WO2019/229849 A1 EXAMPLE 1 — NIKON / TSUBONOYA, HARADA, TAKE
| 17 ELEMENTS / 10 GROUPS |
| f ≈ 59.6 mm |
| F/0.95 (design F/0.98) |
| 2ω ≈ 40.0° |
| 3 ASPHERICAL SURFACES |
Unit extension of entire front group GF (13 elements, surfaces 1A–22). GF translates 18.6 mm toward object for 0.5 m close focus. GR fixed. Manual focus only (~320° focus throw).
| Element | Type | Glass |
|---|---|---|
| L11 | Biconvex Positive (1× Asph) | Ultra-high-index LaH (no confirmed catalog match; nd 1.903, νd 35.77) |
| L12 | Biconcave Negative | Anomalous dispersion special (no confirmed catalog match) |
| L13 | Biconcave Negative | KZFS-type (near N-KZFS4 / S-NBM51) |
| L14 | Biconvex Positive | ED phosphate crown (near S-FPM2 / FCD10; used ×3) |
| L21 | Biconvex Positive | Lanthanum dense flint (near E-LASF013 / H-ZLaF68C) |
| L22 | Biconvex Positive | ED phosphate crown (same as L14) |
| L23 | Biconvex Positive | ED phosphate crown (same as L14) |
| L24 | Biconcave Negative | High-dispersion flint (near S-NBH53V; used ×2) |
| L25 | Biconcave Negative | KZFS-type (same as L13) |
| L26 | Biconvex Positive | Super-ED fluorophosphate (near S-FPL51 / FCD1) |
| L27 | Biconvex Positive | S-LAH58 (OHARA); used ×3 |
| L28 | Biconvex Positive (1× Asph) | S-LAH98 (OHARA) / TAFD45 (HOYA) |
| L29 | Biconcave Negative | High-dispersion flint (same as L24) |
| L31 | Biconvex Positive | S-LAH58 (OHARA; same as L27) |
| L32 | Biconcave Negative | Dense flint (near S-NBH52V) |
| L33 | Biconvex Positive | S-LAH58 (OHARA; same as L27) |
| L34 | Biconcave Negative (1× Asph) | Lanthanum crown (no confirmed catalog match; near TAFD5F) |
Detailed analysis available in the interactive viewer above.