LED light source
The OptoLED is our flagship system for LED illumination.
Recent developments in Light Emitting Diode [LED] technology have yielded devices that are both brighter and capable of operating at more different wavelengths than their predecessors.
Combining these devices with closed-loop feedback control from our OptoLED has key advantages in live-cell recordings where short and long term intensity variations can be a problem with alternative light sources. The ultra-high stability and “instantaneous” (sub-microsecond) vibration-free switching and intensity modulation are valuable in a wide range of applications such as combined imaging and electrophysiology, voltage sensitive dye studies and high-speed tracking. The facility to “gate” the light source directly from the camera and thus only expose the specimen whilst the camera is integrating helps to reduce photo-bleaching / photo-damage and also prevents bleedthrough during frame readout or rolling shutter artefacts. Ultraviolet and white LEDs are also available for uncaging applications and brightfield illumination. The rapid modulation and ability to accurately define independent illumination areas for different wavelengths makes the OptoLED the ideal source for Optogenetics. The power supply allows devices to be transiently overdriven to 5A to give increased optical intensity whilst fully protecting the LED from damage.
Independent analysis and internet blog
The range of wavelengths available from ultra-bright LEDs covers the absorbance peaks of most fluorescence indicators and Optogenetic tools. The table below shows the standard range, however we can also source more specialist devices on request.
Depending on the combination of wavelengths required we can combine two or more devices using dichroic mirrors. Please contact Cairn for recommendations on the best LEDs and filters for your experiments.
LEDs are available in 355nm*, 365nm, 385nm, 405nm, 440nm (white LED), 455nm, 470nm, 490nm, 505nm, 525nm, 550nm (white LED), 565nm, 590nm, 617nm, 627nm wavelengths.
*post-filter feedback of 365nm LED allows stable output at 355nm
LED Head Upgrade
With LED technology constantly improving we would like to remind existing customers that we are able to upgrade your current LED heads for a small charge of £100.
The way in which our LED heads are designed means they are readily interchangeable so if returned to us we can upgrade in a very short period of time.