Custom High Transmission 8-12μm Zinc Selenide ZnSe Plano Concave Lens with Coating for Infrared FTIR Spectrometer

Name: Custom High Transmission 8-12μm Zinc Selenide ZnSe Plano Concave Lens with Coating for Infrared FTIR Spectrometer
Brand: Henan UM Optics Ltd
Availability: InStock

Description

Zinc Selenide (ZnSe) plano-concave lenses are professional infrared optical components featuring one flat surface and one concave curved surface. Manufactured from high-purity CVD-grown ZnSe material, this negative focal length lens possesses ultra-low infrared absorption and excellent mid-infrared transmittance. With stable internal uniformity and smooth polished surface, it is specially designed for infrared beam divergence, beam expansion and optical aberration compensation. It maintains reliable optical performance in long-term infrared laser operation, becoming an essential optical element for CO₂ laser equipment and mid-infrared optical systems.

Specifications

Material:	ZnSe
Lens Type:	Plano-Concave
Size:	custom
Dimension Tolerance:	+0/-0.1mm
Surface Quality:	60-40,40-20,or better
Surface Flatness:	4/λ

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Features

Superior Mid-infrared Transmittance: Low optical loss at 10.6μm, perfectly adapted for CO₂ laser working band
Ultra-low Bulk Absorption: Minimal heat accumulation to prevent thermal deformation under continuous laser irradiation
High Purity CVD Material: Few internal inclusions and defects to ensure uniform infrared beam transmission quality
Stable Thermal Optical Performance: Low thermal lensing effect to keep consistent optical parameters during long-time operation
Coating Compatibility: Supports customized infrared anti-reflection coating to reduce surface reflectivity

Applications

CO₂ Laser Beam Expansion: Used for expanding laser beam diameter in industrial laser marking and cutting equipment
Infrared Optical Assembly: Matches with convex lenses to eliminate system aberration and optimize infrared optical path
Mid-infrared Spectroscopy: Applied for beam diffusion and light path debugging in infrared gas detection instruments
Laser Calibration Systems: Suitable for infrared laser collimation adjustment and laser auxiliary focusing assembly
Infrared Scientific Research: Ideal for laboratory mid-infrared optical experiments and beam shaping platforms

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Frequently Asked Questions

Why use ZnSe for infrared concave lens instead of other materials?

ZnSe has extremely low absorption at CO₂ laser wavelength, excellent internal uniformity and no thermal distortion, which is irreplaceable for low-loss infrared laser transmission.

Can ZnSe plano-concave lens work without coating?

It can be used uncoated for simple infrared optical paths; IR AR coating is strongly recommended for industrial CO₂ lasers to reduce reflection loss.

Is ZnSe plano-concave lens suitable for visible light system?

No. ZnSe has high absorption and yellow tint in visible range, exclusively designed for mid-infrared and CO₂ laser applications.

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