Temperature control device of an optical semiconductor device
US6012291A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 24, 1997 |
| Grant date | Jan 11, 2000 |
| Priority date | — |
| Expiry date | Dec 24, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/1931
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A temperature control device of an optical semiconductor device is provided for keeping the optical semiconductor device constant. An optical semiconductor device is fixed to a thermal conductor. One thermistor is arranged on the thermal conductor at the portion where it is susceptible stronger to an ambient temperature rather than the optical semiconductor device is susceptible to the ambient temperature while another thermistor is arranged on the thermal conductor at the portion where it is susceptible weaker to the ambient temperature rather than the optical semiconductor device is susceptible to the ambient temperature. The difference between an average temperature of the thermal conductor at two points detected by the thermistors and a set temperature is detected by a temperature detecting means comprising a bridge circuit having the thermistors which are connected to each other so as to form opposing sides of the bridge circuit and a differential amplifier for receiving an imbalanced voltage of the bridge circuit. The thus detected difference of the temperature is outputted to a temperature control circuit, whereby the temperature control circuit controls a Peltier driving cu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.