| 摘要 |
<p>The method involves determining spectral radiant powers at two different wavelengths by a spectrometer. Ratios of the spectral radiant powers are determined and temperatures of bulbs are determined based on the ratios of the spectral radiant powers. One of the wavelength lie in the range of 539 nanometer (nm) to 559 nm or 568 nm to 588 nm, and other wavelength lie in the range of 470 nm to 490 nm. Independent claims are also included for the following: (A) a method for controlling bulb temperature of high pressure-discharge lamps with a method for determining bulb temperature of high pressure-discharge lamps (B) a controller for bulb temperature of high pressure-discharge lamps.</p> |
