Multidirectional photoreactive absorption method
US7790353B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2001 |
| Grant date | Sep 7, 2010 |
| Priority date | — |
| Expiry date | Sep 22, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/2051
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for enhancing photoreactive absorption in a specified volume element of a photoreactive composition. In one embodiment, the method includes: providing a photoreactive composition: providing a source of light (preferably, a pulsed laser) sufficient for simultaneous absorption of at least two photons by the photoreactive composition, the light source having a beam capable of being divided: dividing the light beam into a plurality of equal path length exposure beams: and focusing the exposure beams in a substantially non-counter propagating manner at a single volume element of the photoreactive composition simultaneously to react at least a portion of the photoreactive composition. In another embodiment, a method includes: providing a photoreactive composition capable of photoreactive absorption: and exposing the photoreactive composition to laser light from a plurality of substantially non-counter propagating directions simultaneously, wherein the light overlaps in time and space at a predetermined focus spot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.