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LENSES
Optical lenses come in various types based on their shape and function. Here are the main types of optical lenses:
Concave Lenses (Diverging Lenses)
These lenses are thinner in the center than at the edges and diverge incoming light rays.
Convex Lenses
These lenses are thicker in the center than at the edges and converge incoming light rays to a point (focus).
Gradients-Index (GRIN) Lenses
These lenses have a refractive index that varies gradually within the lens material. Common in fiber optics and compact imaging systems.
Aspherics Lenses
These have a non-spherical surface profile, reducing optical aberrations like spherical aberration. Used in cameras, telescopes, and high-end optics.
Compound Lenses
Combinations of multiple lenses (convex, concave, or both) designed to reduce optical aberrations. Used in microscopes, cameras, and telescopes.
Fresnel Lenses
Made of a series of concentric grooves, Fresnel lenses are flat and lightweight alternatives to thick conventional lenses. Used in lighthouses, overhead projectors, and VR headsets.