Steinheil Cemented
Achromatic Triplets

Ebe a na-atụgharị uche ebe ụzarị ọkụ na-agafe n'etiti oghere oghere dị iche iche site na isi ebe ebe ụzarị ọkụ na-agafe na nsọtụ oghere na-agbakọta, nke a na-akpọ aberration spherical; mgbe ụzarị ọkụ na-agafe lens convex, ebe a na-ahụ maka ọkụ na-acha uhie uhie nke nwere ogologo wavele ogologo dị anya karịa ebe a na-ahụ maka ìhè anụnụ anụnụ nke nwere obere wavelength, n'ihi ya agba na-apụta na-agbapụta, nke a na-akpọ chromatic aberration. Ebe ọ bụ na ntụzịaka nke aberration na-apụta na oghere convex na-emegide oghere concave, site na ngwakọta nke oghere abụọ ma ọ bụ karịa, enwere ike ime ka ụzarị ọkụ gbakọta n'otu ebe, nke a na-akpọ mgbazi nhụsianya. Akara anya achromatic ziri ezi maka aberrations chromatic na sppherical. Emebere ọkọlọtọ anyị na achromat omenala anyị iji mejuo nnabata ndị siri ike achọrọ na sistemụ laser dị elu nke ugbu a, ngwa eletrọnịkị na onyonyo onyonyo.