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Design, fabrication, and testing of a Shack-Hartmann sensor with an automatic registration feature
Applied Optics
|November 10, 2016
Summary
This study introduces an innovative, low-cost Shack-Hartmann sensor with a unique no-spot feature for reliable wavefront detection and automatic error correction. The novel design enables precision measurements using readily available components.
Area of Science:
- Optical Engineering
- Metrology
- Instrumentation
Background:
- Shack-Hartmann sensors are crucial for wavefront analysis.
- Existing sensors can be complex and costly.
- Accurate registration of measurement spots is essential for reliable data.
Purpose of the Study:
- To design, construct, and test an innovative and low-cost Shack-Hartmann sensor.
- To integrate a polymer microlens array with a CMOS camera.
- To develop a novel automatic registration method using a unique diffusing surface.
Main Methods:
- Injection molding of a polymer microlens array.
- Mounting the array onto a board-level CMOS camera.
- Creating a diffusing surface for automatic spot registration and a no-spot reference.
Main Results:
- Successful design, construction, and testing of the Shack-Hartmann sensor.
- Demonstrated precision wavefront detection using low-cost components.
- Validated the reliability and simplicity of the automatic registration method.
Conclusions:
- The developed Shack-Hartmann sensor offers a cost-effective solution for precision wavefront detection.
- The no-spot feature effectively enables automatic registration and elimination of tip-tilt errors.
- The innovative design is suitable for various optical metrology applications.
