Method for determining aperture shape
US4959541A · kind A · utility
14Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 3, 1989 |
| Grant date | Sep 25, 1990 |
| Priority date | — |
| Expiry date | Aug 3, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/02493
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A mathematical method for selecting the shape for an occluding aperture which is to be positioned at a predetermined aperture location in a light path extending between an illuminated line object and a linear photosensor array. Through use of the aperture selected according to the method, a light intensity measurement is obtained across the linear photosensor array which is uniformly proportional to the light intensity across the illuminated line object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.