WO 2021/241230 A1 — Hiroki Harada
| 17 ELEMENTS / 15 GROUPS |
| f = 51.29 mm |
| F/1.23 |
| 2ω ≈ 45.6° |
| 3 ASPHERICAL SURFACES |
Patent Example 1: F1 moves 7.727 mm and F2 6.143 mm objectward relative to the front/rear groups. Source close object distance is 467.50 mm from the first surface, about 0.630 m from the modeled image plane. The 0.001 mm image-gap change follows rounded source stations; intermediate motion is interpolated.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | S-BSM81 (catalog equivalent; production supplier unspecified) |
| L12 | Positive Meniscus | FDS18 (catalog equivalent; production supplier unspecified) |
| L13 | Negative Meniscus | J-KZFH4 (catalog equivalent; production supplier unspecified) |
| L14 | Positive Meniscus | J-PSKH4 (catalog equivalent; production supplier unspecified) |
| L15 | Biconvex Positive | J-PSKH4 (catalog equivalent; production supplier unspecified) |
| L16 | Positive Meniscus | J-PSKH4 (catalog equivalent; production supplier unspecified) |
| L17 | Positive Meniscus | J-PSKH4 (catalog equivalent; production supplier unspecified) |
| L18 | Biconvex Positive | J-PSKH1 (catalog equivalent; production supplier unspecified) |
| L19 | Biconcave Negative | S-NBH53V (catalog equivalent; production supplier unspecified) |
| L21 | Negative Meniscus | S-NBH8 (catalog equivalent; production supplier unspecified) |
| L22 | Plano-Convex Positive | J-PSKH1 (catalog equivalent; production supplier unspecified) |
| L31 | Biconvex Pos. (1× Asph) | J-PSKH4 (approximate catalog equivalent; patent nd=1.59306, vd=67.0; supplier unspecified) |
| L32 | Biconvex Pos. (1× Asph) | S-LAH96 (catalog equivalent; production supplier unspecified) |
| L41 | Positive Meniscus | S-PHM52 (catalog equivalent; production supplier unspecified) |
| L42 | Biconvex Positive | J-LASFH9 (catalog equivalent; production supplier unspecified) |
| L43 | Biconcave Negative | N-KZFS4 (catalog equivalent; production supplier unspecified) |
| L44 | Biconcave Neg. (1× Asph) | J-BK7 (catalog equivalent; production supplier unspecified) |