Projecting device
US4626082A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1984 |
| Grant date | Dec 2, 1986 |
| Priority date | — |
| Expiry date | Sep 4, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/525
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projecting device comprising an array of axial element lens systems, wherein each element lens system includes a single bar lens having an axial length larger than the effective aperture and adapted to form an intermediate image of a pixel of the object plane and an erect image of a magnification of unity not vertically nor laterally inverted in such a manner that the light intensity on the image plane corresponding to said pixel is defined in the form of Gaussian distribution by the eclipse of the aperture. The element lens systems are arranged in a plane perpendicular to the optical axis so as to cause the light intensity distributions of said systems to mutually overlap in the peripheral areas thereof on the image plane, wherein each row of the systems in the array is displaced by a half pitch with respect to the neighboring row to constitute a staggered arrangement thereby achieving a uniform exposure distribution, integrated in time, in the scanning direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.