Optical member and process for producing it and thin films

Details Optical member and process for producing it and thin films Optical member and process for producing it and thin films

G - Physics

02

B

G02B 1/11 (2006.01) B29D 11/00 (2006.01) C23C 16/22 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2421538

An optical member having an improved durability characteristic relative to the durability characteristic of conventional water-repellent films, and a process of producing such an optical member. The optical member has an antireflection film on a substrate, and an outermost layer of the antireflection film is a layer containing, as a major component, vapor-deposited silicon dioxide. The layer is further provided externally with a fluorine--containing water-repellent layer. The optical member has the following characteristics: (1) when the water-repellent layer is initially provided, a stationary contact angle (stationary contact angle before rubbing) to water is at least 104°C, and (2) when a chamois skin is dipped in water at 25°C for 5 minutes, and the surface of the water--repellent layer then is rubbed 10,000 times by the chamois skin while applying a load of 500 g, a stationary contact angle (stationary contact angle after rubbing) is from 0 to 10° smaller than the stationary contact angle before rubbing.

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