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

Dichroic Longpass Filters

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  • 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.

Note: The chevron on the edge of the filter points towards surface S1 with the primary filter coating on which the light should be incident.

Common Specifications

Thickness (mm):
1.05
Thickness Tolerance (mm):
±0.1
Dimensional Tolerance (mm):
+0.0/-0.2
Physical Durability:
Adhesion per MIL-PRF-13830B, Section C.4.5.12
Moderate abrasion per MIL-PRF-13830B, Section C.4.5.11
Cleaning per MIL-C-48497A Section 4.5.4.2
Angle of Incidence (°):
45
Substrate:
Fused Silica (Corning 7980)
Coating:
Hard Coated
Reflection (%):
>97, Average Polarization
>95, Absolute Polarization
Surface Quality:
60-40
Transmission (%):
>85, Average Polarization
>80, Absolute Polarization
Transmitted Wavefront Tolerance:
λ/4
Cut-On Tolerance (%):
±2
Slope Factor (%):
3.00
Environmental Durability:
Humidity per MIL-STD-810H, Section 507.6
Temperature per MIL-STD-810H, Section 501.7 and 502.7

Products

Product Details

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 1λ 60-40 - >98% >90%
Dichroic Longpass λ/4 40-20 - >97% >85%

Accessories

Title CompareStock Number  Price Buy
400 - 750nm, 25mm Dia., Dichroic Longpass Filter Kit (8 Filters) #15-102 A$2,032.00   Request Quote
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800 - 1200nm, 25mm Dia., Dichroic Longpass Filter Kit (9 Filters) #15-103 A$2,216.00   Request Quote
  • 3-5 days
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400 - 750nm, 25.2 x 35.6mm, Dichroic Longpass Filter Kit (8 Filters) #15-104 A$2,032.00   Request Quote
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800 - 1200nm, 25.2 x 35.6mm, Dichroic Longpass Filter Kit (9 Filters) #15-105 A$2,216.00   Request Quote
  • Contact Us
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