Optical element
AssigneeSeiko Epson Corporation
InventorsFumitake MATSUZAKI, Hiroshi MATSUMOTO
Life of this patent
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Abstract
An optical element includes: a first base member having transparency; a second base member having transparency; and a bonding layer that bonds the first base member and the second base member and is provided by a plasma polymerizing method, wherein the bonding layer includes a siloxane bond (Si—O), and a elimination group binded to the Si skeleton, and when a thickness of the bonding layer is d, a wavelength of transmitted light is λ, and a refractive index of the bonding layer at the wavelength λ is n, following expressions are satisfied: n×d/λ={(M+1)/2}+α (1) −0.1≦α≦+0.2 (2) where, M is a natural number.
Claims16
An optical element comprising:
- a first base member having transparency;
- a second base member having transparency;
- and
- a bonding layer that bonds the first base member and the second base member and is provided by a plasma polymerizing method, wherein the bonding layer includes a Si skeleton that contains a siloxane (Si—O) bond, and an elimination group that binds to the Si skeleton, and
- when a thickness of the bonding layer is d, a wavelength of transmitted light is λ, and a refractive index of the bonding layer at the wavelength λ is n, following expressions are satisfied:
- n×d/λ={(M+1)/2}+α (1)
- −0.1≦α≦0.2 (2)
- where, M is a natural number.
Dependencies are inferred from the claim text.