WO 2019/116563 A1 — Masashi Yamashita, Tomoki Ito, Hiroshi Yabumoto, Hiroshi Yamamoto, Satoshi Miwa, Keisuke Tsubonoya, Ayumu Makida, Takeru Uehara
| 14 ELEMENTS / 9 GROUPS |
| f = 102.148 mm |
| F/1.45 |
| 2ω = 23.842° |
| ALL SPHERICAL |
Inner focus (IF). G2 cemented doublet (L21+L22) translates 12 mm toward the image side from infinity to the patent close station (β = −0.132, approximately 1 m). G1 and G3 fixed. Lens does not change external length.
| Element | Type | Glass |
|---|---|---|
| L11 | Pos. Meniscus, convex to obj | S-FPM2 equiv. (Ohara); catalog equivalent, production supplier unspecified |
| L12 | Biconvex Positive (ED) | S-FPL51 (Ohara); catalog equivalent, production supplier unspecified |
| L13 | Biconvex Positive (ED) | S-FPL51 (Ohara); catalog equivalent, production supplier unspecified |
| L14 | Biconcave Negative | S-NBH8 (Ohara); catalog equivalent, production supplier unspecified |
| L21 | Pos. Meniscus, concave to obj | Unmatched APD medium (patent optical constants; supplier unspecified) |
| L22 | Biconcave Negative | S-BSL7 (Ohara) / N-BK7 equiv.; catalog equivalent, production supplier unspecified |
| L31 | Biconvex Positive (near-plano R) | S-LAH79 equiv. (Ohara); catalog equivalent, production supplier unspecified |
| L32 | Biconvex Positive | S-LAL14 (Ohara); catalog equivalent, production supplier unspecified |
| L33 | Biconcave Negative | J-SF1 catalog spectral proxy (patent dPgF retained; production supplier unspecified) |
| L34 | Biconvex Positive (ED) | S-FPL51 (Ohara); catalog equivalent, production supplier unspecified |
| L35 | Biconcave Negative | S-NBH8 (Ohara); catalog equivalent, production supplier unspecified |
| L36 | Biconvex Positive | S-LAH96 (Ohara); catalog equivalent, production supplier unspecified |
| L37 | Biconcave Negative | E-FL5 (HOYA); catalog equivalent, production supplier unspecified |
| L38 | Biconvex Positive | S-LAH79 equiv. (Ohara); catalog equivalent, production supplier unspecified |