CHAT EMAIL

Country/Region
- We have set your country/region to India
  
  You can change this selection at any time, but products in your cart, saved lists, or quote may be removed if they are unavailable in the new shipping country/region.
  
  Select Your Country/Region
Hello, My Account
- Log In
  
  New to EO? Register.
  
  Welcome !
  
  My Account
  Access Dashboard
  
  My Profile
  Update My Profile
  
  Payment & Shipping
  Address Book, Tax Certificates
  
  Web Orders
  View Past Orders
  
  Saved Lists
  Saved Items for Later
  
  Log Out

Product added to cart

See all 40 Products in Family

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

25mm Dia x 20mm FL 3-12μm Coated, Ge Aspheric Lens

Name: 25mm Dia x 20mm FL 3-12μm Coated, Ge Aspheric Lens
Brand: TECHSPEC
SKU: 89-609
Price: ₹60,350.00

Stock #89-609

₹60,350.00 Other Coating Options

Qty 1-5
₹60,350.00

Qty 6+
₹47,260.00

Volume Pricing
Request Quote

- +

Compare

Diameter (mm):

25.00 +0.0/-0.1

Effective Focal Length EFL (mm):

20.00 @ 4000nm

Numerical Aperture NA:

0.63

Back Focal Length BFL (mm):

19.08

Center Thickness CT (mm):

3.70 ±0.10

Coating:

BBAR (3000-12000nm)

Coating Specification:

R_avg <5.0% @ 3 - 12μm

Germanium (Ge)

Clear Aperture CA (mm):

22.5

Surface Quality:

60-40

Edge Thickness ET (mm):

2.5

Centering (arcmin):

≤5

Bevel:

Protective bevel as needed

f/#:

0.79

Edges:

Diamond Turned

Shape of Back Surface:

Plano

Wavelength Range (nm):

3000 - 12000

Conjugate Distance:

Infinite

Focal Length Specification Wavelength (nm):

4000

Asphere Figure Error, RMS @ 632.8nm:

λ/6

Regulatory Compliance

RoHS 2015:

Compliant

Reach 223:

Compliant

Product Family Description

Diffraction Limited Performance
Variety of Coating Options
Full Prescription Data Available

Our TECHSPEC® Germanium Infrared (IR) Aspheric Lenses provide diffraction limited focusing performance over a broad spectral range in the Mid- and Long Wave infrared regions. Ideal for monochromatic light sources, such as quantum cascade lasers, these lenses offer a high performance alternative to standard plano-convex lenses.

Each aspheric lens is available uncoated, or with BBAR coating options. Uncoated germanium has transmission of <50%, so custom anti-reflection (AR) coatings should be considered if specifying an uncoated lens. Each BBAR coated lens offers >95% transmission, making it ideal for integration into a variety of OEM applications. For custom design or coating options, please contact our Sales Department.

Title	Type	Stock Number	Price	Buy
25.0/25.4mm Optic Dia., SM1 Thin Mount, M4	Fixed	#13-787	₹1,445.00 Qty 5+ ₹1,373.00 Request Quote	10 to 12 days ×
25.0/25.4mm Optic Dia., SM1 Thin Mount, 8-32	Fixed	#13-788	₹1,445.00 Qty 5+ ₹1,373.00 Request Quote	10 to 12 days ×
25mm Thin Inner Single Optic Mount	Fixed	#38-755	₹2,508.00 Qty 5+ ₹2,406.00 Request Quote	10 to 12 days ×
25.0mm Optic Dia., Optic Mount	Fixed	#64-560	₹3,485.00 Qty 10+ ₹3,137.00 Request Quote	7 days ×
25.0/25.4mm Optic Dia., L-Slot Direct Mount	Fixed	#36-410	₹4,930.00 Request Quote	10 to 12 days ×
25.0/25.4mm Optic Dia., Side Flange Direct Mount	Fixed	#36-414	₹4,930.00 Request Quote	10 to 12 days ×
25/25.4mm Diameter, T-Mount Thin Optic Mount	Fixed	#52-292	₹4,930.00 Qty 5+ ₹4,378.00 Request Quote	10 to 12 days ×
25mm Thin Inner Pair Optic Mounts	Fixed	#11-052	₹5,015.00 Qty 5+ ₹4,684.00 Request Quote	10 to 12 days ×
25mm Thick Inner Pair Optic Mounts	Fixed	#11-054	₹5,015.00 Qty 5+ ₹4,684.00 Request Quote	10 to 12 days ×
25.0/25.4mm Optic Dia., L-Slot and Rotation Direct Mount	Adjustable - Rotary	#36-411	₹7,183.00 Request Quote	10 to 12 days ×
25/25.4mm Diameter, C-Mount Thin Optic Mount	Fixed	#56-353	₹7,353.00 Qty 5+ ₹6,511.00 Request Quote	Contact Us ×
25.0/25.4mm Optic Dia., X-Y Translating Optic Mount	Adjustable - Linear (XY)	#62-956	₹20,145.00 Qty 1+ ₹20,145.00 Request Quote	10 to 12 days ×
25.0/25.4mm Optic Dia., X-Y-Z Translating Optic Mount	Adjustable - Linear (XYZ)	#62-959	₹39,525.00 Qty 5+ ₹35,573.00 Request Quote	10 to 12 days ×
25.0/25.4mm Optic Dia., 5 Axes Optical Mount	Adjustable - Linear (XYZ) & Tip-Tilt	#13-776	₹54,995.00 Qty 5+ ₹52,250.00 Request Quote	10 to 12 days ×

Sales & Expert Advice

or view regional numbers

Easy-to-Use
QUOTE TOOL
enter stock numbers to begin