Fusion Splicer Wavelength-Based Focus Adjustment

The patent replaces the mechanical drive motor system with an optical system. Instead of using a high-precision drive motor to physically adjust the imaging device position, the invention uses light of different wavelengths to optically adjust the focal position. The irradiation unit emits light at multiple wavelengths, and the control unit selects appropriate wavelengths to achieve focus adjustment without mechanical movement, thereby eliminating the need for complex drive mechanisms while maintaining detection precision.

The patent changes the wavelength parameter of the irradiation light to achieve focal position adjustment. By irradiating the optical fiber with light at different wavelengths (e.g., first wavelength and second wavelength), the system can adjust the focus position optically. This parameter change approach allows precise focal control without mechanical actuation, simplifying the imaging device structure while improving reliability.

The patent eliminates mechanical moving parts by substituting the drive motor with an optical wavelength selection mechanism. The control unit controls the irradiation unit to emit light at specific wavelengths to achieve focus adjustment without any mechanical movement. This contactless, wear-free mechanism significantly improves long-term reliability while maintaining the ability to accurately detect the optical fiber core position.

The optical fiber itself provides the focusing information through its interaction with different wavelength light. By irradiating the optical fiber with multiple wavelengths and analyzing the transmitted or reflected light, the system uses the optical fiber's own optical properties to determine focus position, eliminating the need for external mechanical adjustment mechanisms and improving system reliability.

The irradiation unit is designed with multi-functionality to emit light at multiple wavelengths. Rather than using separate light sources for each wavelength, the system employs a unified irradiation unit that can generate and switch between different wavelengths (e.g., first wavelength and second wavelength). This multi-functional design enables fast focus adjustment through wavelength selection while avoiding the complexity of multiple independent light source systems.

The system dynamically switches between different light wavelengths based on the required focus position. The control unit dynamically selects which wavelength to emit from the irradiation unit, enabling rapid focus adjustment without mechanical movement. This dynamic wavelength selection provides fast detection speed while keeping the physical structure simple, as only one irradiation unit is needed that can operate at multiple wavelengths.