Diameter (mm):

25.40 +0.00/-0.13

Effective Focal Length EFL (mm):

63.50

Coating:

Uncoated

Calcium Fluoride (CaF₂)

Surface Quality:

60-40

Clear Aperture (%):

90.00

Centering (arcmin):

Bevel:

Protective bevel as needed

Center Thickness CT (mm):

5.30

Center Thickness Tolerance (mm):

±0.2

Edge Thickness ET (mm):

2.00

Radius R₁=-R₂ (mm):

49.89

Back Focal Length BFL (mm) @ DWL:

61.56

Effective Focal Length EFL @ 0.6328μm (mm):

58.57

Effective Focal Length EFL @ 1.064μm (mm):

59.16

Effective Focal Length EFL @ 2.94μm (mm):

60.59

Effective Focal Length EFL @ 5.0μm (mm):

63.50

f/#:

2.5

Focal Length Specification Wavelength (μm):

5.00

Focal Length Tolerance (%):

±2 @ DWL

Numerical Aperture NA:

0.20

Surface Accuracy:

1λ

Type:

Double-Convex Lens

Wavelength Range (μm):

0.35 - 7

Wavelength Range (nm):

350 - 7000

Regulatory Compliance

RoHS 2015:

Compliant

Reach 209:

Compliant

Certificate of Conformance:

View

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.

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25.0/25.4mm Optic Dia., SM1 Thin Mount, M4	Fixed	#13-787	$19.00 Qty 5+ $18.10 Request Quote	In Stock ×
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25.4mm Optic Dia., 10mm Max Optic Thickness, Optic Mount	Fixed	#64-561	$29.00 Qty 10+ $26.10 Request Quote	In Stock ×
25.4mm Optic Dia., 13mm Max Optic Thickness, Optic Mount	Fixed	#64-562	$29.00 Qty 10+ $26.10 Request Quote	In Stock ×
25mm Thick Inner Single Optic Mount	Fixed	#38-758	$31.00 Qty 5+ $29.30 Request Quote	In Stock ×
25.4mm Inner Single Optic Mount	Fixed	#38-756	$31.00 Qty 5+ $29.30 Request Quote	In Stock ×
25.0/25.4mm Optic Dia., L-Slot Direct Mount	Fixed	#36-410	$63.00 Request Quote	In Stock ×
25.0/25.4mm Optic Dia., Side Flange Direct Mount	Fixed	#36-414	$63.00 Request Quote	In Stock ×
25/25.4mm Diameter, C-Mount Thin Optic Mount	Fixed	#56-353	$89.10 Qty 5+ $79.00 Request Quote	In Stock ×
25.0/25.4mm Optic Dia., L-Slot and Rotation Direct Mount	Adjustable - Rotary	#36-411	$91.00 Request Quote	In Stock ×
25.0/25.4mm Optic Dia., X-Y Translating Optic Mount	Adjustable - Linear (XY)	#62-956	$253.00 Qty 5+ $240.40 Request Quote	In Stock ×
25.0/25.4mm Optic Dia., X-Y-Z Translating Optic Mount	Adjustable - Linear (XYZ)	#62-959	$496.00 Qty 5+ $446.40 Request Quote	In Stock ×
25.0/25.4mm Optic Dia., 5 Axes Optical Mount	Adjustable - Linear (XYZ) & Tip-Tilt	#13-776	$691.00 Qty 5+ $656.60 Request Quote	In Stock ×

25.4mm Diameter x 63.5mm FL, CaF2 Double-Convex Lens

Regulatory Compliance

Product Family Description

25.4mm Diameter x 63.5mm FL, CaF₂ Double-Convex Lens