BK7 BiConvex lens
Description
Lenses are classified by the curvature of the two optical surfaces. A lens is biconvex (or double convex, or just convex) if both surfaces are convex. If both surfaces have the same radius of curvature, the lens is equiconvex. A lens with two concave surfaces is biconcave (or just concave). If one of the surfaces is flat, the lens is plano-convex or plano-concave depending on the curvature of the other surface. A lens with one convex and one concave side is convex-concave or meniscus. It is this type of lens that is most commonly used in corrective lenses.
If the lens is biconvex or plano-convex, a collimated beam of light passing through the lens will be converged (or focused) to a spot behind the lens. In this case, the lens is called a positive orconverging lens. The distance from the lens to the spot is the focal length of the lens, which is commonly abbreviated f in diagrams and equations.
BK7 BiConvex lens
Specifications |
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|---|---|
| Material: | BK7 |
| Diameter: | 25.4 mm |
| Focal Length: | 100 mm |
| Edge Thickness, Te: | 3.0 mm |
| Lens Type: | Bi-Convex |
Applications
Laser
Telescope
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Ships from:
China
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On FindLight:
since 2015
Frequently Asked Questions
A biconvex lens is a lens with two convex surfaces.
A biconvex lens has two convex surfaces, while a plano-convex lens has one flat surface and one convex surface.
The focal length of a biconvex lens is the distance from the lens to the spot where a collimated beam of light passing through the lens is converged or focused.
Biconvex lenses are commonly used in laser instruments and telescopes.
The surface quality of a precision achromatic doublet lens is 40/20.