US 2015/0097989 A1, Numerical Example 2 — Hideki Kai, Takahiro Kitada, Takuya Imaoka
| 8 ELEMENTS / 7 GROUPS |
| DESIGN f = 12.48–30.72 mm |
| DESIGN F/3.62–5.84 |
| 6 ASPHERICAL SURFACES / 3 ELEMENTS |
| 1 ED ELEMENT |
Infinity focus only. The patent focuses by moving G3 (L7 alone) toward the image at every zoom position (¶0091) but prints no close-focus spacings, so no focus travel is modeled and both focus endpoints repeat the infinity spacings. Panasonic's 0.2 m (wide) to 0.3 m (tele) minimum focus distance is not modeled. The wide, middle and tele spacings are printed; the zoom positions between them are interpolated, not the factory cam.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | TAFD25 (catalog equivalent; supplier unconfirmed) |
| L2 | Biconcave Negative (2× Asph) | Unmatched (nd 1.80755, νd 40.9; no catalog glass with these values) |
| L3 | Positive Meniscus | FDS18 (catalog equivalent; supplier unconfirmed) |
| L4 | Positive Meniscus (2× Asph) | Unmatched (nd 1.80755, νd 40.9; no catalog glass with these values) |
| L5 | Negative Meniscus | TAFD25 (catalog equivalent; supplier unconfirmed) |
| L6 | Biconvex Positive | FCD505 (catalog equivalent; supplier unconfirmed) |
| L7 | Biconcave Negative (2× Asph) | Unmatched (nd 1.5436, νd 56.0; no catalog glass with these values) |
| L8 | Biconvex Positive | PCD4 (catalog equivalent; supplier unconfirmed) |