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Wide-angle catadioptric lens with a rectilinear projection scheme
Gyeong-il Kweon1, Seung Hwang-Bo, Geon-hee Kim
1Department of Optoelectronics, Honam University, Gwangju, South Korea. kweon@honam.ac.kr
Applied Optics
|November 23, 2006
Summary
A new wide-angle catadioptric lens offers a broad 151-degree field of view with minimal distortion (<1%) for security surveillance. This advanced lens is designed for miniature cameras using color CCD sensors.
Area of Science:
- Optical Engineering
- Imaging Technology
Background:
- Wide-angle lenses are crucial for surveillance, but traditional designs often suffer from significant distortion.
- Catadioptric systems offer potential for wide fields of view in compact designs.
Purpose of the Study:
- To develop a catadioptric wide-angle lens with a rectilinear projection for security and surveillance applications.
- To achieve a wide field of view with minimal optical distortion.
Main Methods:
- Design of a catadioptric lens system utilizing a rectilinear projection scheme.
- Integration with a miniature 1/3-inch video graphics array (VGA) color CCD sensor.
- Optical performance evaluation including field of view, distortion, and modulation transfer function (MTF).
Main Results:
- Achieved a field of view exceeding 151 degrees.
- Maintained image distortion below 1%.
- Demonstrated a modulation transfer function (MTF) greater than 0.3 at 70 line pairs/mm across the sensor.
Conclusions:
- The developed catadioptric lens meets the demanding requirements for high-performance security surveillance.
- Its wide field of view and low distortion make it suitable for miniature camera systems.
- The lens design offers excellent image quality for critical monitoring applications.
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