LENSES

Description:

Lens is a transparent optical component consisting of one or more pieces of optical glass with surfaces so curved (usually spherical) that they serve to converge or diverge the transmitted rays from an object, thus forming a real or virtual image of that object.

Core Optronics supplies:

Plano Convex Lenses;
Double Convex Lenses;
Plano Concave Lenses;
Double Concave Lenses;
Achromatic Lenses;
Ball Lenses.

Features and Applications:

Lenses	Materials	Property and Application
Plano-convex	BK7;	Positive focus length. Most suitable where one conjugate is more than five times the other.
	Fused Silica;
	Sapphire;
	CaF₂
Double-convex	BK7;	Most suitable where the conjugates are on opposite sides of the lenses and the ratio of the distances is less than 5:1.
	Fused Silica

Plano-concave	BK7;	Negative lens with the form most suitable where one conjugates is more than five times the other.
	Fused Silica;
	Sapphire;
	CaF₂
Double-concave	BK7;	Negative lens with the form most suited to producing diverging light or a virtual image, where the input light is converging.
	Fused Silica

Meniscus Positive	BK7	These lenses may be used to increase the numerical aperture of a positive lens assembly, without an undue increase in the aberrations.
Meniscus Negative	BK7	The best lens form where one conjugates is relatively far from the lens or where both conjugates are the same size of the lens.
Cylindrical		Used to provide focusing power in one section only. For illumination or detection of light from line sources. Also used to anamorphic compression of beams and images.
	BK7;
	Fused Silica

LENSES

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