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All Products / Optics / Optical Filters / Longpass Filters / High Performance OD 4.0 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

375nm 50mm Dia., High Performance Longpass Filter

High Performance OD 4.0 Longpass Filters

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Stock #34-303 3-5 days
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A$881.60
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A$881.60
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A$755.20
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Specifications

General

Type:
Longpass Filter

Physical & Mechanical Properties

Diameter (mm):
50.00 +0/-0.2
Thickness (mm):
1.50
Thickness Tolerance (mm):
±0.1
Clear Aperture (%):
>80
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

Optical Properties

Angle of Incidence (°):
0
Optical Density OD (Average):
≥4.0
Cut-On Wavelength (nm):
375.00
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Fused Silica (Corning 7980)
Coating:
Hard Coated
Rejection Wavelength (nm):
200 - 365
Surface Quality:
60-40
Transmission (%):
>91
Transmission Wavelength (nm):
383 - 1600
Transmitted Wavefront, RMS:
≤λ/4 @ 633nm (prior to coating)
Cut-On Tolerance (%):
±1
Slope Factor (%):
1.00
Coating Specification:
Surface 1: Hard Dielectric Sputtered
Surface 2: AR Coated
Wavelength Range (nm):
200 - 1600

Environmental & Durability Factors

Environmental Durability:
Humidity per MIL-STD-810H, Section 507.6
Temperature per MIL-STD-810H, Section 501.7 and 502.7

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 Details

TECHSPEC® High Performance OD 4.0 Longpass Filters feature high transmission in the pass band combined with superior blocking in the rejection band. Due to a rejection band optical density of 4.0 combined with >91% in the pass band, these filters are ideal for a wide variety of applications. TECHSPEC® High Performance OD 4.0 Longpass Filters are hard coated, with a hard dielectric sputtered as the first surface and AR coating as the second. Eliminate stray light by creating custom bandpass filters when combined with TECHSPEC® High Performance Shortpass Filters.

Note: These filters are optimized for high spectral performance rather than high Laser Induced Damage Thresholds (LIDT). A typical LIDT for these filters is 1 J/cm2 @ 532nm, 10ns. Please contact us if you require a filter with a higher LIDT value.

 TECHSPEC® Rotating Filter Wheel can be used for applications requiring a variety of filters.

Technical Information

Custom

Edmund Optics offers comprehensive custom manufacturing services for optical and imaging components tailored to your specific application requirements. Whether in the prototyping phase or preparing for full-scale production, we provide flexible solutions to meet your needs. Our experienced engineers are here to assist—from concept to completion.

Our capabilities include:

  • Custom dimensions, materials, coatings, and more
  • High-precision surface quality and flatness
  • Tight tolerances and complex geometries
  • Scalable production—from prototype to volume

Learn more about our custom manufacturing capabilities or submit an inquiry here.

Compatible Mounts