US 2017/0010441 A1, Example 1 — Masato Kondo, Takashi Suzuki
| 9 ELEMENTS / 6 GROUPS |
| DESIGN f = 35.326 mm |
| DESIGN F/2.09 |
| PATENT 2ω = 47.2° |
| 4 ASPHERICAL SURFACES |
Only the published infinity prescription is modeled. G2/L21 moves toward the image for nearer focus, but the patent does not supply travel distances.
| Element | Type | Glass |
|---|---|---|
| L11 | Positive Meniscus | S-LAH58 catalog proxy; 883408 — dense lanthanum-flint class (supplier unconfirmed) |
| L12 | Plano-Convex Positive | J-LASKH2 catalog proxy; 755523 — lanthanum-crown class (supplier unconfirmed) |
| L13 | Plano-Concave Negative | 893204 — dense-flint class; S-NPH4 coordinate match (supplier unconfirmed) |
| L21 | Biconcave Negative | J-LASKH2 catalog proxy; 755523 — lanthanum-crown class (supplier unconfirmed) |
| L31 | Biconvex Positive (2× Asph) | M-PCD4 catalog proxy; 619639 — low-dispersion precision-molding crown class (supplier unconfirmed) |
| L32 | Positive Meniscus | J-LASF016 catalog proxy; 773496 — lanthanum-flint class (supplier unconfirmed) |
| L33 | Biconcave Negative | J-F5 catalog proxy; 603380 — flint class (supplier unconfirmed) |
| L34 | Biconvex Positive | J-LASF016 catalog proxy; 773496 — lanthanum-flint class (supplier unconfirmed) |
| L35 | Negative Meniscus (2× Asph) | L-BSL7 catalog proxy (low-Tg crown; supplier unconfirmed) |