Methods and Results: Making a fire by using a parabolic reflector (concave mirror) is well known because of the Olympic torch lighted by a solar reflector in Greece. From anecdotes or myths about Dioceles and Archimedes in the third century BC, a long history has been chronicled in books and films in Western culture. However, another history has existed in Asian countries from 2000 years ago. Some reflectors have tiny sizes 6.5–10 cm in diameter and 4 mm to 1 cm in thickness, and these mobile handheld devices have been used for multiple purposes. Bronze reflectors were described in Dongeui-bogam and have been excavated from the ancient remains of the Shilla and the Koryo dynasties. This common device for starting a fire was used as a moxibustion device, one of the acupuncture and moxibustion modalities in traditional Korean medicine.
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