JP 2014-41222 A — Numerical Example 1
| 16 elements / 13 groups |
| 24.90-68.14 mm patent design |
| f/2.8 nominal; F2.92 design |
| 2 aspherical surfaces |
| 1 ED + 2 anomalous-dispersion glass elements |
Internal focus by imageward translation of the fifth group; close-focus spacings are paraxially solved because JP 2014-41222 A publishes infinity-focus spacings only.
| Element | Type | Glass |
|---|---|---|
| L11 | Neg. Meniscus (front asph) | S-LAH66 (OHARA) |
| L12 | Biconcave Negative | S-LAH66 (OHARA) |
| L13 | Positive Meniscus | Unmatched (patent-defined high-index anomalous short flint) |
| L21 | Negative Meniscus | S-TIH6 (OHARA) / SF6 class |
| L22 | Biconvex Positive | S-LAH66 (OHARA) |
| L23 | Biconvex Positive | S-LAH55V (OHARA) |
| L24 | Positive Meniscus | S-LAL14 (OHARA) / N-LAK14 class |
| L31 | Biconcave Negative | S-LAH58 (OHARA) |
| L32 | Biconcave Negative | S-LAL10 (OHARA) |
| L33 | Biconvex Positive | S-TIH6 (OHARA) / SF6 class |
| L41 | Negative Meniscus | Unmatched (patent-defined high-index anomalous short flint) |
| L42 | Biconvex Positive | S-FPL51 (OHARA) / FCD1 class |
| L43 | Biconvex Positive | Unmatched (light crown, patent indices) |
| L51 | Plano-Convex Positive | S-TIH53 (OHARA) / SF57 class |
| L52 | Biconcave Negative | S-LAH60 (OHARA) |
| L6 | Biconvex Positive (rear asph) | S-BAL42 (OHARA) / D-ZK2 class |
Detailed analysis available in the interactive viewer above.