Gabor A M, Landreth B, Moddel G
Appl Opt. 1993 Jun 10;32(17):3064-7. doi: 10.1364/AO.32.003064.
We describe the integrating-mode operation of an optically addressed spatial light modulator that incorporates a ferroelectric liquid-crystal light-modulating layer and an amorphous-silicon photodiode. This mode of operation uses a higher drive frequency and produces a readout response that extends over several driving periods, thereby permitting cw operation. The response characteristics of the device can be adjusted by varying the amplitude and offset of the applied voltage. Spatial resolution of 40 line pairs/mm, response times of 1 ms, and contrast ratios of 30:1 were achieved in this mode. We compare the integrating mode of operation with our standard reset mode of operation, whereby the electrical driving frequency is sufficiently low that the liquid crystal can respond fully to the voltage level during each part of the drive, and the device is reset fully to its off state during the forward-bias part of each electrical bias period.
我们描述了一种光学寻址空间光调制器的积分模式操作，该调制器包含一个铁电液晶光调制层和一个非晶硅光电二极管。这种操作模式使用更高的驱动频率，并产生一个跨越多个驱动周期的读出响应，从而允许连续波操作。通过改变施加电压的幅度和偏移量，可以调整器件的响应特性。在这种模式下，实现了40线对/毫米的空间分辨率、1毫秒的响应时间和30:1的对比度。我们将积分模式操作与我们的标准复位模式操作进行了比较，在标准复位模式中，电驱动频率足够低，以至于液晶在驱动的每个部分都能对电压电平做出充分响应，并且在每个电偏置周期的正向偏置部分，器件被完全复位到其关闭状态。
