Liquid crystal composition for radio wave control element, and radio wave control element
AssigneeFUJIFILM Corporation
InventorsRyoji GOTO, Yukito SAITOH, Taketo OTANI, Hideki YASUDA
Life of this patent
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Abstract
A liquid crystal composition for a radio wave control element is provided. The composition serves as a material exhibiting a large refractive index anisotropy with respect to radio waves. The composition includes at least one dichroic coloring agent, with a total content of 30% by mass or more relative to the total mass of the liquid crystal composition. The liquid crystal composition exhibits high absorbance in the wavelength range of 350 to 1,000 nm, making it suitable for use in radio wave control elements requiring strong optical anisotropy and efficient absorption characteristics.
Claims20
A liquid crystal composition for a radio wave control element, the liquid crystal composition comprising:
- at least one dichroic coloring agent,
- wherein a total content of the dichroic coloring agent is 30% by mass or more with respect to a total mass of the liquid crystal composition for a radio wave control element, and
- an integrating accumulate absorbance Q represented by Expression (1) in a wavelength range of 350 to 1,000 nm in an absorption spectrum of a chloroform solution of the liquid crystal composition for a radio wave control element is 10,000 L·g−1·cm−1 or more,
- Q
- =
- 1
- D
- ·
- L
-
- ∫
- 350
- 1000
- Abs
-
- (
- λ
- )
-
- d
-
- λ
- Expression
-
- (
- 1
- )
- in Expression (1), Q represents an integrating accumulate absorbance (L·g−1·cm−1), D represents a mass concentration (g·L−1) of the liquid crystal composition for a radio wave control element in the chloroform solution, L represents an optical path length (cm) of a cell used for measuring the absorption spectrum, and Abs (λ) represents an absorbance at a wavelength λ (nm).
Dependencies are inferred from the claim text.