Calcium Fluoride Plano Convex Lenses

SLCFU

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SLCFU

Calcium fluoride (CaF₂) is a crystal which has excellent transmission characteristics in a wide wavelength range from ultraviolet (200nm) to near-infrared (8μm).

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Guide

It is available with an AR coating to reduce the transmission loss at the requested wavelength.
It is also available for products with different size and focal lengths that are not listed in on the website or in the catalog.

Name Diameter Focal length Delivery Price Add to cart

12.7mm Calcium Fluoride Plano Convex Lens, 20mm Focal Length
SLCFU-12.7-20N

12.7mm

20mm

1-3 weeks

Material	Optical CaF₂ Crystal
Design Wavelength	5μm
Coating	Uncoated
Surface reflectance	3% (per one surface)
Shape Type	Plano-convex spheric (Polished surface on both sides)
Centration	＜3′
Clear aperture	90% of the diameter
Surface Quality (Scratch-Dig)	40-20
Diameter	φ12.7mm
Focal length f	20mm
Back focal length fb	mm
Edge thickness te	mm
Center thickness tc	mm

25.4mm Calcium Fluoride Plano Convex Lens, 40mm Focal Length
SLCFU-25.4-40P

25.4mm

40mm

1-3 weeks

Material	Optical CaF₂ Crystal
Design Wavelength	5μm
Coating	Uncoated
Surface reflectance	3% (per one surface)
Shape Type	Plano-convex spheric (Polished surface on both sides)
Centration	＜3′
Clear aperture	90% of the diameter
Surface Quality (Scratch-Dig)	60-40
Diameter	φ25.4mm
Focal length f	40mm
Back focal length fb	mm
Edge thickness te	mm
Center thickness tc	mm

12.7mm Calcium Fluoride Plano Convex Lens, 50mm Focal Length
SLCFU-12.7-50N

12.7mm

50mm

1-3 weeks

Material	Optical CaF₂ Crystal
Design Wavelength	5μm
Coating	Uncoated
Surface reflectance	3% (per one surface)
Shape Type	Plano-convex spheric (Polished surface on both sides)
Centration	＜3′
Clear aperture	90% of the diameter
Surface Quality (Scratch-Dig)	40-20
Diameter	φ12.7mm
Focal length f	50mm
Back focal length fb	mm
Edge thickness te	mm
Center thickness tc	mm

25.4mm Calcium Fluoride Plano Convex Lens, 125mm Focal Length
SLCFU-25.4-125P

25.4mm

125mm

1-3 weeks

Material	Optical CaF₂ Crystal
Design Wavelength	5μm
Coating	Uncoated
Surface reflectance	3% (per one surface)
Shape Type	Plano-convex spheric (Polished surface on both sides)
Centration	＜3′
Clear aperture	90% of the diameter
Surface Quality (Scratch-Dig)	60-40
Diameter	φ25.4mm
Focal length f	125mm
Back focal length fb	mm
Edge thickness te	mm
Center thickness tc	mm

25.4mm Calcium Fluoride Plano Convex Lens, 50mm Focal Length
SLCFU-25.4-50P

25.4mm

50mm

1-3 weeks

Material	Optical CaF₂ Crystal
Design Wavelength	5μm
Coating	Uncoated
Surface reflectance	3% (per one surface)
Shape Type	Plano-convex spheric (Polished surface on both sides)
Centration	＜3′
Clear aperture	90% of the diameter
Surface Quality (Scratch-Dig)	60-40
Diameter	φ25.4mm
Focal length f	50mm
Back focal length fb	mm
Edge thickness te	mm
Center thickness tc	mm

12.7mm Calcium Fluoride Plano Convex Lens, 25mm Focal Length
SLCFU-12.7-25N

12.7mm

25mm

1-3 weeks

Material	Optical CaF₂ Crystal
Design Wavelength	5μm
Coating	Uncoated
Surface reflectance	3% (per one surface)
Shape Type	Plano-convex spheric (Polished surface on both sides)
Centration	＜3′
Clear aperture	90% of the diameter
Surface Quality (Scratch-Dig)	40-20
Diameter	φ12.7mm
Focal length f	25mm
Back focal length fb	mm
Edge thickness te	mm
Center thickness tc	mm

25.4mm Calcium Fluoride Plano Convex Lens, 75mm Focal Length
SLCFU-25.4-75P

25.4mm

75mm

1-3 weeks

Material	Optical CaF₂ Crystal
Design Wavelength	5μm
Coating	Uncoated
Surface reflectance	3% (per one surface)
Shape Type	Plano-convex spheric (Polished surface on both sides)
Centration	＜3′
Clear aperture	90% of the diameter
Surface Quality (Scratch-Dig)	60-40
Diameter	φ25.4mm
Focal length f	75mm
Back focal length fb	mm
Edge thickness te	mm
Center thickness tc	mm

25.4mm Calcium Fluoride Plano Convex Lens, 100mm Focal Length
SLCFU-25.4-100P

25.4mm

100mm

1-3 weeks

Material	Optical CaF₂ Crystal
Design Wavelength	5μm
Coating	Uncoated
Surface reflectance	3% (per one surface)
Shape Type	Plano-convex spheric (Polished surface on both sides)
Centration	＜3′
Clear aperture	90% of the diameter
Surface Quality (Scratch-Dig)	60-40
Diameter	φ25.4mm
Focal length f	100mm
Back focal length fb	mm
Edge thickness te	mm
Center thickness tc	mm

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◦Impurities and crystal defects were reduced, and the transmission characteristics in the ultraviolet region were increased. CaF₂ is used for the range from the ultraviolet to the infrared.
◦When compared with other crystals, CaF₂ has high durability to moisture, and it can be treated the same as the general optical elements.
◦Since CaF₂ is isotropic crystal, birefringence (polarization characteristics) does not occur.