FAQ

Most frequent questions and answers

There are several differences between them: sensitivity, resolution, used software, noise level. Mini Spectrometer is a low cost, sensitivity and based on opensource software unit. It has a slit (90 um) as an opening to get the light in. The SMA Spectrometer is 120 times more sensitive than the Mini. It has better optics and resolution characteristics. It is driven by a research-grade software (free for noncommercial use). Also, the SMA Spectrometer has a high-quality metallic slit (100 um). The unit has an SMA connector that allows connect it to an optical fiber (purchased separately). The wavelength range goes from 350nm to 850mnm by default. The R-Spectrometer is a high sensitivity instrument which is built on a Sony ILX522 linear detector, that is more sensitive than the Sony SMOS detector inside the SMA Spectrometer. The wavelength range of R-Spectrometer is from 390nm to 640nm approximately.

 

Please, consult the most recent data on the site of Spectragryph. https://www.effemm2.de/spectragryph/about_feat.html 

The Mini USB Spectrometer is not calibrated and needs to be calibrated at each use.

The SMA\SMA-E Spectrometer and R Spectrometer are delivered precalibrated and ready to use. The individual calibration file will be sent by email to users after payment.

The process of calibration is described in manuals. But here is the simple steps you can follow:

1. Connect your device to the computer and run the Spectragryph software.

2. Press the button “Connect” on a tab “Acquire”. A new window “webcam spectrum image” will appear; it will be black with a white frame.

3. Make sure that a light source is directed at the spectrometer.

4. Press the button “Acquire” on the tab “Acquire”. Also, you might need to set up exposure time and acquisition mode to “continuous”. Anyway, you will see a spectrum in the black window “Webcam spectrum image”.

5. Select the best ROI (Region Of Interest) for your spectrometer by drag and drop or minimize the white frame, so the spectrum (colorful line) will be inside the white frame.

6. Save these settings as a calibration file and use them for all your future experiments with this particular light source. Please, follow the manuals on the official website and learn how to create a settings file as the same as we send you along with SMA\SMA-E Spectrometer. https://www.effemm2.de/spectragryph/about_help_manual_acquire.

Please, take note that it is very important that you can not change the ROI for your experiments. If you move the white frame it will change the area of pixels on the detector which translates an image for analysis. Thus, the results of experiments will be not precise or even wrong.

The Mini USB Spectrometer is not calibrated and needs to be calibrated at each use.

The SMA\SMA-E Spectrometer and R Spectrometer are delivered precalibrated and ready to use. The individual calibration file will be sent by email to users after payment.

The process of calibration is described in manuals. But here is the simple steps you can follow:

1. Connect your device to the computer and run the Spectragryph software.

2. Press the button “Connect” on a tab “Acquire”. A new window “webcam spectrum image” will appear; it will be black with a white frame.

3. Make sure that a light source is directed at the spectrometer.

4. Press the button “Acquire” on the tab “Acquire”. Also, you might need to set up exposure time and acquisition mode to “continuous”. Anyway, you will see a spectrum in the black window “Webcam spectrum image”.

5. Select the best ROI (Region Of Interest) for your spectrometer by drag and drop or minimize the white frame, so the spectrum (colorful line) will be inside the white frame.

6. Save these settings as a calibration file and use them for all your future experiments with this particular light source. Please, follow the manuals on the official website and learn how to create a settings file as the same as we send you along with SMA\SMA-E Spectrometer. https://www.effemm2.de/spectragryph/about_help_manual_acquire.

Please, take note that it is very important that you can not change the ROI for your experiments. If you move the white frame it will change the area of pixels on the detector which translates an image for analysis. Thus, the results of experiments will be not precise or even wrong.

None of our instruments are intensity calibrated. This is because the calibration should be changed with every change in the measurement setup.

Please, consult us if intensity calibration is really needed.

Please follow the simple procedure which is determined by the developer of the software.
1. Download software (https://www.effemm2.de/spectragryph/down.html)
2. After ending the trial period (1 month) contact via https://www.effemm2.de/spectragryph/contact.html and claim that you use the software along with a Thunder Optics instrument for private, academic, or educational purposes and ask for the non-commercial license.

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