WO 2024/147268 A1 — Mami Muratani, Hiroshi Yamamoto, Tomonori Kuribayashi, Takuro Ono
| 16 ELEMENTS / 14 GROUPS |
| f ≈ 132.3 mm |
| F/1.85 |
| 2ω ≈ 18.6° |
| 1 ASPHERICAL SURFACE |
Floating inner focus: G2 (L7, negative) moves toward image, G4 (L13, positive) moves toward object. Counter-directional movement maintains aberration balance. Dual STM stepping motors. Total variable gap sum constant at 36.882 mm.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | Nikon SR glass; J-SFH4 catalog-equivalent spectral proxy (production material unspecified) |
| L2 | Positive Meniscus | ED fluorophosphate (near S-FPL51) |
| L3 | Positive Meniscus | ED fluorophosphate (near S-FPL51) |
| L4 | Biconvex Positive | ED fluorophosphate (near S-FPL51) |
| L5 | Biconcave Negative | 855252 anomalous-flint class; NBFD25 catalog spectral proxy (patent dPgF retained) |
| L6 | Pos. Meniscus (1× Asph) | N-BK7 / S-BSL7 (PGM asphere) |
| L7 | Negative Meniscus | 697555 — lanthanum crown (patent coordinate; vendor unresolved) |
| L8 | Positive Meniscus | S-NPH1-type phosphate flint (anomalous dispersion) |
| L9 | Biconcave Negative | 855252 anomalous-flint class; NBFD25 catalog spectral proxy (patent dPgF retained) |
| L10 | Positive Meniscus | ED fluorophosphate crown (near S-FPM2) |
| L11 | Biconvex Positive | 804396 class; S-LAH63Q catalog spectral proxy (production supplier unspecified) |
| L12 | Negative Meniscus | 835427 class; S-LAH55VS catalog spectral proxy (production supplier unspecified) |
| L13 | Positive Meniscus | 859300 class; NBFD30 catalog spectral proxy (production supplier unspecified) |
| L14 | Biconcave Negative | S-LAH51 (OHARA, patent nd/vd match) |
| L15 | Positive Meniscus | Dense short flint (≈ S-TIH53) |
| L16 | Negative Meniscus | 816466 class; J-LASF09A catalog spectral proxy (production supplier unspecified) |