JP 2001-183581 A — Hideyuki Suga
| 8 ELEMENTS / 7 GROUPS |
| f = 149.790 mm (DESIGN) |
| F/2.88 (DESIGN) |
| 2ω = 26.5° |
| INNER FOCUS |
CONSTRAINED_RECONSTRUCTION: G1 is fixed; G2 (L4-L7 plus STO) and G3 (L8) move objectward. The 1.0 m endpoint preserves the fixed image plane and patent terminal X2/X3 = 0.7967231325, yielding |beta| = 0.1926159803. The patent-published |beta| = 0.15 state is not stored as the production endpoint.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | S-FPL51 (OHARA catalog model; supplier not established) |
| L2 | Positive Meniscus | S-PHM52 (OHARA catalog model; supplier not established) |
| L3 | Negative Meniscus | S-NBM51 (OHARA catalog model; supplier not established) |
| L4 | Positive Meniscus | S-PHM52 (OHARA catalog model; supplier not established) |
| L5 | Biconcave Negative | S-NBH8 (OHARA catalog model; supplier not established) |
| L6 | Biconcave Negative | S-TIM5 (OHARA catalog model; supplier not established) |
| L7 | Biconvex Positive | Unmatched (nd=1.806098, νd=40.34; no exact current catalog identity) |
| L8 | Biconvex Positive | S-LAH66N (OHARA catalog model; supplier not established) |