Edmund Optics uses cookies to optimize and enhance the features and content on our website. By continuing to use this website, you consent to our use of cookies.

Products Capabilities Resources Company Contact Us

- We have set your country to Australia
  
  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.
  
  Select Your Country/Region
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

See all 5 Products in Family

25.4mm Diameter x 50.8mm FL, CaF₂ Double-Convex Lens

Calcium Fluoride Double-Convex (DCX) Lenses

Stock #47-057

A$412.50

Qty 1
A$412.50

Volume Pricing
Request a Quote

Code V eDrawings: eprt IGES PDF Drawings STEP: stp Zemax: zmx

+ Add to Saved List Compare

Diameter (mm):

25.40 +0.00/-0.13

Effective Focal Length EFL (mm):

50.80

Coating:

Uncoated

Substrate:

Calcium Fluoride (CaF₂)

Surface Quality:

60-40

Clear Aperture (%):

90.00

Centering (arcmin):

Bevel:

Protective bevel as needed

Center Thickness CT (mm):

6.20

Center Thickness Tolerance (mm):

±0.2

Edge Thickness ET (mm):

2.00

Radius R₁=-R₂ (mm):

39.61

Back Focal Length BFL (mm) @ DWL:

48.51

Effective Focal Length EFL @ 0.6328μm (mm):

46.86

Effective Focal Length EFL @ 1.064μm (mm):

47.33

Effective Focal Length EFL @ 2.94μm (mm):

48.47

Effective Focal Length EFL @ 5.0μm (mm):

50.80

f/#:

2.00

Focal Length Specification Wavelength (μm):

5.00

Focal Length Tolerance (%):

±2 @ DWL

Numerical Aperture NA:

0.25

Surface Accuracy:

1λ

Type:

Double-Convex Lens

Wavelength Range (μm):

0.35 - 7

Wavelength Range (nm):

350 - 7000

Regulatory Compliance

Reach 197:

Compliant

RoHS 2015:

Compliant

Product Family Description

Greater than 90% Transmission from 350nm-7μm
Low Index of Refraction

Calcium Fluoride is often used in spectroscopic windows and lenses due to its high transmission from 350nm to 7μm. Calcium Fluoride is also commonly found in cryogenically cooled thermal imaging systems. Its low absorption and high damage threshold makes it a popular choice for excimer laser optics. Calcium Fluoride's low refractive index allows it to be used without an antireflective coating. The Knoop hardness of Calcium Fluoride is 158.3.