US 3,037,426 — Edgard Hugues
| 7 ELEMENTS / 7 GROUPS |
| 3 DIOPTRIC SYSTEMS |
| 1.9mm |
| f/1.9 |
| 197° FIELD |
| 8.7 mm CIRCULAR IMAGE (MARKETED) |
| 1 ASPHERICAL SURFACE |
Fixed focus; no moving groups are modeled.
| Element | Type | Glass |
|---|---|---|
| L16 | Negative Meniscus | N-LAK9-class (coordinate-compatible spectral proxy; supplier unproven) |
| L17 | Plano-Parabolic Negative (1× Asph) | M-TAF31-class (coordinate-compatible spectral proxy; supplier unproven) |
| L18 | Biconvex Positive | Unmatched (681320-class; supplier unspecified) |
| L19 | Biconvex Positive | N-LAK9-class (coordinate-compatible spectral proxy; supplier unproven) |
| L20 | Biconcave Negative | Unmatched (733284-class; supplier unspecified) |
| L21 | Positive Meniscus | N-SK16-class (coordinate-compatible spectral proxy; supplier unproven) |
| L22 | Biconvex Positive | N-SK16-class (coordinate-compatible spectral proxy; supplier unproven) |