K9 Bi-Concave Lens front product view on a dark background
Angled view of K9 Bi-Concave Lens for laser focusing, imaging and beam-shaping systems

SO-L24 SERIES

K9 Bi-Concave Lens

SO-L24 K9 bi-concave lenses form an economical negative-power series for beam expansion, focal-length extension and optical training systems. The symmetric concave geometry is useful in finite-conjugate layouts and compound lens groups where divergence is required without a planar surface.

K9 Optical Glass
$26.47
$26.47

Select a Model

Product Overview

Configure K9 Bi-Concave Lens around focal geometry and coating

Source specifications are provided through the dimensional model data: diameter, negative focal length, center thickness, edge thickness, radius and back focal length. The material is identified as K9 optical glass for this product family.

Select by the required negative focal length and beam diameter, then reserve sufficient radial and axial clearance for the thicker lens edge.

Select a Model

models

Engineering Guidance

Choose the configuration around focal length and working wavelength

Optical behavior

Source specifications are provided through the dimensional model data: diameter, negative focal length, center thickness, edge thickness, radius and back focal length. The material is identified as K9 optical glass for this product family.

Selection and integration

Select by the required negative focal length and beam diameter, then reserve sufficient radial and axial clearance for the thicker lens edge.

Need a different diameter, tolerance or coating?

Custom substrate materials, dimensions, angular tolerances and coating bands can be reviewed for prototype and production quantities.

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Technical Resources

Related engineering articles

Selection notes and practical guidance matched to this product family.

CANAL GLASS SHOP
TECHNICAL RESOURCE
Optical Fundamentals · 7 min

Understanding Focal Length, BFL and Lens Orientation

Relate effective focal length, back focal length and lens orientation to focusing and collimation performance.
CANAL GLASS SHOP
TECHNICAL RESOURCE
Material Selection · 6 min

K9 Glass, Fused Silica and Optical Material Tradeoffs

Compare transmission, thermal behavior and cost before choosing a substrate for a precision lens.
CANAL GLASS SHOP
TECHNICAL RESOURCE
Selection Guide · 8 min

Reading Radius, Center Thickness and Surface Quality

Use geometric and surface specifications to confirm optical fit, mounting depth and expected image quality.