Analyzer, absorption characteristic calculation circuit, and analysis method
US10345225B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 2018 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | Jun 21, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/3401
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An analyzer includes a quantum cascade laser that converts a cyclic driving signal to laser light; an optical receiver that receives the laser light having passed through a sample and outputs a detected signal depending on intensity of the laser light; and a data calculation portion that outputs information representing absorption characteristics of the sample. The data calculation portion includes a delaying unit that produces a time-delayed waveform by applying a time delay to a reference driving signal; an adding unit that produces a symmetrical waveform by adding the time-delayed waveform and the detected signal; a time inversion unit that produces a time-inverted waveform by time-inverting the symmetrical waveform; and a subtracting unit that produces a waveform difference between the time-inverted waveform and the symmetrical waveform. The data calculation portion repeatedly calculates the waveform difference by changing the time delay until the waveform difference is minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.