CN 118244463 A — Kuang Jian, Ouyang Xia, Ye Bo, Li Zenghui, Liu Xiaojuan
| 8 ELEMENTS / 6 GROUPS |
| DESIGN f = 51.76 mm |
| DESIGN F/1.45 |
| 2 ASPHERICAL SURFACES / 1 ELEMENT |
Floating focus: G1 (L1-L6 with the stop) moves 9.32 mm toward the object while G2 (L7, L8) stays fixed to the image plane, so D11 opens from 0.39 mm at infinity to 9.71 mm at the patent's near state (object 370 mm in front of the first surface, about 0.45 m from the image plane). Only these two states are published; intermediate positions are interpolated, not a measured cam law. The patent's rounded values leave a small residual defocus at the near state.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | Unmatched (native nd=1.95000, vd=32.28; no tight six-vendor coordinate match) |
| L2 | Positive Meniscus | Unmatched (native nd=1.50000, vd=81.60; no tight six-vendor coordinate match) |
| L3 | Negative Meniscus | Unmatched (native nd=1.85000, vd=25.15; no tight six-vendor coordinate match) |
| L4 | Positive Meniscus (2x Asph) | Unmatched (native nd=1.77000, vd=49.24; no tight six-vendor coordinate match) |
| L5 | Biconcave Negative | Unmatched (native nd=1.60000, vd=38.01; no tight six-vendor coordinate match) |
| L6 | Biconvex Positive | Unmatched (native nd=1.88000, vd=39.22; no tight six-vendor coordinate match) |
| L7 | Biconcave Negative | Unmatched (native nd=1.65000, vd=33.89; no tight six-vendor coordinate match) |
| L8 | Biconvex Positive | Unmatched (native nd=1.88000, vd=39.22; no tight six-vendor coordinate match) |