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Calcium Fluoride Optical Material for Precision Optical Components

Calcium fluoride material solutions for UV and infrared windows and lenses requiring broad transmission, low absorption and optical stability.

Chenyu Optics provides calcium fluoride optical material solutions and precision manufacturing capability for UV and infrared optical components. Calcium fluoride (CaF2) is widely selected for optical windows and lenses due to its broad spectral transmission, low absorption and excellent performance in UV, visible and infrared applications.

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Calcium fluoride optical material and precision CaF2 optical components

Calcium Fluoride Optical Material Overview

Calcium fluoride (CaF2) is a crystalline optical material widely used for ultraviolet, visible and infrared optical applications.

Its broad transmission range, low absorption and low refractive index make it suitable for demanding optical systems including spectroscopy, laser systems, imaging equipment and infrared instruments.

Engineers commonly select calcium fluoride for UV optical windows, IR optical windows, UV lenses, IR lenses and spectroscopy components requiring broad wavelength coverage and low dispersion.

Chenyu Optics manufactures custom calcium fluoride optical components according to drawings, including windows, lenses and other precision optical parts.

Technical Parameter Typical Value Engineering Significance
Composition Calcium fluoride (CaF2) Crystalline composition supports broad UV-to-infrared transmission and precision optical manufacturing.
Material Type Optical Crystal Material Selected and processed for consistent UV, visible and infrared optical performance.
Crystal Structure Cubic Crystal Cubic crystal structure provides isotropic optical behavior for precision optical design.
Thermal Expansion Low thermal expansion compared with many optical glasses Supports stable optical performance across controlled temperature changes.
Transmission Approx. 0.18–8 μm Supports ultraviolet, visible and compatible infrared optical applications.
Density Approx. 3.18 g/cm³ Relevant to component weight, mounting and precision optical assembly design.
Refractive Index Approx. 1.43 @ 589 nm Low refractive index and dispersion support optical design and coating selection.
Typical Components UV windows, IR windows, UV lenses and IR lenses Used where broad spectral transmission, UV performance, infrared performance and low dispersion are required.

Values are general engineering references rather than guaranteed component specifications. Actual performance depends on calcium fluoride grade, wavelength, thickness, surface finish and coating.

Key Properties of Calcium Fluoride Material

Calcium fluoride is selected when broad UV-to-infrared transmission, low absorption and low dispersion are required.

Broad UV Transmission

Calcium fluoride provides excellent ultraviolet transmission and is widely used in UV optical systems.

Broad Infrared Transmission

CaF2 provides useful infrared transmission for spectroscopy and infrared optical applications.

Low Absorption

Low absorption characteristics make calcium fluoride suitable for high-performance optical transmission systems.

Low Dispersion

Low dispersion properties support precision imaging and optical system design.

High Optical Stability

Calcium fluoride provides stable optical performance for demanding scientific and industrial applications.

Property System Benefit Design Consideration
Broad UV Transmission Supports ultraviolet imaging and spectroscopy Material grade and thickness should match the required UV wavelength.
Broad Infrared Transmission Supports compatible infrared optical systems The complete operating band and transmission target should be confirmed.
Low Absorption Helps maintain optical throughput Purity, thickness, wavelength and surface finish affect total transmission.
Low Dispersion Supports precision imaging and optical design System-level chromatic performance should be evaluated across the operating band.
High Optical Stability Supports scientific and industrial optical instruments Mounting, thermal conditions, surface quality and coating should be specified.

How to Select Calcium Fluoride Optical Material

Engineers should select calcium fluoride by evaluating wavelength coverage, absorption, dispersion, optical quality and manufacturing requirements together.

Choose Calcium Fluoride When

UV transmission is required
The optical system requires strong ultraviolet transmission.
Infrared transmission is required
The application requires useful transmission into compatible infrared wavelengths.
Low absorption is important
The optical path requires low material absorption across the operating band.
Low dispersion optical performance is needed
Precision imaging or optical design requires low chromatic dispersion.
Spectroscopy or laser applications require broad wavelength coverage
Broad UV-to-infrared coverage supports spectroscopy and compatible laser systems.

Consider Alternatives When

Extreme mechanical hardness is required
Consider sapphire where exceptional hardness and abrasion resistance are required.
Long-wave infrared beyond CaF2 range is required
Consider ZnSe, ZnS or germanium for longer infrared wavelengths.
Very low thermal expansion is required
Consider fused silica when extremely low thermal expansion is required.
Selection Step Question Information Required
1. Wavelength Does calcium fluoride transmit the complete operating band? Minimum wavelength, maximum wavelength and transmission target
2. Environment What UV and infrared performance is required? UV cutoff, infrared limit, absorption target and operating environment
3. Mechanical Load What mechanical and thermal conditions must the component withstand? Pressure, impact, aperture, thickness and mounting method
4. Optical Quality How precisely must the component control the beam? Surface quality, flatness, parallelism and transmitted wavefront
5. Coating Is reduced surface reflection required? Wavelength, bandwidth, angle of incidence and operating environment

Calcium Fluoride Compared with Other Optical Materials

Preliminary comparison for engineers selecting materials by optical range, environmental performance and application.

Material Main Advantage Typical Transmission Range Application Suitability
Calcium Fluoride Broad UV-to-infrared transmission and low dispersion 0.18–8 μm UV optics, IR optics and spectroscopy
Fused Silica Low thermal expansion and excellent UV performance 0.18–2.5 μm Laser optics and UV windows
Sapphire High hardness and environmental durability 0.17–5.5 μm Protective windows and harsh environments
Zinc Selenide (ZnSe) Broad infrared transmission 0.5–16 μm CO2 lasers and thermal imaging
Germanium Strong MWIR and LWIR transmission 2–14 μm Thermal imaging systems

Transmission ranges are approximate and vary by material grade, thickness and coating. Fused silica is generally preferred for UV transmission and low thermal expansion; alternative materials may be better for greater hardness or longer infrared wavelengths.

Calcium Fluoride Optical Applications

Calcium fluoride is used for UV and IR windows, UV and IR lenses, laser systems and spectroscopy requiring broad optical transmission.

OW

UV Optical Windows

CaF2 windows provide ultraviolet transmission for UV imaging, spectroscopy and optical instruments.

LS

IR Optical Windows

Calcium fluoride windows support infrared transmission applications requiring low absorption.

IS

UV Optical Lenses

Precision CaF2 lenses are used in UV imaging and optical systems requiring low dispersion.

IR

IR Optical Lenses

CaF2 infrared lenses support spectroscopy and infrared imaging applications.

SE

Laser and Spectroscopy Systems

Calcium fluoride components are widely used in laser systems and analytical optical instruments.

Application Primary Fused Silica Function Important Specification
UV Optical Window Ultraviolet transmission for imaging and instruments UV wavelength, thickness, surface quality and coating
IR Optical Window Low-absorption infrared transmission IR wavelength, thickness, flatness and coating
UV Optical Lens UV imaging and low-dispersion beam control Radius, centration, surface quality and UV coating
IR Optical Lens Infrared imaging and spectroscopy Operating band, geometry, surface finish and IR coating
Laser and Spectroscopy System Broadband optical transmission Wavelength, absorption, surface quality and coating

Custom Calcium Fluoride Manufacturing Capability

Chenyu Optics manufactures custom calcium fluoride optical windows and lenses according to drawings, wavelengths and operating requirements.

Precision Machining

Custom calcium fluoride windows and lenses are manufactured according to customer drawings.

Optical Polishing

Precision polishing is provided for CaF2 optical surfaces with controlled surface quality.

Custom Dimensions

Round, rectangular and custom-geometry components are available.

Surface Quality Control

Flatness, surface quality and dimensional accuracy are controlled according to drawing requirements.

AR Coating Options

UV, VIS and IR anti-reflection coatings are available according to wavelength, angle and environmental requirements.

Component Parameter Available Configuration Specification Basis
Geometry Round, square, rectangular or custom Component function and assembly interface
Dimensions Custom to drawing Material availability and manufacturability review
Surface Quality Precision optical finish Imaging, sensing, laser and transmission requirements
Flatness Custom optical specification Wavelength, aperture and wavefront requirement
Parallelism Controlled to drawing Beam deviation and alignment requirements
Coating AR or BBAR options Wavelength, bandwidth, angle and environment

Calcium Fluoride Optical Windows

Custom CaF2 windows for UV, visible and infrared optical systems.

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Calcium Fluoride Optical Lenses

Custom CaF2 lenses for UV, infrared, spectroscopy and imaging systems.

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UV Optical Components

Precision UV windows, lenses and custom optical components for ultraviolet systems.

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Infrared Optical Components

Precision infrared windows, lenses and custom components for compatible IR systems.

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Calcium Fluoride Optical Material Engineering FAQ

What is calcium fluoride optical material?

Calcium fluoride is a cubic crystalline optical material used for UV, visible and infrared windows, lenses and precision components requiring broad transmission and low dispersion.

What wavelength range does CaF2 transmit?

Optical-grade CaF2 typically provides useful transmission from approximately 0.18 to 8 μm. Actual performance depends on material grade, thickness, surface finish and coating.

Why is calcium fluoride used for UV optics?

Calcium fluoride provides strong UV transmission, low absorption and low dispersion, making it suitable for UV imaging, spectroscopy and compatible laser optics.

Can calcium fluoride be used for infrared applications?

Yes. Calcium fluoride provides useful infrared transmission into the mid-infrared region and is used for spectroscopy, imaging and analytical instruments within its specified wavelength range.

What is the difference between CaF2 and fused silica?

CaF2 offers broader infrared transmission and lower dispersion, while fused silica generally provides lower thermal expansion and strong UV performance. Selection depends on wavelength and operating conditions.

Can Chenyu Optics manufacture custom CaF2 windows and lenses?

Yes. Chenyu Optics manufactures drawing-defined CaF2 windows and lenses with controlled dimensions, surface quality, flatness and UV, VIS or IR coating options.

Need a Custom Calcium Fluoride Optical Solution?

Chenyu Optics manufactures calcium fluoride optical windows and lenses according to drawings, wavelength requirements and application specifications for UV, infrared and precision optical systems.

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