US 2014/0347522 A1 — Yoshito Iwasawa
| 17 ELEMENTS / 13 GROUPS |
| PATENT 14.43-145.40 mm |
| MODELED f/3.6909-5.9053 |
| 4 ASPHERICAL SURFACES |
| 0.5 m MOD (CONSTRAINED RECONSTRUCTION) |
CONSTRAINED_RECONSTRUCTION: production 0.5 m subject-to-image-plane MOD solved by translating G4 only; D28 + D32 is conserved at each zoom position. Patent Table 12 itself represents an approximately 1.0 m subject-to-image state.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | 904313 class (vendor unresolved) |
| L2 | Biconvex Positive | 497816 fluorophosphate / ED-crown class (vendor unresolved) |
| L3 | Positive Meniscus | 618634 phosphate-crown class (vendor unresolved) |
| L4r | Hybrid Aspherical Resin Layer | Unmatched (hybrid-asphere resin, nd=1.51460, vd=49.96) |
| L4 | Negative Meniscus (Hybrid Substrate) | 911353 class (vendor unresolved) |
| L5 | Biconcave Negative | 911353 class (vendor unresolved) |
| L6 | Biconvex Positive | 923209 dense-flint class (vendor unresolved) |
| L7 | Negative Meniscus | 773496 class (vendor unresolved) |
| L8 | Biconvex Positive (2x Asph) | 583595 crown class (vendor unresolved) |
| L9 | Negative Meniscus | LASFN13 (Sumita catalog equivalent; production supplier unspecified) |
| L10 | Biconvex Positive (Front Asph) | 583595 crown class (vendor unresolved) |
| L11 | Negative Meniscus | 908334 class (catalog unresolved) |
| L12 | Negative Meniscus | 911353 class (vendor unresolved) |
| L13 | Biconvex Positive | M-PCD4 (Hoya catalog equivalent; production supplier unspecified) |
| L14 | Biconvex Positive | 805255 dense-flint class (vendor unresolved) |
| L15 | Biconcave Negative | 804465 class (vendor unresolved) |
| L16 | Negative Meniscus | 805255 dense-flint class (vendor unresolved) |
| L17 | Positive Meniscus | 729547 class (vendor unresolved) |