1. Diffractive-optics-based micromirror scanning system
- Author
-
John E. Childers, Eric G. Johnson, Michael M. Johnson, John Barnett Hammond, Charles S. Koehler, and Thomas J. Suleski
- Subjects
Diffraction ,Microelectromechanical systems ,Materials science ,business.industry ,Beam steering ,Physics::Optics ,Breadboard ,Laser ,law.invention ,Optics ,law ,Optoelectronics ,business ,Diffraction grating ,Beam (structure) ,Gaussian beam - Abstract
Most laser projectors for LADAR systems are limited to small scan angles as they utilize acousto-optic devices, spatial light modulators, or fine-steering mirrors for beam steering. Additionally, the projected beam is usually circular and Gaussian. In order to improve the functionality of such systems, MEMS-based mirrors and diffractive optics may be used. This paper describes Digital Optics Corporation's work in developing and demonstrating a novel LADAR scanning system that incorporates a MEMS scanning mirror coupled with diffractive optical elements in a compact breadboard system. The MedCam MEMS mirror has been demonstrated with a 2D scan mode across large scan angles. The MEMS mirror system is experimentally compared to a Liquid Crystal Spatial Light Modulator based system. The diffractive elements generate spot arrays or other patterns that are more conductive to target detection schemes that an ordinary gaussian beam shape.
- Published
- 1999