JP2023063766A EXAMPLE 1 — COSINA / OGINO
| 9 ELEMENTS / 7 GROUPS |
| f ≈ 50.0 mm |
| F/1.0 |
| 2ω ≈ 46.8° |
| 3 ASPHERICAL SURFACES |
Unit focus assumed — entire lens advances as one piece. Patent does not disclose a floating-element mechanism for this embodiment.
| Element | Type | Glass |
|---|---|---|
| L1 | Pos. Meniscus (1× Asph) | LaSF (LASF35 melt) |
| L2 | Positive Meniscus | LaSF family |
| L3 | Negative Meniscus | SF6 / S-TIH6 (OHARA) |
| L4f | Biconcave Negative | Dense flint (SF14 family) |
| L4r | Biconvex Positive | S-LAH58 (OHARA) |
| L5 | Biconvex Positive | S-LAH58 (OHARA) |
| L6f | Biconvex Positive | S-LAH58 (OHARA) |
| L6r | Biconcave Negative | Standard crown (selected melt) |
| L7 | Neg. Meniscus (2× Asph) | LaF/LaSF boundary |
Detailed analysis available in the interactive viewer above.