Achromatic lens

An achromatic lens or achromat is a lens that is designed to limit the effects of chromatic and spherical aberration. Achromatic lenses are corrected to bring two wavelengths (typically red and blue) into focus on the same plane.
The most common type of achromat is the achromatic doublet, which is composed of two individual lenses made from glasses with different amounts of dispersion. Typically, one element is a negative (concave) element made out of flint glass such as F2, which has relatively high dispersion, and the other is a positive (convex) element made of crown glass such as BK7, which has lower dispersion. The lens elements are mounted next to each other, often cemented together, and shaped so that the chromatic aberration of one is counterbalanced by that of the other.

[@Bippy55]

Thank you for this interesting video. I wish there was a way you can show the dramatic difference in visual performance of an achromatic lens and a simple lens.

[@VYOptoelectronicsCoLtd]

Nice to know you like this video~ Here is picture showing the difference between achromatic lens and simple lens. Since pictures cannot be added here, if it's convenient, could you please let me know your email? I'll send it to you~ (My mail is [e-mail])

[@weibrot6683]

Ok, but wht do you say an achromat is designed to correct chrimatic aborration? Thats not ehat an chrimat does, as you said yourself, it only focuses two different wavelengths to a point, not all of them -> the lens has chromatic aborration, thats where apochromatic lenses come into play -> actually designed to remove chromatic aborration

[@reeno1357]

If you would have explained too how they have to be put into the eyepiece it would have been an A+ 😅 Anyway, i have learned things from this vid so it gets a like 😉

[@VYOptoelectronicsCoLtd]

Thats really a nice suggestion~ Thank you for your like😊

[@misaelescobarruiz3107]

Muy buenos lentes

[@VYOptoelectronicsCoLtd]

Gracias por tu me gusta ~

[@marcusdamberger]

music is way too loud, just dump the music altogether.

[@VYOptoelectronicsCoLtd]

Thank you for your kind suggestion, we'll consider it.

[@cryora]

How does it compare to a Cooke triplet?

[@VYOptoelectronicsCoLtd]

Lenses can be customized according to requirements, and the quality and specifications can meet the requirements ~

[@esteellleee]

bonjour, est-ce que le doublet achromatique permet d'éliminer les irisations dues à l'aberration chromatique ?

[@VYOptoelectronicsCoLtd]

Je viens de trouver ce message après un long moment, 😅merci pour votre intérêt~ Une lentille achromatique conçue pour les longueurs d'onde visibles corrige le rouge et le bleu, qu'il s'agisse d'une configuration double ou triple. Y a-t-il eu des projets connexes récemment ? Vos demandes sont toujours les bienvenues ~（email：[e-mail]）