Newport's VA-CB series of variable beam splitters provide continuous beam splitting or attenuation for CW lasers at specific wavelengths. The VA-CB series is designed to provide high contrast beam splitting of linearly polarized light. The motorized version can be used in open- or closed-loop operation. 
The VA-CB high energy series is based on zero-order half-waveplates and laser line polarizing cube beam splitters. These beam splitters are designed to handle CW or high energy pulsed laser input up to 2 MW/cm2CW, 1 J/cm2 at fixed wavelengths including 442 nm, 488 nm, 515 nm, 633 nm, 780 nm, 830 nm, 1300 nm and 1550 nm.
The optics and high-precision opto-mechanics are incorporated into a compact housing, flexibly designed for post mounting at varying optical axis heights. P-polarized light is transmitted with minimal loss collinear to the input beam path while S-polarized light is reflected 90º. A removeable beam dump is included on the reflected beam port, transforming the VA-CB into a variable attenuator for the transmitted beam. M-4 and 8-32 mounting threads are included on the opposite side and bottom of the housing. This allows for various polarized output options. 
The motorized versions of the VA-CB series come with a motorized rotary stage containing the half-waveplate. Software is included which allows the user to calibrate one port of the VA-CB.


新港的VA-CB系列可变分束器为特定波长的CW激光器提供连续的分束或衰减。VA-CB系列用于提供线性偏振光的高对比度光束分裂。电动版可用于开环或闭环操作。

基于零阶半波板和激光线偏光立方分束器的VA-CB高能系列。这些分束器设计用于处理波长不超过2mw /cm2CW的高能脉冲激光输入，1 J/cm2，波长固定，包括442 nm、488 nm、515 nm、633 nm、780 nm、830 nm、1300 nm和1550 nm。

光学和高精度光学力学结合到一个紧凑的外壳，灵活设计后安装在不同的光轴高度。P-polarized光传播以最小的损失共线的输入光束路径而S-polarized光反映90º。反射波束端口包括一个可拆卸的波束转储，将VA-CB转换为传输波束的可变衰减器。M-4和8-32安装螺纹包括在外壳的另一侧和底部。这允许各种极化输出选项。

VA-CB系列的电动版本带有一个装有半波板的电动旋转台。软件允许用户校准VA-CB的一个端口。