Self-adaptive lighting device for high-speed visual insect motion capture

Abstract

The invention discloses a self-adaptive lighting device for high-speed visual insect motion capture, which adopts an axial laminated integrated structure and comprises a control driving assembly, a multispectral light source assembly and a mixed optical assembly, the control driving assembly is electrically connected with the multispectral light source assembly, the multispectral light source assembly comprises an annular substrate and a plurality of light emitting units arranged on the annular substrate, and the light emitting units are distributed on the annular substrate in a multi-circle concentric ring shape. The red light chips, the green light chips and the blue light chips in the light emitting units are arranged in a staggered mode, the mixed optical assembly is located on a light emitting path of the multispectral light source assembly, and the mixed optical assembly comprises a double-face compound eye light uniformizing device. The contradiction between the high-frame-rate imaging requirement and the biological low-interference requirement is solved, and high-quality uniform illumination is achieved.

Description

Technical Field

[0001] This invention relates to the technical field of optical illumination and high-speed imaging, and specifically to an adaptive illumination device for high-speed visual insect motion capture. Background Technology

[0002] In cutting-edge research fields such as insect behavior, biomimetic aerodynamics, and neuroecology, three-dimensional motion capture technology based on high-speed multi-view vision is a key means to analyze the fine movements and flight mechanisms of insects. In order to clearly capture the high-frequency flapping and rapid displacement details of insect wings, the shooting frame rate of high-speed camera systems usually needs to be set to 1000fps to 5000fps or even higher.

[0003] At such a high frame rate, the exposure time of a single frame image is extremely compressed. According to the principle of light sensitivity, in order to ensure that the image has a sufficient signal-to-noise ratio, sharpness and sufficient depth of field, the lighting system must provide an extremely high light flux density.

[0004] Currently, existing high-speed imaging illumination solutions generally employ high-power halogen lamps, metal halide lamps, or high-power LED arrays for global continuous illumination. However, this high-intensity continuous illumination mode has serious drawbacks when observing active microorganisms, such as insects, specifically in the following aspects: 1. Thermal interference: Traditional high-brightness light sources often emit a large amount of infrared radiation while emitting visible light. When continuously turned on at high power, the temperature of the observed microenvironment will rise rapidly. Insects, as poikilothermic animals, are more sensitive to temperature. Therefore, the active or escape behaviors exhibited by insects may be due to stress response to high temperature rather than the natural behavior expected by the experimental design, leading to distorted research data.

[0005] 2. Behavioral interference: On the one hand, a continuous high-intensity light environment causes persistent nervous stress and physiological pressure on photophobic insects; on the other hand, many insects possess extremely sensitive ultraviolet visual channels used for navigation, foraging, or courtship. Existing general-purpose white LED light sources often contain ultraviolet radiation invisible to the human eye but visible to insects, thus interfering with insects' senses and disrupting their normal communication and navigation mechanisms.

[0006] 3. In terms of optical performance, traditional LED array light sources are usually composed of discrete LED beads arranged simply. The projected light field usually exhibits a Gaussian distribution with an overly bright center and an overly dark edge. As a result, in multi-view vision 3D reconstruction, if an insect moves to the edge of the light spot or the overlapping area of ​​different LEDs, multiple images or drastic changes in brightness are easily generated, which seriously affects the feature extraction accuracy and point cloud reconstruction quality of the image stereo matching algorithm.

[0007] Therefore, there is an irreconcilable contradiction between obtaining high-quality, high-speed images and maintaining the natural state of organisms in existing technologies, and there is an urgent need for an adaptive lighting device for high-speed visual insect motion capture to solve the above problems. Summary of the Invention

[0008] To address the problems existing in the prior art, the present invention provides an adaptive lighting device for high-speed visual insect motion capture, so as to resolve the contradiction between the requirements of high frame rate imaging and the requirements of low biological interference, and achieve high-quality uniform lighting.

[0009] To achieve the above objectives, the present invention employs an adaptive lighting device for high-speed visual insect motion capture. This adaptive lighting device adopts an axially stacked integrated structure and includes a control and drive component, a multispectral light source component, and a hybrid optical component. The control and drive component is electrically connected to the multispectral light source component. The multispectral light source component includes a ring substrate and multiple light-emitting units arranged on the ring substrate. The light-emitting units are distributed in multiple concentric rings on the ring substrate, and the red, green, and blue light chips within each light-emitting unit are arranged in an alternating pattern. The hybrid optical component is located in the light emission path of the multispectral light source component and includes a double-sided compound eye homogenizer.

[0010] As a further optimization of the above scheme, the effective aperture of the double-sided compound eye homogenizer covers the entire light-emitting area of ​​the annular array of light-emitting units, so that the light beam emitted from the edge of the light-emitting unit can completely enter the double-sided compound eye homogenizer.

[0011] As a further optimization of the above scheme, the spacing between the ring-arranged red light chip, green light chip, and blue light chip is smaller than the aperture of a single microlens unit of the double-sided compound eye homogenizer.

[0012] As a further optimization of the above scheme, the light-emitting unit on the annular substrate includes at least three strip-shaped light-emitting channels distributed radially, and the positions of the strip-shaped light-emitting channels are matched with the microlens array arrangement of the double-sided compound eye homogenizer.

[0013] As a further optimization of the above scheme, the strip light-emitting channel is a Y-shaped light-emitting channel with a 120-degree angle.

[0014] As a further optimization of the above scheme, the hybrid optical component also includes a primary optical lens array, in which each primary lens unit is respectively covered outside one of the light-emitting units. The primary optical lens array is configured to collimate the large-angle divergent light emitted by the light-emitting unit into a narrow beam, and the divergence angle of the narrow beam matches the incident numerical aperture of the double-sided compound eye homogenizer.

[0015] As a further optimization of the above scheme, the double-sided compound eye homogenizer includes a first compound eye plate and a second compound eye plate. The first compound eye plate divides the light beam from the activated light-emitting unit on the multispectral light source assembly into multiple sub-beams, and the second compound eye plate superimposes the multiple sub-beams onto the target illumination plane.

[0016] As a further optimization of the above scheme, the red light chip, green light chip, and blue light chip are respectively connected to the independent PWM dimming channel of the control and drive component.

[0017] As a further optimization of the above scheme, the light output device of the hybrid optical component also integrates an infrared cut-off filter, which works in conjunction with the pulse emission mode of the multispectral light source component.

[0018] A high-speed visual insect motion capture lighting control method based on the device described in any of the above technical solutions, wherein the method is achieved through the coordinated cooperation of electronic modulation of a multispectral light source component and optical transformation of a hybrid optical component, and the method includes the following steps: S1, the control drive component receives the exposure synchronization signal and the spatial location information of the insect target from an external high-speed image acquisition device; S2, the control drive component activates a specific luminescent area on the multispectral light source component corresponding to the insect target's orientation according to the spatial position information and forms an asymmetric discrete incident light field; S3, using the double-sided compound eye homogenizer, the asymmetric discrete incident light field generated in step S2 is divided and superimposed on the wavefront, and a local illumination spot is reconstructed in the area where the insect target is located. S4, the control and drive component controls the driving ratio of the red light chip, green light chip and blue light chip in the light-emitting unit according to the type of insect target, and uses a double-sided compound eye homogenizer to spatially mix the three-color beams to output colorless and separated synthetic spectrum illumination.

[0019] S5, in response to the exposure synchronization signal, the control drive component drives the light-emitting units in the specific light-emitting area determined in step S2 to emit light pulses according to the red light chip, green light chip and blue light chip drive ratio determined in step S4. The duration of the light pulse is controlled within the single frame effective exposure time of the high-speed image acquisition device, and the start time of the light pulse is synchronized with the start time of the effective exposure time.

[0020] An adaptive lighting device for high-speed visual insect motion capture according to the present invention has the following beneficial effects: 1. An adaptive lighting device for high-speed visual insect motion capture according to the present invention. The present invention uses a "spatiotemporal compression" lighting paradigm to illuminate only the local area where the insect is located in space and emit light only within the microsecond window of camera exposure in time. Combined with an infrared cutoff filter, while ensuring that the instantaneous illuminance meets the requirements of high-speed imaging, the average illuminance and heat load acting on the insect are reduced by several orders of magnitude, effectively avoiding the impact of photothermal stress on the natural behavior of insects. 2. The present invention provides an adaptive lighting device for high-speed visual insect motion capture. Utilizing the wavefront segmentation and superposition principle of a double-sided compound eye homogenizer, the present invention solves the problem of uneven light spots or ghosting in traditional LED arrays when there are local bright spots. Regardless of whether the Y-shaped channel or other zones are lit, after integration by the compound eye, a smooth light spot with illuminance uniformity better than 1.5:1 can be reconstructed on the target plane, which greatly improves the accuracy of image processing and three-dimensional reconstruction. 3. An adaptive lighting device for high-speed visual insect motion capture according to the present invention, through the close staggered arrangement of red light chip, green light chip and blue light chip and 1 independent PWM control, combined with the spatial color mixing effect of compound eye lens, the present invention can synthesize biological neutral light that avoids the sensitive wavelength of insects, and can also effectively eliminate the color difference at the edge of the light spot, thus ensuring the consistency of visual data. 4. The adaptive lighting device for high-speed visual insect motion capture of the present invention adopts an axially stacked integrated structure, which is small in size and easy to deploy. At the same time, it has flexible control capabilities in three dimensions: space, time and spectrum, to adapt to the capture needs of different kinds of insects and different movement speeds.

[0021] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope as a result, and the embodiments of the present invention include many changes, modifications and equivalents. Attached Figure Description

[0022] Figure 1 A three-dimensional structural diagram of an adaptive lighting device for high-speed visual insect motion capture; Figure 2 This is a three-dimensional structural diagram of the control and drive component in this invention; Figure 3 This is a three-dimensional structural diagram of the multispectral light source component in this invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the hybrid optical layer in this invention; Figure 5 This is a schematic diagram of a typical deployment of the present invention in a multi-view high-speed visual insect motion capture system.

[0023] In the figure: 1. Control and drive assembly; 11. Independent drive channel; 2. Multispectral light source assembly; 21. Ring substrate; 22. Light emission unit; 221. Red light chip; 222. Green light chip; 223. Blue light chip; 224. Strip light emission channel; 3. Hybrid optical assembly; 31. Double-sided compound eye homogenizer; 311. First compound eye plate; 312. Second compound eye plate; 32. Infrared cut-off filter. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of the invention.

[0025] It should be noted that when an element is referred to as "set on" or "provided with" another element, it can be directly on the other element or there may be an intermediate element. When an element is referred to as "connected to" or "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. "Fixed connection" means fixed connection. There are many ways of fixed connection, which are not within the scope of protection of this document. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in the specification herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Please see Figure 1 This embodiment provides an adaptive lighting device for high-speed visual insect motion capture. The device is designed with a compact cylindrical structure, which is convenient for deployment in small biological laboratories or field environments. The device adopts an axially stacked integrated structure, which includes a control drive component 1, a multispectral light source component 2 and a hybrid optical component 3 in sequence from back to front along the optical axis.

[0027] Control drive component 1 is located at the lowest end of the device, such as Figure 2 As shown, the control drive component 1 is equipped with a synchronization signal interface and a multi-channel pulse drive circuit, which is used to receive external synchronization trigger signals and lighting commands containing spatial, spectral and intensity parameters, and generate microsecond-level current pulses that are strictly synchronized with them and whose parameters can be independently programmed.

[0028] As a further supplement to the above scheme, the synchronization signal interface is used to receive the exposure synchronization signal from the image acquisition device or controller, and the multi-channel pulse driving circuit is used to generate a current pulse with controllable parameters that is strictly synchronized with the synchronization signal according to the external instruction, and apply it to the corresponding light-emitting unit 22 respectively.

[0029] As a further supplement to the above scheme, the number of independent driving channels 11 included in the multi-channel pulse driving circuit of the control driving component 1 is not less than the number of light-emitting units 22 in the ring array of light-emitting units 22.

[0030] As a further supplement to the above scheme, the external commands in the control drive component 1 include independent intensity control parameters and pulse width control parameters for each light-emitting unit 22 or the red chip, green chip and blue chip in the light-emitting unit 22, and the multi-channel pulse drive circuit is configured to independently adjust the amplitude and width of the current pulse output to each controlled object.

[0031] As a further supplement to the above scheme, the external instructions in the control drive component 1 include spectral recipe parameters. The control drive component 1 is configured to parse the spectral recipe parameters and control the multi-channel pulse drive circuit to drive the light-emitting chips with different peak wavelengths in the multispectral light source layer in a corresponding proportion.

[0032] As a further supplement to the above scheme, the control drive component 1 also includes a storage unit for pre-storing at least one set of illumination mode parameters, which includes spectral formulas, basic pulse widths and intensity mapping relationships for different observation needs.

[0033] like Figure 3 As shown, the multispectral light source layer includes a ring substrate 21, on which multiple independently addressable and controllable light-emitting units 22 are arranged in an array to form a ring light source array. Each light-emitting unit 22 integrates a semiconductor chip that emits different peak wavelengths, including a red chip, a green chip, and a blue chip.

[0034] As a further supplement to the above scheme, the light-emitting units 22 are arranged on the annular substrate 21 in a multi-ring concentric arrangement.

[0035] As a further supplement to the above scheme, the light-emitting unit 22 in the multispectral light source layer integrates three semiconductor light-emitting chips that emit different peak wavelengths, including chips that emit red light, green light and blue light respectively.

[0036] As a further supplement to the above scheme, the chips of different wavelengths in the light-emitting unit 22 in the multispectral light source layer are arranged closely adjacent to each other on the annular substrate 21 and share the same primary optical lens. They are arranged in an alternating manner on the annular array. At the same time, by designing a modulated and rotatable "Y"-shaped light-emitting channel, light output of different spectral components can be achieved. Furthermore, all light-emitting units 22 can achieve different modes of unified control of the whole area, independent control of the partition, and independent control of a single point through the control and drive component 1.

[0037] As a further supplement to the above scheme, in order to further improve the color uniformity of the illumination spot and eliminate edge color difference, the multispectral light source component 2 adopts a chip arrangement strategy with adjacent different colors. Specifically, on the same concentric ring of the annular substrate 21, any two semiconductor light-emitting chips connected at any physical position are configured to emit wavelengths with different peak values. For example, an alternating cyclic arrangement of red light chip 221-green light chip 222-blue light chip 223 is adopted, or the three-color chips of red light chip 221, green light chip 222, and blue light chip 223 are distributed in a triangular interlocking shape.

[0038] Compared to the traditional layout that centralizes chips of the same color in separate zones, this embodiment enables light sources of different wavelengths to achieve wireless proximity at the physical emission point on a microscopic scale. When these heterochromatic light beams enter the microlens array and double-sided compound eye homogenizer 31 at the back end, these heterochromatic light beams have already undergone preliminary spatial overlap and mixing before entering the double-sided compound eye homogenizer 31. This effectively eliminates the color separation or rainbow effect commonly seen at the edge of the light spot, ensuring that the illumination spot projected onto the insect target has a consistent spectral composition in any tiny area. This, in turn, ensures the true color reproduction of the image captured by the high-speed camera. More importantly, it avoids the unnatural photorepulsive or stress response induced in insects due to the presence of a single wavelength in a local area of ​​the light spot, thereby further ensuring the safety and accuracy of biological observation at the microscopic spectral dimension.

[0039] like Figure 4 As shown, the hybrid optical layer includes a primary optical lens array covering each light-emitting chip and a shared double-sided compound eye homogenizer 31. The double-sided compound eye homogenizer 31 cross-mixes the light beams from different positions of the annular array to form a uniform illumination spot with controllable spatial shape on the target plane.

[0040] As a further supplement to the above scheme, the double-sided compound eye homogenizer 31 is placed in front of the multispectral light source layer. The double-sided compound eye homogenizer 31 is configured to cross-mix the light beam emitted from the array of the ring light-emitting units 22 to form a uniform light spot on the target illumination plane.

[0041] As a further supplement to the above scheme, the double-sided compound eye homogenizer 31 in the hybrid optical layer includes a first compound eye plate 311 and a second compound eye plate 312 arranged in parallel. The side of the first compound eye plate 311 closest to the light source layer is formed with a first microlens array, and the side of the second compound eye plate 312 closest to the target is formed with a second microlens array that corresponds one-to-one with the first microlens array unit.

[0042] As a further supplement to the above scheme, there is an air gap between the first compound eye plate 311 and the second compound eye plate 312 in the hybrid optical layer, thereby forming a parallel light transmission region. The focal length of the first microlens array unit is designed so that the focal plane is located near the light-emitting surface of the light-emitting unit 22 array. The microlens units of the first microlens array and the second microlens array are circular convex lenses, and the unit aperture is not greater than the center distance of adjacent light-emitting units 22 in the annular array of light-emitting units 22.

[0043] As a further supplement to the above scheme, the hybrid optical layer also includes a primary optical lens array disposed between the multispectral light source layer and the double-sided compound eye homogenizer 31. Each primary lens unit in the primary optical lens array corresponds to a light-emitting chip and is used to collimate the light emitted from the light-emitting chip.

[0044] As a further supplement to the above scheme, considering that if the divergence angle is too large, exceeding the receiving capacity of the microlens unit of the double-sided compound eye homogenizer 31, i.e. the incident numerical aperture, the light will hit the outside of the lens unit or adjacent units, causing light energy loss or stray light, therefore, each primary lens unit in the primary optical lens array is respectively covered outside one of the light-emitting units 22. The primary optical lens array is configured to collimate the large-angle divergence light of the light-emitting unit 22 into a narrow beam, and the divergence angle of the narrow beam matches the incident numerical aperture of the double-sided compound eye homogenizer 31.

[0045] As a further supplement to the above scheme, the hybrid optical layer includes an infrared cut-off filter 32 disposed at the front end of the optical path to cut off or attenuate light radiation of a specific wavelength.

[0046] As a further supplement to the above scheme, the design of the double-sided compound eye homogenizer 31 in the hybrid optical layer is such that when only some of the light-emitting units 22 in the annular array of light-emitting units 22 are activated, the light spot formed on the target plane after being homogenized by the double-sided compound eye homogenizer 31 has an illuminance uniformity of no more than 1.5:1. In this embodiment, the illuminance uniformity refers to the ratio of the maximum illuminance to the minimum illuminance.

[0047] like Figure 5As shown, this device, together with the high-speed image acquisition equipment, the synchronous controller, and the host computer software, forms a closed-loop system. The control method of this adaptive lighting device for high-speed visual insect motion capture includes the coordinated operation of electronic modulation of the multispectral light source component 2 and optical transformation of the hybrid optical component 3. The specific steps are as follows: S1, Global Guidance: Specifically, at the start of the experiment, this device first emits light in a low-brightness, uniformly distributed mode, and a high-speed image acquisition device acquires a wide-field-of-view guidance image. S2, Target Localization and Strategy Generation: Specifically, the host computer processes the guide image to identify the pixel location and species of the insect. Further details: Spatial mapping calculates the optimal area to be lit on the annular substrate 21 based on the insect's location, for example, activating only the "Y"-shaped channel branch pointing towards the insect's location.

[0048] Spectral synthesis is performed based on the insect species, such as their sensitivity to ultraviolet and blue light. The host computer generates instructions to turn off the blue light chip 223 and use only the red light chip 221 and the green light chip 222 to mix yellow light in a certain proportion. This yellow light is biologically neutral light to avoid sensory interference. S3, Discrete light field generation: Control drive component 1 drives the selected light-emitting unit 22 according to the above instructions. At this time, an asymmetric, discrete entrance light field is generated in the light source layer.

[0049] S4, Optical Integration and Reconstruction: The aforementioned discrete beams enter the double-sided compound eye homogenizer 31. Utilizing the wavelength division and superposition characteristics of the compound eye, these beams from different angles are uniformly stirred and reconstructed into a local, bright, and uniform illumination spot in the spatial region where the target insect is located.

[0050] S5, Synchronization Pulse Output: The device receives the camera's exposure synchronization signal and generates a high-energy light pulse with the spatial and spectral parameters set above, only during the microsecond window period when the camera shutter is fully open.

[0051] S6, closed-loop tracking: As the insect flies and moves, the above steps S2-S5 are repeated in real time. Utilizing the global overlapping imaging characteristics of the compound eye lens, even if the active area of ​​the light source is switching, such as from the left sector to the right sector, the brightness uniformity of the output light spot will not change abruptly, ensuring flicker suppression and smooth transition of the video image.

[0052] like Figure 5 As shown, in a typical embodiment, four devices of the present invention are arranged around a butterfly and connected to a synchronization controller together with four high-speed acquisition devices. The adaptive lighting device control method for high-speed visual insect motion capture includes the following steps: S1, the system start command is issued through the synchronous controller, and the high-speed image acquisition device and the adaptive lighting device acquire a control signal and generate an image based on the command; S2, Based on the above control signals, generate an image and extract the target object; S3, upload the extracted target object to the control center database, perform target comparison and recognition, and generate control signals and issue commands based on the recognition results; S4, the control signal sending command is sent to the high-speed image acquisition device and the adaptive lighting device, and the two work synchronously based on the adaptive parameters of the command; S5. After each high-speed image acquisition device completes a data acquisition, steps S1 to S4 above are repeated, and the control commands are updated.

[0053] As a further supplement to the above technical solution, the theoretical basis for achieving both high imaging quality and low biological interference in this invention lies in the spatiotemporal compression model, based on the conservation of energy and average illuminance. With instantaneous illuminance The relationship can be represented as: ; in, This is the time compression factor. is the spatial compression factor.

[0054] In a typical application scenario of this embodiment: Instantaneous Illuminance The instantaneous illuminance is the luminous flux received per unit area at the target point. The unit is LUX (lm / m 2 ).

[0055] ; Time compression factor Defined as: ; in, The camera frame period, taking 5000fps as an example. ; The pulse width, considering the exposure time during high-speed image acquisition, can be set to 10-30. Preferably, in this embodiment .

[0056] but .

[0057] Space compressibility coefficient Defined as: ; in, In this embodiment, the projected area of ​​the insect target is... Let be the projected area of ​​the butterfly's body. .

[0058] Should The total area of ​​the experimental scene is, in this embodiment, the minimum area of ​​the system's default uniform lighting. .

[0059] In this embodiment, the insect and the required lighting area are achieved by controlling the driving component 1 to drive only the portion of the light-emitting units 22 corresponding to the insect's position to emit light. .

[0060] This means that light energy is only concentrated in 1% of the space area.

[0061] Comprehensive calculation, average illuminance attenuation factor Defined as: ; therefore, When the device emits a strong light with an instantaneous brightness of up to 100,000 lux to meet the microsecond-level exposure requirements, the average photothermal load acting on the insect is only equivalent to 100 lux of continuous light. This value is far below the threshold at which most insects will produce a stress response, thus enabling high-definition shooting without disturbing the insects. With the combined effect of time and space compression, the average demand for light energy is theoretically reduced to one-thousandth of that of uniform continuous illumination.

[0062] To verify the robustness and design rationality of the model, this embodiment further performs reverse verification: First, based on biological experience, it is determined that insects experience less photothermal impact at an average illuminance of 800 lux, i.e., the target control parameter is... Calculate the required instantaneous illuminance capacity: ; Calculation results show that, under the premise of meeting biosafety requirements, this system can theoretically generate an instantaneous illuminance of up to 800,000 lux. This value far exceeds the exposure target of 100,000 lux typically required in high-speed photography scenarios, meaning that the theoretical model has huge design redundancy, even considering optical efficiency losses in practical engineering. Due to practical factors such as incomplete beam overlap loss, etc., to achieve At the same time maintain It is entirely feasible in terms of physical principles.

[0063] To further ensure biosafety from a spectral perspective, this embodiment features a targeted design for the optical path and light source, as theoretically verified below: Physiological basis: Existing research on insect visual physiology shows that the photosensitive curves of almost all insects show that they are extremely sensitive to ultraviolet light (UV, about 350-400nm). This band is crucial for insects' intraspecific recognition, navigation, courtship and other behaviors. Meanwhile, infrared light (IR) is the main source of thermal effects.

[0064] As a further supplement to the above scheme, this device integrates an infrared cut-off filter (such as a 750nm long-pass filter) at the end of the optical path of the hybrid optical component 3 to physically block infrared radiation.

[0065] As a further supplement to the above solution, the LED selection and control logic does not include or actively shuts down ultraviolet LED chips (peak wavelength <400nm), thus eliminating the generation of the two interfering wavelengths of ultraviolet (UV) and infrared (IR) from the light source hardware.

[0066] As a further supplement to the above scheme, the control drive component 1 uses a built-in or received spectral control algorithm to drive the red light chip 221 and the green light chip 222 in a specific ratio using PWM dimming technology, thereby adjusting the visible light ratio to the "neutral region" (such as synthesized yellow light) that minimizes the stimulation to insects, thus theoretically cutting off the main optical behavior interference pathway.

[0067] Furthermore, in this embodiment, the physical mechanism by which the dual-sided compound eye homogenizer 31 achieves high uniformity illumination can be divided into three steps: light source segmentation, cross-mixing, and image plane sufficiency.

[0068] Light source segmentation: the first compound eye plate 311 images the light-emitting surface of the entire LED array onto the vicinity of its own focal plane, and divides the originally broad light energy into countless tiny "beam units".

[0069] The beams are interleaved and mixed. These beam units propagate and intersect in the parallel optical path between the first compound eye plate 311 and the second compound eye plate 312. The light from any one LED is not directed in only one direction, but is collected by multiple primary lens units of the first compound eye plate 311 and distributed to multiple corresponding units of the second compound eye plate 312.

[0070] Each primary lens unit of the second compound eye plate 312 refocuses the mixed light received by the second compound eye plate 312 from multiple different LEDs and projects it onto the target illumination surface. Therefore, the light intensity at any point P on the target surface is actually the integral (sum) of the light intensity that can reach point P after the light beams from multiple or even all of the activated LEDs in the ring array pass through the optical path from the specific unit of the first compound eye plate 311 to the corresponding unit of the second compound eye plate 312.

[0071] Due to these cross-mixing mechanisms, the Gaussian distribution brightness of a single LED is broken down and evenly distributed across the entire target area. Even if only a few LEDs are lit, the energy is redistributed by the compound eye structure, thus forming a smooth light spot with continuously varying brightness on the target surface, rather than a discrete light spot.

[0072] As a further supplement to the above scheme, assuming the target illumination surface is planar, each eyelet of the primary lens unit is considered as an optical channel, and the illuminance distribution formed by a single LED on the target surface is as follows: Typically exhibiting a Gaussian or Lambertian distribution, it shows significant attenuation with a bright center and dark edges. The function of the double-sided compound eye homogenizer 31 can be mathematically approximated as forming N illuminance distribution maps on the target surface using N LEDs. Perform convolution or weighted average.

[0073] Illumination distribution of the final target surface Under ideal uniform mixing, the result is an arithmetic mean. For an ideal point light source, a single... The uniformity is very poor, with the center-to-edge ratio potentially greater than 10:1. However, after incoherent superposition of N distribution maps, because the centers (brightest points) of each distribution map are spatially offset, the sum of the distributions... The undulations will be greatly smoothed out.

[0074] Theoretical calculations can prove that when N is sufficiently large and the compound eye unit design is reasonable, The ratio of the maximum to the minimum value can be easily suppressed to within 1.5:1.

[0075] In summary, the adaptive lighting device for insect motion capture according to the present invention has the following significant advantages compared with the prior art: By changing the lighting mode from "continuous global" to "instantaneous local pulse", the average illuminance and heat radiation received by insects can be reduced by 1-2 orders of magnitude, maximizing the protection of the natural behavior of insects and greatly alleviating the contradictions in the core research.

[0076] This invention uses specific light-emitting units 22 in an electronic ring array to dynamically control the size and shape of the illumination spot without mechanical movement. At the same time, by independently controlling the intensity ratio of each color light chip, the target spectrum can be accurately synthesized, and ultraviolet light that is sensitive to insects and infrared light that generates heat can be actively filtered out. The pulse width and intensity can be independently adjusted to optimally match the target movement speed and imaging requirements.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adaptive lighting device for high-speed visual insect motion capture, characterized in that, The adaptive lighting device adopts an axially stacked integrated structure. The adaptive lighting device includes a control and drive component, a multispectral light source component, and a hybrid optical component. The control and drive component is electrically connected to the multispectral light source component. The multispectral light source component includes a ring substrate and multiple light-emitting units arranged on the ring substrate. The light-emitting units are distributed in multiple concentric rings on the ring substrate, and the red light chip, green light chip, and blue light chip in the light-emitting unit are arranged in an alternating manner. The hybrid optical component is located in the light output path of the multispectral light source component and includes a double-sided compound eye homogenizer.

2. The adaptive lighting device for high-speed visual insect motion capture according to claim 1, characterized in that: The effective aperture of the double-sided compound eye homogenizer covers the entire light-emitting area of ​​the annular array of light-emitting units, so that the light beam emitted from the edge of the light-emitting unit can completely enter the double-sided compound eye homogenizer.

3. The adaptive lighting device for high-speed visual insect motion capture according to claim 2, characterized in that: The spacing between the ring-shaped red light chip, green light chip, and blue light chip is smaller than the aperture of a single microlens unit of the double-sided compound eye homogenizer.

4. An adaptive lighting device for high-speed visual insect motion capture according to claim 3, characterized in that: The light-emitting unit on the annular substrate includes at least three strip-shaped light-emitting channels distributed radially, and the positions of the strip-shaped light-emitting channels are matched with the microlens array arrangement of the double-sided compound eye homogenizer.

5. An adaptive lighting device for high-speed visual insect motion capture according to claim 4, characterized in that: The strip-shaped light-emitting channel is a Y-shaped light-emitting channel with a 120-degree angle.

6. An adaptive lighting device for high-speed visual insect motion capture according to claim 5, characterized in that: The hybrid optical component further includes a primary optical lens array, in which each primary lens unit is respectively disposed outside one of the light-emitting units. The primary optical lens array is configured to collimate the large-angle divergent light emitted by the light-emitting unit into a narrow beam, and the divergence angle of the narrow beam matches the incident numerical aperture of the double-sided compound eye homogenizer.

7. An adaptive lighting device for high-speed visual insect motion capture according to claim 6, characterized in that: The double-sided compound eye homogenizer includes a first compound eye plate and a second compound eye plate. The first compound eye plate divides the light beam from the activated light-emitting unit on the multispectral light source assembly into multiple sub-beams, and the second compound eye plate superimposes the multiple sub-beams onto the target illumination plane.

8. An adaptive lighting device for high-speed visual insect motion capture according to claim 7, characterized in that: The red light chip, green light chip, and blue light chip are respectively connected to the independent PWM dimming channel of the control and drive component.

9. An adaptive lighting device for high-speed visual insect motion capture according to claim 8, characterized in that: The light-emitting part of the hybrid optical component also integrates an infrared cut-off filter, which works in conjunction with the pulse emission mode of the multispectral light source component.

10. A high-speed visual insect motion capture lighting control method based on the device according to any one of claims 1-7, characterized in that, The method is achieved through the coordinated use of electronic modulation of a multispectral light source component and optical transformation of a hybrid optical component, and includes the following steps: S1, the control drive component receives the exposure synchronization signal and the spatial location information of the insect target from an external high-speed image acquisition device; S2, the control drive component activates a specific luminescent area on the multispectral light source component corresponding to the insect target's orientation according to the spatial position information and forms an asymmetric discrete incident light field; S3, using the double-sided compound eye homogenizer, the asymmetric discrete incident light field generated in step S2 is divided and superimposed on the wavefront, and a local illumination spot is reconstructed in the area where the insect target is located. S4, the control and drive component controls the driving ratio of the red light chip, green light chip and blue light chip in the activated light-emitting unit according to the type of insect target, and uses a double-sided compound eye homogenizer to spatially mix the three-color beams to output colorless and separated synthetic spectrum illumination. S5, in response to the exposure synchronization signal, the control drive component drives the light-emitting units in the specific light-emitting area determined in step S2 to emit light pulses according to the red light chip, green light chip and blue light chip drive ratio determined in step S4. The duration of the light pulse is controlled within the single frame effective exposure time of the high-speed image acquisition device, and the start time of the light pulse is synchronized with the start time of the effective exposure time.

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