LIGHT BEAM HEATING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide the light beam heating device capable of executing detaching and attaching work of a protective glass in a short time and moreover preventing the protective glass from deterioration. SOLUTION: The protective glass 12 for protecting the condensing lens 11 of a lens unit 20 is attracted with the attracting force of a magnet 22 via a protecting glass attaching ring 24 to attach it to a mirror cylinder 21. Also, a handle 25 is attached to the protecting glass attaching ring 24. Even when the protecting glass 12 is soiled with the scatter of flux or the like at the time of soldering, the protective glass attaching ring 24 and the protective glass 12 are easily detached and attached with the handle 25, whereby cleaning is allowed and working efficiency is improved.