SLCFU-25-50P Planoconvex Lens

[Features]
· Calcium fluoride (CaF2) is a crystal with excellent transmission characteristics across a wide wavelength region from UV (200 nm) to near infrared (8 μm). A planoconvex lens that uses this CaF2.
· CaF2 is used over the ultraviolet-infrared region for its high transmittance characteristics in the ultraviolet region, attributable to the lack of impurities and crystal defects.
· Compared to other crystals, CaF2 has higher durability with regard to humidity and can be handled in the same manner as other regular optic elements.
· Because CaF2 crystals are isotropic, there is no double refraction (polarization characteristics).
· * CaF2 crystals have "cleavage," the tendency to split due to sudden temperature changes or impacts.
· * Also, CaF2 has low hardness and can be scratched when contact is made with glass or metals.
· * Be very careful when handling elements.
· * The surface does not have antireflection film coating.
· * With loss due to surface reflection (3% per surface), the transmittance is approximately 94%.
[Product Specifications]
· [ Common Specifications]
· Material: CaF2 for Optics
· Design Wavelength: 5 μm
· Coating: Non-Coated
· Surface Reflectance: 3% (per surface)
· Shape: Spherical plano-convex, both surfaces polished
· Eccentricity: < 3'
· Effective Diameter: 90% of External Diameter
· Scratch-Dig: 60-40
· [Individual Specifications]
· Focal distance f: 50 mm
· Back focus fb: 48 mm
· Rim thickness te: 2.0 mm
· Central thickness tc: 6.4 mm