Transmission-type rotating wheel modulated single-pixel imaging device and imaging method thereof
The transmissive rotary modulation device solves the problems of hardware storage burden and low light energy utilization efficiency of existing single-pixel imaging devices by setting a bar-coded mask on the rotary wheel and using a modular design, thus achieving efficient wide-band imaging and high-speed real-time imaging capabilities.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-11
- Publication Date
- 2026-04-07
AI Technical Summary
Existing single-pixel imaging devices require a complete update when switching modulation modes, resulting in a heavy hardware storage burden, difficulty in improving frame rates, low light energy utilization efficiency, insufficient system compactness and signal-to-noise ratio, making it difficult to meet the needs of high-speed and real-time imaging.
A transmissive rotary modulation device is used, which performs optical encoding by setting a barcode mask on the rotary wheel. Combined with modular design and signal processing unit, signal acquisition and processing are performed using fiber collimator and photodetector to achieve image reconstruction.
It improves light energy utilization, simplifies the system optical path, adapts to wide-band imaging, enhances signal acquisition efficiency and signal-to-noise ratio, and supports high-speed stable operation and real-time imaging.
Smart Images
Figure CN121806286A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of optical imaging and computational imaging, in particular to the field of mechanical spatial modulation in single-pixel imaging systems. BACKGROUND
[0002] Single-pixel imaging breaks the simple imaging mode of "what you see is what you get" in traditional imaging, and through optical coding of the illumination and imaging system, only one pixel detector is used to reconstruct the target scene, which has the characteristics of wide waveband, high resolution and sensitivity. Moreover, in the imaging waveband of terahertz, X-ray, infrared light and other traditional imaging, it has a cost advantage that ordinary cameras cannot match. Therefore, single-pixel imaging has a wide application prospect.
[0003] At present, the mainstream single-pixel modulator mainly includes liquid crystal spatial light modulator (LC SLM) and digital micro-mirror device (DMD). When these devices switch the modulation mode, the spatial modulation distribution usually needs to be updated as a whole to generate a new modulation mode, thereby bringing a large scale of mode data, significantly increasing the storage burden of the modulator hardware, and limiting the ability to achieve high-resolution imaging under full sampling conditions. At the same time, due to the refresh speed of the circuit hardware, the frame rate of the imaging system is difficult to further improve, which makes single-pixel imaging face great challenges in dynamic scene or real-time imaging applications. In order to improve the speed, mechanical modulation strategies have been proposed, including rotating disk, spool and wheel type reflection modulation. However, the rotating disk needs to convert the pattern from Cartesian coordinates to polar coordinates, which is difficult to process, cannot be reused and causes image distortion; the transmission structure of the spool type is complex, and the mechanical strength of the mask is tested; and the wheel type reflection modulation has strict requirements on the incident angle, the system compactness is poor, and the absorption and diffuse reflection of light also reduce the light energy utilization efficiency, which affects the signal-to-noise ratio of the system. SUMMARY
[0004] The technical problem to be solved by the present application is how to provide a mechanical modulation device and method with simple structure, high light energy utilization rate, easy engineering implementation, wide waveband adaptation and convenient high-speed stable operation.
[0005] The technical solution adopted in this invention is: a single-pixel imaging device with transmissive rotating wheel modulation, the single-pixel imaging device includes an imaging lens (7), a transmissive rotating wheel (3), a signal receiving device and a signal processing unit (9). The transmissive rotating wheel (3) is provided with at least one bar-coded mask with a marker bit. Each bar code is composed of coding units arranged in a predetermined order. The coding unit is a light-transmitting area or a light-blocking area for spatial modulation of light waves. The bar-coded mask periodically modulates the light of the target scene transmitted into the modulation window through the modulation window on the transmissive rotating wheel (3). The signal receiving device receives the light modulated by the transmissive rotating wheel (3) and transmits the adjusted light signal to the signal processing unit (9). The signal processing unit (9) adjusts the transmissive rotating wheel (3) using the received light signal, the bar code timing, and the rotating wheel speed. Then, it synchronizes and reconstructs the image using the received light signal, the bar code timing, and the modulated rotating wheel speed.
[0006] The transmission wheel (3) is detachably mounted on the turntable (2). The turntable (2) is mounted on the output shaft of the drive motor through the rotating hole (1). The drive motor is electrically connected to the signal processing unit (9). The signal processing unit (9) controls the drive motor to adjust the speed, thereby controlling the transmission wheel (3) to adjust the speed.
[0007] The transmissive rotating wheel (3) is a rotating wheel made of light-transmitting material. The bar-coded mask includes a mask that is fixed to the transmissive rotating wheel (3) by plating, gluing or detaching. When the mask is a transparent material, an opaque material is pasted on the mask to form a bar-coded mask. When the mask is an opaque material, holes are punched on the mask to form a bar-coded mask.
[0008] The signal receiving device includes an optical fiber collimator (10) and an optical fiber transmission assembly (11). The optical fiber collimator (10) receives the modulated optical signal and then transmits the optical signal to the signal processing unit (9) through the optical fiber transmission assembly (11).
[0009] The signal receiving device includes a reflector (12) and a photodetector (13). The reflector (12) reflects the modulated light signal onto the photodetector (13). After receiving the signal, the photodetector (13) transmits the light signal to the signal processing unit (9).
[0010] The single-pixel imaging device also includes a periodic synchronization device, which includes a fully opaque photoelectric trigger and / or an angle encoder in a flag position.
[0011] The single-pixel imaging device also includes a sensor for detecting the rotational speed of the transmissive wheel (3) in connection with the signal processing unit (9).
[0012] An imaging method for a single-pixel imaging device using a transmissive rotating wheel modulation: light emitted from a light source (5) illuminates the imaging target (6) to form a light wave carrying target information. The light wave carrying target information is coupled to the transmissive rotating wheel (3) through an imaging lens (7). The bar-coded mask on the transmissive rotating wheel (3) periodically passes through the modulation window on the transmissive rotating wheel (3) to spatially modulate the light signal of the target scene. The modulated light signal is received by a signal processing unit (9). The signal processing unit (9) uses the received light signal and the acquired bar-coded timing and rotating wheel speed information to adjust the rotation speed of the transmissive rotating wheel (3). After adjusting to the optimal position, the signal processing unit (9) uses the received light signal, bar-coded timing, and modulated rotating wheel speed to synchronize and reconstruct the image.
[0013] The image reconstruction is performed by one or more of the following methods: linear inversion of full sampling measurement, linear inversion of sampling after necessary preprocessing and completion, and iterative optimization of sparse prior reconstruction method. The signal receiving device performs pre-amplification, bandpass / lowpass filtering and phase-locked amplification on the signal to improve the signal-to-noise ratio.
[0014] The barcode mask is a modular strip that automatically reads and loads the corresponding reconstruction parameters, inverse operators, and calibration files during loading via QR codes or RFID tags on the strip.
[0015] The beneficial effects of this invention are as follows: By setting a bar-coded mask on a transmissive rotating wheel to modulate the target light, and in conjunction with a modular bar-coded mask design, the light energy utilization efficiency is significantly improved and the system optical path is simplified, giving the device good adaptability across a wide wavelength range from visible light to mid- and far-infrared. The mask (bar-coded mask) supports various manufacturing processes such as printing, laser drilling, photolithography / metallization, and can be embedded with QR codes or RFID for automatic identification and rapid loading, greatly improving engineering maintainability and reusability. Flexible signal access schemes and matching collimation / coupling structures improve signal acquisition efficiency and reduce... With less stray light interference, the SNR can be significantly improved by combining hardware methods such as front-end amplification, filtering, and lock-in amplification. The synchronization scheme based on the full-shield flag and angle encoder, as well as the strategy of pre-computing and caching the inverse operator at the processing end and offloading the parallel task to the FPGA / GPU, ensures accurate synchronization, fast mapping, and real-time or near-real-time reconstruction capabilities under high-speed rotation conditions. In addition, this invention provides engineering-grade software management and standardized calibration procedures, runtime parameter monitoring and anomaly protection, which further enhances the practical value and industrial adaptability of the device from the perspectives of system reliability, maintenance convenience, and large-scale deployment. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the turntable structure of the present invention; Figure 2 yes Figure 1 AA diagram; Figure 3 This is a three-dimensional schematic diagram of the transmission-type rotating wheel of the present invention; Figure 4 This is a schematic diagram of one implementation of the overall structure of the present invention; Figure 5 The difference in the overall structure of this invention is... Figure 4 A diagram illustrating another implementation method; Figure 6 This is a schematic diagram of the system workflow of the present invention; Among them, 1. Rotary hole, 2. Turntable, 3. Transmission wheel, 4. Screw, 5. Light source, 6. Imaging target, 7. Imaging lens, 8. Drive motor, 9. Signal processing unit, 10. Fiber collimator, 11. Fiber optic transmission assembly, 12. Reflector, 13. Photodetector. Detailed Implementation
[0017] like Figures 1-6 As shown, a single-pixel imaging device with transmissive rotary modulation includes an imaging lens 7, a transmissive rotary wheel 3, a signal receiving device, and a signal processing unit 9. The transmissive rotary wheel 3 has at least one bar-coded mask, each bar-coded mask consisting of coding units arranged in a predetermined order. Each coding unit is a light-transmitting or light-blocking area that spatially modulates light waves. The bar-coded mask periodically modulates the light signal of the target scene through a modulation window on the transmissive rotary wheel 3. The signal receiving device receives the light signal modulated by the transmissive rotary wheel 3 and transmits the adjusted light signal to the signal processing unit 9. The signal processing unit 9 adjusts the transmissive rotary wheel 3 using the received light signal, the bar-coded timing, and the rotary wheel speed. Then, it synchronizes and reconstructs the image using the received light signal, the bar-coded timing, and the modulated rotary wheel speed.
[0018] The transmissive rotating wheel 3 is made of a broadband light-transmitting substrate and is annular (cylindrical) in shape, which can be fixed to the turntable 2 with bolts. One side of the transmissive rotating wheel 3 is fixedly connected to the turntable 2, so that the transmissive rotating wheel 3 rotates synchronously when the turntable 2 rotates. The circumference (inner or outer surface) of the other side of the transmissive rotating wheel 3 is used to install a barcode mask. The barcode mask is fixed to the transmissive rotating wheel 3 by plating, gluing, or detachable means. When the mask is a transparent material, an opaque material is glued onto the mask to form a barcode mask; when the mask is an opaque material, holes are punched in the mask to form a barcode mask.
[0019] The mask can be implemented in one of the following ways: The mask can be made of a flexible material that is transparent to a wide wavelength range, and a black and white (here, white refers to blank areas that allow light to pass through) binary pattern is formed on its surface by printing. The unprinted areas remain transparent, representing the code value "1", and the printed black areas represent the code value "0". This implementation method is simple and suitable for rapid manufacturing and replacement of visible and special wavelengths (referring to any required wavelength).
[0020] The mask can also be made of opaque flexible material and light-transmitting holes can be formed by mechanical drilling or laser micromachining to form a binary pattern, wherein the drilled area represents the coded value "1" and the undrilled area represents the coded value "0". This implementation method is suitable for wide-band scenarios and can obtain better consistency and long-term stability. The rotating wheel provides mechanical support for the mask.
[0021] Outside the coded modulation area (binary pattern), one or more fully shaded areas, i.e., marker areas, are set along the circumference to mark the beginning and end of the complete modulation cycle. This facilitates cycle synchronization and signal segmentation at the acquisition end, thereby ensuring the accuracy of data segmentation.
[0022] The mask can be spliced together from multiple encoding cycles and a corresponding number of flag bits. Each time the motor rotates 360 degrees, multiple modulations are completed to further improve the modulation speed.
[0023] The transmissive rotary mask is detachable and replaceable, allowing for the replacement of different coding strips according to imaging resolution, sampling rate, or band requirements, thus achieving device reusability and engineering maintainability.
[0024] The transmission-type rotating wheel 3 is detachably mounted on the turntable 2. The turntable 2 is mounted on the output shaft of the drive motor through the rotating hole 1. The drive motor is electrically connected to the signal processing unit 9. The signal processing unit 9 controls the drive motor to adjust the speed, thereby controlling the transmission-type rotating wheel 3 to adjust the speed.
[0025] The drive motor is a servo motor or a brushless DC motor. The motor can provide a constant and adjustable high angular velocity, preferably not less than 100 rpm. The speed can be adjusted according to the material and mechanical strength. The shaft can be installed horizontally or vertically. The material is preferably lightweight and high-strength to reduce rotational inertia and improve mechanical stability.
[0026] The manufacturing methods of the coded mask include, but are not limited to: forming a binary or grayscale pattern on a flexible substrate that is transparent to a wide wavelength using digital printing or screen printing.
[0027] A light-transmitting aperture array is formed on an opaque thin sheet using laser micro-hole processing or mechanical micro-hole processing; high-precision patterns are formed on metal or semiconductor substrates using photolithography, chemical etching, or metallization processes. The elongated coded pattern consists of a coded area and flag bits. The coded area can be divided into n sub-coded patterns of size a×b. In one embodiment, n=10403, where n, a, and b are natural numbers chosen according to the actual situation. Taking the magnified portion in the figure as an example, adjacent sub-coded patterns differ by only one column of pixels on each side, but their spatial correlation is extremely low, so that each sub-coded pattern can complete an independent spatial encoding in single-pixel imaging. The sub-coded pattern is switched by generating relative displacement between the rotating wheel and the target scene. The starting position of each cycle is identified by the flag bits.
[0028] The surface of the coded mask can be treated with anti-reflective, wear-resistant, or temperature-resistant methods to adapt to different wavebands and operating conditions.
[0029] The coded strip can have identification information printed or embedded on it, such as a QR code or RFID chip. The identification information is used to automatically read the strip ID and load the corresponding acquisition mapping table, inverse operator and calibration file when the strip is loaded, thereby realizing automated configuration and fast switching.
[0030] The coding strip may have a reserved full-light-blocking marker or optical identifier at one of its positions for periodic start detection or system synchronization.
[0031] A single-pixel imaging device based on transmissive rotary modulation includes two types.
[0032] like Figure 4 As shown, a single-pixel imaging device with transmissive rotary modulation includes an imaging lens 7, a transmissive rotary wheel 3, a signal receiving device, and a signal processing unit 9. The signal receiving device consists of an optical fiber collimator 10 and an optical fiber transmission assembly 11.
[0033] The fiber optic transmission component 11 is implemented by extending a single-mode or multi-mode fiber optic probe into the transmission wheel 3 via a support rod or adapter mechanism. The front end of the fiber optic transmission component 11 is equipped with a pigtail and a fiber collimator 10 to efficiently couple the beam transmitted from the transmission wheel 3 into the fiber or convert the light inside the fiber into collimated light. The beneficial effects of doing so include reducing external stray light interference, shortening the optical path, improving coupling efficiency and system compactness.
[0034] like Figure 5 As shown, a single-pixel imaging device with transmissive rotating wheel modulation is disclosed. The single-pixel imaging device includes an imaging lens 7, a transmissive rotating wheel 3, a signal receiving device, and a signal processing unit 9. The signal receiving device consists of a reflector 12 and a photodetector 13.
[0035] A detection mark, such as a full-light-blocking mark or an encoder, is set at the assembly position of the transmissive rotary wheel 3 to generate a synchronous trigger signal related to the rotation angle. The signal processing unit 9 then performs periodic segmentation and alignment of the barrel signal accordingly.
[0036] To meet different resolution or field of view requirements, the coding strip is designed as a detachable module, and coding strips with different downsampling rates and resolutions can be replaced as needed; the material and process of the coding strip can be digital printing or metal punching / laser processing.
[0037] The fiber optic transmission assembly 11 is equipped with a collimator or self-focusing lens at the fiber end and the probe port to improve coupling efficiency and reduce alignment tolerance.
[0038] Circuits such as preamplifier, bandpass / lowpass filter, and lock-in amplifier can be set in the analog link of the signal receiving device to improve the system signal-to-noise ratio and enhance the detection capability of weak signals.
[0039] Synchronization schemes can employ a fully opaque flag in conjunction with a photoelectric trigger to achieve periodic triggering, or use a shaft angle encoder (grating or Hall effect sensor) to acquire continuous angle information, or a combination of both to improve the accuracy of angle-mode correspondence. Time deviation compensation is implemented for rotational speed fluctuations within the signal processing unit. By setting k encoding cycles on the same encoding pattern, k cycle modulations can be achieved through a single 360-degree rotation, increasing the modulation speed by a factor of k. The fully opaque flag corresponds to a trough position on the electrical signal, identifying the start and end of each cycle.
[0040] The signal processing unit can pre-calculate and cache commonly used reconstruction inverse operators or acceleration matrices during the system initialization phase, and can offload computationally intensive parallel tasks to FPGA, GPU or embedded DSP to meet the needs of real-time or near-real-time reconstruction.
[0041] The signal processing unit includes a stripe recognition module, a reconstruction parameter database, a pre-calculated inverse operator cache, and a real-time processing module, such as... Figure 6 As shown, it includes sampling segmentation, index mapping, preprocessing, reconstruction and display / storage, as well as user interface and logging functions.
[0042] After the strip (mask) is loaded or replaced, the system automatically reads the strip identification information and loads the corresponding parameters, while performing a short self-test, including optical coupling efficiency detection and trigger synchronization detection, to ensure that the system is ready to use upon power-up.
[0043] It provides a standardized calibration process, including geometric alignment calibration, which adjusts the optical center and modulation window to align using a target or point light source and records the calibration coefficients; time synchronization calibration, which measures rotational jitter and trigger delay and applies time compensation; and coupling efficiency and photometric / temperature calibration, which measures using a reference light source or standard temperature source and generates normalized coefficients.
[0044] During operation, key parameters, including rotational speed, vibration amplitude, and coupling efficiency, are monitored in real time, and warnings or automatic shutdowns are triggered when preset thresholds are exceeded to protect equipment and personnel safety. Furthermore, the software supports remote upgrades, parameter version management, and centralized deployment management for large-scale engineering applications.
[0045] In one embodiment, a receiving method using printed transmissive coding strips coupled with optical fibers is employed. The transmissive rotating wheel 3 is a lightweight, transparent structure with a diameter of approximately 80–150 mm, and its outer edge is machined with several standardized strip slots. The coding strip uses PET or PI film as the substrate, and a binary or grayscale pattern is prepared by digital printing; the printed black areas are blocked (coded "0"), and the unprinted or white areas are transparent (coded "1"). The size of the coding unit depends on the optical system design, and examples are 25 μm, 50 μm, or 100 μm. The coding strip is engaged with a positioning pin through positioning holes and fixed by a micro-clamp to ensure repeatability and positioning accuracy during high-speed rotation.
[0046] The optical path is as follows: the target object is imaged onto the rotary encoder area by an imaging lens, and the transmitted light is received by the fiber optic probe at the modulation window. A miniature collimator or self-focusing lens is equipped at one end of the fiber optic cable to improve coupling efficiency; the fiber type is selected based on the operating wavelength. The other end of the fiber is connected to a fiber optic collimator (e.g., silicon photodiode, InGaAs, or HgCdTe) adapted to the wavelength band. The detector output is pre-amplified with low noise, filtered, and then sent to a high-speed A / D converter.
[0047] The synchronization scheme employs a fully opaque flag on the strip in conjunction with a photoelectric trigger or a shaft angle encoder (grating encoder or Hall encoder). The signal processing unit performs preprocessing (background removal, filtering, gain normalization) and reconstruction after dividing the continuously sampled bucket signal into coded pattern sequences based on trigger or angle information in each cycle. Commonly used inverse reconstruction operators are pre-calculated and cached during system initialization to support real-time reconstruction.
[0048] In one embodiment, to adapt to mid-to-far infrared or high-temperature working environments, a perforated metal mask is used, with reflection guidance implemented inside the rotating wheel. The mask is made of stainless steel or coated metal sheet, and is formed into a hole array through laser micro-perforation or precision machining. The hole diameter and hole spacing are designed according to the target resolution. The mask is fixed to the rotating wheel slot by a clamping structure, which has positioning bosses to ensure assembly repeatability.
[0049] To guide the transmitted light, several directional mirrors are placed inside the transmission wheel 3 as designed. When light passes through the mask aperture, it is directionally reflected by the mirrors and converged to a central or lateral convergence port. The light is then coupled through a window or small lens to a fixed detector or short-distance optical fiber inside the chassis. This structure simplifies the external optical path and is suitable for integrating detectors and front-end electronics within a chassis or confined space. This embodiment requires coupling efficiency calibration after installation. The transfer function is measured using a standard light source to generate correction coefficients, which are used for signal normalization during subsequent operation.
[0050] In one embodiment, a modular and automated management of strips is employed. The strip module is a pluggable strip unit, with a QR code printed on it or an RFID chip embedded to record the strip ID, pixel size, manufacturing batch, and corresponding reconstruction parameter index. After the strip unit is loaded, the system automatically reads the identification information and loads the corresponding acquisition mapping table, inverse operator, and calibration data from a local library or remote server. A short self-test is then performed to verify optical coupling and trigger synchronization. The system provides engineered processes such as geometric alignment, time synchronization calibration, coupling efficiency, and photometric / temperature calibration, and records the calibration results as calibration files at the strip or system level.
[0051] The parameters, materials, processes, and procedures involved in the above embodiments are only illustrative examples. Those skilled in the art can make appropriate adjustments to the parameter range, mask material, driving method, and reconstruction strategy according to specific applications and engineering conditions. All such equivalent transformations or improvements fall within the protection scope of this invention.
Claims
1. A single-pixel imaging device with transmissive rotary modulation, characterized in that: The single-pixel imaging device includes an imaging lens (7), a transmissive rotating wheel (3), a signal receiving device, and a signal processing unit (9). The transmissive rotating wheel (3) is provided with at least one bar-coded mask with a marker. Each bar code is composed of coding units arranged in a predetermined order. The coding unit is a light-transmitting area or a light-blocking area that spatially modulates light waves. The bar-coded mask periodically spatially modulates the light of the target scene transmitted into the modulation window through the modulation window on the transmissive rotating wheel (3). The signal receiving device receives the light modulated by the transmissive rotating wheel (3) and transmits the adjusted light signal to the signal processing unit (9). The signal processing unit (9) adjusts the transmissive rotating wheel (3) using the received light signal, the bar code timing, and the rotating wheel speed. Then, it synchronizes and reconstructs the image using the received light signal, the bar code timing, and the modulated rotating wheel speed.
2. The single-pixel imaging device with transmissive rotary modulation according to claim 1, characterized in that: The transmission wheel (3) is detachably mounted on the turntable (2). The turntable (2) is mounted on the output shaft of the drive motor through the rotating hole (1). The drive motor is electrically connected to the signal processing unit (9). The signal processing unit (9) controls the drive motor to adjust the speed, thereby controlling the transmission wheel (3) to adjust the speed.
3. The single-pixel imaging device with transmissive rotary modulation according to claim 1, characterized in that: The transmissive rotating wheel (3) is a rotating wheel made of light-transmitting material. The bar-coded mask includes a mask that is fixed to the transmissive rotating wheel (3) by plating, gluing or detaching. When the mask is a transparent material, an opaque material is pasted on the mask to form a bar-coded mask. When the mask is an opaque material, holes are punched on the mask to form a bar-coded mask.
4. A single-pixel imaging device with transmissive rotary modulation according to claim 1, characterized in that: The signal receiving device includes an optical fiber collimator (10) and an optical fiber transmission assembly (11). The optical fiber collimator (10) receives the modulated optical signal and then transmits the optical signal to the signal processing unit (9) through the optical fiber transmission assembly (11).
5. A single-pixel imaging device with transmissive rotary modulation according to claim 1, characterized in that: The signal receiving device includes a reflector (12) and a photodetector (13). The reflector (12) reflects the modulated light signal onto the photodetector (13). After receiving the signal, the photodetector (13) transmits the light signal to the signal processing unit (9).
6. A single-pixel imaging device with transmissive rotary modulation according to claim 1, characterized in that: The single-pixel imaging device also includes a periodic synchronization device, which includes a fully opaque photoelectric trigger and / or an angle encoder in a flag position.
7. A single-pixel imaging device with transmissive rotary modulation according to claim 1, characterized in that: The single-pixel imaging device also includes a sensor for detecting the rotational speed of the transmissive wheel (3) in connection with the signal processing unit (9).
8. An imaging method for a single-pixel imaging device with transmissive rotary modulation as described in claim 1, characterized in that: After the light emitted by the light source (5) illuminates the imaging target (6), it forms a light wave carrying the target information. The light wave carrying the target information is coupled to the transmissive rotating wheel (3) through the imaging lens (7). The bar-coded mask on the transmissive rotating wheel (3) periodically modulates the light signal of the target scene through the modulation window on the transmissive rotating wheel (3). The modulated light signal is received by the signal processing unit (9). The signal processing unit (9) uses the received light signal and the acquired bar-coded timing and rotating wheel speed information to adjust the rotation speed of the transmissive rotating wheel (3). After adjusting to the optimal position, the signal processing unit (9) uses the received light signal, bar-coded timing, and modulated rotating wheel speed to synchronize and reconstruct the image.
9. An imaging method according to claim 8, characterized in that: The image reconstruction is performed by one or more of the following methods: linear inversion of full sampling measurement, linear inversion of sampling after necessary preprocessing and completion, and iterative optimization of sparse prior reconstruction method. The signal receiving device performs pre-amplification, bandpass / lowpass filtering and phase-locked amplification on the signal to improve the signal-to-noise ratio.
10. An imaging method according to claim 8, characterized in that: The barcode mask is a modular strip that automatically reads and loads the corresponding reconstruction parameters, inverse operators, and calibration files during loading via QR codes or RFID tags on the strip.