Aiming at focusing-type solar simulator. the paper researches the relationship between the defocusing amount and the facula irradiance. With the optical system of focusing-type solar simulator as research object. simulation is conducted based on a short-arc xenon lamps and its ellipsoidal condenser. https://www.jmannino.com/mega-pick-NFL-San-Francisco-49ers-Zone-Block-iPhone-14-Pro-MagSafe-Case-p80213-quick-pick/