double convex lens

3 month ago

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6 month

Product details

Double convex lens also known as bi convex lens is the most typical positive lens in an optical system. both sides are convex, with the middle part being thick and edges being thin, have positive focal length, two convex surfaces with equal radius of curve, commonly used in camera,microscopes and telescopes, also focusing or alignment on laser processing and fiber coupling.

Difference between plano convex lens and double convex lens

Dimension	Double convex lens	plano convex lens( flat convex)
Structure	bi convex symmetry	one flat and one convex( asymmetric)
Aberration	when the object image is conjugate, the spherical aberration is the smallest	when the convex surface faces the parallel light, the spherical aberation is the smallest
Application	general imaging,symmetry system	alignment, focusing, asymmetric optical path

Bi convex lens and Bi concave lens are two fundamentally different types of basic spherical lens in optics, with completely opposite functions, the former converges light, while the latter diverges light

Comparision bi convex lens and bi concave lens

Characteristics	bi convex lens( double convex lens)	bi concave lens( double concave lens)
Shape	middle is thick while the edges are thin	the middle part is thin while the edges are thick
Focal length	positive lens	negative lens
optical effect	converging parallel light	divergent parallel light
imaging	can form real images or virtual images	only an illusory image( inverted and magnified)
Typical application	magnifying glass ,camera lens	beam expanding lens, myopia correction

In actual optical systems, bi convex lens and bi concave lens often used in combination

beam expanding system: 2 concave lens and 2 convex lens combination together is used to achieve changes in the beam diameter

Abberation correction: utilizing the negative optical power of the bi concave lens to balance the spherical aberration or field curvature caused by the bi convex lens

Specifications

Substrate	K9, fused silica, sapphire, znse, caf2 ,CDGM optical glass
Size	5-400mm custom made
Shape	plano convex, double convex, bi convex, bi concave, meniscus, achromatic, aspheric, cylindrical lens etc
Focal Length	+/-1%
S/D	40/20
Surface Accuracy	λ/4
Centration	<3'
Bevel	0.2*45degree
Dimension tolerance	+/-0.1mm
Coating	AR/BBAR accordingly custom made

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CCRQ Optics Co.,Ltd

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6 month

Main Product: Sapphire window, Spherical Lens, Optical mirror, Optical Prism , CaF2 window, Fused Silica Window

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