Recent content by monika

Hi guys As far as I can see beam expanders change the size and divergence of a laser. Collimators collimate the light. One article I read claims "Beam expanders improve a beam’s collimation" so my question is why do we have both items if beam expanders can collimate beams????? What are the...

Well, all of them really. I'm trying to find out how each particular sensor works, whether it be light or temperature or however they work. The pros and cons of each type of sensor; what makes them best suited fro a particular application etc.... I could have sworn at some point there was an...

I don't have a LPM rather I'm just trying to understand a little bit more about them. Some of them seem to be using thermopiles which convert heat to electricity. If this is the case if a beam is 3mm dia or 1mm dia they will have different power densities and I'm assuming different thermal...

From what I understand this is the energy per area so if a power meter provides the same power reading regardless of area, is there such a thing as a power density meter or is this only calculable? There are circumstances where it is desirable to know the power density, so I guess there must be...

Hi guys, Doe a power meter differ in reading if the beam size is different or does it compensate for this? ie if I shine a 30mw laser at a power meter which has a 3mm dia beam will I get the same power reading if the beam was 1mm dia. Thanks :)

Hi, Is it possible to focus a laser to say a 0.1mm spot over a number of meters? How would the optics look for this? I'm looking to take some precise measurements and wonder what optics and how they are set up to achieve this. Thanks for your help.

Thanks guys very much for your replies, it is appreciated :thanks: This got me thinking a bit more about the shape and focussing of a laser beam. I'm not sure whether I am correct in this assumption, that a laser beam is essentially collimated light so taking into account divergence the beam...

Hi guys, I am trying to understand a bit more about lasers and have come up with some questions which I hope some of you can help with. 1) I there any relationship between wavelength and power? For example is a 1W 808nM any more or less powerful than a 1W 980nM laser? 2) What defines power...