JP 2022-061515 A — Hitoshi Murakami
| 11 ELEMENTS / 10 GROUPS |
| DESIGN f = 87.30 mm |
| DESIGN F/2.90 |
| 2 ASPHERICAL SURFACES / 1 ELEMENT |
PUBLISHED endpoints: group L2 (surfaces 11–16) moves 1.3907 mm toward the object from infinity to the patent's near state; L1, the stop and L3 stay fixed. That near state is 1.793 m object to image at a magnification of −1/20, not the marketed 0.5 m (1:5) minimum focus, which the patent does not tabulate. Positions between the two printed states are linearly interpolated.
| Element | Type | Glass |
|---|---|---|
| L11 | Positive Meniscus | S-LAH96 (OHARA, coordinate equivalent) |
| L12 | Positive Meniscus | FCD1 (HOYA, coordinate equivalent) |
| L13 | Biconvex Positive | FCD1 (HOYA, coordinate equivalent) |
| L14 | Negative Meniscus | NBFD13 (HOYA, coordinate equivalent) |
| L15 | Positive Meniscus | FCD705 (HOYA, coordinate equivalent) |
| L21 | Negative Meniscus | NBFD11 (HOYA, coordinate equivalent) |
| L22 | Biconvex Positive (2× Asph) | S-FPL51 (OHARA, coordinate equivalent) |
| L23 | Biconvex Positive | TAC8 (HOYA, coordinate equivalent) |
| L31 | Biconcave Negative | PCD40 (HOYA, coordinate equivalent) |
| L32 | Negative Meniscus | FC5 (HOYA, coordinate equivalent) |
| L33 | Positive Meniscus | NBFD25 (HOYA, coordinate equivalent) |