distance measuring with Laser

Hey everyone, so i was wondering, how can I creat a sensor to measur distance with Laser ? what do I need for that purpose ? the ultrasonic sensor range is 4m and I need like 10 meters .. I know how it is supposed to measure distance, D=V*t. V it's the speed of light, and for "t" I have to use a reflector but how can I get it ? thank u everyone :confused:

To do what you ask, you need to modulate the laser so you can time the output vs the return echo, just like the ultrasonic. Many devices use a rotating mirror. Others pulse the laser on-off.

Paul

The Arduino compatible Lidar Lite V3 works extremely well, and is really worth the price. Measures up to 40m with +/- 1 cm accuracy.

Video of internal scan of a church using the Lidar Lite.

Paul_KD7HB: To do what you ask, you need to modulate the laser so you can time the output vs the return echo, just like the ultrasonic. Many devices use a rotating mirror. Others pulse the laser on-off.

Paul

thank you for the reply ! Okay, now I know from where should I start ! can u help me with that if I got stuck :)