Fluorescent Signal Detection Apparatus Quantitative Analysis

The patent introduces fluorescent dyes as intermediary substances that bind to target materials (antigens, antibodies, or nucleic acids) in the diagnostic kit. These fluorescent markers serve as mediators between the biological target and the optical detection system, enabling quantitative measurement through fluorescence signal intensity while maintaining the simplicity of the RDT format. The fluorescent intermediaries convert biological interactions into measurable optical signals.

The patent replaces traditional visual or colorimetric detection methods with optical fluorescence detection. Instead of relying on human visual assessment of color changes, the system uses a light source to excite fluorescent markers and a detector to measure the emitted fluorescence intensity, substituting mechanical/visual assessment with optical physics-based measurement for enhanced precision.

The patent merges the fluorescent labeling step with the existing diagnostic kit manufacturing process. The fluorescent dyes are conjugated to antibodies, antigens, or nucleic acid probes during kit production, combining two functions (biological recognition and fluorescent signaling) into single integrated reagents. This reduces the need for separate labeling equipment and simplifies the overall manufacturing workflow.

The patent utilizes the inherent optical parameters of fluorescent dyes (excitation wavelength, emission wavelength, quantum yield) to achieve quantitative measurement. By selecting fluorescent markers with specific spectral characteristics and matching them with appropriate filters and light sources, the system achieves precise detection without complex manufacturing requirements. The parameter optimization occurs at the material selection stage rather than during device assembly.

The patent divides the detection apparatus into distinct functional modules: a light source unit (LED or laser diode), a reaction chamber containing the diagnostic kit, and a detection unit (photodetector or photomultiplier tube). Each module performs a specific function and can be independently optimized or replaced. This segmentation enables portable design by allowing compact arrangement of discrete components while maintaining detection functionality.

The patent designs the fluorescent detection apparatus to be universally applicable to different diagnostic kits by using standard化的 interfaces and configurable detection parameters. The system can detect various targets (antigens, antibodies, nucleic acids) by changing the fluorescent markers or adjusting detection wavelengths, making the device multi-functional without requiring separate specialized equipment for each test type.