Spectrophotometer
US6002477A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 1998 |
| Grant date | Dec 14, 1999 |
| Priority date | — |
| Expiry date | May 15, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/42
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A spectrophotometer including a light source (1) operative to emit a beam of light (15), an optical system for directing the light beam (15) to a sample (8) to be analyzed, and a detector (9) which detects the intensity of the light beam after the beam interacts with the sample (8). The light source (1) is operative to emit bursts of light separated by an interval during which no light is emitted. By way of example, a xenon tube may be used for that purpose. The spectrophotometer measures the intensity of the light beam generated by each burst of light after that beam interacts with the sample. Each such light beam may be divided into first and second parts (5 and 4) prior to interaction with the sample (8), and the optical system is arranged to direct the first part (5) to the sample (8) and to direct the second part (4) to a second detector (7) for conducting a reference measurement. A dark signal measurement may be conducted immediately before or after each burst of light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.