US 2023/0213739 A1, Numerical Example 1 — Makoto Nakahara, Shinya Okuoka
| 8 ELEMENTS / 8 GROUPS |
| f ≈ 24.7–48.5 mm |
| F/4.63–6.48 |
| 2ω ≈ 72.5–46.2° |
| 3 ASPHERICAL SURFACES (G2, L4) |
Inner focus — LP (single positive meniscus, f ≈ 63 mm) moves toward object. Lead screw STM drive.
| Element | Type | Glass |
|---|---|---|
| G1 | Negative Meniscus | S-BSM18 — qualified coordinate-compatible spectral proxy; supplier and composition unresolved |
| G2 | Neg. Meniscus (1× Asph) | E48R (qualified spectral proxy; source composition and supplier unspecified) |
| L1P | Positive Meniscus | S-TIM35 — qualified coordinate-compatible spectral proxy; supplier and composition unresolved |
| L2a | Biconvex Positive | S-LAH95 — qualified coordinate-compatible spectral proxy; supplier and composition unresolved |
| L2b | Biconcave Negative | S-NPH53 — qualified coordinate-compatible spectral proxy; supplier and composition unresolved |
| L2c | Biconvex Positive | S-LAH66 — qualified coordinate-compatible spectral proxy; supplier and composition unresolved |
| LP | Positive Meniscus | S-FSL5 — qualified coordinate-compatible spectral proxy; supplier and composition unresolved |
| L4 | Neg. Meniscus (2× Asph) | E48R (qualified spectral proxy; source composition and supplier unspecified) |