ZnSe & Fused Silica Laser Focusing Lens

Description

Zinc selenide is a commonly used optical glass material in the infrared band with a transmission band of 600nm-16μm. It has low absorption and thermal shock resistance, and is commonly used in thermal imaging systems, as well as in some visible optical systems, and can be used as a substrate for a variety of optical components. Zinc selenide (ZnSe) plano-convex (PCX) lenses are mainly used for focusing or collimating applications in the mid-wave and long-wave infrared spectra. ZnSe PCX lenses focus light into a single point and are commonly used for aiming and focusing monochromatic light sources.

Specifications

Material:	ZnSe
Diameter:	50.8 mm
Focal Length:	150 mm
Edge Thickness, Te:	2.5 mm
Lens Type:	Plano-Convex
Diameter Tolerance:	+0/-0.1mm
Thickness Tolerance:	±0.1mm
Surface Quality:	60-40 Scratch-dig
Surface Accuracy:	1/4 lambda

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Features

High transmittance: ZnSe offers excellent transmission in the mid-infrared range
Low absorption: Minimal energy loss makes it suitable for high-power laser systems.
Thermal stability: Maintains performance under high-temperature conditions.
Durable coating compatibility: Supports anti-reflective or protective coatings for enhanced efficiency.

Applications

CO2 laser systems: Widely used for focusing and directing high-power infrared laser beams.
Thermal imaging: Enhances resolution in infrared cameras and sensors.
Spectroscopy: Facilitates precise light focusing in gas analysis or material characterization.
Medical devices: Applied in laser surgery or dermatology for targeted energy delivery.
Industrial processing: Enables precision cutting, welding, and engraving in manufacturing.

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Henan UM Optics Ltd ✓ Verified Supplier

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since 2024

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Frequently Asked Questions

What makes ZnSe a preferred material for focusing lens in mid-infrared applications?

ZnSe offers high transmittance (＞70%) in the mid-infrared range (8–12 μm), making it ideal for systems like CO₂ lasers and thermal imaging.

How does ZnSe compare to germanium (Ge) or silicon (Si) in laser applications?

Unlike Ge or Si, ZnSe has lower absorption and better thermal stability under high-power laser exposure, reducing thermal lensing effects.

What coatings are recommended for ZnSe lens in thermal imaging systems?

For 3–5 μm or 8–12 μm thermal imaging bands, we apply broadband anti-reflective (AR) coatings that reduce surface reflections to

Can UM Optics customize znse plano convex lens for high-volume industrial laser systems?

Yes. As a factory, we support mass production of standard or custom ZnSe plano convex lens for laser equipment manufacturers. We offer automated polishing and quality control to ensure batch consistency, with competitive pricing for large orders.

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