Scanning type projector
US5369521A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 10, 1992 |
| Grant date | Nov 29, 1994 |
| Priority date | — |
| Expiry date | Nov 10, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/70358
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A scanning type projector of a refractive optical system which has a wide field and projects with high resolution power. The scanning type projector projects an object to be projected by scanning with a predetermined scanning width, wherein the scanning type projector has an illuminating portion which illuminates the object to be projected through a circular arc region having its center on the center line of said scanning width, a refraction projecting optical system in which an aberration of the circular arc region having its center on the optical axis is corrected, and an image of the object to be projected illuminated in a circular arc shape by the illuminating portion is formed within an image plane, a light receiving member which is arranged at the plane of the object to be projected and the image, and a driving unit which relatively moves the illuminating portion and the projecting optical portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.