Method and apparatus for inhibiting a scattered component in a light having passed through an examined object
US5386819A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1993 |
| Grant date | Feb 7, 1995 |
| Priority date | — |
| Expiry date | Apr 14, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0059
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In the method and apparatus for inhibiting a scattered component in a light having passed through the interior of an examined object, a light is radiated to the examined object, the sum of a straight advancing light component and scattered light component of the light having passed through the interior of the examined object is detected, only the scattered light component of the light having passed through the interior of the examined object is detected and the straight advancing light component is detected by an operation using the two detected outputs. In the scattered component inhibiting method and apparatus, a light modulated with a period larger than the delay of the propagating time by the scatter in the examined object is radiated to the examined object, the light having passed through the interior of the examined object is detected and the straight advancing light component is extracted by extracting a predetermined phase of the detected output. Or, in the scattered component inhibiting method and apparatus, a light of a plurality of wavelengths is radiated to the examined object, the light having passed through the interior of the examined object is detected and the scatt…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.