Hi I am trying to make 500mW IR laser pointer. I ordered LCU80E041A diodes. and 9-18-21mm lenses.
I believe I successfully drive the diode. But when I focus the beam to a 30m target the spot that I get is not a dot. It is a line (1/8 rectangle). I think that it is the image of the radiating junction.
When I illuminate a 3-4 km distant building I get huge 2-3m long spot (line)
How can I get smaller and more circular or near square spot?
I have ordered this anamorphic lens . It's on the way ... but I'm not sure that it will be a solution.
Any suggestions?
Regards,
Buyucu
I believe I successfully drive the diode. But when I focus the beam to a 30m target the spot that I get is not a dot. It is a line (1/8 rectangle). I think that it is the image of the radiating junction.
When I illuminate a 3-4 km distant building I get huge 2-3m long spot (line)
How can I get smaller and more circular or near square spot?
I have ordered this anamorphic lens . It's on the way ... but I'm not sure that it will be a solution.
Any suggestions?
Regards,
Buyucu