JP 2025-58577 A, Example 1 — Yuki Shibata
| 9 ELEMENTS / 8 GROUPS |
| f ≈ 48.5 mm |
| F/1.23 |
| 2ω ≈ 32.6° |
| ALL SPHERICAL |
Unit focusing (entire optical assembly extends toward the object). The close endpoint is the patent's tabulated state (ZD0 = 369.5 mm from surface 1, BF 19.36 mm, 441.3 mm object-to-image); the production specification is 0.45 m.
| Element | Type | Glass |
|---|---|---|
| L11 | Positive Meniscus | S-LAL18 (OHARA) |
| L12 | Positive Meniscus | S-LAL18 (OHARA) |
| L13 | Positive Meniscus | S-LAL18 (OHARA) |
| L14 | Negative Meniscus | S-TIH13 (OHARA) |
| L15 | Negative Meniscus | S-TIH14 (OHARA) |
| L21 | Negative Meniscus | S-NPH1 (OHARA) |
| L22 | Biconvex Positive | TAFD37A (HOYA) |
| L31 | Biconvex Positive | TAFD37A (HOYA) |
| L32 | Negative Meniscus | S-NBH5 (OHARA) |