I bought a laser pointer, and I dismantled it to get the laser diode (including it's circuit).
I was thinking if it's possible to use the laser diode to calculate distance between the laser diode and some object ?
I would probaly need to record the feed back time, but the speed of light is very fast, so the time will be extremely short...
I know there are devices out there that do this, but can it be done using a laser diode ?
Anyone knows how it's done ?
[Edit]
Also, is there a laser pointer with invisible light ? (not in the huma's vision spectrum)
I know that laser pointers are very dangerous to the eyes, so I don't want to make anyone (or myself) blind while playing with it...
Also...
Is there a photo resistor that is like a laster (or opposite of later) to read the light from only one direction ? Because if I am to read the laser feedback, I don't want to read any other light from other sources.
I was thinking if it's possible to use the laser diode to calculate distance between the laser diode and some object ?
I would probaly need to record the feed back time, but the speed of light is very fast, so the time will be extremely short...
I know there are devices out there that do this, but can it be done using a laser diode ?
Anyone knows how it's done ?
[Edit]
Also, is there a laser pointer with invisible light ? (not in the huma's vision spectrum)
I know that laser pointers are very dangerous to the eyes, so I don't want to make anyone (or myself) blind while playing with it...
Also...
Is there a photo resistor that is like a laster (or opposite of later) to read the light from only one direction ? Because if I am to read the laser feedback, I don't want to read any other light from other sources.