightness cool white mode: Controls all 7 lighting unit groups 1 to light up the cool white sub-light-emitting chips at rated power, with a color temperature of approximately 8500K;

[0061] High-brightness warm white mode: controls all 7 lighting unit groups 1 to light up the warm white sub-light-emitting chips, with a color temperature of about 2700K;

[0062] Stepless color temperature adjustment mode: The cool white and warm white light-emitting chips are mixed and lit in proportion to achieve continuous adjustment of any color temperature within the range of 2700K~8500K;

[0063] Special spectral modes: Light up pure red photonic light-emitting chips or combine them with other chips to enhance the contrast of specific tissues.

[0064] Furthermore, in order to improve the uniformity of lighting, in this embodiment of the invention, multiple lighting unit groups 1 are arranged in a centrally symmetrical manner with one lighting unit group 1 as the center, and the uniformity of lighting is achieved by controlling the symmetrical switching of multiple lighting unit groups 1.

[0065] Continue to refer to Figures 6-8As shown, to achieve better uniformity, a symmetrical switching method is used. The lighting unit group 1 at the center is the core, and the four lighting unit groups 1 within the dotted circle are grouped together. The four lighting unit groups 1 within the dotted circle are controlled to light up, while the three lighting unit groups 1 outside the dotted circle are controlled to turn off; or, the four lighting unit groups 1 within the dotted circle are controlled to turn off, while the three lighting unit groups 1 outside the dotted circle are controlled to light up. Optical simulation tests (such as...) are performed. Figure 11 and Figure 12 As shown in the figure, after adopting this symmetrical switching strategy, the uniformity of the lighting area reaches 95.3%, which is significantly better than the existing technology.

[0066] The embodiments of the present invention also include a control component (not shown in the figure), which is electrically connected to the lighting unit group. The control component may be a microprocessor, such as a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof, to realize the switching and power control of the lighting unit group.

[0067] The following specific embodiment further illustrates the multifunctional lighting source provided by the present invention. The accompanying drawings and embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0068] Example

[0069] Figure 13 This is a side view of another multifunctional illumination source for a surgical microscope provided by the present invention. The multifunctional illumination source provided in this embodiment of the invention is shown in the reference diagram. Figure 13 The multifunctional lighting source comprises 13 lighting unit groups 1. Each lighting unit group 1 contains a seven-in-one chip 10, which integrates seven sub-light-emitting chips 13, including cool white, warm white, pure red, deep blue (450nm), and cyan chips. By independently controlling the sub-light-emitting chips 13, the spectrum of D55 and D65 standard light sources can be simulated, and it can be used in special treatment scenarios such as phototherapy.

[0070] Alternatively, homogenization can be achieved by optimizing the surface shape of the second aspherical lens 12 and increasing the number of illumination unit groups (13 groups), which can also achieve a good uniform light effect.

[0071] In summary, this invention provides a multifunctional illumination source for surgical microscopes. This source includes multiple illumination unit groups and a focusing optics group. Each illumination unit group consists of a light-emitting chip and a collimating optical assembly. The collimating optical assembly employs a first aspherical lens and a second aspherical lens arranged sequentially along the optical path to collect the diverging light emitted by the light-emitting chip and collimate it into parallel light. The focusing optics group then converges the parallel light to the desired illumination area. The light-emitting chip integrates multiple independently controllable sub-light-emitting chips. By independently controlling the switching and power of different chips, stepless continuous color temperature adjustment within the range of 2700K to 8500K can be achieved. Simultaneously, by setting up a microlens array, adopting a centrally symmetrical arrangement, and a symmetrical switching strategy, the illumination uniformity can be significantly improved (reaching 95.3% in the embodiment). The parallel light collimated by the second aspherical lens has a divergence angle of no more than 6° across the entire angle, and the focal length range of the focusing optics group is 20mm to 50mm. The above-mentioned solution provides a lighting source with high efficiency, high uniformity, and adjustable color temperature, which can effectively solve the technical problems of low luminous efficiency, poor uniformity, and single color temperature in existing surgical microscope lighting sources.

[0072] Based on the same inventive concept, this invention also provides a surgical microscope, including the multifunctional illumination source for the surgical microscope provided in the above embodiments. Therefore, this surgical microscope also possesses the beneficial effects of the multifunctional illumination source in the above embodiments. The similarities can be understood with reference to the explanation of the multifunctional illumination source above, and will not be repeated below.

[0073] In one embodiment of the invention, the emitted light from the multifunctional illumination source can directly enter the large objective lens of the surgical microscope. Figure 14 This is an optical path diagram of a multifunctional illumination source for a surgical microscope provided by the present invention. (See diagram below.) Figure 14 As shown, the illumination light emitted from the multiple illumination units 1 of the multifunctional illumination source is homogenized by a microlens array, then converged and collimated by the focusing optics group 2 before entering the microscope objective lens 5, where it is further collimated and focused onto the microscopic illumination area. The focusing optics group 2 is an aspherical focusing lens, and its parameters, along with those of the microscope objective lens 5, satisfy the following conditions:

[0074] 1) The focal length protection range of the focusing optical group 2 and the microscope large lens is 150mm~350mm. In this embodiment, the focal length of the focusing optical group 2 and the microscope large lens is 200mm.

[0075] 2) The protection range of the working distance behind the microscope lens is 150mm~350mm. In the embodiment of this application, the working distance behind the microscope lens is 190mm.

[0076] Table 3. Specific design parameters of the focusing optics group and the microscope objective.

[0077]

[0078] In this diagram, number 2 is the incident surface of the illumination light from the first focusing lens 21, number 3 is the exit surface of the illumination light from the first focusing lens 21, number 4 is the incident surface of the illumination light from the second focusing lens 22, number 5 is the exit surface of the illumination light from the second focusing lens 22, number 6 is the incident surface of the illumination light from the third focusing lens 23, and number 7 is the exit surface of the illumination light from the third focusing lens 23. Numbers 8, 9, and 10 are cemented large objectives of the surgical microscope, shared by the illumination and imaging systems.

[0079] Thanks to the aforementioned multifunctional illumination source, this surgical microscope provides a highly efficient, highly uniform, and wide color temperature adjustable illumination environment, significantly improving the clarity of the surgical field and tissue resolution.

[0080] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A multifunctional illumination source for a surgical microscope, characterized in that, include Multiple illumination unit groups, each of which includes a light-emitting chip and a collimating optical component: The collimating optical component includes a first aspherical lens and a second aspherical lens arranged sequentially along the light path of the light-emitting chip: the first aspherical lens is used to collect the divergent light emitted by the light-emitting chip; the second aspherical lens is used to collimate the collected light into parallel light. A focusing optical group is positioned in the optical path of the parallel light output from the collimating optical component to converge the parallel light to the desired illumination area.

2. The multifunctional lighting source according to claim 1, characterized in that, The light-emitting chip has n independently controllable sub-light-emitting chips integrated inside; where n≥2, and n is an integer.

3. The multifunctional lighting source according to claim 2, characterized in that, By independently controlling the switching and power of different lighting unit groups or different sub-light-emitting chips within the same lighting unit group, stepless continuous color temperature adjustment within the range of 2700K to 8500K can be achieved.

4. The multifunctional lighting source according to claim 2, characterized in that, When n > 2, at least two of the multiple independently controllable sub-light-emitting chips have different color temperatures and / or wavelengths.

5. The multifunctional lighting source according to claim 1, characterized in that, It also includes a microlens array disposed in the optical path between the second aspherical lens and the focusing optical group, for homogenizing parallel light.

6. The multifunctional lighting source according to claim 1, characterized in that, The focusing optical group includes at least three focusing lenses arranged sequentially along the optical path propagation direction; The focal length of the focusing optical group ranges from 20mm to 50mm, the total length from the first lens surface to the last lens surface ranges from 30mm to 60mm, and the subsequent working distance ranges from 5mm to 40mm.

7. The multifunctional lighting source according to claim 1, characterized in that, All the second aspherical lenses in the plurality of lighting unit groups are integrated into a single aspherical lens array or are array structures fixed by mechanical means.

8. The multifunctional lighting source according to claim 1, characterized in that, Parallel light collimated by the second aspherical lens has a divergence angle of less than or equal to 6° across the entire angle.

9. The multifunctional lighting source according to claim 1, characterized in that, With one of the lighting unit groups as the center, the multiple lighting unit groups are arranged in a centrally symmetrical manner, and the uniformity of illumination is achieved by controlling the symmetrical switching of multiple light-emitting chips.

10. A surgical microscope, characterized in that, Includes the multifunctional illumination source for surgical microscopes as described in any one of claims 1-9.

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