The Important Role of chalcogenide ball lens in Infrared Detection Instruments
Chalcogenide spheres are spherical optical elements made of chalcogenide glass. Chalcogenide glass is an oxygen-free glass mainly composed of sulfur, selenium, tellurium and other elements. It has a special structure and composition, so it exhibits good transmittance, extremely low refractive index temperature coefficient and dispersion performance. These characteristics make chalcogenide spheres play an important role in infrared detection instruments and equipment.
The preparation process of chalcogenide spheres mainly includes the steps of raw material preparation, melting, molding, cooling and subsequent treatment. Among them, molding is one of the key links. The compression molding technology can be used to put the melted chalcogenide glass into a high-precision mold and pressurize it under vacuum and high temperature and high pressure conditions. Compression molding technology can save traditional processing procedures, such as rough grinding, fine grinding, polishing, edge grinding and centering, etc. It has high production efficiency and low processing cost. It can realize mass production and ensure that the surface of the chalcogenide ball lens is smooth, the dimensional accuracy is high and the repeatability is good.
Sulfur-based spheres have a series of excellent performance characteristics, such as:
High transmittance: It has a high transmittance in the infrared band, which can meet the requirements of infrared detection instruments and equipment for optical components.
Low refractive index temperature coefficient: The coefficient of refractive index change with temperature is low, which is conducive to the optical system still having high imaging quality when the temperature changes and maintaining the stability of the system.
Good processing performance: Sulfur-based glass is easy to process and shape, and optical components of various shapes and sizes can be prepared.
Sulfur-based spheres have a wide range of applications in many fields, including but not limited to:
Infrared detection: Sulfur-based spheres are widely used in infrared detection instruments and equipment, such as infrared thermal imagers, infrared night vision devices, etc., due to their good infrared transmittance.
Optical components: Sulfur-based spheres can be used as raw materials for optical components such as lenses and reflectors to manufacture high-precision optical systems.
Other fields: Sulfur-based spheres can also be used in optical fiber communications, laser technology, optical storage, and other fields, as well as additives or fillers for special materials.
Borisun Optics can provide customers with one-stop services from smelting of chalcogenide glass materials to spherical surface processing, spherical preform processing and precision molded coating. Currently, there are 4 grades of chalcogenide glass: WIRG02, WIRG04, WIRG05, and WIRG06, which can be processed into products of various forms. We can provide customers with chalcogenide beads in the size range of φ2mm~φ20mm, which can meet the average transmittance of 8-14um at 64%, and the monthly production capacity is 80,000 pieces.
Parameters
| Diameter | Sphericity | Appearance |
|---|---|---|
| φ2mm-10mm | ＜0.003mm | MIL40-20 |
| φ10.1mm-15mm | ＜0.010mm | MIL60-40 |
| φ15.1mm-20mm | ＜0.015mm | MIL80-50 |
With the development of infrared technology, the application field of chalcogenide beads will continue to expand. In the future, chalcogenide beads will develop towards higher precision, larger size, and more complex shapes. At the same time, the preparation process will also be continuously optimized and innovated to improve the quality and performance of chalcogenide beads.
Product consultation: Jessie@borisuns.com
ABOUT BORISUN
Hanzhong Brisun Optics Co., Ltd. Is the high precision optical element manufacturer provides customized production of Various optical lenses, including spherical lens, cylindrical lens, optical window, mirror, prism, filter, metal base mirror and other high-precision optical elements. The base materials include various optical glass, fused quartz, calcium fluoride (CaF2), zinc selenide (ZnSe), germanium (GE), silicon (SI), sapphire, metal and other materials. And provide antireflective film, high reflection film, spectroscopic film, metal film and other optical coatings.
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