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

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details

SLCFU-12.7-20N

12.7mm

20mm

6-12 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

details

SLCFU-25.4-40P

25.4mm

40mm

6-12 weeks

€364.70

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

details

SLCFU-12.7-50N

12.7mm

50mm

1 week

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

details

SLCFU-25.4-125P

25.4mm

125mm

6-12 weeks

€297.90

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

details

SLCFU-25.4-50P

25.4mm

50mm

6-12 weeks

€363.40

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

details

SLCFU-12.7-25N

12.7mm

25mm

6-12 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

details

SLCFU-25.4-75P

25.4mm

75mm

6-12 weeks

€321.50

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

details

SLCFU-25.4-100P

25.4mm

100mm

6-12 weeks

€297.90

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.