MEASUREMENT DEVICE FOR PERFORMANCE OF OPTICAL SYSTEM AND METHOD THEREOF

PURPOSE: A method for measuring the performance of an optical system is provided to measure the performance of the optical system by rotating or moving a subject, a light collecting lens, and a mirror with a separate driving member, thereby easily measuring the performance of the optical system per field even in case of the optical system of large-diameter. CONSTITUTION: A method for measuring the performance of an optical system comprises a light source, a light collecting lens(220), a beam splitter(300), a mirror(400), and image senor. The light collecting lens collects lights penetrated through a subject by being irradiated to the subject. The beam splitter receives lights collected by the light collecting lens and irradiates the lights to the light receiving unit, and penetrates the lights through the optical system. The mirror is arranged in a side opposite to the light receiving unit and reflects the lights penetrated through the optical system and penetrates the reflected light through the optical system again. The image sensor is arranged in the light receiving unit side and receives the lights re-penetrated through the optical system, thereby imaging the subject.