JP 2017-227799 A — Yasunari Fukuda, Akiko Furuta, Toshinori Take, Takayuki Sensui
| 14 ELEMENTS / 11 GROUPS |
| f = 28.41 mm |
| F/1.45 |
| 2ω = 75.42° |
| 4 ASPHERICAL SURFACES (3 ELEMENTS) |
Patent near station: 25 cm object-to-image. Gr2 and stop move 6.30 mm objectward; Gr1 has a 0.02 mm residual from the published gaps. Intermediate motion is interpolated.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | S-TIM28 (inferred coordinate counterpart; OHARA) |
| L12 | Negative Meniscus | N-LAK8 (inferred coordinate counterpart; Schott) |
| L12r | Negative Meniscus (1× Asph) | UV-curing resin (composite) |
| L13 | Biconvex Positive | S-TIH53 (inferred coordinate counterpart; OHARA) |
| L14 | Biconcave Negative | N-BAK4 (inferred coordinate counterpart; Schott catalog-equivalent; patent supplier unspecified) |
| L15 | Biconvex Positive | S-LAH58 (inferred coordinate counterpart; OHARA) |
| L16 | Biconvex Positive | S-LAH66 (inferred coordinate counterpart; OHARA) |
| L21 | Positive Meniscus | S-LAL18 (inferred coordinate counterpart; OHARA) |
| L22 | Biconvex Positive | S-LAL14 (inferred coordinate counterpart; OHARA) |
| L23 | Biconvex Positive | S-FPM2 (inferred coordinate counterpart; OHARA) |
| L24 | Biconcave Negative | J-KZFH9 (inferred coordinate counterpart; Hikari) |
| L25 | Biconcave Negative | 806333 — dense flint (inferred coordinate counterpart; patent coordinate; vendor unresolved) |
| L26 | Biconvex Pos. (1× Asph) | L-LAH90 (inferred coordinate counterpart; OHARA) |
| L27 | Biconvex Positive | S-FPM2 (inferred coordinate counterpart; OHARA) |
| L28 | Pos. Meniscus (2× Asph) | S-LAL13 (inferred coordinate counterpart; OHARA) |