CaF₂ (Calcium Fluoride) Optical Windows / CaF₂ Infrared Windows / Polished CaF₂ Substrates
Product Overview
Calcium Fluoride (CaF₂) is an optical material used for ultraviolet (UV), visible, and infrared (IR) applications. It provides transmission from vacuum UV to infrared wavelengths and is used for optical windows, laser systems, spectroscopy, and precision optical substrates.
With low absorption, stable polished surfaces, and a low refractive index (~1.46), CaF₂ optics can often be used without anti-reflection coating.
Standard In-Stock Specification
Material: Optical Grade CaF₂ (Single Crystal)
Surface Finish: Double-Side Polished
Standard Size: Dia. 5 × 1 mm
Transmission Range: 130 – 10,000 nm (0.13 – 10 μm)
Transmission: >93% typical (200 nm – 8 μm)
Refractive Index: ~1.46
Sales Unit: In stock, available from 1 piece
Additional Sizes Available
Diameter: 15 – 100 mm
Thickness Options: 0.4 mm / 1 mm / 2 mm / 3 mm
Custom dimensions available upon request
Optical Specifications (Reference)
Surface Quality: 40-20 scratch-dig (or better)
Surface Flatness: λ/2 or λ/4 @ 633 nm (optional)
Parallelism: ≤30 arcsec (or better)
Diameter Tolerance: +0.1 / -0.1 mm
Thickness Tolerance: ±0.1 mm
Surface Roughness: nm-level fine polish
Radius of Curvature: Custom available
Features
Wide transmission from UV to IR
High optical transparency (up to ~94%)
Low refractive index
Low absorption and laser resistance
Non-hygroscopic and chemically stable
machining and polishing
Typical Applications
UV optical windows
Infrared optical windows
Laser windows
Spectroscopy (UV/IR/FTIR)
IR detectors
Optical substrates
Precision lens systems
Handling & Cleaning
Handle with gloves to avoid fingerprints and contamination.
Place optics only on clean optical tissue.
Avoid contact with rough or hard surfaces.
Clean gently using lint-free swabs with alcohol.
Wipe in one direction and allow to dry before use.
Packaging
Cleanroom packaging
Vacuum sealed protection
Individual box packaging for transport
Customization
Custom sizes and thickness available
Double-side or single-side polishing optional
AR coating available upon request
OEM shapes supported
| Option 1 | 15 × 15 × 1 mm, 2″ dia × 0.5 mm with Alignment Flat, 25 × 25 × 1 mm, 50 × 25 × 1 mm, 60 × 60 × 2 mm, Dia. 10 mm × 1 mm, Dia. 100 mm × 0.5 mm, Dia. 100 mm × 1 mm, Dia. 100 mm × 2 mm, Dia. 12.7 mm × 1 mm, Dia. 13 mm × 1 mm, Dia. 16 mm × 0.3 mm, Dia. 18 mm × 1 mm, Dia. 22 mm × 1 mm, Dia. 25 mm × 1 mm, Dia. 30 mm × 1 mm, Dia. 35 mm × 3 mm, Dia. 40 mm × 2 mm, Dia. 42.3 mm × 2.7 mm, Dia. 50 mm × 1 mm, Dia. 50 mm × 2 mm, Dia. 7 mm × 0.5 mm, Dia. 70 mm × 2 mm, Dia. 75 mm × 3 mm |
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