Patent ID: 11892609
Assignee: MLOPTIC CORP.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A lens comprising:
(a) a first lens group comprising three positive singlets and an achromatic doublet for collecting all field rays received at said first lens group while making initial corrections of spherical and color aberrations;
(b) a second lens group comprising a near-symmetrical group comprising two positive meniscus elements and two negative meniscus elements, wherein said second lens group is configured to correct distortions;
(c) a third lens group comprising two positive lenses with an air gap disposed between said two positive lenses, wherein said third lens group is configured to correct field curvature and astigmatism; and
(d) a fourth lens group comprising a triplet and a positive meniscus element, wherein said fourth lens group is configured to correct spherical, coma, axial color and lateral color aberrations,, wherein said lens is disposed in an order of said first lens group, said second lens group, said third lens group and said fourth lens group.