Fog prevention and antireflection optical element and...

Optical: systems and elements – Protection from moisture or foreign particle

Reexamination Certificate

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C523S169000

Reexamination Certificate

active

06932482

ABSTRACT:
In a fog prevention and antireflection optical element including a first water absorption layer containing a water-absorbing polymer as its main component, a high refractive layer, and a second water absorption layer which are formed on a base in this order, an inorganic material (nd>1.70) is mixed in the water-absorbing polymer of the first water absorption layer, whereby the difference in refractive index with respect to the optical element is decreased.

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Heavens, O.S., Ph.D, “Optical Properties of Thin Solid Films” (New York, Dover Publications, 1991), p. 217.

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