2025-07-15 5:45 AM
Hi, I'm experimenting with VL53L4ED. it suits by requirements except that is has only 18° FoV. Is there any way to increase the FoV (upto120°) using a lens may be without hampering the laser class?
Solved! Go to Solution.
2025-07-15 11:10 AM
Well technically I guess you could as long as you spread the light farther. Narrowing the beam is dangerous. Please do not attempt that - unless you have a laser expert standing by.
But it's not a good idea for several reasons.
That squirt of light is tiny. Any more and you have safety issues. But if you spread that light to 120 degress there would be so few photons hitting something and you would get no return signal. Unless of course the target were very close - in which case you didn't need the wide FoV.
Now that i'm retired, selling more parts is not an objective, but I think it's your only way out.
The VL53L7 has a wider FoV (60 degrees square) but ST has not tested it at the silly high temperatures of the VL53L4ED. I'm sure it would work - but the accuracy and distance gets worse and worse with temperature.
It's my professional opinion that messing with the FoV won't pay, and could be dangerous.
Better to find a different approach.
- john
2025-07-15 11:10 AM
Well technically I guess you could as long as you spread the light farther. Narrowing the beam is dangerous. Please do not attempt that - unless you have a laser expert standing by.
But it's not a good idea for several reasons.
That squirt of light is tiny. Any more and you have safety issues. But if you spread that light to 120 degress there would be so few photons hitting something and you would get no return signal. Unless of course the target were very close - in which case you didn't need the wide FoV.
Now that i'm retired, selling more parts is not an objective, but I think it's your only way out.
The VL53L7 has a wider FoV (60 degrees square) but ST has not tested it at the silly high temperatures of the VL53L4ED. I'm sure it would work - but the accuracy and distance gets worse and worse with temperature.
It's my professional opinion that messing with the FoV won't pay, and could be dangerous.
Better to find a different approach.
- john