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US 9,753,299 B2Granted
Optical element
AssigneeAsahi Glass Company, Limited
InventorsSo Ishido, Hiroki Hotaka, Kensuke Ono, Takuji Nomura
Life of this patent
Estimating the term…
Abstract
An optical element in which transmittance of light monotonically decreases from a center portion toward a peripheral portion, the optical element includes an absorbing material portion made of a material that absorbs a part of light and formed such that its thickness monotonically increases from the center portion toward the peripheral portion; and a transparent material portion made of a material that transmits light and is stacked on the absorbing material portion, a total thickness of the absorbing material portion and the transparent material portion being substantially constant.
Claims24
An optical element comprising:
- an absorbing material portion made of a material that absorbs a part of light and formed such that the absorbing material portion has a thickness monotonically increases from a center portion of the absorbing material portion toward a peripheral portion of the absorbing material portion;
- and
- a transparent material portion made of a material that transmits light and stacked on the absorbing material portion,
- wherein the absorbing material portion and the transparent material portion are formed such that a total thickness of the absorbing material portion and the transparent material portion is substantially constant, and the absorbing material portion is formed such that the absorbing material portion satisfies |T450−T650|≦5% within a region where an average value of transmittance from wavelength of 380 nm to 700 nm is between 40% to 80%, where T450 is transmittance at a wavelength of 450 nm and T650 is transmittance at a wavelength of 650 nm.
1 more element
An optical element, comprising:
- an absorbing material portion made of a material that absorbs a part of light and formed such that the absorbing material portion has a thickness monotonically increases from a center portion of the absorbing material portion toward a peripheral portion of the absorbing material portion;
- and
- a transparent material portion made of a material that transmits light and stacked on the absorbing material portion,
- wherein the absorbing material portion and the transparent material portion are formed such that a total thickness of the absorbing material portion and the transparent material portion is substantially constant, and the absorbing material portion is formed such that an OD value of the absorbing material portion, when a thickness of the absorbing material portion is 10 μm, is greater than or equal to 0.2.
1 more element
An optical element, comprising:
- an absorbing material portion made of a material that absorbs a part of light and formed such that the absorbing material portion has a thickness monotonically increases from a center portion of the absorbing material portion toward a peripheral portion of the absorbing material portion;
- and
- a transparent material portion made of a material that transmits light and stacked on the absorbing material portion,
- wherein the absorbing material portion and the transparent material portion are formed such that a total thickness of the absorbing material portion and the transparent material portion is substantially constant, and the absorbing material portion is formed such that a haze value of the absorbing material portion, when an OD value of the absorbing material portion is 1, is less than or equal to 10%.
1 more element
An optical element, comprising:
- an absorbing material portion made of a material that absorbs a part of light and formed such that the absorbing material portion has a thickness monotonically increases from a center portion of the absorbing material portion toward a peripheral portion of the absorbing material portion;
- and
- a transparent material portion made of a material that transmits light and stacked on the absorbing material portion,
- wherein the absorbing material portion and the transparent material portion are formed such that a total thickness of the absorbing material portion and the transparent material portion is substantially constant, and the material of the absorbing material portion comprises a photocurable absorbing material having a viscosity which is greater than or equal to 50 mPa·s and less than or equal to 3500 mPa·s at 30° C.
1 more element
Dependencies are inferred from the claim text.