raspberry spegg © UVVIS29

For industrial applications the reproducibility of spectral measurements and sturdiness and durability of the measuring device is crucial. For reproducibility of spectral measurements between different devices and within the lifetime of the spectrometer, the slit and the position of the grating, the mirror and the detector must be the same. Only this way spectral evaluations, e.g. for the determination of certain analyte concentrations, can be transferred to equivalent spectrometers.

The raspberry spegg fulfills these requirements. Because of the monolithic setup the optical path is grounded over the entire lifetime. Each spectrometer is calibrated after production and does not need to be recalibrated. This manufacturing process ensures that the spectra of all raspberry spegg’s are comparable to each other. For each raspberry spegg, the calibration data is stored in the flash C of the microcontroller.

The electronic components of the raspberry spegg, including the integrated XenonLED375, also meet these requirements. E.g. no electrolytic capacitors with liquid electrolytes are used. The light source has its own electronically adjustable photodiode controlled voltage source or (default) adjustable control voltage. The LED power source can be set extern or (deflault) with the intern (5V) power source. Two analogue channels (channel b, g, max 4V) with 16bit resolution can read alternative to the spectrum.

The electronics and the spectrometer of the raspberry spegg are adjusted robustly and space-saving to the raspberry pi.

Only four GPIO’s (pin 4,6,8 and 10) are used for power supply and communication. All other GPIO’s (except 11-18) as well as the CSI Camera cable can be used with the raspberry spegg board. Three TTL output ports (K18, K16, K7) can be control by the spegg.

The raspberry spegg has a voltage supply connection with a polyfuse, which can also be used to supply the raspberry pi.

For more pictures click here. For more information here.

raspberry spegg © UVVIS29 

Art.Nr.: LIVIS2900

EAN: 791732154719 

delivery contents:

spegg © UVVIS29

16GBit SD card incl. demo Software in Python

Raspberry pi 3

Raspberry pi international power supply



Spectral Range

240 – 1050 nm


Ø 300 / 330 µm; NA= 0,22

Fiber length from spegg board to top

75cm +- 4cm

Fiber connector

male F-sma 905

Blazed Grating

g = 4,7 µm / d = 0,2 µm

Stray light Attenuation

> 17dB with GG495 at 470 nm

Spectral Resolution

< 10 nm FWHM / 2 nmPixel

Spectral Accuracy

2 nm (typ. 1 nm)

Inter Instrument Agr.

typ. 0,5 nm

Wavelength Stability

0,05 nm/K

Wavelength Repeatability (RT)

0,05 nm

Sensitivity (e.g. 500nm)

> 20 E15 cts x nm/Ws 

Noise Equivalent Power

3 pW 500nm; Ti 1s ; low signal

50 pW 500nm; high signal

Dynamic Range

> 5.000 ; low signal


16 bit; UART;

Wavelength range LED

370 – 1050 nm

Light source connector

female F-sma 905

Storage Temperature

– 40°C to +60°C

Operating Temperature

0°C to +40°C

Max. rel. humidity (not condensing)

85 %