eo_logo
 
Product added to cart
TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

25mm Dia x 12.5mm FL 3-5μm Coated, Hybrid Ge Aspheric Lens

×
Stock #68-259 3-4 days
×
Quantity Selector - Use the plus and minus buttons to adjust the quantity. +
€1.725,00
Qty 1-5
€1.725,00
Qty 6+
€1.380,00
Volume Pricing
Request Quote
Prices shown are exclusive of VAT/local taxes
Product Downloads

Specifications

General

Type:
Aspheric Lens

Physical & Mechanical Properties

Diameter (mm):
25.00 +0.0/-0.1
Centering (arcmin):
≤5
Clear Aperture CA (mm):
24.0
Edge Thickness ET (mm):
1.22
Center Thickness CT (mm):
4.22 ±0.10
Bevel:
Protective bevel as needed
Edges:
Diamond Turned
Shape of Back Surface:
Convex

Optical Properties

Effective Focal Length EFL (mm):
12.50 @ 4000nm
Numerical Aperture NA:
1.00
Back Focal Length BFL (mm):
11.56
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Germanium (Ge)
Aspheric Design Wavelength (nm):
4000
Asphere Figure Error, RMS @ 632.8nm:
λ/6
Coating:
BBAR (3000-5000nm)
Coating Specification:
Ravg <3.0% @ 3 - 5μm
Surface Accuracy, P-V (μm):
0.3
Surface Quality:
60-40
f/#:
0.5
Radius R2 (mm):
440.2
Wavelength Range (nm):
3000 - 5000
Conjugate Distance:
Infinite

Regulatory Compliance

RoHS 2015:
Certificate of Conformance:
Reach 235:

Product Details

  • Color Corrected for 3 – 5μm
  • Near Diffraction Limited Focusing Performance
  • Full Prescription Data Available
  • Due to material supply chain disruptions with germanium, there may be increased lead times and price changes on our germanium products. For more information, please contact our customer service team.
  • Edmund Optics has limited remaining inventory of this part number and no raw material available to supply more once this is depleted.  Please contact our Product Support Engineers to help with an alternate solution for your needs. Customer Service can provide you the latest price and availability.

Our TECHSPEC® Germanium Infrared (IR) Hybrid Aspheric Lenses provide diffraction limited focusing performance at any wavelength in the 3 – 5μm region, and near diffraction limited performance when used over the entire 3 -5μm spectral range. They are ideal for integration into imaging applications, FTIR spectrometers, or any Mid-Wave IR application utilizing a broad band light source.

Each hybrid aspheric lens is coated for >95% transmission for the most efficient use of costly infrared illumination. However, transmission is limited by the inherent diffraction efficiency of the aspheric surface, yielding lower overall transmission at the extremes of the design spectral band. For custom design or coating options, please contact our Sales Department.

Technical Information

Frequently Purchased Together

Compatible Mounts

Title  Type Compare Stock Number   Price  Buy
25.0mm Optic Dia., Optic Mount Fixed #64-560 €30,50
Request Quote
  • 3-4 days
    ×
25.0/25.4mm Optic Dia., X-Y Translating Optic Mount Adjustable - Linear (XY) #62-956 €258,00
Request Quote
  • 3-4 days
    ×
25.0/25.4mm Optic Dia., X-Y-Z Translating Optic Mount Adjustable - Linear (XYZ) #62-959 €505,00
Request Quote
  • 3-4 days
    ×
25.0/25.4mm Optic Dia., 5 Axes Optical Mount Adjustable - Linear (XYZ) & Tip-Tilt #13-776 €705,00
Request Quote
  • 3-4 days
    ×