Lens Viewer

Classic lens design forms, each one a verified prescription: Double-Gauss, Cooke triplet, Tessar, Sonnar, Petzval, telephoto, eyepieces, relays and more.

Open a family on the left and pick a design to see its cross-section and ray trace, its first-order specs, Seidel sums, spot diagram, ray fan, and MTF.

Every design here comes from a public source: MIL-HDBK-141 (US government, public domain), published patents, or optiland's MIT-licensed samples. Prescriptions are traced in optiland; all numbers and plots were computed ahead of time, nothing runs in your browser.