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SLCFU
Lens Type
Diameter φA
Design wavelength
Focal length f
Focal length tolerance
Back focal length fb
Edge thickness te
Center thickness tc
Surface Flatness
Centration
Surface Quality (Scratch-Dig)
Surface roughness
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Calcium fluoride (CaF2) is a crystal which has excellent transmission characteristics in a wide wavelength range from ultraviolet (200nm) to near-infrared (8μm).In addition to the existing plano-convex lens, a new plano-concave lens has been added to the lineup. The surface quality of the lenses is also improved.

◦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.

Related product
Products
Technical Data
Documents/Downloads
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.
▶Custom-made products with higher precision are also available.If you have any requests, please contact our sales.

Attention

▶It may be broken and be cleavaged by a sudden temperature change and shock. CaF2 has low hardness and scratch upon contact with metal and glass. Please use very carefully.
▶There is not an anti-reflection coating on the surfaces and the loss due to surface reflection (3% per surface) results in transmittance of about 94%.
▶If you use the product with dust or debris on the surface, it may not perform at its full potential. In the worst case, damage by laser, etc. may occur.

Common Specifications
MaterialOptical CaF2 Crystal (UV grade )
Clear aperture90% of the diameter
CoatingUncoated
Surface reflectance3% (per one surface)
Outline Drawing

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Schematic

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Wavelength dependency data of the focal length
■SLFCU-25-P

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■SLFCU-25.4-P/12.7-N

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Typical Transmittance Data

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T: Transmission
Physics

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Spec
Compare
Part Number
Add to cart Cart
    JP Yen Stock Qty
SLCFU-25-50P
SLCFU-25-100P
SLCFU-25-150P
SLCFU-25-200P
SLCFU-25.4-40PNEW
SLCFU-25.4-50PNEW
SLCFU-25.4-75PNEW
SLCFU-25.4-100PNEW
SLCFU-25.4-125PNEW
SLCFU-12.7-20NNEW
SLCFU-12.7-25NNEW
SLCFU-12.7-50NNEW

Plano convex

φ25mm

5μm

50mm

±3%

48mm

2mm

6.4mm

< 3′

60-40

Plano convex

φ25mm

5μm

100mm

±3%

98mm

2mm

4.1mm

< 3′

60-40

Plano convex

φ25mm

5μm

150mm

±3%

148mm

2mm

3.4mm

< 3′

60-40

Plano convex

φ25mm

5μm

200mm

±3%

198mm

2mm

3mm

< 3′

60-40

Plano convex

φ25.4mm

355nm

40mm

±1%

34.5mm

2.7mm

8mm

Flat surface λ/4 (PV), Convex surface λ/4 (PV)

< 1′

40-20

Ra < 0.5nm

Plano convex

φ25.4mm

355nm

50mm

±1%

45.9mm

2.0mm

6mm

Flat surface λ/4 (PV), Convex surface λ/4 (PV)

< 1′

40-20

Ra < 0.5nm

Plano convex

φ25.4mm

355nm

75mm

±1%

71.5mm

2.5mm

5mm

Flat surface λ/4 (PV), Convex surface λ/4 (PV)

< 1′

40-20

Ra < 0.5nm

Plano convex

φ25.4mm

355nm

100mm

±1%

96.9mm

2.7mm

4.5mm

Flat surface λ/4 (PV), Convex surface λ/4 (PV)

< 1′

40-20

Ra < 0.5nm

Plano convex

φ25.4mm

355nm

125mm

±1%

122.2mm

2.5mm

4mm

Flat surface λ/4 (PV), Convex surface λ/4 (PV)

< 1′

40-20

Ra < 0.5nm

Plano concave

φ12.7mm

355nm

-20mm

±1%

-21.4mm

4.7mm

2mm

Flat surface λ/4 (PV), Concave surface λ/4 (PV)

< 1′

40-20

Ra < 0.5nm

Plano concave

φ12.7mm

355nm

-25mm

±1%

-26.4mm

4.0mm

2mm

Flat surface λ/4 (PV), Concave surface λ/4 (PV)

< 1′

40-20

Ra < 0.5nm

Plano concave

φ12.7mm

355nm

-50mm

±1%

-51.4mm

2.9mm

2mm

Flat surface λ/4 (PV), Concave surface λ/4 (PV)

< 1′

40-20

Ra < 0.5nm

RoHS  

¥44,400

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RoHS  

¥23,300

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RoHS  

¥23,300

LOW
RoHS  

¥23,300

LOW
RoHS  

¥38,800

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RoHS  

¥37,600

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RoHS  

¥34,200

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RoHS  

¥31,700

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RoHS  

¥31,700

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RoHS  

¥24,200

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RoHS  

¥24,200

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RoHS  

¥24,200

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