Introduction to Spectroscopes

[colinsk]

http://www.spectrohelioscope.org/net/spectro.pdf

[defourneau]

le spectroscope le plus simple:
une lunette
un tube en métal avec de la colle, pour coller un rond métallique au bout
2 lames
un réseau
un objectif photographique
une plaque de bois
une perceuse.

[brianb11213]

What are those slit jaws made from?

I remember trying to make decent slit jaws using what I thought was the best possible available material (razor blades, new, honed against a piece of flat glass) and having terrible difficulties getting edges which were straight and even... it's surprising how ragged a razor blade can look when it's examined at a scale approaching the wavelength of light.

[defourneau]

les lames sont en laiton, elles sont usées sur un papier imprégné de liquide à polir l'argenterie

[Merlin66]

I've been finding that pencil sharpener blades are very good.
Easily available and can be set down to 30micron with little trouble.
(I use the laser diffaction method for setting the gap - See "Astronomical Spectroscopy for Amateurs", p 140)