doublet de lentilles
1977 / The Development of Compound Eyepieces, 1640-1670 / Albert van Helden / Journal for the History of Astronomy 8 (1977) p. 26 [lien]
1999 / Diffractive Apochromatic Double-Gauss Lens / J. Brian Caldwell / Optics and Photonics News 10 (1999) p. 43 [lien]
1999 / Fast Double-Gauss Lens / J. Brian Caldwell / Optics and Photonics News 10 (1999) p. 38 [lien]