Plano Concave Lens (Synthetic Fused Silica) / SLSQ-50B-80N

These biconcave lenses are used when a very high negative power is required. They can be used in a multi-element system or alone to produce a diverging cone or virtual image. Sharpe edges, which are common in negative lenses, are removed by beveling to reduce the likelihood of chipping.

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Part Number
SLSQ-50B-80N
¥28,700
◦There are two types of biconvex lenses available; synthetic fused silica for wavelengths less than 350nm ultraviolet light.
◦Consult our Sales Division for anti-reflection coatings suitable for your application.
◦Our lenses are listed by outside diameter and focal length to assist your selection according to required specifications.
More Information
Catalog Code W3061
RoHS Yes
CE No
Download Product's Datasheet
CAD data
Guide ▶Lenses are available in a large selection and in custom sizes and focal lengths.
▶In addition to our standard coating we offer custom anti-reflective coating at specific wavelengths.
▶Please refer to here for wavelength_characteristic Data (Reference Data, EXCEL file format).
Attention

▶Biconcave lenses are negative lenses that diverge collimated incident light and are primarily used in conjunction with convex lenses to shape beams.
▶The biconcave lens has chromatic aberration, and the focal length will vary depending on the wavelength. Please check the wavelength characteristic of the focal length data for the focal lengths of each wavelength.
▶Transmissions losses due to reflection off the front and rear surfaces of the lens can be minimized by coating the surfaces. Consult our Sales Division for anti-reflection coatings suitable for your application.
▶ Sharpe edges are common in negative lenses are removed by beveling in order to reduce chipping may result in smaller then edge thickness. Thicknesses listed in tables are to theoretical sharp edge.

Specifications
MaterialSynthetic fused silica
Design wavelength546.1nm
Refractive indexne=1.460
CoatingUncoated
Clear aperture90% of the diameter
Surface Quality (Scratch-Dig)20−10
Diameter φDφ50mm
Focal length f-79.5mm
Edge thickness te11.8mm
Center thickness tc3mm
Back focal length fb-80.5mm
Radius of curvature r73.6mm
Centration<1′