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SLSI
Focal length f
Back focal length fb
Center thickness tc
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The single crystal of silicon used in semiconductor has low absorption in the infrared wavelength of 1.2 - 6μm and it can be used as an optical element for infrared light. It is a spherical plano convex lens that was made with the silicon single crystal. It is used as a lens for receiving infrared light and in infrared sensors.

◦Even though it looks like the light does not transmit because of its metallic luster, it is transmitting through a wide infrared range of 1.2 - 6μm.
◦The wavelength of 1.2μm or less does not transmit, so it also provides the effect of an infrared transmission filter.
◦Since the silicon lens has a refractive index of 3 or more, the lens curvature is slower then when made from standard glass.

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Guide

▶It is available with an AR coating to reduce the transmission loss by reflection at the requested wavelength.

Attention

▶Silicon lens has metallic luster so that visible light is reflected and absorbed. Because of this, no transmittance occurs.
▶Silicon lens without an anti-reflection coating has a loss due to surface reflection and results in transmittance of about 50%.

Common Specifications
MaterialSillcon (Si)
TypeOthers
Design Wavelength5μm
CoatingUncoated
Surface reflectance30% (per one surface)
Shape TypePlano Convex spheric (Polished surface on both sides)
Centration<3′
Clear aperture90% of the diameter
Surface Quality (Scratch-Dig)60-40
Outline Drawing

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Schematic

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Physics

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Typical Transmittance Data

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T: Transmission

Part Number

Catalog PDF

dxf

STP

IGS

SAT

Zemax

SLSI-25-25P

SLSI-25-50P

SLSI-25-100P

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    JP Yen Stock Qty
SLSI-25-25P
SLSI-25-50P
SLSI-25-100P

25mm

23mm

2mm

3.3mm

50mm

48mm

2mm

2.6mm

100mm

98mm

2mm

2.3mm

RoHS  

¥18,000

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RoHS  

¥18,000

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RoHS  

¥18,000

CONTACT
US