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2023 Free Sample/Inquiry for Drawings Meniscus Lens Positive/Negative Meniscus Lens: Negative meniscus lens The negative meniscus lens is used for applications using infrared materials with a high refractive index. These lenses serve as substitutes for other negative lenses with ...

2024 Free Sample/Inquiry for Drawings 3m-5A Mc 500mm F/8 Mto Mirror-Meniscus Soviet Lens Multilayer: negative focal lengths. On the aspect of shape, it can be divided into convex and concave meniscus lens. On the aspect of the effect, it can be divided into diverging and converging meniscus lens. ...

2023 Free Sample/Inquiry for Drawings Biconcave Lens High Precision Optical Components: The biconcave lens , also named double concave lens, is usually made of flint glass and used for beam divergence. It’s focal length is negative but the parallel incident ray diverges outward. The two ...

2023 Free Sample/Inquiry for Drawings Plano-Concave Lens OEM Optical Lenses: A plano-concave lens is a lens that has a flat surface on one side and a concave surface on the other side. The focal length of a plane-concave lens is negative, allowing the beam to diverge. ...

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