Measurement of transmission spectra of pharmaceutical tablets
US5760399A · kind A · utility
29Cited by
12References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1995 |
| Grant date | Jun 2, 1998 |
| Priority date | — |
| Expiry date | Oct 2, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/3563
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an instrument for making an NIR spectrographic transmission measurement of a pharmaceutical tablet, masking structure is provided to prevent or reduce leakage of radiation around the edge of the tablet. The masking structure (30, 44) constricts the boundary of the light beam so that it is within the boundary of the top surface of the tablet where it impinges upon the top surface. The tablet is received in a well slightly larger than the tablet formed in a tablet locator (20). An aperture (39) is formed in the bottom of the well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.