EISCO High Resolution Quantitative Spectroscope, 400-700 nm, +/-5nm

It’s hard to photograph what it looks like inside, but this is the spectrum from a white LED light bulb. I can’t use this device whilst wearing glasses but it does allow easy experiments with light sources and shows easily that phone/computer/TV screens put out only part of the spectrum, even when they appear white. Very cool.

It works. Fascinating differences between spectra of 'white' artificial lights. Crudely made: needs a finer intake slit, less internal reflection and a lens to view through. But you can actually read off the Angstrom wavelengths, more or less. Feasible to fix these things yourself - a bit of extra science!

It's OK for a toy. But the slit has to be a bit narrower to be able to see 5nm separation!

Out of focus . Useless.

Malgré que le spectre ne soit pas très lumineux, pour le prix c'est quand même ok. J'ai testé la précision de l'échelle avec 3 lasers. À 410nm il donne 415, à 530nm el donne 525 et à 650nm il donne 640. Voici une vidéo sur youtube qui indique comment mesurer précisément la longueur d,onde d'un laser avec un "diffracting grating". Although the spectrum is not very bright, for the price it's still ok. I tested the accuracy of the scale with 3 lasers. At 410nm it gives 415, at 530nm it gives 525 and at 650nm it gives 640. Here is a video on youtube that shows how to accurately measure the wavelength of a laser with a "diffracting grating".

A lot of fun (looking at the spectra of tube lights or of the light passing through colored solutions).

Ottimo prodotto. Facile da usare e dotato di chiare istruzioni (solo in inglese). Purtroppo per un migliore impiego servirebbero anche degli accessori che non sembrano disponibili (sorgenti luminose con specifiche emissioni).

Works as it should, I'm happy with my order

Works fine for the price. I think the accuracy is overstated as plus and minus 5 nm, but for my lab, determining the wavelength of the output of various light-emitting diodes, it was accurate enough. Takes a couple of minutes to become adept with it.