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All Products / Optics / Optical Filters / Longpass Filters / Dichroic Longpass Filters
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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

500nm, 25mm Diameter, Dichroic Longpass Filter

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Stock #69-888 3-4 days
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£141.10
Qty 1-5
£141.10
Qty 6+
£113.05
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Diameter (mm):
25.00
Angle of Incidence (°):
45
Cut-On Wavelength (nm):
500.00
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Fused Silica (Corning 7980)
Coating:
Hard Coated
Reflection (%):
>97, Average Polarization
>95, Absolute Polarization
Reflection Wavelength (nm):
350 - 480
Surface Quality:
60-40
Thickness (mm):
1.05
Thickness Tolerance (mm):
±0.1
Transmission (%):
>85, Average Polarization
>80, Absolute Polarization
Transmission Wavelength (nm):
520 - 1600
Type:
Dichroic Filter
Dimensional Tolerance (mm):
+0.0/-0.2
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
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
Wavelength Range (nm):
350 - 1600
Wavelength Range (μm):
0.35 - 1.6

Regulatory Compliance

RoHS 2015:
Compliant
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Certificate of Conformance:
View
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REACH 241:
Compliant
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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 1λ 60-40 - >98% >90%
Dichroic Longpass λ/4 40-20 - >97% >85%