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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

850nm, 12.5 x 17.6mm, Dichroic Longpass Filter

Stock #69-884
£87.13
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Qty 1-5
£87.13
Qty 6
£69.70
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Dimensions (mm):
12.5 x 17.6
Dimensional Tolerance (mm):
+0.00/-0.20
Cut-On Wavelength (nm):
850.00
Thickness (mm):
1.05
Thickness Tolerance (mm):
±0.1
Reflection Wavelength (nm):
635 - 805
Transmission Wavelength (nm):
880 - 1600
Wavelength Range (nm):
635 - 1600
Wavelength Range (μm):
0.635 - 1.6
Angle of Incidence (°):
45
Coating:
Hard Coated
Substrate:
Reflection (%):
>97, Average Polarization
>95, Absolute Polarization
Surface Quality:
60-40
Transmission (%):
>85, Average Polarization
>80, Absolute Polarization
Type:
Dichroic Filter
Transmitted Wavefront Tolerance:
λ/4
Cut-On Tolerance (%):
±2
Slope Factor (%):
3.00

Regulatory Compliance

RoHS 2015:
Reach 209:

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
(P-V)
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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