WO 2025/239028 A1 — Masakazu Yamagishi, Ryohei Tazaki, Yuma Kumisawa
| 14 ELEMENTS / 11 GROUPS |
| f ≈ 82.5 mm |
| F/1.46 |
| 2ω ≈ 29.4° |
| 3 ASPHERICAL SURFACES (2 XA ELEMENTS) |
| 2 ED ELEMENTS |
Inner focus — G2 (L5–L10, 6 elements) translates 11.17 mm toward object. G1 and G3 fixed. XD linear motor drive.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | PBH21 (OHARA; historical 923209) |
| L2 | Positive Meniscus | S-FPL51 (OHARA) |
| L3 | Positive Meniscus | S-FPM3 (OHARA) |
| L4 | Negative Meniscus | S-NBH56 class (OHARA; patent nd=1.85451, νd=25.2) |
| L5 | Biconcave Negative | S-NBH5 (OHARA) |
| L6 | Pos. Meniscus (1× Asph) | S-LAH89 class (OHARA; patent nd=1.85108, νd=40.1) |
| L7 | Biconvex Positive | S-LAH98 (OHARA) |
| L8 | Biconvex Positive | S-PHM52 (OHARA) |
| L9 | Biconcave Negative | NBFD29 (HOYA, 770297) |
| L10 | Biconvex Positive | S-LAH65V (OHARA) |
| L11 | Biconvex Positive (2× Asph) | S-LAH89 class (OHARA; patent nd=1.85108, νd=40.1) |
| L12 | Biconvex Positive | 986165 — ultra-high-index dense flint (patent nd=1.98613, νd=16.5) |
| L13 | Biconcave Negative | S-FTM16 (OHARA) |
| L14 | Negative Meniscus | 870200 — dense flint (patent nd=1.86966, νd=20.0) |