Optical element
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsAkito Sawada, Masaki Hashimoto
Life of this patent
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Abstract
There is provided an optical element comprising a base material comprising a resin material and a stack covering of layers disposed on the base material. In the optical element of the present disclosure, the stack covering comprises an optical multi-layered part composed of a high refractive index layer comprising Ta2O5 and a low refractive index layer comprising SiO2, the high refractive index layer and the low refractive index layer being alternately stacked in a form of 4 or more layers. Of a plurality of high refractive index layers, a first high refractive index layer situated most closely to the base material has a fissured structure.
Claims14
An optical element, comprising:
- a base material and a stack covering of layers disposed on the base material, the base material comprising a resin material, wherein:
- the stack covering comprises an optical multi-layered part composed of high refractive index layers each comprising Ta2O5 and low refractive index layers each comprising SiO2, the high refractive index layers and the low refractive index layers being alternately stacked in a form of 4 to 50 individual layers or,
- a first high refractive index layer of the high refractive index layers comprises a fissured structure, the first high refractive index layer being situated most closely to the base material,
- the fissured structure comprises a low molecular density part which is positioned between respective ones of high molecular density parts in the high refractive index layers,
- the low molecular density part comprises Ta2O5, and
- a molecular density of Ta2O5 of the low molecular density part is lower than a molecular density of Ta2O5 of each of the high molecular density parts.
Dependencies are inferred from the claim text.