JP 2022-128635 A, Example 1 — Tatsuya Moriyama, Yuki Shibata
| 8 ELEMENTS / 6 GROUPS |
| DESIGN f = 34.45 mm |
| DESIGN F/1.23 |
| ALL SPHERICAL |
PUBLISHED unit focus: the whole optical assembly extends 4.947 mm toward the object, the mechanism Cosina states, and only the back gap changes. The close endpoint is the patent's printed state (Table 1: magnification 0.1436, ZD0 = 240.11 mm from surface 1, BF 20.826 mm, 298.886 mm object-to-image); the production specification is 0.3 m at 1:6.7.
| Element | Type | Glass |
|---|---|---|
| L1 | Positive Meniscus | TAFD55 (HOYA catalog equivalent; production supplier unspecified) |
| L2 | Positive Meniscus | J-LASF08A (Hikari catalog equivalent; production supplier unspecified) |
| L3 | Negative Meniscus | S-TIH53 (OHARA catalog equivalent; production supplier unspecified) |
| L4 | Positive Meniscus | NBFD30 (HOYA catalog equivalent; production supplier unspecified) |
| L5 | Positive Meniscus | TAFD55 (HOYA catalog equivalent; production supplier unspecified) |
| L6f | Biconcave Negative | S-TIH53 (OHARA catalog equivalent; production supplier unspecified) |
| L6r | Biconvex Positive | J-LASF08A (Hikari catalog equivalent; production supplier unspecified) |
| L7 | Biconvex Positive | TAFD55 (HOYA catalog equivalent; production supplier unspecified) |