More Views

Filter, IR Long Pass 2.40μm, 25.0mm dia., Germanium

Sku: 642-0090

Quick Overview

A Longpass filter designed for use with Sciencetech systems in the Infrared range.
Diameter (mm) 25.0
Diameter Tolerance (mm) +0.0 / -0.1
Thickness (mm) 1.0
Thickness Tolerance (mm) ±0.2
Clear Aperture (%) 90
Surface Accuracy (λ) 3 - 5
Surface Quality 60-40
Parallelism (arcminutes) <10
Transmission (%) >90
Transmission Wavelength (μm) 2.52 - 4.80
Optical Density OD >3.0
Cut-On Wavelength (μm) 2.40
Cut-On Wavelength Tolerance (μm) 0.09
Cut-On Tolerance (%) 5 of Peak Transmission
Slope Factor (%) <6
Substrate Germanium
Operating Temperature (°C) -62 to +71
RoHS Compliant

Please speak with your authorized Sciencetech technical sales staff for a full list of specifications.

Availability: In stock


Additional Information

Name Filter, IR Long Pass 2.40μm, 25.0mm dia., Germanium
SKU 642-0090
Thickness (mm) 1.0
Spectral Range (nm) 300 - 15000
Reflected / Absorbed Band 300-2400 nm
Transmission band (nm) 2400 - 15000 nm
Dimensions 25 mm
Filter Type Long Pass
Solar Filters Other
Spectral Range Infrared
Filter Style Interference


SCIENCETECH has built a reputation on custom solutions.  Whether you need a small modification to an existing system or a completely novel design built from the ground up to meet your technical specifications, Sciencetech's engineering and optical design teams are ready to help.


Contact us for more info or request a quote