7 colour hand held pointer/spiro

[rog8811]

Thankyou, I will look at my work diary tomorrow.

Regards rog8811

[andy_con]

im expecting you there

[Psi]

I have no clue why the green works (may be something to do with being IR pumped?), all I do know is it would not work in any position around the sled, I have used a different sled for another, smaller, build and produced the following drawing of the positions where the lasers worked.

I would just point out that although the positions worked out OK the optics didn't, once I allowed the beam out of the end of the sled I discovered that the mirror only reflected 50% of the blu ray and split the green into 3 beams.

Regards rog8811

Thanks for that,
Did you get the green splitting into 3 beams in your first build?
How did you solve it or is it not noticeable?

Beam splitter prisms don't have to be very wavelength-specific. In a polarizing beam splitter the split is made using birefringent materials, which can work over a wide range of frequencies. They will always be most efficient at their design frequency, but they'll still work a good way out.

Thanks

Also, I feel it would be remiss of me not to point out that purple and violet are different things. Purple is a mix of red and blue. Violet is a colour beyond blue.

ah, that actually makes a lot of sense. I've always wondered why people kept using the word violet to represent a colour i'd call more purple than violet. I thought it was just a language thing between countries. hehe
Thanks for explaining that.

[allthatwhichis]

Purple is a mix of red and blue. Violet is a colour beyond blue.

Purple is a mix of red, blue, and violet...

[rog8811]

Did you get the green splitting into 3 beams in your first build?
How did you solve it or is it not noticeable?

No, on the first build the optics worked perfectly as they were as it only uses splitter cubes.
On the second one, as well as using a cube, I needed to use the dichro but the standard one in the PHR 803T sled is just too clever by far, I have sorted it out though.

Regards rog8811

[Psi]

No, on the first build the optics worked perfectly as they were as it only uses splitter cubes.
On the second one, as well as using a cube, I needed to use the dichro but the standard one in the PHR 803T sled is just too clever by far, I have sorted it out though.

Regards rog8811

Did your first build use the KES-400A sled ?

[rog8811]

Did your first build use the KES-400A sled ?

Yes, the KES 400A turned out to be the perfect sled for my first try just because all the optics worked together so well. It was one of only 2 types of sled I had at the time, it is probable that there are other sleds that have been butchered for LD's would work as well.

Regards rog8811

[maxh]

In the kes-400a sled you say both blocks are PBS cubes. The first one combines the red and violet because they're both polarized and you send the red through, and bounce the violet off. The exiting beam is magenta-ish and enters the next cube. But, the beam consists of the red and violet with polarizations at 90 degrees to eachother. So should't only one of the beams (red or violet) pass through the cube while the other is mostly reflected? Or is it something other than a PBS cube?

Also, you allude to making the phr-803t sled work after at first the dichro in it was causing problems with the green. Would you please elaborate?

[rog8811]

TBH I have no clue what the 2 cubes in the KEs sled are, all I can say is they work...

Also, you allude to making the phr-803t sled work after at first the dichro in it was causing problems with the green. Would you please elaborate?

The PHR-803T dichro reflects 100% red and 50% blu ray (the rest of it dissapears into a little hole in the side of the housing)
The green, going through the dichro, was split into 3 beams when it emerged from the other side. I replaced the dichro with a different one and it works fine now.
I am literally just off to the airport to fly off for 2 weeks, if you want more info it will be a while coming I am afraid....

Regards rog8811

[maxh]

TBH I have no clue what the 2 cubes in the KEs sled are, all I can say is they work...



The PHR-803T dichro reflects 100% red and 50% blu ray (the rest of it dissapears into a little hole in the side of the housing)
The green, going through the dichro, was split into 3 beams when it emerged from the other side. I replaced the dichro with a different one and it works fine now.
I am literally just off to the airport to fly off for 2 weeks, if you want more info it will be a while coming I am afraid....

Regards rog8811

Oh no, not quite yet! Did the replacement dichro come from a sled? If so, which?