| 摘要 |
PROBLEM TO BE SOLVED: To provide an anti-fog optical device that minimizes fabrication cost and shows improvement in anti-fog efficiency.SOLUTION: The anti-fog optical device includes: an outer lens part 10 having a front lens 14; an inner lens 20 engaged with an inner wall of the outer lens part 10 and defining an accommodation space of a given size between the outer lens part 10 and the inner lens 20; a heat-blocking material disposed in the accommodation space to block heat transfer; and an anti-leakage part 30 engaged with a flange part of the outer lens part 10 to prevent the heat-blocking material from leaking. The outer lens part 10 has an injection hole 16 that allows the heat-blocking material to be injected into the accommodation space.SELECTED DRAWING: Figure 2 |
