JP 2002-162564 A — Akira Harada
| PATENT EXAMPLE: 21 ELEMENTS / 19 GROUPS |
| DESIGN 72.50-194.98 mm |
| DESIGN f/2.9 |
| ALL-SPHERICAL |
| TRANSVERSE IS UNIT g5B |
Patent g2 is the axial focusing unit, but Example 1 has no published close-focus spacing table. This data model therefore keeps all internal focus endpoints identical; 1.4 m is Canon production metadata only.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | 750353 coordinate class (spectral surrogate: OHARA S-LAM7) |
| L2 | Biconvex Positive | 497816 fluorophosphate-crown coordinate class (spectral surrogate: OHARA S-FPL51) |
| L3 | Positive Meniscus | 497816 fluorophosphate-crown coordinate class (spectral surrogate: OHARA S-FPL51) |
| L4 | Negative Meniscus | 847238 dense-flint coordinate class (spectral surrogate: OHARA S-TIH53) |
| L5 | Positive Meniscus | 487702/704 fluor-crown coordinate class (spectral surrogate: OHARA S-FSL5) |
| L6 | Negative Meniscus | 806409 lanthanum-flint coordinate class (spectral surrogate: OHARA S-LAH53) |
| L7 | Biconcave Negative | 487702/704 fluor-crown coordinate class (spectral surrogate: OHARA S-FSL5) |
| L8 | Positive Meniscus | 847238 dense-flint coordinate class (spectral surrogate: OHARA S-TIH53) |
| L9 | Biconcave Negative | 713539 lanthanum-crown coordinate class (spectral surrogate: OHARA S-LAL8) |
| L10 | Biconvex Positive | 497816 fluorophosphate-crown coordinate class (spectral surrogate: OHARA S-FPL51) |
| L11 | Negative Meniscus | 667330 flint coordinate class (spectral surrogate: OHARA S-TIM39 legacy) |
| L12 | Plano-Convex Positive | 847238 dense-flint coordinate class (spectral surrogate: OHARA S-TIH53) |
| L13 | Positive Meniscus | 773496 lanthanum-flint coordinate class (spectral surrogate: OHARA S-LAH66) |
| L14 | Negative Meniscus | 847238 dense-flint coordinate class (spectral surrogate: OHARA S-TIH53) |
| L15 | Biconvex Positive | 603607 dense-crown coordinate class (spectral surrogate: OHARA S-BSM14) |
| L16 | Biconvex Positive | 847238 dense-flint coordinate class (spectral surrogate: OHARA S-TIH53) |
| L17 | Biconcave Negative | 694532 lanthanum-crown coordinate class (spectral surrogate: OHARA L-LAL13) |
| L18 | Biconcave Negative | 694532 lanthanum-crown coordinate class (spectral surrogate: OHARA L-LAL13) |
| L19 | Biconvex Positive | 497816 fluorophosphate-crown coordinate class (spectral surrogate: OHARA S-FPL51) |
| L20 | Negative Meniscus | 834372 lanthanum-flint coordinate class (spectral surrogate: OHARA S-LAH60) |
| L21 | Biconvex Positive | 834372 lanthanum-flint coordinate class (spectral surrogate: OHARA S-LAH60) |