| 摘要 |
<p>An optical power meter using a thermal detector, with improved response time, in which a fast response sensor is mounted close to the thermal detector, in such a location that it senses a part of the incident beam to be measured. The output signal of the fast response sensor, and the output signal of the thermal detector are electronically combined, such that response characteristics of the fast response sensor are impressed on the output of the thermal detector, thus providing a power meter combining the power handling ability and the accuracy of the thermal detector with a response characteristic of the fast response sensor. This method of combining fast and slow response sensors is also applicable to other measurements, whether physical, chemical or biological, such as those of flow, velocity, temperature, pressure, electrical, electronic, magnetic, thermal, optical, radiative, dimensional or acoustic properties of a material or article.</p> |
