Optical spectrum measuring apparatus
US5784159A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 1996 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | Dec 18, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical spectrum measuring apparatus is disclosed that is able to take measurements at high speed. An encoder is connected to the rotational axis of a motor. A counter counts the number of pulses outputted from the encoder 14. A comparator, that is connected to the counter and a register, compares a value stored in the counter with a value stored in the register set by a control section, and outputs an AD conversion signal when the values are equal. The control section sets the register with a value corresponding to a first measurement point and rotates a diffraction grating at a constant speed from an angle corresponding to a measurement initiation wavelength to an angle corresponding to a measurement termination wavelength. An AD conversion signal is outputted from the comparator when a measurement point is reached, then the control section sets the register to a value corresponding to the next measurement point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.