F theta objective
The utility model relates to a F theta objective, this F theta objective include four simple lenses, have: as the biconcave lens have focus f1 first simple lens L1, as meniscus have focus f2 secondsimple lens L2, as plano -convex lens L3 have focus f3 third simple lens L3, as the fourth simple lens...
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| Format: | Patent |
| Sprache: | chi ; eng |
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