Search found 121 matches

by Luc
Wed May 03, 2023 11:20 am
Forum: OpenRAMAN
Topic: Calibration
Replies: 23
Views: 15931

Re: Calibration

Could you try with acetone instead ? If you used denaturated ethanol (the blue stuff) you may get plenty of fluorescence signal from the additives.
by Luc
Wed May 03, 2023 11:18 am
Forum: OpenRAMAN
Topic: Materialise 3-D Printed Parts
Replies: 13
Views: 7399

Re: Materialise 3-D Printed Parts

One user did succeed with FDM but personally I recommend SLS for structural parts, or even better CNC machining in Al 6061 or equivalent if you can afford it.
by Luc
Mon May 01, 2023 2:21 pm
Forum: OpenRAMAN
Topic: Beginner’s assembly tricks : Solid add-on + GalaxyView + Neon calibration
Replies: 4
Views: 3241

Re: Beginner’s assembly tricks : Solid add-on + GalaxyView + Neon calibration

Thank you very much for your detailed feedback Karel! I liked the idea of using the solid cuvette to re-image the light on the slit; that's less tooling required :) I think you also mentioned me that your Daheng camera is limited in 1 sec exposure time. It's the same with mine (different sensor, it'...
by Luc
Wed Apr 26, 2023 5:36 pm
Forum: OpenRAMAN
Topic: Materialise 3-D Printed Parts
Replies: 13
Views: 7399

Re: Materialise 3-D Printed Parts

They seem to have drastically increased their price... you may want to check the price of CNC machining in POM/acetal/delrin at that level. Photoresin has much higher resolution than SLS which is required for that part. You can try in SLS but I don't think you'll get a clean groove for the o-ring. I...
by Luc
Tue Apr 25, 2023 12:23 pm
Forum: OpenRAMAN
Topic: Materialise 3-D Printed Parts
Replies: 13
Views: 7399

Re: Materialise 3-D Printed Parts

You can ask for the support marks to be removed

stereolitography is a bit like filament in that regards, you need posts/support for the print and they need to be removed after
by Luc
Sat Apr 22, 2023 8:13 am
Forum: OpenRAMAN
Topic: Materialise 3-D Printed Parts
Replies: 13
Views: 7399

Re: Materialise 3-D Printed Parts

The LD clamp should be stereolitography :) It's a process where you can get much thinner details and the parts look a lot like molded injection parts. The only downside is that they are very brittle (just like glass) so never try to rework them with anything else than sandpaper. For the LD clamp it ...
by Luc
Wed Apr 19, 2023 5:58 pm
Forum: OpenRAMAN
Topic: Materialise 3-D Printed Parts
Replies: 13
Views: 7399

Re: Materialise 3-D Printed Parts

I confirm.

PS: did I write FMJ in the BOM or MJF? FMJ would be Full Metal Jacket, a typo :D
by Luc
Sun Apr 16, 2023 5:10 pm
Forum: OpenRAMAN
Topic: Spectral resolution of spectromter?
Replies: 4
Views: 3102

Re: Spectral resolution of spectromter?

The total range on openraman is about 110nm (550 nm to 660nm approximately) : 1/550 - 1/532 = 600 cm-1 1/660 - 1/532 = 3650 cm-1 With a slit size of 20 um and a compression factor of cos45°/cos0° (grating configuration) the image on the camera is at best 14 um. In practice, it's a bit bigger due to ...
by Luc
Fri Apr 14, 2023 8:04 am
Forum: OpenRAMAN
Topic: Spectral resolution of spectromter?
Replies: 4
Views: 3102

Re: Spectral resolution of spectromter?

There are detailed posts on thepulsar.be about resolution but information is a bit spread among the various posts. In summary: resolution is defined as the ability to discriminate two nearby peaks provided the peaks broadness are not the limiting factor a good estimate of resolution is given by the ...
by Luc
Fri Apr 14, 2023 5:38 am
Forum: OpenRAMAN
Topic: Spectrum Analyzer Software
Replies: 2
Views: 2113

Re: Spectrum Analyzer Software

I just updated the links, it should be working now. The problem occurs with "http" links because some web browser like Chrome don't allow downloading from non https links. When I moved the website from http to https, I had to correct all the links and I missed some. If you find other broke...