Meadowlark Optics LC Variable Retarder, Uncompensated, 2'' Dia 900-1250nm

• 实现偏振的精密电控
• 提供适用于紫外至近红外波长的多种选项
• 兼容 Meadowlark Optics 液晶控制器

Meadowlark Optics 液晶可变延迟器通过改变施加电压下的有效双折射，实现对偏振的精确电控。这使得输入的偏振光可以转换为任意选择的椭圆偏振、线偏振或圆偏振。这些延迟器在光学平面熔融石英窗口之间采用双折射向列液晶材料制成，窗口有透明导电的氧化铟锡（ITO）镀膜，以在特定波长范围内实现最大透射。Meadowlark Optics 液晶可变相位延迟器非常适合用于计量和医疗应用中的主动偏振控制，如应力分析、药物成分分析和生物显微镜观察。对于未补偿的延迟器，在高电压下会存在约30nm的相位调节延迟。

请注意: 这些可变延迟器应通过无直流成分的交流波形进行电驱动，以防止离子积累，这可能损坏液晶层。控制时需要2 kHz的可调幅方波。推荐使用Meadowlark 液晶模拟和数字控制器确保满足驱动要求。

Meadowlark Optics Liquid Crystal Variable Retarders enable the precision electrical control of polarization through the variation of effective birefringence with applied voltage, altering the input polarized light to any chosen elliptical, linear, or circular polarization. As voltage is increased, retardance is decreased.  For uncompensated retarders, there will be a residual retardance of around 30nm at high voltage.

These retarders are constructed using a birefringent nematic liquid crystal material between optically flat fused silica windows coated with transparent conductive Indium Tin Oxide (ITO) for maximum transmission within a specified wavelength range. 

Each Meadowlark Optics Liquid Crystal Variable Retarder is supplied with retardance vs voltage performance data for the specified wavelength range, and a coaxial cable with mating connector is provided for easy attachment to one to Meadowlark Optics Liquid Crystal Controllers.

These variable retarders should be electrically driven with an AC waveform with no DC component to prevent ionic buildup which can damage the liquid crystal layer. For control, a 2 kHz square wave of adjustable amplitude is required.