Prism optics and optical information processing apparatus
US4770507A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 11, 1985 |
| Grant date | Sep 13, 1988 |
| Priority date | — |
| Expiry date | Feb 11, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/1398
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical system for converting the shape of a light beam by making use of refraction of prisms comprises a prism optic which includes a complex prism constituted by combination of at least two types of prisms made of materials differing from each other in respect to dispersion of refractivity. An optical information processing apparatus includes the optical system employing the prisms. Geometric optical properties of the optical system are insusceptible to being changed irrespective of changes in wavelength of the light beam brought about by dispersion in oscillation wavelength of a light source, change in the course of time lapse, change in ambient temperature and/or change in emitted light energy. With the optical system, information processing is realized which is insusceptible to the influence of the change in wavelength of the light beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.