Search found 99 matches
- Wed Feb 21, 2024 9:08 am
- Forum: OpenRAMAN
- Topic: Alignment Question
- Replies: 9
- Views: 852
Re: Alignment Question
I looked up on Internet to gather some data on this camera model and I found this page : https://vitalvisiontechnology.com/allied-vision-manta-g-145b-poe/ It's an old CCD sensor (ICX285) with a not-so-good light sensitivity. The website mentions an absolute detectivity threshold of 11 e- with a quan...
- Tue Feb 20, 2024 6:41 am
- Forum: OpenRAMAN
- Topic: Alignment Question
- Replies: 9
- Views: 852
Re: Alignment Question
Which camera model of the ProSilica are you using exactly? Exposure time is typically around ~10 seconds on the Starter Edition for precision measurement to fully expose the sensor and get the highest dynamic range but it's still possible to recognize spectra with lower exposure time, down to 100 ms...
- Mon Feb 19, 2024 10:22 am
- Forum: OpenRAMAN
- Topic: Alignment Question
- Replies: 9
- Views: 852
Re: Alignment Question
Hi, It is possible to use the camera software directly for the alignment. At which stage of the alignment process are you stuck ? Also, but that's more of a general remark, it is not recommended to use a color camera sensor because you are throwing away more than 75% of the signal when using a green...
- Sun Feb 11, 2024 12:04 pm
- Forum: OpenRAMAN
- Topic: Converting CCD Image to Raman Spectrum
- Replies: 1
- Views: 547
Re: Converting CCD Image to Raman Spectrum
I don't have any names on the top of my head but there are surely some. At the very least, you can use the Matlab code that I gave here : http://www.open-raman.org/build/breadboard/assembly/ The process of converting an image to a spectra is not very complicated and can be split into two steps: (1) ...
- Thu Feb 01, 2024 7:00 am
- Forum: OpenRAMAN
- Topic: Open Raman Software Issue: Camera Not Detected
- Replies: 2
- Views: 940
Re: Open Raman Software Issue: Camera Not Detected
Hello, It's possible to add support for other camera brands but you need to make a program to "bridge" the functions from the SpectrumAnalyzer software to the camera own functions. I did it for Daheng cameras and it's a couple of days of work when you know what you're doing. It however req...
- Mon Jan 22, 2024 10:40 am
- Forum: OpenRAMAN
- Topic: Beginner in spectroscopy
- Replies: 1
- Views: 598
Re: Beginner in spectroscopy
Hello rama, That's a lot of questions -- I will try to answer them one by one. No questions are stupid btw and we're all here to help :) Generally speaking, professional Raman spectrometers are indeed expensive -- reason for which I started the OpenRAMAN project. On the other hand, you should not ne...
- Tue Nov 07, 2023 3:06 pm
- Forum: General
- Topic: Some questions about EC meter
- Replies: 2
- Views: 3735
Re: Some questions about EC meter
The idea of using a reference value was to compensate for small drifts in the amplitude of the applied sine wave.
I haven't test without it but when I designed the circuit I wanted to be safe and included as baseline.
I haven't test without it but when I designed the circuit I wanted to be safe and included as baseline.
- Mon Oct 09, 2023 4:19 pm
- Forum: Autocollimator
- Topic: Parts list
- Replies: 1
- Views: 4534
Re: Parts list
The people from Strathclyde were kind enough to make a text version of the list at the bottom of the page here:
https://focalplane.biologists.com/2022/ ... f-systems/
https://focalplane.biologists.com/2022/ ... f-systems/
- Thu Aug 03, 2023 1:50 pm
- Forum: OpenRAMAN
- Topic: Raman Thermometer
- Replies: 13
- Views: 10973
Re: Raman Thermometer
The generic background correction method is not ideal for quantitative work.
The easiest is to export the raw spectrum in csv and, using Matlab or excel, remove a slanted line at the base of the peak. It works very well for isolated sharp peaks but it's more tricky for broader peaks.
The easiest is to export the raw spectrum in csv and, using Matlab or excel, remove a slanted line at the base of the peak. It works very well for isolated sharp peaks but it's more tricky for broader peaks.
- Sat Jul 22, 2023 7:03 am
- Forum: OpenRAMAN
- Topic: Signal to noise calculation
- Replies: 2
- Views: 2193
Re: Signal to noise calculation
There are two variables that can be used to define the noise of a spectrograph which are often mixed up. Here is a bit of clarity in that mix: Signal to Noise Ratio (SNR) which is technically how much noise is contained in every pixel of your data. To obtain it you typically take at least 10 spectra...