Optical system with grating lens assembly for correcting wavelength aberrations
US4832464A · kind A · utility
36Cited by
4References
45Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1987 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | Sep 18, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/1372
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical system having a grating lens assembly including a first grating lens which diffracts rays of a beam incident thereupon so as to provide non-parallel diffraction rays and a second grating lens which converges the non-parallel diffraction rays at a predetermined point substantially without aberration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.