How does a Laser Range Finder work?

[ColdFire]

Hi All,

Can anyone tell me how a range finder using laser works? Is there any working project around for reference. Thank you.

Regards

 

[techie]

Laser Range Finder

I think the laser in a rangefinder is only for pointing purpose. The range is measured by ultrasonic transceiver by measuring the time sound takes to travel to and fro.

 

[conkhicon]

Re: Laser Range Finder

https://www.philohome.com/sensors/lasersensor.htm

 

[artem]

Re: Laser Range Finder

h**p://www.philohome.com/sensors/lasersensor.htm

that one is just to detect presence of object and no range info is provided .

 

[bilgekaan]

Re: Laser Range Finder

Yes , right , laser is used for pointing.But I don think that sound is used. it is very difficult to focus sound to pointed target.Range is calculated from reflecting angle of laser beams.

I saw an sample project ( laser range finder ) on Servo MagazineBut i am not sure the number of issue.Simple range finder made with laser pointer and a webcam.

You can download servomagazin from www.elektrotekno.com site under ebooks section.
http://www.elektrotekno.com/about288.html

 

[VSMVDD]

Re: Laser Range Finder

yes lasers are used for ranging also

the method is to send a phase locking data carrier and measure
the minute differance in reply timings....
using regenarative sample and hold

as a point to note
these devices are class 2 laser products
military... in nature
so i think your hopefull to find circuits

and maybe if you do some mib will arrive with a flashy thing

 

[bilgekaan]

Re: Laser Range Finder

another project i found after quick google search