Sizes and coatings are available upon your request. You could send us your
specifications or drawings. We will be happy to return a quotation ASAP as
the average response time is within 24 hours. Meanwhile our optical designers
are always available to assist with your special needs, and our factories in
China are ready to meet your quantity requirements.
Calcium fluoride is often used in spectroscopic lenses due to its high transmission
from 250nm 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 laser optics. Calcium fluoride's low refractive index
allows it to be used without an antireflective coating.
Specifications:
1) Material: calcium fluoride single crystal
2) Diameter tolerance: ±0.0, -0.1mm
3) Thickness tolerance: ±0.2mm
4) Clear aperture: >80%
5) Parallelism: 1' arc minute or as requested
6) Surface quality: 80 - 50 scratch and dig, or as requested
7 Flatness: λ/2 at 632.8mm
8) Bevel: < 0.25mm x 45º
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