Optical cell measurement apparatus
US7251035B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2005 |
| Grant date | Jul 31, 2007 |
| Priority date | — |
| Expiry date | Jul 6, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/3504
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An inventive optical cell measurement apparatus comprises a light source (S) which emits light having a predetermined wavelength range, a first mirror (M1) which reflects the light emitted from the light source (S), a long light path gas cell (1) to which the light reflected on the first mirror (M1) is introduced, a second mirror (M2) which reflects light outputted from the long light path gas cell (1), a sensor (D) which detects the light reflected on the second mirror (M2), and optical elements (21, 22) disposed in a light path extending from the light source (S) to the sensor (D) and each having a bifocal property with different focal lengths as measured in two directions (X, Y) perpendicular to the light path. With this arrangement, the aberration of spherical mirrors (6, 7) disposed in the gas cell (1) is corrected, thereby preventing reduction of the transmittance of the gas cell (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.