WO 2020/105104 A1 — Takeru Uehara
| 21 ELEMENTS / 18 GROUPS |
| f = 71.5–196 mm |
| F/2.88 |
| 2ω = 33.8°–12.3° |
| 2 ASPHERICAL SURFACES |
Patent focus stations: G7 moves toward the image and G8 toward the object. The tabulated gaps imply approximately 1.0 m object-to-image distance; tele travel is ±11.53 mm.
| Element | Type | Glass |
|---|---|---|
| L11 | Negative Meniscus | S-LAH99 (catalog counterpart) |
| L12 | Plano-Convex Positive | J-FKH1 (inferred catalog counterpart; low-dispersion glass) |
| L13 | Positive Meniscus | CaF2 Fluorite |
| L21 | Negative Meniscus | S-PHM53 (catalog counterpart) |
| L22 | Biconcave Negative | J-FKH1 (inferred catalog counterpart; low-dispersion glass) |
| L23 | Positive Meniscus | J-SFH4 (inferred catalog counterpart; production material unspecified) |
| L24 | Biconcave Negative | J-FKH1 (inferred catalog counterpart; low-dispersion glass) |
| L31 | Positive Meniscus | FDS18 (catalog counterpart) |
| L41 | Biconvex Positive | J-FKH1 (inferred catalog counterpart; low-dispersion glass) |
| L42 | Positive Meniscus | J-FKH1 (inferred catalog counterpart; low-dispersion glass) |
| L51 | Biconcave Negative | N-SF66 (catalog counterpart) |
| L52 | Biconvex Positive | J-FKH1 (inferred catalog counterpart; low-dispersion glass) |
| L61 | Negative Meniscus | J-LASF021 (catalog counterpart) |
| L62 | Biconvex Positive (1× Asph) | J-PSKH4 (approximate catalog counterpart) |
| L63 | Negative Meniscus | S-TIM2 (catalog counterpart) |
| L64 | Positive Meniscus | J-LAF016 (catalog counterpart) |
| L71 | Positive Meniscus | FDS18 (catalog counterpart) |
| L72 | Negative Meniscus | N-LAK8 (catalog counterpart) |
| L81 | Biconvex Positive | J-LASFH9 (catalog counterpart) |
| L91 | Neg. Meniscus (1× Asph) | N-BK7 (approximate catalog counterpart) |
| L92 | Negative Meniscus | N-SK11 (catalog counterpart) |