Patent ID: 6611332
Filing Date: 2003-08-26
Classification: G01J

Abstract:
A wavelength-variable light source apparatus comprising:a wavelength-variable light source section comprising a RAM, a CPU, and a motor control section, and having an external resonance part for externally resonating emitted light from a semiconductor laser light source at a predetermined wavelength and for varying an external resonance condition in the external resonance part; wherein the wavelength-variable light source section checks that the emitted light is the predetermined wavelength based on a positional signal from the motor control section and wherein said wavelength-variable light source section controls the external resonance part by outputting a motor control signal to said motor control section based on a table stored in the RAM; and a light source detection section for allowing light of each wavelength emitted from said wavelength-variable light source section to be incident on an object to be measured, detecting a light output level of output light of each wavelength emitted from the object to be measured, and sending a signal to said wavelength-variable light source section, wherein said signal indicates the light output level; wherein said wavelength-variable light source section analyzes a light wavelength characteristic of the object to be measured based on the light output level of said signal output by said light detection section.