WO 2025/263124 A1 Example 1 — Sony Group / Yamasaki, Yamada
| 20 ELEMENTS / 14 GROUPS |
| f = 28.86–67.87 mm |
| F/2.06 |
| 2ω = 73.71–35.36° |
| 10 ASPHERICAL SURFACES (5 elements) |
Dual-group floating inner focus: G5 (L51, negative) moves toward image, G6 (L61, positive) moves toward object. Four XD linear motors (two per group).
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | Dense flint (≈S-NPH1W, OHARA; Δnd = +0.0008, probable proprietary melt) |
| L12 | Biconvex Positive | 595686 — fluorophosphate crown (patent nd=1.59489, νd=68.6) |
| L13 | Positive Meniscus | 596670 - fluorophosphate crown (patent nd=1.59561, vd=67.0; no exact public catalog match) |
| L21 | Neg. Meniscus (2× Asph) | 774494 — lanthanum crown (patent nd=1.77373, νd=49.4) |
| L22 | Biconcave Negative | 777297 — dense flint (patent nd=1.77660, νd=29.7) |
| L23 | Biconvex Positive | 930240 — ultra-high-index dense flint (patent nd=1.93024, νd=24.0) |
| L24 | Negative Meniscus | 700555 — barium crown (patent nd=1.69980, νd=55.5) |
| L31 | Biconvex Positive (2× Asph) | 856401 — lanthanum dense crown (patent nd=1.85612, νd=40.1) |
| L32 | Biconvex Positive | S-FPL55 (OHARA) |
| L33 | Biconcave Negative | 571560 — barium crown (patent nd=1.57125, νd=56.0) |
| L41 | Negative Meniscus | S-NPH85 (OHARA) |
| L42 | Positive Meniscus | S-FPL55 (OHARA) |
| L43 | Biconvex Positive | S-FPL55 (OHARA) |
| L44 | Biconcave Negative | 863252 — dense flint (patent nd=1.86252, νd=25.2) |
| L45 | Biconvex Positive (2× Asph) | 856401 — lanthanum dense crown (patent nd=1.85612, νd=40.1) |
| L51 | Neg. Meniscus (2× Asph) | S-LAM73 (OHARA) |
| L61 | Biconvex Positive (2× Asph) | S-FPM5 (OHARA) |
| L71 | Positive Meniscus | S-NPH7 (OHARA) |
| L72 | Negative Meniscus | 863252 — dense flint (patent nd=1.86252, νd=25.2) |
| L73 | Negative Meniscus | S-LAM73 (OHARA) |
Detailed analysis available in the interactive viewer above.