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    • 22. 发明授权
    • Infrared absorption filter
    • 红外吸收滤光片
    • US06522463B1
    • 2003-02-18
    • US09700299
    • 2000-11-13
    • Tetsuo ShimomuraShinya OnomichiMasanori KobayashiYozo YamadaSeiichiro Yokoyama
    • Tetsuo ShimomuraShinya OnomichiMasanori KobayashiYozo YamadaSeiichiro Yokoyama
    • G02B0000
    • G02B5/208
    • The infrared absorption filter of the present invention has a transmittance of not higher than 30% in the near-infrared region in the wavelength range of 800 to 1100 nm; a difference of 10% or less between a maximum value and a minimum value of transmittance in the visible light region in the wavelength range of 450 to 650 nm; and a transmittance of not lower than 50% at a wavelength of 550 nm, the filter being so excellent in environmental stability that after being left to stand in the air atmosphere at a temperature of 60° C. and a humidity of 95% for 1000 hours, the filter can maintain said spectral property in said range. Consequently, when used for a plasma display or the like, the filter can absorb the unwanted infrared rays radiated from the display, resulting in preventing erroneous operation of a remote control using infrared radiation even in such a high-temperature and high-humidity environment. The filter is gray in color so that when placed in front of a display, the color originated in the display can be seen without discoloration.
    • 本发明的红外线吸收滤光片在800〜1100nm的波长区域的近红外区域的透射率为30%以下; 在450〜650nm的波长范围内的可见光区域的透射率的最大值和最小值之间的差为10%以下; 并且在波长550nm下的透射率不低于50%,该过滤器的环境稳定性非常优异,在空气气氛中在60℃的温度和95%的湿度下放置1000 小时,过滤器可以将所述光谱特性保持在所述范围内。 因此,当用于等离子体显示器等时,滤光器可以吸收从显示器辐射的不想要的红外线,从而即使在这样的高温高湿环境下也能防止使用红外辐射的遥控器的错误操作。 过滤器的颜色为灰色,因此当放置在显示器的前面时,可以看到来自显示屏的颜色没有变色。