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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$400.00

Qty 1
A$400.00

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

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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

RoHS 2015:

Compliant

Reach 205:

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.