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69-681 25mm Dia. x 250mm FL; Uncoated; Si Plano-Convex Lens

69-681 25mm Dia. x 250mm FL; Uncoated; Si Plano-Convex Lens

Type
Lens
Subtype
Spherical Lens (Plano-Convex)
Brand
Edmund Optics
Product webpage
Edmund Optics products in the 3DOptix catalog

Properties

Shape
Circular
Diameter
25 mm
EFL
250 mm
BFL
249.12 mm
R1
604.4 mm

Material

Name
Silicon
Dispersion Equation
Sellmeier
n (λ)
3.4176022196178844
λ
10600 nm
B1
10.6684293
C1
0.090912191 μm2
B2
0.003043475
C2
1.287660172 μm2
B3
1.54133408
C3
1218816 μm2

69-681 25mm Dia. x 250mm FL; Uncoated; Si Plano-Convex Lens

The 69-681 is a 25mm diameter, 250mm focal length plano-convex lens, sourced from Edmund Optics. This lens is made of silicon, specifically silicon sal vil 1957, and does not have any coating.

The lens's geometry is characterized by a 2.87mm thickness at the edge, increasing slightly to 3mm at the center. The effective focal length (EFL) is 250mm, and the radius of curvature (R1) is 604.4mm. The back focal length (BFL) is 249.12mm, and both the inner and outer radii are 0mm, indicating a planar surface on the opposite side of the convex surface.

This lens is designed for use with a wavelength of 10600nm. Its spherical shape and silicon material make it suitable for a wide range of optical applications. However, please note that this lens is uncoated, which may affect its performance in certain environments or when used with specific light sources. Always ensure to consider the lens's properties and your specific application requirements before making a purchase.

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