Name: 1.65μm, 50mm Diameter, Infrared Longpass Filter
SKU: 68-658
Price: C$639.80

1.65μm, 50mm Diameter, Infrared Longpass Filter

Infrared (IR) Longpass Filters

Stock #68-658 In Stock

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C$639.80

Qty 1-9
C$639.80

Qty 10+
C$575.82

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Diameter (mm):

50.00 +0.0/-0.1

Optical Density OD (Average):

≥3.0

Cut-On Wavelength (nm):

1,650.00

Silicon (Si)

Operating Temperature (°C):

-62 to +71

Coating:

Traditional Coated

Surface Quality:

80-50

Thickness (mm):

1.00

Thickness Tolerance (mm):

±0.2

Transmission (%):

>85

Transmission Wavelength (nm):

1730 - 3300

Transmission Wavelength (μm):

1.73 - 3.30

Type:

Longpass Filter

Blocking Wavelength Range (nm):

200 - 1650

Parallelism (arcmin):

<10

Clear Aperture (%):

Slope Factor (%):

Cut-On Wavelength (μm):

1.65 ±0.07

Note:

Transmission at cut-on wavelength is 5% of peak transmission.

Surface Flatness (P-V):

3 - 5λ

Regulatory Compliance

RoHS 2015:

Compliant

Certificate of Conformance:

View

Reach 235:

Compliant

Product Family Description

Coated on Silicon or Germanium Substrates
Ideal for Isolating Broad Spectral Regions
Durable, First-Surface Coatings

Longpass filters provide a sharp cut-off below a particular wavelength. Often used for order sorting, they isolate broad regions of the spectrum, simultaneously providing high transmission of desired energy, and deep rejection of unwanted energy. Constructed of hard, durable first-surface dielectric coatings on optical-quality IR-transmitting substrates, these Infrared (IR) Longpass Filters will withstand normal cleaning and handling associated with any high-quality optical component. These filters are particularly useful for FTIR spectroscopy and Thermal Imaging Applications. For custom sizes and coating requirements, please contact our Sales Department.