Apparatus and method for calibration of fluorescence detectors
US5414258A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 22, 1993 |
| Grant date | May 9, 1995 |
| Priority date | — |
| Expiry date | Nov 22, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The response of a fluorescence detector is calibrated using apparatus and methods for both static and dynamic calibrations. The apparatus and methods are especially suited for portable use in field calibration of fluorescence detectors of authentication systems that use non-visible light. The calibration apparatus incorporates standard target elements (20) comprising predetermined fluorescent substances with known emission spectra, and either non-fluorescent substances or fluorescent substances with other known emission spectra. The substances are either mixed in predetermined proportions, or one substance is arranged in a predetermined pattern (170), such as a bar code, on the other substances. An aperture (30) exposes a predetermined surface area of a standard target element to the view of the fluorescence detector. The distance of the standard target element from the optical front end (70) of the fluorescence detector to be calibrated is adjustable (50). For dynamic calibration, the standard target element is moved from one position to another in the apparatus in a predetermined time. Multiple standard target elements are substituted individually into the apparatus or are carrie…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.