US 2016/0282590 A1, Example 1 — Hiroki Saito, Takashi Suzuki
| 13 ELEMENTS / 11 GROUPS |
| 16 mm f/1.4 (MARKETED) |
| f = 16.475660 mm / FNo = 1.44 (DESIGN) |
| 81.8° DESIGN FULL FIELD |
| 4 ASPHERICAL SURFACES |
PUBLISHED floating focus: G1 fixed; G2 and G3 move objectward on distinct paths. Infinity/middle/close spacings are patent Table 3; focusPositions[1]=0.2499413665 is a solved UI coordinate. Optional plate PP is modeled in rearPlates behind the patent DD25 gap.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | 847238 — high-index flint class (vendor indeterminate) |
| L12 | Neg. Meniscus (2× Asph) | S-BAL42 class (OHARA; patent vendor unspecified) |
| L13 | Biconcave Negative | S-FSL5 class (OHARA; patent vendor unspecified) |
| L14 | Biconvex Positive | 001291 — high-index lanthanum-flint class (vendor indeterminate) |
| L15 | Biconcave Negative | S-NSL36 class (OHARA; coordinate match) |
| L16 | Positive Meniscus | S-LAH58 class (OHARA; patent vendor unspecified) |
| L21 | Positive Meniscus | S-LAH59 class (OHARA; patent vendor unspecified) |
| L22 | Negative Meniscus | 923189 — high-index flint class (vendor indeterminate) |
| L23 | Neg. Meniscus (2× Asph) | Unmatched (nd=1.80348, nu_d=40.45; no defensible current public-catalog identity) |
| L24 | Positive Meniscus | 593686 — low-dispersion class (HOYA FCD505/FCD515 unresolved by nd/nu_d) |
| L25 | Negative Meniscus | S-TIM22 class (OHARA; coordinate match) |
| L26 | Plano-Convex Positive | 497816 — low-dispersion/ED class (vendor indeterminate) |
| L31 | Negative Meniscus | 946180 — high-index flint class (vendor indeterminate) |