Radiation scanning system with pupil control
US4912321A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1988 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | Dec 14, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/126
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A radiation scanning system is used with a radiation detector that has a predefined aperture stop. A first relay lens disposed to form a first image of the radiation detector a predefined distance from the aperture stop and a second relay lens is located a predetermined distance from the first relay lens and disposed to form a second image of the radiation detector onto a line scanning apparatus. The line scanning apparatus includes a rotor having a plurality of reflective planar facets disposed uniformly around its circumference. Each of the reflective planar facet has a normal substantially perpendicular to the axis of rotation of the rotor. The rotor is interposed between the second relay lens and the second image of the radiation detector and has its axis of rotation intersecting the optical axis of the second relay lens and disposed in such a way that as the rotor is rotated the second image is caused to move in a substantially circular locus. A concave substantially toroidal mirror is positioned to receive deviated rays from a field lens position on the locus to deviated rays reflected from any given rotational positional position of the rotor onto the concave substantially t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.