Joseph von Fraunhofer was a German physicist and optical lens maker born on March 6, 1787. He is best known for his work in spectroscopy, particularly for discovering the Fraunhofer lines, which are dark lines in the spectrum of sunlight. These lines occur due to the absorption of specific wavelengths by elements in the Sun's atmosphere. Fraunhofer also made significant contributions to the development of high-quality optical instruments, including telescopes and microscopes. His innovations in lens design improved the clarity and precision of these devices, greatly advancing the fields of astronomy and microscopy. He passed away on June 7, 1826, leaving a lasting legacy in science.