Biconcave Lens Synthetic Fused Silica 30mm Diameter −89.7mm Focal Length

SLSQ-30B-90N

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.
◦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
Name Biconcave Lens Synthetic Fused Silica 30mm Diameter −89.7mm Focal Length
Weight 0.0500kgs
Standard Coatings Available Yes
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.
Remark -
Attention
  • When a concave lens is used in combination with a convex lens it will be able to converge the light and can projected a suitable image.
  • The biconvex spherical lens has chromatic aberration, and the focal length will vary depending on the wavelength. Please check the “wavelength characteristic of the focal length data” on “Technical 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 Team for anti-reflection coatings suitable for your application.
  • The outer edge of the concave side is chamfered and the result is possibility that the lens may have a smaller edge thickness for this design.
Diameter φD 30mm
Focal length −89.7mm
Material Synthetic fused silica
Design Wavelength 546.1nm
Refractive index n<sub>e</sub> 1.46
Coating Uncoated
Clear aperture 90% of the diameter
Surface Quality (Scratch-Dig) 20-10
Diameter φD φ30mm
Focal length f −89.7mm
Edge thickness te 4.7mm
Center thickness tc 2mm
Back focal length fb −90.3mm
Radius of curvature r 82.8mm
Centration <1′
In stock
SKU
SLSQ-30B-90N
$154.00

Delivery in : in stock

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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