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Achromatic Doublet Lens: A Complete Buying Guide

An achromatic doublet — often just called an achromat or achromatic lens — is made of two glass elements with different refractive index and dispersion, cemented together. That combination brings two design wavelengths to a common focal point, which sharply reduces chromatic aberration compared with a single lens element. It's the go-to correction lens for any system that has to perform across...

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Meniscus Lens Guide: Positive vs. Negative & Applications

A meniscus lens has one convex surface and one concave surface — the shape gives it its name, since it looks like a crescent moon in cross-section. Meniscus lenses are rarely used on their own; they're almost always paired with other lenses to correct aberration and refine an existing light path. Key Specifications at a Glance Parameter Typical Value Substrate N-BK7, UV...

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Plano-Convex vs. Biconvex Lens: Differences & Focal Length Formulas

Plano-convex and biconvex lenses are the two most common positive (converging) lens shapes. Both bend parallel light rays to a focus; the difference is that a plano-convex lens has only one curved surface, while a biconvex lens has two. Key Specifications at a Glance Parameter Typical Value Substrate N-BK7, UV fused silica Diameter 5 mm–100 mm Focal length range 15 mm–1000 mm...

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Spherical Singlet Lenses: Types, Specs & Applications

A spherical singlet lens has one or two surfaces ground to a constant radius of curvature — the simplest and most widely used optical lens design. Because a sphere is easier to generate, polish, and test than any other surface, spherical singlets remain the default choice for focusing, collimating, and imaging applications across the visible and near-IR range. Key Specifications at a...

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Optical Lens Buying Guide: How to Choose the Right Lens

Optical lenses converge or diverge light and sit at the core of imaging, illumination, laser, and inspection systems. Before you order one, it helps to match the lens type, material, and precision grade to the actual application — the checklist below covers the decisions that matter most. Key Specifications at a Glance Parameter Common Options Common substrates N-BK7, UV fused silica Diameter...

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