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Chalcogenide Glass Lens IRG204 for Mid- and Far-Infrared Applications

Chalcogenide Glass Lens

Material: Chalcogenide Glass IRG204

Product Introduction

This product is made of high-performance chalcogenide glass IRG204, exhibiting excellent mid- and far-infrared transmittance and suitable for wide-band optical systems from 0.8 to 19 μm.

The material itself possesses a high refractive index (n ≈ 2.7658 @ 1.6 μm) and low dispersion (ν_10.6 = 132.77), which can effectively improve optical performance in multi-band imaging systems.

By optimizing the composition ratio, the introduction of antimony and tin elements not only enhances the structural stability of the glass, but also improves its reliability under complex environmental conditions such as temperature variations and humidity.

Working Principle

The chalcogenide glass lens efficiently transmits mid- and far-infrared light, while its multi-layer optical coating design enhances the overall optical performance of the system.

The lens is often used with an inner-surface anti-reflection (AR) coating to reduce reflection loss and improve image clarity. The outer surface can be coated with a diamond-like carbon (DLC) film to enhance abrasion resistance, moisture and heat resistance, and surface hardness, significantly extending the product's service life and improving stability in demanding environments.

Production Process

Glass Melting: High-purity raw materials with precise proportions are melted and molded to ensure uniform and stable material composition.
Rough Processing: The initial lens shape is formed using processes such as rolling and cutting.
Precision Machining: High-precision processes such as milling, fine grinding, and polishing are used to ensure that geometric and optical parameters, including surface shape, thickness, and flatness, meet specified standards.
Surface Treatment: Customized optical coatings for the inner and outer surfaces, such as AR and DLC functional films, can be applied according to customer requirements to improve optical performance, durability, and environmental resistance.

Application Areas

Infrared thermal imaging and detection systems
Industrial infrared imaging and gas analysis equipment
Optical components for laser systems
Environmental monitoring and scientific research instruments

Tags: chalcogenide glass lens, IRG204 lens, chalcogenide glass IRG204, infrared lens, infrared optical lens