夜间立体显微镜荧光适配器的昏暗和脉冲选项

标准型号SFA立体显微镜荧光适配器具有简单的开/关开关。对于大多数想要最大的激发强度的客户来说，这是足够的，以便他们从样品中看到最大的荧光。但是，在某些情况下，需要对灯输出进行更多控制。在某些情况下，用户希望能够微调强度，而在其他情况下，他们希望能够以精确的时机（例如光激活或行为实验）来打开和关闭激发灯。两个选项，昏暗和脉搏，添加这些功能。

The DIM option adds a combined switch and dimmer control. When you first turn the unit on it is at full power. As you rotate the switch the intensity decreases, reaching ~30% at the minimum setting. You have finer control in the brighter portion of the adjustment range. We originally added this for an industry customer who had a sample with a fluorescence of interest along with a weaker background fluorescence of the same color. They found that when they decreased the excitation intensity the eye perceived the background fluorescence as decreasing faster than the signal intensity, producing higher contrast.

脉冲选项在基础后部添加了BNC连接器，该连接器接受了从计算机，功能发生器或类似的用户提供的电压输入，以打开激发灯打开和关闭激发灯。它可以用于精确/关闭控制，也可以通过改变方波的占空比来用作调光器（PWM – Pulse Width Modulation）。

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