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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.
Detail Information
| Items/Categories | 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% |
| Bevel | 0.1-0.25mm*45° | 0.1-0.25mm*45° |
| Coating | anti-reflective coating ( AR/AR ), customized available | |
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.
