US 2012/0056976 A1 — Yong-jae Lee, Young-woo Park
| 6 ELEMENTS / 4 GROUPS |
| 20.2898 mm MODELED EFL |
| f/2.8563 MODELED APERTURE |
| 75.0786° PUBLISHED FULL FIELD |
| 1 ASPHERICAL SURFACE |
| PUBLISHED UNIT FOCUS |
PUBLISHED unit focus: all six elements translate together by 3.647 mm toward the object from infinity to 0.17 m. The omitted rear plates are represented by an air-equivalent final spacing with a disclosed uniform +0.028235 mm paraxial closure correction.
| Element | Type | Glass |
|---|---|---|
| L1 | Negative Meniscus | NBF1 catalog equivalent; production supplier unspecified |
| L2 | Biconcave Negative | E-C3 catalog equivalent; production supplier unspecified |
| L3 | Biconvex Positive | S-LAH58 catalog equivalent; production supplier unspecified |
| L4 | Biconvex Positive | N-LASF44 catalog equivalent; production supplier unspecified |
| L5 | Biconcave Negative | E-FD15 catalog equivalent; production supplier unspecified |
| L6 | Positive Meniscus (1× Asph) | K-VC80-M catalog equivalent (patent coordinate; production supplier unspecified) |