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对Solc型滤光片基本原理的分析,表明改变单轴晶体光程差就可实现可调谐滤光。向列相液晶具有电控双折射效应,因此提出利用平行定向的向列相液晶盒作为电控双折射相位元件构成可调谐的Solc型滤光片。设计并制作了一种具有代表性的六片式扇形结构形式。实验表明,该器件具有良好的调谐性能,可实现在450～650nm区间光谱分辨率小于93nm和在550～650nm区间光谱分辨率20nm的可调谐滤光。Solc型滤光电具有透射率高、旁瓣少的优点,可应用在要求高透射率的场合。
Analysis of the basic principles of the Solc filter shows that tunable filters can be achieved by changing the optical path length difference of uniaxial crystals. The nematic liquid crystal has the effect of electrically controlled birefringence. Therefore, it is proposed to use the parallel-oriented nematic liquid crystal cell as the electrically controlled birefringent phase component to form a tunable Solc-type optical filter. A typical six-piece fan-shaped structure is designed and manufactured. Experiments show that the device has good tuning performance and can achieve tunable filter with spectral resolution of less than 93nm in 450-650nm range and spectral resolution of 20nm in 550-650nm range. Solc filter with high transmittance, side lobe advantages, can be used in applications requiring high transmittance.