Method for fabricating a prism and method for fabricating an optical system
US6870694B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2003 |
| Grant date | Mar 22, 2005 |
| Priority date | — |
| Expiry date | Nov 18, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/0006
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for fabricating a prism that comprises a first and a second substrate, both translucent, bonded together with an optical thin film interposed at the interface in between and that is used with the interface inclined relative to the optical axis of incident laser light of a wavelength of 420 nm or shorter includes the step of bonding together the first and second substrates of which the difference ΔN1 in refractive index at the wavelength of the laser light fulfills the condition: ΔN1≦|1/(0.3×104×NA×t)|, where t represents the thickness of the first and second substrates cemented together as measured along the optical axis of the laser light, and NA represents the numerical aperture of the incident laser light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.