| 摘要 |
<p>A vertical cavity surface emitting optical device has an optical confinement structure, such as the top electrode, which is specially shaped to provide an optical output that has a shape orthogonal to the beam axis of the optical device which shape is substantially non-circular, e.g. polygonal, so as to enable direct projection of predetermined, complex shapes and patterns of light in the form of letters, numbers, symbols, logos, trademarks and other information bearing patterns.</p> |
