| 摘要 |
A lens assembly construction method for near field recording is provided to be capable of applying low pressure or vacuum on one side or of using high-pressure air on both sides, thereby constructing a lens barrel and an objective lens without damaging to a coated surface of the objective lens as increasing coaxial assembling precision of the barrel and the lens when the lens is combined with the barrel. An objective lens(120) is installed by being displaced by pneumatic pressure. The pneumatic pressure is generated by air chucks(110,140). Attaching units of the objective lens(120) of the air chucks(110,140) are coated to prevent damage to a surface of the objective lens(120).
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