US 2022/0066176 A1, sole example — Stefan Roth, Kathrin Keller
| 10 ELEMENTS / 5 GROUPS |
| f = 35.0 mm (e-line, patent f = 1 × 35) |
| F/2.0 |
| 2ω = 62.2° |
| 4 ASPHERICAL SURFACES (3 ELEMENTS) |
Floating rear group: VG+BL+MG translate forward together; HG translates forward with shorter travel (assumed 70% of the front assembly — the patent gives the direction but no travel). Differential motion compensates coma and astigmatic difference at close range.
| Element | Type | Glass |
|---|---|---|
| L1 | Biconvex Positive (1× Asph) | S-LAH89 (OHARA) — patent-named example; catalog ne 1.8565 / νe 40.5 |
| L2 | Biconcave Negative | N-KZFS5 (Schott) / S-NBH5 (OHARA) — catalog equivalents (ne 1.65803 / νe 39.5) |
| L3 | Biconcave Negative | N-KZFS5 (Schott) / S-NBH5 (OHARA) — catalog equivalents (ne 1.65803 / νe 39.5) |
| L4 | Biconvex Positive | S-LAH58 (OHARA) — catalog equivalent (ne 1.88815 / νe 40.5) |
| L5 | Biconvex Positive | S-FPL51 (OHARA) — catalog equivalent (ne 1.49845 / νe 81.2) |
| L6 | Biconcave Negative | N-KZFS5 (Schott) / S-NBH5 (OHARA) — catalog equivalents (ne 1.65803 / νe 39.5) |
| L7 | Biconvex Positive | S-FPL51 (OHARA) — catalog equivalent (ne 1.49845 / νe 81.2) |
| L8 | Biconvex Positive (1× Asph) | S-LAH89 (OHARA) — same row as L1; catalog ne 1.8565 / νe 40.5 |
| L9 | Biconcave Negative | N-KZFS5 (Schott) / S-NBH5 (OHARA) — catalog equivalents (ne 1.65803 / νe 39.5) |
| L10 | Neg. Meniscus (2× Asph) | L-BAL42 (OHARA PGM) class — nearest catalog at e (ne 1.5855 / νe 59.1 vs patent 1.583 / 59) |