Search found 101 matches
- Wed Mar 29, 2023 5:44 am
- Forum: OpenRAMAN
- Topic: Interesting other forum threads on low-cost raman
- Replies: 3
- Views: 2079
Re: Interesting other forum threads on low-cost raman
They also look alot like the ScienceSurplus spectrometer that I tested a few years ago. nb to save extra $$$ in your design, replace directly the rotation mount with the slit by a regular mount with the fiber connector -- the fiber core diameter will act as a slit (use a 20-50 microns core depending...
- Mon Mar 27, 2023 2:17 pm
- Forum: OpenRAMAN
- Topic: invalid node error during connect to camera in Spectrum Analyser
- Replies: 32
- Views: 19475
Re: invalid node error during connect to camera in Spectrum Analyser
I confirm that it is coming from a portion of the code that should never trigger (fail safe). For some reason, one of the mandatory parameter of the camera (exposure, gain, ROI...) cannot be accessed. Before we go further into the debug, I will ask you to perform a few operations and tell me if it's...
- Mon Mar 27, 2023 5:28 am
- Forum: OpenRAMAN
- Topic: invalid node error during connect to camera in Spectrum Analyser
- Replies: 32
- Views: 19475
Re: invalid node error during connect to camera in Spectrum Analyser
Could you run the program evemon.exe first, then launch spectrumanalyzer and try to reproduce the bug? It should give you a detailed log of everything happening. From the name it looks like it's trying to access something that doesn't exist in the camera. I'll check in more depth when I'm in front o...
- Sun Mar 26, 2023 12:36 pm
- Forum: OpenRAMAN
- Topic: Review of cheap $35 532nm Laser
- Replies: 1
- Views: 1686
Re: Review of cheap $35 532nm Laser
Nice report Andy! If you start digging into the world of laser for demanding applications like Raman or interferometry, you will want to invest in a high-resolution spectrometer like the one I built : https://www.thepulsar.be/article/high-resolution-spectroscopy With it, you can investigate the curr...
- Tue Mar 21, 2023 3:09 pm
- Forum: OpenRAMAN
- Topic: Cheapest possible "toy" spectrometer? $323
- Replies: 15
- Views: 7067
Re: Cheapest possible "toy" spectrometer? $323
It's a question of tradeoff as always. But here are a few things to consider: non back-scattering setups require more alignments per sample. with solid it might be ok if you have a lot of subsurface scattering but with liquid it's going to be really painful. My first liquid cuvette was actually a 90...
- Mon Mar 20, 2023 5:21 pm
- Forum: Autocollimator
- Topic: Cancelling the ghost image
- Replies: 0
- Views: 6117
Cancelling the ghost image
The initial version of the autocollimator suffers from a ghost image which is 1/4th of the intensity of the main signal: autoco ghost.png It originates from a reflection on the chrome-on-glass target which is reflective. Because of the beamsplitter, the ghost signal is attenuated by a factor (1/2)² ...
- Mon Mar 20, 2023 6:30 am
- Forum: OpenRAMAN
- Topic: SpectrumAnalyzer.sln build errors
- Replies: 2
- Views: 1403
Re: SpectrumAnalyzer.sln build errors
I was able to track it down. It's due to C++ compliance changes of Visual Studio from version 2015 to the more recent ones. Hopefully there is a quick fix! Right click on the project and select Properties > C/C++ > Language and change "Conformance Mode" to "No (/permissive)". It ...
- Sun Mar 19, 2023 6:49 pm
- Forum: OpenRAMAN
- Topic: Photos of your build
- Replies: 8
- Views: 6021
Re: Photos of your build
Interesting comment about the camera bracket. Did you check if the diameter (before drilling) matched the one in the drawing ? I'm asking because recently I made a mod to use a NAVITAR 35 mm objective. The technical drawing mentioned something like 32.4 mm so I designed the part accordingly (it's a ...
- Sun Mar 19, 2023 6:39 pm
- Forum: General
- Topic: Introduce yourself!
- Replies: 6
- Views: 4009
Re: Introduce yourself!
Welcome Andy and thank you for your active enthusiasm with the project! I would love to hear about your experiments with chromatography as it's something I wanted to investigate since I was a student (my only experience of chromatography was basically to look at an operator saying "don't touch ...
- Sun Mar 19, 2023 1:53 pm
- Forum: General
- Topic: Rules for submitting work/improvements
- Replies: 0
- Views: 11367
Rules for submitting work/improvements
The Pulsar Engineering is a non-profit organization dedicated to promote science through open-hardware instruments. As a consequence, the "open-source" concepts are an essential part of our work. We strongly encourage people to share here their own modifications/improvements of our project...