What Is High Blood Pressure? Blood pressure is the amount of force exerted by the blood against the walls of the arteries. A person's blood pressure is considered high when the readings are greater than 140 mm Hg systolic (the top number in the blood pressure reading) or 90 mm Hg diastolic (the bottom number).
You are here: Fiber optic light source is a fiber optic test equipment to measure the fiber optic loss for both single mode fiber cable and multimode fiber cables; usually the fiber optic light source is used with the fiber optic power meters.
If you are using a microscope, which can efficiently focus all the light into your eye, it should have infrared filters to reduce the danger of invisible infrared light. The infrared light in fiber optic links is at a wavelength that cannot penetrate your eye easily because it's absorbed by the water in your eyeball. Light in the 1300-1550 nm range is unlikely to damage your retina, but might harm the cornea or lens. A typical laser pointer, which has a beam that is collimated (not expanding), and is at visible wavelength (650 nm) where the eye is transparent, is probably more danger to the retina than a fiber optic link.