Calcium Fluoride (CaF2) Windows

Products Overview:

Calcium Fluoride (CaF2) Windows are designed to deliver exceptional performance across a broad range of applications, spanning deep ultraviolet UV 193nm to near-infrared (IR) spectra 8µm. These windows offer high transmission, low absorption, and minimal signal loss, making them ideal for a variety of optical systems, such as thermal imaging systems, Fluorescence Imaging, as well as FTIR analysis.

AR coatings are applied for increased transmission for the wavelengths and other specified orientations cut to <100> <110> <111> in optical grades of Monocrystalline and Polycrystalline material. The benefit of the UV grade material, it has no absorption in lower wavelengths to the IR grade.

Features:

1. Optical Properties

• Wide Transmission Range: CaF2 Windows have a broad transmission range in the infrared region. They can transmit light from the ultraviolet (UV) to the far - infrared (FIR) wavelengths. For example, they are effective in transmitting light in the range of approximately 0.15 - 8 micrometers. This makes them suitable for various optical applications such as infrared spectroscopy and thermal imaging systems.

• Low Absorption: The material has low absorption characteristics in the specified wavelength range. This means that it allows a high percentage of the incident light to pass through, with minimal loss of signal strength. In applications like laser systems, where the intensity of the light beam is crucial, the low absorption of CaF2 Windows helps to maintain the power of the laser beam as it passes through the window.

2. Mechanical Properties

• Good Mechanical Strength: CaF2 Windows are relatively strong and can withstand a certain amount of mechanical stress. They can be used in environments where there might be some physical contact or pressure without easily breaking. For example, in some industrial optical setups where the window might be exposed to vibrations or occasional impacts, the mechanical strength of CaF2 Windows helps to ensure their durability.

• Low Density: The density of CaF2 is relatively low compared to some other optical materials. This is an advantage in applications where weight is a concern. For instance, in aerospace - related optical instruments, using CaF2 Windows can help to reduce the overall weight of the equipment.

3. Chemical Properties

• Chemical Stability: CaF2 Windows are chemically stable under normal conditions. They are resistant to many common chemicals and do not easily react with substances such as water, acids (within a certain concentration range), and bases. This stability is important for maintaining the optical performance of the windows over time. For example, in a laboratory environment where there are various chemicals present, the chemical stability of CaF2 Windows ensures that their optical properties are not compromised by exposure to these chemicals.

• Hygroscopic Nature: However, it should be noted that CaF2 is slightly hygroscopic, meaning it can absorb moisture from the air. Proper storage and handling are required to prevent moisture - related degradation of the material.

Applications:

1. Optical Systems

• UV and IR Optical Windows: CaF2 Windows are highly transparent in the ultraviolet (UV) and infrared (IR) spectra, making them ideal for spectroscopic devices and remote sensing equipment. They allow precise measurement and analysis of spectral data.

• Laser Systems: CaF2 Windows are used in high-power laser systems, including excimer lasers, due to their low absorption and high damage threshold. They can transmit high-energy light without significant distortion or damage.

• Infrared Spectroscopy: These windows are commonly used in Fourier Transform Infrared (FTIR) spectrometers for their broad transmission range.

• Astronomical and Aerospace Optics: CaF2 Windows are utilized in telescopes and space optics due to their clarity and durability.

2. Imaging and Detection

• Thermal Imaging Systems: CaF2 Windows are essential for IR thermal imaging and night vision applications. They help capture thermal images and measure temperature variations.

• X-ray and Gamma-ray Detectors: CaF2 is used as a scintillation detector material for X-ray and gamma-ray detection.

3. Medical and Scientific Instruments

• Medical Imaging: CaF2 Windows are used in diagnostic and analytical devices requiring superior optical clarity. For example, they are used in UV lithography and other precision optical applications.

• UV Filters and Lenses: CaF2 is used in UV filters and lenses to protect the eyes and skin from UV radiation in various applications, including sunglasses and camera filters.

4. Industrial Applications

• Gas Detection: CaF2 Windows are used as protective windows for gas detectors operating in the Vacuum UV (VUV) and Mid-Wave Infrared (MWIR) ranges.

• Photolithography: In the semiconductor industry, CaF2 Windows are integral to photolithography systems that produce microchips, where transparency to deep UV is required for accurate patterning.

5. Laboratory and Research

• Spectroscopic Instruments: CaF2 Windows enable precise sample analysis across UV, visible, and IR wavelengths in spectroscopic instruments. Their high transmission rates and low absorption levels empower researchers to investigate samples thoroughly.

Specifications with Customized: