Based on our e9u-TCD1304DG-STD/PRO line scan cameras, we are currently developing a do-it-yourself (DIY) spectrometer that is specially designed for use in research and teaching. The focus is on an open and transparent design, so that both replication and own modifications for special applications are easily possible. By building your own setup, you not only obtain a powerful measuring instrument, but also gain a fundamental understanding of how a spectrometer works.

The first prototypes of our spectrometers are already in use and the DIY spectrometers will soon be available as finished devices or kits as well as individual components via our Maker Web Shop.

The possible applications in the STEM field are diverse and include the spectroscopy of light sources (technology), the evaluation of emission spectra (physics/chemistry), transmission measurements of extracted dyes (biology) or the programming of evaluation routines and user interfaces (computer science).

Replica instructions are currently available on request. Please contact us via e-mail.

You can also follow us on LinkedIn, for example, if you want to stay up to date.

Robust and transparent design

The arrangement of the optical components in a Czerny-Turner arrangement ensures a clear beam path, which makes the functional principle easier to understand and facilitates the teaching of learning content. The signal is coupled in using an inexpensive plastic optical fiber, which makes the overall system robust in use. For example, damaged light guides can be easily replaced.

High-quality optoelectronic components

Any optoelectronic device is only as good as the quality of the components used. By using high-quality optical elements, it is also possible to record high-resolution spectra. A CCD detector with 3648 pixels developed as part of a BMBF project allows high-resolution spectra as well as low-noise signal recording with integration times in the minute range for the detection of weak signals.

Easy replica

The holders for the optical components are manufactured using a 3D printer to make it easier to build your own replicas and possible modifications. Light-tight and yet easily removable housings (e. g. for use in practical courses) are constructed using laser-cut MDF. Robust aluminum housings are available for devices that—once adjusted—are to be used for experiments over a longer period of time.

All CAD files for 3D printing and cutting will be freely available.

Individual configuration

Each DIY spectrometer can be individually adapted to a specific task by selecting the appropriate optical components:

• Entrance slit: 10 µm, 30 µm oder 100 µm
• Mirror focal length: 150 mm, 100 mm oder 75 mm
• Diffraction grid: 300 lp/mm, 600 lp/mm oder 1200 lp/mm

Depending on the combination of slit size, mirror focal length and diffraction grid resolution, both the spectral range covered and the sensitivity and resolution of the spectrometer can be adjusted over a wide range.

Open Source

As an open-source project, all information on the components used is open, so that spare parts or extensions can be easily manufactured using a 3D printer and laser cutter if required.

The spectrometer can be controlled from a variety of programming languages using DLLs. Example codes for C+ and Python are also disclosed here.

Useful accessories

In addition to the actual spectrometers, helpful accessories will also be available in the near future. Among other things, the following are planned

• Calibration aids with high-power white light LED, laser and glow lamp
• Various light sources for calibration
• UV light sources for fluorescence experiments
• External extensions, such as a transmission module for measuring absorptions
• Upgrade modules to increase the performance of the basic spectrometer, such as Peltier cooling of the sensor or an automated focus unit

Follow us, e. g. on LinkedIn, to stay informed about the latest developments!