Method and apparatus for forensic examination of surfaces
US5455674A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 9, 1994 |
| Grant date | Oct 3, 1995 |
| Priority date | — |
| Expiry date | May 9, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/0291
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of illuminating a deposition of organic material such as, blood, sweat or oil for forensic examination is disclosed. Light having a wide range of wavelengths is generated and directed towards a reflective diffraction grating. The relative position of an exit slit with respect to the grating is adjusted to pass a desired band of wavelengths of output light from portions of the light reflected by the grating. The output light is then directed toward the deposition to be examined through the use of a fiber optic bundle, preferably a liquid fiber optic member. Adjustment of the relative position of the exit slit with respect to the grating is achieved by rotation of the grating. Movement is controlled by an electronic control and a handheld remote control pad.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.