Metryq
0
- Joined
- Dec 28, 2014
- Messages
- 20
- Points
- 0
I just picked up a visual fault locator (VFL) for fiber optic work, and I have some questions about the device.
I realize the unit is meant to attach to the end of a fiber via its "universal" connector. However, when aimed at a surface a meter away, it produces a "rosette" pattern about 30cm in diameter, rather than a focused dot. Is this normal? Is it deliberate to diffuse the light around the interior of the fiber?
The label is very bizarre. It says "invisible laser radiation," yet it is a visible red laser. Does this use a DPSSL type arrangement? The warning label also states "excimer laser" :wtf: and "class I laser product."
That "class I" rating also confuses me because the label next to the warning tag states that the frequency is 650nM (red) and—get this— "P≥25mW". Greater than, or equal to? Not if it's class I.
I realize the unit is meant to attach to the end of a fiber via its "universal" connector. However, when aimed at a surface a meter away, it produces a "rosette" pattern about 30cm in diameter, rather than a focused dot. Is this normal? Is it deliberate to diffuse the light around the interior of the fiber?
The label is very bizarre. It says "invisible laser radiation," yet it is a visible red laser. Does this use a DPSSL type arrangement? The warning label also states "excimer laser" :wtf: and "class I laser product."
That "class I" rating also confuses me because the label next to the warning tag states that the frequency is 650nM (red) and—get this— "P≥25mW". Greater than, or equal to? Not if it's class I.