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Bi-concave (BCV) Lens / Double Concave (DCV) Lens, custom

Bi-concave (BCV) Lens / Double Concave (DCV) Lens, custom

 The Bi-Concave / Double Concave Lens are used to expand light beams or to increase focal length in existing systems. The BCV / DCV lens is normally used in combination with other lenses. In a single lens application you should consider using BCV / DCV lens in preference to a single plano-concave lens if the magnification lies in the region. They are widely used in telescope, collimators, optical transceivers, magnifiers, radiometers and condensers.

   Microwork offers various AR coated and uncoated bi-concave / double concave lenses. These BCV / DCV lenses are usually made of following materials:

     BK7 glass,Sapphire crystal, UV fused silica, Corning 7980, JGS1, Quartz crystal, Germanium ( Ge ) monocrystal, Silicon monocrystal, ZnSe, Barium Fluoride ( BaF2 ), Calcium Fluoride ( CaF2 ), ZnS, Pyrex, BOROFLOAT, float glass, etc.

 Microwork also provide custom double concave lens , such as a double concave lens with a cut shape ( special cutting lenses ), rectangular, step edge and so on.

Surface Quality: 80/50, 60/40, 40/20, 20/10, 10/5.

Coating: We provide different single layer or mulitiple anti-reflecting (AR) coating against differrent requirements. Customized available.


Precision Standard
Size Range Dia10-200mm Dia5-300mm
Diameter Tolerance +0/-0.05mm +0/-0.1mm
Thickness Tolerance +/-0.05mm +/-0.1mm
Centering Tolerance <1´ 3´-5´
Surface Quality 40/20, 20/10 60/40
Surface Accuracy 0.5-0.2 3-0.5

Clear Aperture

>85% >85%


0.1-0.25mm*45° 0.1-0.25mm*45°


anti-reflective coating ( AR/AR ), customized available