Calcium Fluoride (CaF2) Optical Windows
CaF₂

Calcium Fluoride (CaF₂) Optical Windows

Price range: £94.99 through £394.99

Select an option to request a quote

Flat rate shipping £15

    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 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

    Related products