BK7 Plano-Concave 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 Plano-Concave lens
Specifications |
|
|---|---|
| Material: | BK7 |
| Diameter: | 25.4 mm |
| Focal Length: | 100 mm |
| Edge Thickness, Te: | 4.0 mm |
| Lens Type: | Plano-Concave |
Applications
Laser
Telescope
Safty
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How to order?
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Ships from:
China
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Sold by:
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On FindLight:
since 2015
Frequently Asked Questions
A BK7 Plano-Concave lens is a type of lens with one flat surface and one concave surface made of BK7 glass.
The specifications of the Singlet Lenses include material (H-K9L or Fused Silica), surface quality, surface accuracy, focal length tolerance, centration, clear aperture, and product code.
The product code for Plano-Convex Lenses is LPX.
Achromatic Doublet Lenses are lenses made of optical crown and flint glasses or equivalent that are designed to minimize chromatic aberration.
The product code for Plano-Concave Cylindrical Lenses is LCV.