[time-nuts] Wide angle light into ST connector/multimode fiber?
hmurray at megapathdsl.net
Tue Jan 4 20:04:40 UTC 2011
> I want to get light from a wide angle (30 degrees or so) into a multimode
> fiber cable to feed a fast MF466 photodiode for short distance sensing.
> That fiber is really small to focus on. Anyone done this...looking at a
> reflection of a red laser diode flashing dot a couple of meters away
> through fiber?
It won't work. I'm not smart enough to explain the physics.
In addition to the diameter of the fiber, there is also an acceptance angle.
You can probably measure it by shining light into one end of the fiber and
holding the other end far enough away from a white sheet and measuring the
These are my opinions, not necessarily my employer's. I hate spam.
More information about the time-nuts