Description
SHAPE OPTICS Calcium Fluoride (CaF2) Vacuum UV Grade Window Specifications
| Parameter | Specification |
|---|---|
| Abbe Number (v_d): | 94.99 |
| Bevel: | Protective as needed |
| Clear Aperture CA (mm): | 4.50 |
| Clear Aperture (%): | 90 |
| Diameter (mm): | +0.0/-0.1 |
| Thickness (mm): | ±0.1 |
| Coating: | BBAR (1650-3000nm) |
| Coating Specification: | R_avg <1% @ 1650-3000nm<br>R_abs <2% @ 1650-3000nm |
| Density (g/cm³): | 3.18 |
| Coefficient of Thermal Expansion CTE (10^-6/°C): | 18.85 |
| Edges: | Fine Ground |
| Index of Refraction n_d: | 1.434 |
| Knoop Hardness (kg/mm²): | 158.3 |
| Poisson’s Ratio: | 0.26 |
| Parallelism (arcmin): | <1 |
| Substrate: | Calcium Fluoride (CaF2), Vacuum UV Grade |
| Surface Quality: | 40-20 |
| Surface Flatness (P-V): | λ/2 |
| Type: | Protective Window |
| Wavelength Range (nm): | 1650 – 3000 |
| Axis Orientation: | Random |
| Young’s Modulus (GPa): | 75.8 |
These specifications provide detailed information about the SHAPE OPTICS Calcium Fluoride (CaF2) Vacuum UV Grade Window. Designed for high-performance optical applications, these windows offer low absorption and high transmission with a broad wavelength range of 1650 – 3000 nm. The BBAR coating ensures minimal reflection losses, making them suitable for laser systems, spectroscopy, and other precision optical applications.
Applications:
- Laser Systems:
- Excimer Lasers: The high bulk damage threshold and low absorption make CaF2 windows suitable for use in excimer laser systems.
- General Laser Systems: Ideal for a variety of laser systems requiring high transmission and low absorption.
- Protective Windows:
- Gas Detectors: Suitable for use as protective windows in gas detectors operating in the Vacuum UV (VUV) and MWIR regions.
- Thermal Imaging: Excellent for cryogenically cooled thermal imaging systems where high transmission in the MWIR is required.
- Spectroscopy Systems:
- UV Spectroscopy: Perfect for UV spectroscopy systems due to their high transmission in the UV range.
- Wideband Substrates: Used as substrates for coatings that require wideband substrate transmission.
Product Description:
- Material Properties:
- High Transmission: Uncoated CaF2 windows provide high transmission from 200 nm to 7000 nm.
- AR Coatings: Various AR coatings are available to enhance performance in specific wavelength regions.
- Design Options:
- Standard Windows: Available in standard flat window designs for general optical applications.
- Wedged Windows: Also available in a wedged design to minimize interference effects and improve measurement accuracy.
Specifications for Calcium Fluoride (CaF2) Windows:
| Parameter | Specification |
|---|---|
| Diameter (mm): | Customizable |
| Coating Options: | Uncoated, AR Coated (250 – 5000 nm) |
| Wavelength Range (nm): | 200 – 7000 |
| Index of Refraction n_d: | 1.434 |
| Surface Quality: | 60-40 |
| Bulk Damage Threshold: | High |
| Design Options: | Standard, Wedged |
Conclusion
SHAPE OPTICS Calcium Fluoride (CaF2) Windows are designed for high-performance optical applications, providing low absorption and high transmission from 200 nm to 7000 nm. Available with various AR coatings and in both standard and wedged designs, these windows are ideal for laser systems, protective applications in gas detectors and thermal imaging, and UV spectroscopy systems. The low index of refraction and high bulk damage threshold make CaF2 windows a versatile and reliable choice for demanding optical environments.
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