Tolerance optimization of a mobile phone camera lens system

Area of Science:

• Optics and Photonics
• Manufacturing Engineering
• Computational Science

Background:

• Mobile phone camera lens manufacturing involves critical assembly tolerances like tilt and decenter.
• These tolerances significantly impact both production costs and optical performance.
• A systematic approach is needed for optimal tolerance allocation.

Purpose of the Study:

• To propose a tolerance design procedure for lens systems.
• To minimize production cost while meeting optical performance reliability constraints.
• To develop a method for optimal tolerance allocation in optical systems.

Main Methods:

• Tolerance analysis using Latin hypercube sampling for performance evaluation.
• Tolerance optimization via a function-based sequential approximate optimization technique.
• Reducing computational burden and numerical noise in optimization.

Main Results:

• Achieved a 28.3% reduction in optimal production cost compared to the initial cost.
• Successfully satisfied all reliability constraints on optical performance indices.
• Demonstrated the effectiveness of the proposed tolerance design procedure.

Conclusions:

• The developed tolerance analysis and design procedure effectively optimizes lens system manufacturing.
• This methodology can be applied to tolerance optimization in various other optical systems.
• Balancing cost and performance is achievable through systematic tolerance design.