US 2020/0166730 A1, Example 1 — Ryosuke Nagami, Tetsuya Ori
| 9 ELEMENTS / 6 GROUPS |
| 50 mm MARKETED / 48.57 mm DESIGN |
| f/3.5 MARKETED / FNo 3.56 DESIGN |
| 57.4° MARKETED / 60.4° DESIGN |
| 1 ASPHERICAL ELEMENT / 2 ASPHERICAL SURFACES |
Inner focus: G1, the stop, and G3 remain fixed while G2 translates toward the object. Infinity and the 2000 mm object-to-surface-1 row are patent-published; the 0.55 m endpoint is a mechanism-constrained reconstruction after PP-to-air-equivalent rear-plane normalization. The intermediate focus coordinate uses the restored physical focal-plane distance before PP compression.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus (convex to object) | 648338 class |
| L12 | Positive Meniscus (convex to object) | 871407 class |
| L21 | Biconcave Negative | 613370 class |
| L22 | Biconvex Positive | 883392 class |
| L23 | Biconcave Negative | 548458 class |
| L24 | Biconvex Positive | 652585 class |
| L25 | Negative Meniscus (2× Asph; convex to image) | 773495 class |
| L31 | Negative Meniscus (convex to image) | 847238 class |
| L32 | Plano-Convex Positive | 001291 class |