US 2016/0266350 A1, Example 1 — Tomoko Iiyama, Masafumi Sueyoshi
| 11 ELEMENTS / 9 GROUPS |
| f ≈ 27.08 mm |
| F/1.76 |
| 2ω ≈ 79.9° |
| 3 ASPHERICAL ELEMENTS (5 SURFACES) |
Floating inner focus: G2 (doublet) and G4 (singlet) move toward object. Macro mode (M2) extends G1–G4 as a unit to 0.17 m.
| Element | Type | Glass |
|---|---|---|
| L1 | Biconcave Negative | S-TIL26 (OHARA catalog equivalent; patent nd=1.56732, νd=42.8, vendor unspecified) |
| L2 | Biconvex Positive | TAFD33 (HOYA catalog equivalent; patent nd=1.881, νd=40.1, vendor unspecified) |
| L3 | Biconcave Negative | S-TIM5 (OHARA catalog equivalent; patent nd=1.60342, νd=38.0, vendor unspecified) |
| L4 | Biconvex Positive | FCD515 (HOYA catalog equivalent; patent nd=1.59282, νd=68.6, vendor unspecified) |
| L5 | Positive Meniscus | TAFD35 (HOYA catalog equivalent; patent nd=1.91082, νd=35.2, vendor unspecified) |
| L6 | Pos. Meniscus (1× Asph) | 877370 — high-index lanthanum glass (catalog unresolved; patent nd=1.87722, νd=37.0) |
| L7 | Negative Meniscus | S-TIH14 (OHARA catalog equivalent; patent nd=1.76182, νd=26.6, vendor unspecified) |
| L8 | Biconcave Negative | S-TIH13 (OHARA catalog equivalent; patent nd=1.74077, νd=27.8, vendor unspecified) |
| L9 | Biconvex Positive | TAFD33 (HOYA catalog equivalent; patent nd=1.881, νd=40.1, vendor unspecified) |
| L10 | Pos. Meniscus (2× Asph) | S-LAH66 (OHARA catalog equivalent; patent nd=1.77271, νd=49.7, Δnd 2e-4, vendor unspecified) |
| L11 | Neg. Meniscus (2× Asph) | 683330 — dense flint (catalog unresolved; patent nd=1.68250, νd=33.0; prior H-ZF52A label rejected) |