JP 2002-236254 A, Numerical Example 2 — Norikazu Yokoi, Tetsusuke Kusakawa, Shizuka Takemoto
| 9 ELEMENTS / 7 GROUPS |
| DESIGN f = 25.0-67.6 mm |
| DESIGN F/3.62-5.79 |
| 1 ASPHERICAL SURFACE (HYBRID RESIN LAYER) |
The patent prints infinity spacings at wide, middle and tele; focusing is not modeled. The intermediate zoom positions are an inferred reconstruction, not the factory cam: the G1–stop and stop–G2 spacings follow linear laws between the printed stations, the stop moves with G3 as the printed spacings require, and the back focus follows paraxial infinity focus along the path, keeping the printed stations' focus residuals of under 0.05 mm. The patent's second flare stop is not modeled. The marketed minimum focus distance is 0.4 m.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | TAF3 (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L2 | Negative Meniscus | TAF1 (HOYA coordinate-equivalent class; supplier unconfirmed) |
| R1 | Neg. Meniscus Resin Layer (1× Asph) | Unmatched (hybrid optical resin; spectrum unpublished) |
| L3 | Biconvex Positive | S-TIM25 (OHARA coordinate-equivalent class; supplier unconfirmed) |
| L4 | Biconvex Positive | K-LaK14 (SUMITA coordinate-equivalent class; supplier unconfirmed) |
| L5 | Biconvex Positive | S-FSL5 (OHARA coordinate-equivalent class; supplier unconfirmed) |
| L6 | Biconcave Negative | NBFD10 (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L7 | Biconvex Positive | BSC7 (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L8 | Positive Meniscus | BACED5 (HOYA coordinate-equivalent class; supplier unconfirmed) |
| L9 | Negative Meniscus | TAF1 (HOYA coordinate-equivalent class; supplier unconfirmed) |