Factory Custom Optical BaF2 Barium Fluoride Plano Concave Lens

Name: Factory Custom Optical BaF2 Barium Fluoride Plano Concave Lens
Brand: Henan UM Optics Ltd
Availability: InStock

Description

Barium Fluoride (BaF₂) Plano-Concave Lenses are high-precision negative focal length optical components with a distinct plano-concave structure—featuring one flat (plano) surface and one spherical concave surface. Crafted from high-purity BaF₂ crystal, these lenses boast core features including minimal birefringence, superior radiation resistance, and excellent optical homogeneity; they offer an ultra-broad spectral transmission range of 0.15μm (deep ultraviolet, DUV) to 14μm (long-wave infrared, LWIR). They are widely applied in aerospace, scientific research, laser systems, defense equipment, and spectral analysis, serving as versatile multi-spectral optical components.

Specifications

Material:	BaF2
Diameter:	12.7 mm
Focal Length:	-75 mm
Edge Thickness, Te:	3 mm
Lens Type:	Plano-Concave
Dimension Tolerance:	+0/-0.1mm
Surface Quality:	60-40,40-20,or better
Flatness:	1/4λ

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Features

Ultra-Broad Spectral Transmission: Boasts an exceptional transmission range of 0.15μm to 14μm (from DUV to mid-IR)
High-Purity Optical Material: Crafted from high-purity synthetic BaF₂ crystal with excellent optical homogeneity, low internal stress, and minimal impurities, ensuring low light scattering and stable optical performance even in extreme conditions
Superior Radiation Resistance: Exhibits stronger resistance to high-energy radiation compared to calcium fluoride, making it suitable for use in high-radiation environments such as nuclear detection, high-energy physics experiments, and aerospace optical systems
Stable Thermo-Mechanical Performance: Features a moderate thermal expansion coefficient (18.1×10⁻⁶/°C @ 273K), high melting point (1280°C), and good thermal conductivity (11.72 W·m⁻¹·K⁻¹ @ 286K), ensuring stable operation in a wide temperature range (-40℃ to 100℃)
Good Scintillation Properties: Possesses fast scintillation response with dual emission peaks (220nm fast component and 310nm slow component), making it suitable for radiation detection and particle counting applications in addition to optical imaging

Applications

Laser Systems: Used in laser beam expansion (Galilean structure), beam divergence, and aberration compensation for DUV, visible, and IR lasers; suitable for laser cutting, welding, marking, and high-power laser systems where broad spectral transmission and radiation resistance are required
Thermal Imaging & Cryogenic Systems: Integrated into cryogenic refrigeration imaging systems and thermal cameras for MWIR (3-5μm) thermal imaging, widely used in aerospace, defense, and industrial temperature monitoring applications
Spectroscopy & Scientific Research: Applied in spectrophotometers, monochromators, and spectrometers for DUV to mid-IR spectroscopy; used in high-energy physics, material science, and atmospheric research due to its broad transmission and radiation resistance
Aerospace & Defense: Utilized in aerospace optical systems, satellite-borne sensors, and defense equipment (e.g., night vision devices, missile guidance systems) for its stability in extreme temperatures and radiation resistance
Radiation Detection: Used in scintillation detectors, nuclear radiation monitoring equipment, and particle detectors, leveraging its fast scintillation response and high radiation resistance
Optical Communication & Fiber Optics: Employed in fiber coupling systems and IR optical communication devices to adjust beam divergence angles and improve coupling efficiency, especially in mid-IR communication bands
Medical & Biomedical Optics: Used in IR diagnostic equipment, medical spectroscopy, and endoscopic systems where broad spectral transmission and biocompatibility (in dry environments) are required

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China

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Henan UM Optics Ltd

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since 2024

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Frequently Asked Questions

What is the maximum operating temperature of BaF₂ plano-concave lenses?

They can operate stably in dry environments up to 500°C, with stable optical performance across a wide temperature range (-40℃ to 500℃).

What is the difference between BaF₂ plano-concave and double concave lenses?

Plano-concave lenses (one flat, one concave) have moderate divergence and are ideal for aberration correction; double concave lenses (two concave surfaces) have stronger divergence and shorter negative focal lengths.

What are the key differences between single-crystal and polycrystalline BaF₂ plano-concave lenses?

Single-crystal BaF₂ has excellent optical homogeneity, low scatter, and full 0.15μm–14μm transmission; polycrystalline BaF₂ has more light scatter, lower transmittance, and poorer uniformity, unsuitable for high-precision systems.

How does crystal orientation affect the performance of BaF₂ plano-concave lenses?

Proper crystal orientation (e.g., [111], [100]) ensures minimal birefringence and uniform transmission; incorrect orientation may increase birefringence, leading to polarization distortion and reduced optical quality.