JP 1999-030743 A, Numerical Example 6 — Makoto Misaka
| 11 ELEMENTS / 9 GROUPS |
| PATENT f = 24.6 mm, F/1.45, 2ω = 82.7° |
| 1 UD ELEMENT / 1 GROUND ASPHERICAL ELEMENT |
| FLOATING REAR FOCUS (PRODUCTION) |
Production floating rear focus. Patent ¶0039 prefers fixed B1 with B2a and B2b moving objectward while approaching one another; finite-focus spacings are not published and are not modeled.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus, convex to object | S-LAL14 (OHARA; 697/555 class equivalent) |
| L2 | Negative Meniscus, convex to object | S-LAL14 (OHARA; 697/555 class equivalent) |
| L3 | Biconvex Positive | N-LAK8 (SCHOTT; 713/538 class equivalent) |
| L4 | Positive Meniscus, convex to object | S-TIH53 (OHARA; 847/238 dense-flint class equivalent) |
| L5 | Negative Meniscus, convex to object | S-FPL51 (qualified spectral proxy for published anomalous medium; historical supplier and chemistry unconfirmed) |
| L6 | Biconvex Positive | S-LAH65V (OHARA; 804/466 dense lanthanum-flint class equivalent) |
| L7 | Biconcave Negative | S-TIH10 (approximate spectral proxy to printed 1.728250/28.64; published C/F/g retained; supplier unconfirmed) |
| L8 | Biconcave Negative | S-TIH6 (OHARA; 805/254 SF6-class equivalent) |
| L9 | Biconvex Positive (1× Asph) | S-LAH55V (OHARA; 835/427 dense lanthanum-flint class equivalent) |
| L10 | Positive Meniscus, convex to image | J-SK14 (HIKARI catalog curve; qualified full-spectrum proxy; source nd emendation retained; historical supplier, melt and chemistry unspecified) |
| L11 | Positive Meniscus, convex to image | S-LAH66 (qualified OHARA 773/496 spectral proxy; historical supplier unconfirmed) |