JP 2017-161685 A, Example 1 — Ryosuke Imajima, Yasunari Fukuda, Toshinori Take, Takayuki Sensui
| 17 ELEMENTS / 13 GROUPS (18 modeled media) |
| f ≈ 19.4 mm |
| F/4.08 (design) / F/4 (marketed) |
| 2ω ≈ 119.2° (full image circle for ±12 mm shift) |
| 3 ASPHERICAL SURFACES (glass element + coated element) |
| 3 ED POSITIONS (catalog spectral proxies) |
Rear-group focus: Gr2 and aperture stop translate axially toward object (3.67 mm travel). Gr1 remains fixed relative to image plane.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | S-LAL14 (Ohara; catalog spectral proxy; production supplier unspecified) |
| L12 | Negative Meniscus | S-LAL14 (Ohara; catalog spectral proxy; production supplier unspecified) |
| L13 | Neg. Meniscus (2× Asph) | L-BAL42 (Ohara; catalog spectral proxy; production supplier unspecified) |
| L14 | Negative Meniscus | S-FPL51 (Ohara; catalog spectral proxy; production supplier unspecified) |
| L15 | Biconvex Positive | E-FD2 (Hoya; catalog spectral proxy; production supplier unspecified) |
| L16 | Biconcave Negative | S-LAH95 (Ohara; catalog spectral proxy; production supplier unspecified) |
| L17 | Negative Meniscus | S-LAH55V (Ohara; catalog spectral proxy; production supplier unspecified) |
| L18 | Biconvex Positive | S-NBH5 (Ohara; catalog spectral proxy; production supplier unspecified) |
| L19 | Positive Meniscus | E-FD2 (Hoya; catalog spectral proxy; production supplier unspecified) |
| L21 | Biconvex Positive | S-FTM16 (Ohara; catalog spectral proxy; production supplier unspecified) |
| L22 | Biconcave Negative | S-LAH66 (Ohara; catalog spectral proxy; production supplier unspecified) |
| L23 | Biconvex Positive | S-NSL36 (Ohara; approximate catalog spectral proxy; production supplier unspecified) |
| L24 | Negative Meniscus | TAFD35 (Hoya; catalog spectral proxy; production supplier unspecified) |
| L25 | Biconvex Positive | S-FPL51 (Ohara; catalog spectral proxy; production supplier unspecified) |
| L26 | Negative Meniscus | S-LAH55V (Ohara; catalog spectral proxy; production supplier unspecified) |
| L27 | Biconvex Positive | S-FPL51 (Ohara; catalog spectral proxy; production supplier unspecified) |
| L28 | Asph. Coating Layer (modeled resin) | Unidentified coating medium; resin interpretation; chemistry and supplier unspecified |
| L29 | Negative Meniscus | BSC7 (Hoya; catalog spectral proxy; production supplier unspecified) |