US 2022/0276464 A1 Example 7 — scaled to 23 mm
| 15 elements / 10 groups |
| Patent f = 23.62 mm scaled to 23.00 mm |
| F1.4 nominal / patent FNo 1.44 |
| 2 aspherical elements / 3 ED elements |
| Inner focus: G2 moves objectward |
Inner focus: G2 (surfaces 13-22A) translates objectward as a unit; G1, the stop, and G3 remain fixed.
| Element | Type | Glass |
|---|---|---|
| L11 | Biconcave Negative | 540597 - barium crown (N-BAK2 / S-BAL12 class; vendor uncertain) |
| L12 | Positive Meniscus | S-LAH58-class lanthanum dense flint |
| L13 | Biconcave Negative | S-NPH1 (OHARA) / 808-228 short flint |
| L14 | Biconvex Positive | S-LAH58-class lanthanum dense flint |
| L15 | Biconcave Negative | S-FTM16 (OHARA) |
| L16 | Biconvex Positive | S-LAH58-class lanthanum dense flint |
| L17 | Biconvex Positive | S-NPH3 (OHARA) / 959-175 short flint |
| L21 | Biconvex Positive | FCD505 (HOYA) ED fluorophosphate crown |
| L22 | Biconcave Negative | S-TIL6-class light flint |
| L23 | Biconcave Negative | S-TIH1-class dense flint |
| L24 | Biconvex Positive | S-LAL14 (OHARA) lanthanum crown |
| L25 | Biconvex Positive | FCD505 (HOYA) ED fluorophosphate crown |
| L26 | Positive Meniscus (2× Asph) | NBFD13 / M-NBFD130 (HOYA, 806407 code) |
| L31 | Biconvex Positive | FCD505 (HOYA) ED fluorophosphate crown |
| L32 | Biconcave Negative (2× Asph) | M-FD80-class / 689-312 moldable dense flint (HOYA; patent melt offset) |
Detailed analysis available in the interactive viewer above.