JP H04-015611 A, Numerical Example 1 — Tsunefumi Tanaka
| 7 ELEMENTS / 5 GROUPS |
| DESIGN f = 35.51 mm |
| DESIGN F/2.0 |
| ALL SPHERICAL |
The patent gives only the infinity state and no focus travel, so all spacings stay fixed and the production lens's 0.25 m close focus is not modeled.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | BACD5 (HOYA catalog equivalent; production supplier unspecified) |
| L2 | Biconvex Positive | S-LAH53 (OHARA catalog equivalent; production supplier unspecified) |
| L3 | Negative Meniscus | E-FD2 (HOYA catalog equivalent; production supplier unspecified) |
| L4 | Biconcave Negative | PBM25 (OHARA catalog equivalent; production supplier unspecified) |
| L5 | Biconcave Negative | S-TIH11 (OHARA catalog equivalent; production supplier unspecified) |
| L6 | Biconvex Positive | S-LAH66 (OHARA catalog equivalent; production supplier unspecified) |
| L7 | Biconvex Positive | S-LAH66 (OHARA catalog equivalent; production supplier unspecified) |