Piezoelectric bimorph optical beam scanners: analysis and construction

Area of Science:

• Mechanical Engineering
• Materials Science
• Electrical Engineering

Background:

• Traditional electromagnetic scanners face limitations in performance and lifespan.
• Piezoelectric bimorph beam scanners offer potential advantages in specific applications.

Purpose of the Study:

• To investigate methods for enhancing the angular excursion of piezoelectric bimorph beam scanners.
• To evaluate the performance trade-offs, particularly frequency response, of modified scanners.
• To compare piezoelectric bimorph beam scanners with electromagnetic scanners.

Main Methods:

• Incorporating mechanical advantage into the design of a bimorph beam scanner.
• Analyzing the impact of mechanical advantage on angular displacement.
• Assessing the effect on the scanner's frequency response.
• Considering and evaluating several alternative design configurations.

Main Results:

• Mechanical advantage significantly increases the angular excursion of the bimorph beam scanner.
• This increase in angular range is achieved with minimal loss in frequency response.
• Alternative designs were explored and evaluated for their viability.

Conclusions:

• Piezoelectric bimorph beam scanners with added mechanical advantage demonstrate superior performance.
• Their simplicity, infinite life, and improved angular capabilities make them a strong alternative to electromagnetic scanners.
• These enhanced piezoelectric scanners represent a viable technological advancement.