分光计的调节和应用 In 1814, Fraunhofer invented the spectroscope, and discovered 574 dark lines appearing in the solar spectrum Joseph von Fraunhofer (1787-1826) Fraunhofer demonstrating the spectroscope German physicist分光计的调节和应用 • In 1814, Fraunhofer invented the spectroscope, and discovered 574 dark lines appearing in the solar spectrum. Joseph von Fraunhofer (1787–1826) German physicist Fraunhofer demonstrating the spectroscope