Optimization method of the cam curve for a continuous zoom optical system

Area of Science:

• Mechanical Engineering
• Optical Engineering
• Control Systems

Background:

• Zoom cam mechanisms are crucial for continuous optical adjustments.
• Ensuring stable driving force and control in zoom systems is challenging.
• Existing methods may lack efficiency or precision in cam curve design.

Purpose of the Study:

• To develop and validate effective methods for optimizing zoom cam curves.
• To enhance the stability and controllability of zoom cam cylinder driving forces.
• To achieve smooth, continuous zoom movements with consistent torque.

Main Methods:

• Establishing correlation between zoom and compensation group cam curves via coordinate system selection.
• Method 1: Direct processing of original data using target cam curve functions and dynamic parameter verification (e.g., pressure angle).
• Method 2: Constructing a physical model with multiple cam curves and a single-variable driving force, utilizing step search optimization.

Main Results:

• Two distinct cam curve optimization methods were proposed and evaluated.
• Dynamic simulation confirmed that designed cam curves enable stable torque for continuous zoom.
• The optimized cam curves effectively drive both zoom and compensation groups for seamless movement.

Conclusions:

• Optimized cam curves significantly improve the stability and control of zoom cam cylinders.
• Both proposed optimization methods offer viable approaches to achieving desired cam profiles.
• The study demonstrates a pathway to enhanced performance in optical zoom systems.