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发明授权
CN1721890B 滤光器 失效 - 权利终止 复审申请

滤光器
摘要：
滤光器在一种带通滤光器中，能防止折射率的变化的用作滤光器的玻璃陶瓷，在-20℃～+70℃的温度范围内，其具有的热膨胀系数在95×10-7/℃～140×10-7/℃范围内，并且，优选杨氏模数为85GPa和抗弯强度为10kg/mm2，以及，在950nm～1600nm的波长范围内，对于10mm厚片的透光度为60％或以上。这些玻璃陶瓷的主要晶相应优选为(a)二硅酸锂和(b)一种选自α-石英，α-石英固体溶液，α-方石英和α-方石英固体溶液。
摘要（英）：

Glass-ceramics for a light filter capable of preventing variation of refractive index in a band-pass filter have a coefficient of thermal expansion within a range from 95*10-7/DEG C to 140*10-7/DEG C within a temperature range from -20 DEG C to +70 DEG C and, preferably, Young's modulus of 85GPa and bending strength of 10kg/mm2, and light transmittance for plate thickness of 10mm of 60% or over within a wavelength range from 950nm to 1600nm. Predominant crystal phases of these glass-ceramics should preferably be (a) lithium disilicate and (b) one selected from the group consisting of alpha -quartz, alpha -quartz solid solution, alpha -cristobalite and alpha -cristobalite solid solution.

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