| 摘要 |
<p>A wavelength selection device includes: two identical AOTF, one AOTF (101) for wavelength selection and the other AOTF (103) for monitoring; a reference light source unit (102) for inputting light of a particular wavelength to the monitor AOTF (103); a light reception unit (104) for detecting the wavelength of the light which has transmitted through the monitor AOTF (103); and a control unit (105) for outputting a control signal of a predetermined frequency for selectively transmitting incident light of an arbitrary wavelength through the wavelength selecting AOTF (101) according to the wavelength of the light detected by the light reception unit (104). The reference light source unit (102) includes a an LED (107) for outputting light of a wide wavelength band and an optical filter (108) having at least two transmission bands. By using the wavelengths of the light of at least two wavelengths outputted from the reference light source unit (102), the control unit (105) outputs a control signal of a frequency corresponding to an arbitrary wavelength light to the wavelength selecting AOTF (101).</p> |
