Hellma Calcium Fluoride Optical Crystal Material

Hellma Calcium Fluoride Optical Crystal MaterialCaF2 circular sheet

Since 1922, the Hellma brand has been dedicated to precision machining of glass, quartz, and crystal materials in the optical field, maintaining stable process standards and machining accuracy.

Hellma is deeply involved in the research and preparation of high-purity synthetic crystals, adapting to strict usage standards in fields such as optics, semiconductors, radiation detection, and security. Relying on mature technologies related to melt controlled crystallization, we ensure the consistency of quality and process stability of various crystal products.

Hellma calcium fluoride can be applied in micro lithography, conventional optics, laser technology, radiation detection and other scenarios; Germanium and silicon materials are mainly suitable for the field of infrared optics and can be used for the production of lenses and window components in thermal imaging cameras, night vision devices, and spectral analysis systems.

Germanium materials have good transmittance in the infrared spectral range of 2-14 microns, making them suitable for infrared related applications. Silicon materials have good mechanical properties and high refractive index, and are commonly used in the processing of infrared optical system lenses and mirror components. Both types of materials have various shapes and size specifications, which can be customized to meet the needs of different working conditions.

Calcium fluoride crystals have a wide transmission range of ultraviolet, visible, and infrared spectra, as well as good environmental resistance, making them suitable for various harsh working conditions in scientific research and industrial fields.

Calcium fluoride has low refractive index characteristics, with a refractive index of nd=1.43384, making it suitable for high-power laser applications.

Calcium fluoride has low spectral dispersion characteristics, with an Abbe number of vd=95.23, which can effectively control the color difference in optical systems.

Calcium fluoride has good tolerance to excimer lasers and is suitable for the 193 nm and 248 nm operating bands, which can improve the service life of laser components.

Calcium fluoride has a wide range of high transmittance characteristics from deep ultraviolet to infrared, with a transmittance range covering 130 nm to 8 µ m. It maintains good transmittance performance in the ultraviolet, visible, and infrared bands.

The maximum processing size of calcium fluoride semi-finished products can reach 440 mm, which can meet the large-sized material requirements of application scenarios.

CaF2 circular sheet

Material: CaF2 193nm grade (LD-A), single crystal, crystal orientation<111>

Circular piece specification: diameter 100.0 mm × 50.0 mm (double plane)

公差：直径 (± 0.5 mm)； 厚度 (± 0.5 mm)

Surface smoothness: Grinding (Rq 2 µ m)

Protective chamfer: 1.5 mm

0/≤ 1 nm/cm (stress birefringence)

Hellma Calcium Fluoride Optical Crystal MaterialCaF2 circular sheet