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TECHSPEC 900nm, 12.5 x 17.6mm, Dichroic Longpass Filter

Stock #69-885
Qty 1-5
Qty 6
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Dimensions (mm):
12.5 x 17.6
Dimensional Tolerance (mm):
Cut-On Wavelength (nm):
Reflection Wavelength (nm):
675 - 855
Thickness (mm):
Thickness Tolerance (mm):
Wavelength Range (nm):
675 - 1600
Wavelength Range (μm):
0.675 - 1.6
Angle of Incidence (°):
Hard Coated
Fused Silica
Reflection (%):
>97, Average Polarization
>95, Absolute Polarization
Surface Quality:
Transmission (%):
>85, Average Polarization
>80, Absolute Polarization
Longpass Filter
Transmission Wavelength (nm):
935 - 1600
Transmitted Wavefront Tolerance:
Cut-On Tolerance (%):
Slope Factor (%):

Regulatory Compliance

Reach 197:

Product Family Description

  • Ideal for Fluorescence or Multispectral Imaging
  • Sharp Cut-On Wavelength
  • Broad Transmission and Reflection Ranges

Our TECHSPEC® Dichroic Longpass Filters are designed for a 45° angle of incidence. The rejected light is reflected at 90°, making these filters ideal for use in fluorescence applications or as spectral beamsplitters. These hard coated filters feature low polarization dependence, broad spectral ranges, and a precision fused silica substrate. Reflection and transmission curves are available to easily integrate TECHSPEC® Dichroic Longpass Filters into any application.

Hard coatings are used to increase durability while maintaining performance. The hard coating provides Dichroic Longpass Filters with high resistance to humidity, temperature, and abrasion, while also reducing the risk of damage when being handled.

Technical Information

Filter Type Transmitted Wavefront (RMS) Surface Quality Surface Flatness
R(avg) T(avg)
HP Dichroic λ/10 40-20 λ/2 >98% >90%
Fluorescence Dichroics 60-40 - >98% >90%
Dichroic Longpass λ/4 40-20 - >97% >85%

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