US 9,651,761 B2, Example 1 — Tetsuya Ori, Michio Cho
| 16 ELEMENTS / 12 GROUPS |
| MARKETED 18-135 mm f/3.5-5.6 |
| PATENT DESIGN 18.50-130.78 mm f/3.61-5.81 |
| 4 ASPHERICAL ELEMENTS / 8 ASPHERICAL SURFACES |
| INNER FOCUS • OIS |
CONSTRAINED_RECONSTRUCTION: G3 (L31) alone translates objectward. At each zoom station DD11 decreases and DD13 increases by the same amount, conserving DD11 + DD13. The close state is code-solved to the FUJIFILM 0.45 m macro minimum focus distance measured from the physical sensor plane; the patent publishes infinity-focus zoom rows only.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | 923209 — high-index flint class (N-SF66/FDS1 coordinate) |
| L12 | Plano-Convex Positive | FCD505 (HOYA) |
| L13 | Positive Meniscus | 755523 — lanthanum crown class |
| L21 | Neg. Meniscus (2× Asph) | M-TAFD305 (catalog equivalent; supplier unresolved) |
| L22 | Biconcave Negative | 835427 — lanthanum glass class (S-LAH55V coordinates) |
| L23 | Biconvex Positive | 923209 — high-index flint class (N-SF66/FDS1 coordinate) |
| L31 | Biconcave Negative (2× Asph) | Unmatched (798453; nd=1.79839, νd=45.28) |
| L41 | Biconvex Positive (2× Asph) | Unmatched (569585; nd=1.56867, νd=58.50) |
| L42 | Biconvex Positive | S-FPL51 (OHARA) |
| L43 | Negative Meniscus | 923209 — high-index flint class (N-SF66/FDS1 coordinate) |
| L44 | Positive Meniscus | 001255 — high-index flint class (TAFD40 coordinates) |
| L45 | Biconcave Negative | 673382 — dense flint class (S-NBH52 coordinates) |
| L51 | Biconvex Positive (2× Asph) | Unmatched (666552; nd=1.66630, νd=55.16) |
| L52 | Biconcave Negative | S-LAH58 (OHARA) |
| L53 | Biconvex Positive | S-TIH10 (OHARA) |
| L61 | Positive Meniscus | S-FSL5 (OHARA) |