US 2021/0231930 A1, Example 1 — Shunsuke Miyagishima
| 13 ELEMENTS / 10 GROUPS |
| f = 30.890 mm (design) |
| F/3.51 (design) |
| 2ω = 84.2° (patent, infinity) |
| 2 ASPHERICAL / 2 ED ELEMENTS (production specification) |
Internal focus: G2 alone translates objectward. Infinity and 1.2 m are patent-published; 0.32 m is a code-solved constrained reconstruction with DD8 + DD17 fixed at 11.410 mm.
| Element | Type | Glass |
|---|---|---|
| L11 | Neg. Meniscus (2× Asph) | Q-LASFH58S equivalent (coordinate-compatible catalog proxy; vendor unresolved) |
| L12 | Biconcave Negative | 497816 low-dispersion class |
| L13 | Biconvex Positive | S-TIH23-class (OHARA exact-coordinate candidate) |
| L14 | Biconvex Positive | S-LAH51-class (OHARA coordinate candidate) |
| L21 | Negative Meniscus | S-LAH52Q-class (OHARA coordinate candidate) |
| L22 | Positive Meniscus | S-BSM15-class (OHARA exact-coordinate candidate) |
| L23 | Negative Meniscus | 954323 class (S-LAH98 / TAFD45L exact-coordinate candidates) |
| L24 | Positive Meniscus | 497816 low-dispersion class |
| L25 | Pos. Meniscus (2× Asph) | Q-SK52S equivalent (qualified spectral proxy; patent 1.58135 / 59.38; vendor unresolved) |
| L31 | Positive Meniscus | E-FDS2-class (HOYA exact-coordinate candidate) |
| L32 | Biconcave Negative | S-NBH53V-class (OHARA exact-coordinate candidate) |
| L33 | Negative Meniscus | FDS18-class (HOYA exact-coordinate candidate) |
| L34 | Biconvex Positive | 569560 crown class (H-BaK7GT / BAC4 near-coordinate candidates) |