Optical Sectioning Techniques - Confocal Laser Scanning Mic - Two-photon Mic

3 important questions on Optical Sectioning Techniques - Confocal Laser Scanning Mic - Two-photon Mic

TP Mic is a laser scanning technique that...

Can excite and detect fluorescence deep inside opaque samples, multiple cell layers deep.

3 TP Mic advantages

1. Infrared light penetrates deeper  into tissues compared to visible light.
2. No excitation and out-of-focus photobleaching
3. No need for pinholes to block out-of-focus light.

2 TP Mic disadvantages

1. More complex pulsed layers are needed tat deliver a high instantaneous intensity
2. More photobleaching due to high intensity lasers

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