Filter for shielding infrared ray
A filter and infrared technology, applied in the direction of nonlinear optics, optics, optical components, etc., can solve the problem of insufficient infrared absorption capacity, etc., and achieve the effects of excellent infrared shielding performance, high transparency, and high heat resistance
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Embodiment 1
[0141]
[0142] First, by using the microparticle preparation method described in J.phys.chem.B 2003, 107, 2466-2470, a silver particle dispersion in the shape of a hexagonal plate was prepared. The obtained silver particle dispersion liquid was centrifuged (10,000 r.p.m. for 20 minutes). Thereafter, the supernatant was discarded and concentrated appropriately. In this way, a particle dispersion of hexagonal flat silver particles was obtained.
[0143] The aspect ratio R of the obtained hexagonal flat silver particles was measured according to the method described in the specification of the present invention. As a result, the value was R=12. The aspect ratio R is an average value obtained from the measured values of 100 flat plate particles. In addition, as a result of measuring according to the method described in the specification of the present invention, the equivalent spherical diameter of the particle diameter of the hexagonal flat silver particles was 20 nm.
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Embodiment 2
[0154] In Example 1, except replacing the hexagonal flat silver particle dispersion solution with the triangular flat silver particle dispersion solution prepared as follows, an infrared shielding filter was produced in the same manner as in Example 1, and the same evaluation was performed.
[0155] Similar to Example 1, it was found that there is spectral absorption near 800 nm, and an infrared shielding effect can be obtained. In addition, an ultraviolet shielding effect can also be obtained. In addition, the infrared shielding filter of this embodiment can be manufactured at low cost, and has excellent transparency and heat resistance.
[0156]
[0157] First, a triangular plate-shaped silver particle dispersion was prepared by the method for preparing microparticles described in NANO LETTERS 2002 Vol.2, No. 8903-905. The obtained dispersion liquid was centrifuged (10,000 r.p.m. for 20 minutes). The supernatant was discarded and concentrated appropriately. Thus, a part...
Embodiment 3
[0161] An infrared shielding filter was produced in the same manner as in Example 1 except that the rod-shaped silver particle dispersion solution prepared as follows was used instead of the hexagonal plate silver particle dispersion solution in Example 1, and the same evaluation was performed.
[0162] Similar to Example 1, it was found that there is spectral absorption near 850 nm, and an infrared shielding effect can be obtained. In addition, an ultraviolet shielding effect can also be obtained. In addition, the infrared shielding filter of this embodiment can be manufactured at low cost, and has excellent transparency and heat resistance.
[0163]
[0164] First, a rod-shaped silver particle dispersion was prepared by the microparticle preparation method described in Materials Chemistry and Physics 2004, 84, P 197-204. The obtained dispersion was subjected to centrifugation treatment (10,000 r.p.m., 20 minutes). The supernatant was discarded and concentrated appropriat...
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Abstract
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