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3.75μm CWL, 18mm FL ZnSe Focusing Objective

Stock #84-937 Clearance
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€390.00
Qty 1
€390.00
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Numerical Aperture NA:
0.08
Center Wavelength CWL (µm):
3.75
Center Wavelength CWL (nm):
3750.00
Clear Aperture CA (mm):
5.00
Coating Specification:
3.75μm AR: T >99% from 3.25 - 4.25μm
Focal Length FL (mm):
18.0
Working Distance (mm):
17.5

Regulatory Compliance

RoHS:

Product Family Description

  • Maximum Coupling Efficiency of Beams up to 5mm
  • Easy Alignment with HeNe Lasers
  • Performance from 2 - 12μm

Zinc Selenide Infrared (IR) Focusing Objectives are designed to provide maximum coupling efficiency between the output from an IR source and a single-mode or multi-mode transmitting fiber optic. The aspheric design provides a focal spot smaller than the fiber core diameter, allowing for precision alignment without negatively impacting transmission between the objective and fiber. Zinc Selenide Infrared (IR) Focusing Objectives are available with multiple anti-reflection (AR) coating options between 3.25 – 9.5μm, and are ideal for a range of fiber coupling and IR focusing applications.

Laser Optics

Technical Information

Focal Spot Size (μm)
Beam Diameter (mm) 3.75(μm) CWL 4.75(μm) CWL 8.50(μm) CWL
6mm FL 12mm FL 18mm FL 6mm FL 12mm FL 18mm FL 6mm FL 12mm FL 18mm FL
2.0 15 30 46 23 46 69 30 61 91
2.5 12 24 37 18 37 55 24 49 73
3.0 14 20 30 15 30 46 20 41 61
4.0 32 15 23 32 23 34 32 30 46
5.0 63 16 18 63 18 27 63 24 37

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