US 2021/0072505 A1, Numerical Example 1 — Kana Kobayashi
| 12 ELEMENTS / 11 GROUPS |
| f ≈ 82.45 mm |
| F/2.06 |
| 2ω ≈ 29.4° |
| ALL SPHERICAL |
Unit focus — entire front group L1 (6 elements, 5 groups + aperture stop) translates toward the object. Rear group L2 (6 elements, 6 groups) fixed. Patent d12 grows 2.52 → 3.60 → 29.52 mm (∞, β = −0.02, β = −0.5): 27.0 mm extension at 0.5×.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | S-BSM14 (OHARA) |
| L2 | Positive Meniscus | S-BSM14 (OHARA) |
| L3 | Positive Meniscus | S-FPL51 (OHARA) — UD |
| L4 | Biconcave Negative | S-TIM28 (OHARA) |
| L5 | Negative Meniscus | S-TIH53 (OHARA) |
| L6 | Biconvex Positive | TAFD37A (HOYA) |
| L7 | Biconcave Negative | S-NBH8 (OHARA) |
| L8 | Biconvex Positive | S-LAH65V (OHARA) |
| L9 | Positive Meniscus | E-FDS1 (HOYA) |
| L10 | Biconcave Negative | S-LAH60 (OHARA) |
| L11 | Biconvex Positive | S-LAH55V (OHARA) |
| L12 | Negative Meniscus | S-TIH53 (OHARA) |