Plastic optical components
AssigneeFuji Photo Film Co., Ltd.
InventorsFumiyuki Suzuki, Noriko Eiha, Tadashi Mochizuki, Takeo Kido
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Abstract
The plastic optical component includes a main body and a transparent moisture-proof coating provided on all surfaces of the main body, the moisture-proof coating satisfying the following relation (1): (D1/d)×(L/D2)<10 (1) where D1 (mm2/s) is a water diffusion coefficient of a first material of which the moisture-proof coating is made, d (mm) is a thickness of the first material, D2 (mm2/s) is the water diffusion coefficient of a second material of which the main body is made, and L (mm) is an average thickness across an optical surfaces of the second material.
Claims3
A plastic optical component comprising:
- a main body;
- and
- a transparent moisture-proof coating provided on all surfaces of said main body, said moisture-proof coating satisfying the following relation (1):
- (D1/d)×(L/D2)<10 (1)
- where D1 (mm2/s) is a water diffusion coefficient of a first material of which said moisture-proof coating is made, d (mm) is a thickness of the first material, D2 (mm2/s) is the water diffusion coefficient of a second material of which said main body is made, and L (mm) is an average thickness across an optical surfaces of the second material.
Dependencies are inferred from the claim text.