Laser Irradiation Start Position Control Using Rotation Detection

The system incorporates a rotation detector that continuously monitors the rotational position of the object during conveyance and feeds this information back to the irradiation controller. The controller then dynamically adjusts the laser irradiation start position based on the detected rotation, ensuring accurate irradiation despite object rotation. This feedback mechanism resolves the contradiction by maintaining high manufacturing precision without requiring overly complex mechanical adjustment systems.

The invention replaces complex mechanical adjustment mechanisms with an information-based control system. Instead of using mechanical devices to physically adjust the laser position based on object rotation, the system uses a rotation detector to sense the rotation and an irradiation controller to calculate and adjust the start position electronically. This substitution of mechanical adjustment with electronic control maintains simplicity while achieving high precision.

The irradiation controller serves multiple functions: it manages the laser irradiation process, receives rotation information from the rotation detector, calculates the appropriate start position adjustment based on detected rotation, and controls the laser timing. By making the controller multi-functional, the system achieves high manufacturing precision without adding separate dedicated components for each function, thereby limiting the increase in device complexity.

The rotation detector acts as an intermediary component that bridges the object's physical rotation state and the control system's digital processing. It converts the mechanical rotation into detectable signals that the irradiation controller can process, enabling precise adjustment without requiring direct mechanical coupling between the object and the control system. This intermediary approach maintains system simplicity while achieving the desired precision.