X-ray collimator comprising light beam localizer with lens system
US4167675A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1977 |
| Grant date | Sep 11, 1979 |
| Priority date | — |
| Expiry date | Jun 8, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/08
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In the illustrated embodiment, the light source utilized to mark the x-ray beam is a halogen lamp with a small focus, an optical lens system being provided for concentrating the light beam on an operative portion of a light reflective mirror so as to amplify the light intensity of the beam reflected by the mirror and lying within the fully opened pairs of x-ray opaque plates. The mirror is shown disposed at approximately 45.degree. diagonally relative to the collimator longitudinal axis with the axis of the light source and optical system extending approximately perpendicularly to the collimator longitudinal axis. The mirror is located between sets of close-to-focus plates and sets of remote-from-focus plates so as to provide a reflected diverging light beam of frusto-pyramidal configuration conforming with the pyrmidal beam shape for x-ray energy defined by the sets of plates. As the plates are adjusted by a scissors action in respective planes, the transmitted light beam is adjusted so as to conform with the transmitted x-ray beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.