Posted in | Fluorescence

DIM and PULSE options for the NIGHTSEA Stereo Microscope Fluorescence Adapter

The standard Model SFA Stereo Microscope Fluorescence Adapter has a simple ON/OFF switch. This is adequate for most customers, who want the maximum excitation intensity so that they see maximum fluorescence from their samples. There are some cases, however, where more control of the lamp output is needed. In some cases users want to be able to fine tune the intensity, and in others they want to be able to turn the excitation light on and off with precise timing, such as for photoactivation or for behavioral experiments. Two options, DIM and PULSE, add these capabilities.

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.

The PULSE option adds a BNC connector on the rear of the base that accepts a user-supplied voltage input from a computer, function generator, or the like to turn the excitation light on and off. It can be used for precise on/off control, or it can be used as a dimmer by varying the duty cycle of a square wave (PWM – Pulse Width Modulation).

Run Time - 2:19

DIM and PULSE options for the NIGHTSEA Stereo Microscope Fluorescence Adapter

Other Videos by this Supplier

Tell Us What You Think

Do you have a review, update or anything you would like to add to this video content?

Leave your feedback
Your comment type

Materials Videos by Subject Matter

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.