What I made from the UK Group buy

[andythemechanic]

Hi everybody,

last week the LOC's from the UK group buy arrived, simulatenously with Lasorbs and my new Proxxon MF 70 micro milling machine. Time do build a nice red module for my new projector! Voila! Here some nice pictures:

Combining of the beam is done via the mirror out of the diode sled and a custom 10x10x9mm flexure mount. I tried to make it as small as possible but it still could be smaller. For Version two I have some ideas to make it even smaller. Version two will then be combined with 2x150mW @642nm via PBS. This will give 700mW of combined red .

Greetings
Andreas

[mccarrot]

Nice, are you able to do power measurements?

If so could you measure the loss of the mirror?

[badger1666]

nice job andy what lens did you use ?
i wish i has a decent mill i could have a shit load of fun

here's a pic of my efforts so far dual blu-ray and dual loc reds 800mw's so far just got to get a couple of small green's to complete the rgb modual

[andythemechanic]

I measured transmission spectrum trough the mirror at normal incidence at work last week. I don't have the data here but can bring it tommorow. When I rememer correctly, transmission was less then 1% @650nm. I can also measure the power loss directly at 45° but only at work. Maybe at the end of next week or the weekend.

[andythemechanic]

nice job andy what lens did you use ?
i wish i has a decent mill i could have a shit load of fun

here's a pic of my efforts so far dual blu-ray and dual loc reds 800mw's so far just got to get a couple of small green's to complete the rgb modual

I used collimators from Marco, he is also here on the forum. He offered them in this thread: http://www.photonlexicon.com/forums/...nd-collimators
The proxxon MF 70 mill is really cool and cheap, only 240 euros. It is a bit small and you need a lot of time for milling big areas.

[badger1666]

Nice, are you able to do power measurements?

If so could you measure the loss of the mirror?

looks like he is using the sled mirror and on my dual setup i only lost 10mw with the diode pushing out 240mw would be interesting to see what he is loosing


and he replys while i am posting lol

[MisterWilling]

I did some measurements using the same mirror and diode. I was getting between 98% and 99% reflectance at 45 degrees.

[andythemechanic]

Ok here is the measured reflectivity of the Mirror from the LPC815 Sled at normal incidence. Measured with a Perkin & Elmer Lamba 900 Spectrometer in Transmission. Reflectivity is calculated assuming no loss as 100%-Transmission. This should be a good assumption as long as the surface is clean and does not scatter. Because it is measured in normal incidence for 45° incidence the spectrum will shift ca. 50nm to the blue and the dip @ 650 nm will be at ca. 600nm. The mirror should be well usable between 600 and 700nm then.

Andreas

[daedal]

Ok here is the measured reflectivity of the Mirror from the LPC815 Sled at normal incidence. Measured with a Perkin & Elmer Lamba 900 Spectrometer in Transmission. Reflectivity is calculated assuming no loss as 100%-Transmission. This should be a good assumption as long as the surface is clean and does not scatter. Because it is measured in normal incidence for 45° incidence the spectrum will shift ca. 50nm to the blue and the dip @ 650 nm will be at ca. 600nm. The mirror should be well usable between 600 and 700nm then.

Andreas

Thank you very much for this info

--DDL

[mccarrot]

Wow thats a nice mirror, thanks for testing!