Calcium Fluoride (CaF2) Optical Windows
CaF2

Calcium Fluoride (CaF2) Optical Windows

Price range: $79.00 through $329.00

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CaF2 (Calcium Fluoride) Optical Windows / CaF2 Infrared Windows / Polished CaF2 Substrates

Product Overview
Calcium Fluoride (CaF2) is a high-performance optical material widely used for ultraviolet (UV), visible, and infrared (IR) applications. It provides excellent transmission from vacuum UV to infrared wavelengths and is ideal 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

Key Features
Wide transmission from UV to IR
High optical transparency (up to ~94%)
Low refractive index
Low absorption and high laser resistance
Non-hygroscopic and chemically stable
Easy machining and polishing
Long service life

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 safe transport

Customization
Custom sizes and thickness available
Double-side or single-side polishing optional
AR coating available upon request
OEM shapes supported

option

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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