Search found 100 matches
- Sat Jul 08, 2023 7:15 am
- Forum: #DevOptical
- Topic: Software, Recommendations, Optics and Optomechanical, Design and Simulation
- Replies: 3
- Views: 6872
Re: Software, Recommendations, Optics and Optomechanical, Design and Simulation
The industry standard for optical design are either ZEMAX/ANSYS OpticStudio or CodeV but these software are pretty expensive. They don't advertise the price on their websites (on request only) but based on personal experience you can expect a price tag of either 3k€/yr and 6k€/yr for OpticStudio dep...
- Fri Jul 07, 2023 3:45 pm
- Forum: OpenRAMAN
- Topic: Ghost data in buffer
- Replies: 7
- Views: 7233
Re: Ghost data in buffer
different origin are possible but I'm thinking of those two first: stray light in the room, in particular if you use fluorescent lamps or if your setup is close to a computer monitor or TV hot pixels; some pixels will have higher response than others In both case you can compensate by using a blank ...
- Sat Jul 01, 2023 7:21 am
- Forum: OpenRAMAN
- Topic: Raman Thermometer
- Replies: 13
- Views: 11130
Re: Raman Thermometer
It's pretty noisy and there is a large influence of the laser itself.
I checked to reproduce your experiment but using a notch filter to remove the laser line but unfortunately it's horribly expensive (>$500 at Thorlabs)...
Can't you use peaks that are farther away from the laser line ?
I checked to reproduce your experiment but using a notch filter to remove the laser line but unfortunately it's horribly expensive (>$500 at Thorlabs)...
Can't you use peaks that are farther away from the laser line ?
- Mon Jun 26, 2023 1:43 pm
- Forum: OpenRAMAN
- Topic: Raman Thermometer
- Replies: 13
- Views: 11130
Re: Raman Thermometer
It's a bit oversaturated to tell for sure but it does indeed look like a main mode + some side lobes of the laser. Also, if you want to see anti-stokes peaks you have to replace the dichroic mirror by a 50:50 beam splitter. The dichroic will prevent light below 540~550 nm from reaching the sensor an...
- Thu Jun 22, 2023 4:43 pm
- Forum: OpenRAMAN
- Topic: Raman Thermometer
- Replies: 13
- Views: 11130
Re: Raman Thermometer
That looks very interesting -- thank you for popping it up I'd be particularly interested in gaining more information on peak broadening with temperature because I'm pretty much convinced that the current resolution is limited by the experiment and not so much by the spectrometer itself. nb: you won...
- Fri Jun 16, 2023 4:08 pm
- Forum: OpenRAMAN
- Topic: base plate manufacturing
- Replies: 5
- Views: 2741
Re: base plate manufacturing
It's mostly a question of stiffness, damping and resilience even at very high fill ratio. For some applications it's ~okay~ but for demanding application it typically catch a lot of vibration which produces blurry images; I've also found that with time it tends to move/live which induce de-alignemen...
- Wed Jun 14, 2023 10:07 am
- Forum: OpenRAMAN
- Topic: base plate manufacturing
- Replies: 5
- Views: 2741
Re: base plate manufacturing
In 2019 I got mine from Materialize at 80€ (SLS). 250 looks more like CNC machining or did the price just became crazy?
- Fri Jun 09, 2023 4:43 pm
- Forum: OpenRAMAN
- Topic: Bright Isopropanol
- Replies: 6
- Views: 3688
Re: Bright Isopropanol
The second one is fluorescence for sure.
Can you try now to set the gain to zero and try and exposure time of ~10 sec ? If the image is still white, decrease the exposure time by 50% until you get something that does not saturate. We should see some lines then.
Can you try now to set the gain to zero and try and exposure time of ~10 sec ? If the image is still white, decrease the exposure time by 50% until you get something that does not saturate. We should see some lines then.
- Wed Jun 07, 2023 5:06 pm
- Forum: OpenRAMAN
- Topic: Bright Isopropanol
- Replies: 6
- Views: 3688
Re: Bright Isopropanol
Based on the images I would rather orient to a mis-aligned system. What integration time & gain did you use ? Even at 100 ms you should be able to recognize the Raman emission but here it looks like you're just collecting background noise. Would you have the direct camera image to share with us ?
- Tue Jun 06, 2023 3:13 pm
- Forum: OpenRAMAN
- Topic: SpectrumAnalyzer New and/or Undocumented Feature DIscussion
- Replies: 4
- Views: 2766
Re: SpectrumAnalyzer New and/or Undocumented Feature DIscussion
Concerning the error you get, it's normal (well, sort of -- let me explain). SPC files have a very specific content structure where each byte in the file is coding for something (more about that here: https://www.thepulsar.be/article/implementing-object-persistence-in-c--/). Inside SPC files, you'll...