JP 2021-128263 A — Hitoshi Murakami, Ryosuke Sato
| 12 ELEMENTS / 9 GROUPS |
| DESIGN f = 63.10 mm |
| DESIGN F/2.07 |
| 3 ASPHERICAL SURFACES / 2 ELEMENTS |
| PUBLISHED INNER-FOCUS ENDPOINTS |
PUBLISHED endpoints: only group L2 (element E7, surfaces 12-13) moves, 9.7694 mm toward the image from infinity to the closest state; groups L1 and L3, the stop and the image plane remain fixed. Native near d0 = 460.9959 mm; rounded-table object-to-image total = 549.9960 mm. Intermediate linear gap interpolation is modeled, not a published focus law.
| Element | Type | Glass |
|---|---|---|
| E1 | Biconcave Negative | E-FEL2 class (HOYA; coordinate match, supplier unconfirmed) |
| E2 | Biconvex Positive (1x Asph) | M-PCD51 class (HOYA; coordinate match, supplier unconfirmed) |
| E3 | Negative Meniscus | E-F2 class (HOYA; coordinate match, supplier unconfirmed) |
| E4 | Positive Meniscus | FDS18-W class (HOYA; coordinate match, supplier unconfirmed) |
| E5 | Negative Meniscus | FD140 class (HOYA; coordinate match, supplier unconfirmed) |
| E6 | Positive Meniscus | FCD705 class (HOYA; coordinate match, supplier unconfirmed) |
| E7 | Negative Meniscus | FC5 class (HOYA; coordinate match, supplier unconfirmed) |
| E8 | Biconvex Positive | TAFD37A class (HOYA; coordinate match, supplier unconfirmed) |
| E9 | Biconcave Negative | NBFD32 class (HOYA; coordinate match, supplier unconfirmed) |
| E10 | Biconvex Positive (2x Asph) | M-NBFD130 class (HOYA; coordinate match, supplier unconfirmed) |
| E11 | Biconcave Negative | E-FD15L class (HOYA; coordinate match, supplier unconfirmed) |
| E12 | Biconcave Negative | E-F2 class (HOYA; coordinate match, supplier unconfirmed) |