Omnidirectional Lenses for Low Cost Laser Scanners
There is a need for small sensors that can provide 360° field of views in the intelligent vehicle applications. The usual technique has been to use a catadioptric system where a conical shaped mirror is placed in front of a camera, providing 360° horizontal field of view and in the order of tens of degrees of vertical view. The downside of these kinds of systems has been their size, usually ranging around 20 centimetres. A so-called omnidirectional lens can fold the optical path inside the lens decreasing the volume requirements considerably, while still providing comparative optical performance. In this work, two different omnidirectional lens systems are presented, the more common type of this lens images a whole surrounding scenery to an image sensor, providing instant 360° field of view. The other lens can select a known position from the 360° scenery, and provide an undistorted image of it. The other application for this type of lens is a laser scanner that necessitates direction selectivity.
KeywordsImage Sensor Camera Lens Direction Selectivity Aperture Stop Omnidirectional Image
Unable to display preview. Download preview PDF.
- Hrabar, S., Sukhatme, G., Omnidirectional Vision for an Autonomous Helicopter, Proceedings of IEEE International Conference on Robotics and Automation, 3602-3609, 2004.Google Scholar
- de Souza, G., Motta, J., Simulation of an omnidirectional catadioptric vision system with hyperbolic double lobed mirror for robot navigation, ABCM Symposium Series in Mechatronics, Volume 3, 613-622, 2008.Google Scholar
- Fernando, C. et al, Catadioptric Vision Systems: Survey, Proceedings of the Thirty-Seventh Southeastern Symposium on System Theory, 443-446, 2005.Google Scholar
- Yagi, Y., Yokoya, N., Omnidirectional Vision: A Survey On Sensors and Applications, Transactions of Information Processing Society of Japan, Volume 42, 1-18, 2001.Google Scholar
- Gal, E. et al, Self-contained panoramic or spherical imaging device, USP 7643052 B2, 2010.Google Scholar
- Agurok, I. et al, Passive Electro-Optical Tracker, USP 0278387 A1, 2010.Google Scholar
- Ge, Z., Mohcitate, S., Omnidirectional Imaging Apparatus, USP 0309957 A1, 2009.Google Scholar
- Gal, E., et al, Omni-directional imaging and illumination assembly, USP 7570437 B2, 2009.Google Scholar
- Ito, M., Murayama, O., Omni directional photographing device, USP 0002969 A1, 2008.Google Scholar