Optical element with laser damage suppression film
US7852562B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 2, 2006 |
| Grant date | Dec 14, 2010 |
| Priority date | — |
| Expiry date | Aug 3, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical element having a laser damage suppression film which is capable of withstanding high power blue laser and formed on a plastic substrate. Specifically disclosed is an antireflection optical element wherein a multilayer film, which is composed of low refractive index material layers (105) and high refractive index material layers (107) arranged alternately, is formed on a plastic substrate. In this antireflection optical element, the oxygen permeability coefficient is decreased such that variation in laser permeability is 2% or less after being continuously irradiated with blue laser having an energy density of 120 mW/mm2 for 1000 hours at an ambient temperature of 25° C. In one embodiment, the oxygen permeability coefficient is set at 30 cm3·mm m2·24 hr·atm) or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.