Double-Concave Lens
A double-concave lens is compose of two concave surface, has a negative focal length and are best used to diverge a converging beam. Similar to a plano-concave lens, a bi-concave lens can diverge a collimated beam to a virtual focus like a beam expander.
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Double-Concave Lens |
A double-concave lens is compose of two concave surface, has a negative focal length and are best used to diverge a converging beam. Similar to a p... |
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