Green Laser test

[The_LED_Museum]

<P>GP-5 green laser pointer shot at a building approximately 1 mile away. This is the most distant laser test target I have ready access to. Note the green beam visible coming in from the right. <P>Taken about 1/2 hour after sunset (9:45pm Pacific); it wa sstill light enough outside to easily read fine newsprint. Target building has an albedo of only around (edit) 50 to 55 (Grey); if it were white, the spot would *really* be spectacular.

 

[rycen]

I gotta get one of those COOL!

 

[**DONOTDELETE**]

Craig,

What was the focal length of the lens?
Of the camera you took the photo with.

 

[The_LED_Museum]

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by toby:
[QB]What was the focal length of the lens?
QB]<HR></BLOCKQUOTE>

According to the camera the lens is part of, it's 115mm.

 

[yclo]

Oh, how do you work out the output power with a solar cell? You said there're calculations involved?

YC