JP 2013-019993 A — Haruo Sato
| 9 ELEMENTS / 5 GROUPS · PATENT DESIGN CANDIDATE |
| f = 58.0216 mm (PATENT) |
| F/1.45 (PATENT) |
| 2ω = 41.72° |
| 2 ASPHERICAL SURFACES |
Unit focus per patent paragraph 75: all groups and the stop move objectward. The 0.58 m endpoint and extension are a paraxial reconstruction; no finite-focus station or motor mechanism is specified for Example 2.
| Element | Type | Glass |
|---|---|---|
| La | Pos. Meniscus (1× Asph) | Unidentified glass (nd 1.74443, vd 49.53) |
| Lb1p | Positive Meniscus | J-LASKH2 (Hikari, inferred coordinate counterpart) |
| Lb1n | Negative Meniscus | S-FSL5 (OHARA, inferred coordinate counterpart) |
| Lb2 | Negative Meniscus | E-FD8 (HOYA, inferred coordinate counterpart) |
| Lcn | Biconcave Negative | H-ZF4A (CDGM, inferred coordinate counterpart) |
| Lcp | Biconvex Positive | S-LAH58 (OHARA, inferred coordinate counterpart) |
| Ldp1 | Biconvex Positive | S-LAH58 (OHARA, approximate coordinate counterpart) |
| Ldn | Biconcave Negative | J-LLF6 (Hikari, inferred coordinate counterpart) |
| Ldp2 | Biconvex Positive (1× Asph) | Unidentified glass (same source coordinates as La) |