| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a living body optical measuring device capable of preventing the deterioration of measuring precision caused by wavelength transition of a light source, and performing high-precision measurement. <P>SOLUTION: The living body optical measuring device comprises a semiconductor laser 111 as a light source, a laser activating element 112 for applying a predetermined current to the semiconductor laser 111, and a modulation applying element 113 for superimposing a radio frequency wave of a few megahertz onto the current from the laser activating element 112. This turns on and off the laser at a frequency substantially faster than a sampling interval of a light receiving element, eliminates the discontinuity of the amount of light received occurring in the light receiving element caused by wavelength transition of the laser, and obtains continuous changes capable of being corrected by a temperature compensating circuit or the like. <P>COPYRIGHT: (C)2003,JPO</p> |
