Uncoated, Optics Zinc Sulfide (ZnS) Window

Description

SHAPE OPTICS Zinc Sulfide (ZnS) Clear Grade Protective Window Specifications

Parameter	Specification
Bevel:	Protective as needed
Clear Aperture CA (mm):	–
Clear Aperture (%):	85
Diameter (mm):	– +0.00/-0.13
Thickness (mm):	±0.13
Coating:	Uncoated
Density (g/cm³):	4.08
Coefficient of Thermal Expansion CTE (10^-6/°C):	6.8
Edges:	Fine Ground
Index of Refraction n_d:	2.371
Knoop Hardness (kg/mm²):	210
Poisson’s Ratio:	0.27
Parallelism (arcmin):	<3
Substrate:	Zinc Sulfide, Clear Grade
Surface Quality:	60-40
Surface Flatness (P-V):	λ/20 @ 10.6µm
Type:	Protective Window
Wavelength Range (nm):	400 – 12000
Young’s Modulus (GPa):	74.5
Model Number:

Material Characteristics:

1. Chemical Vapor Deposition (CVD):
   • ZnS is produced using the CVD process, resulting in a high-purity material with excellent optical properties and mechanical strength.
2. Optical Performance:
   • Transmission: High transmittance from visible to infrared wavelengths (0.4 – 12 µm).
   • Scatter: Low scatter ensures high-quality imaging and accurate sensor readings.
3. Mechanical and Chemical Properties:
   • Hardness: Moderately hard, offering better durability than ZnSe.
   • Chemical Stability: Resistant to most acids and alkalis, with better chemical durability compared to ZnSe.

Applications:

1. Imaging Systems:
   • Dual Spectrum Imaging: Suitable for systems featuring both visible and thermal imaging paths.
   • Thermal Cameras: Used in thermal imaging cameras for clear IR transmission.
2. Military and Defense:
   • Night Vision: Employed in night vision equipment that requires high IR transmittance and durability.
   • Missile Guidance: Used in missile guidance systems where both visible and IR sensors are needed.
3. Industrial Sensing:
   • Environmental Monitoring: Ideal for sensors in environmental monitoring that detect infrared wavelengths.
   • Gas Detection: Used in industrial gas detection systems operating in the infrared spectrum.
4. Scientific Research:
   • Spectroscopy: Used in spectroscopic applications requiring high transmittance across a broad range of wavelengths.
5. Medical Imaging:
   • Infrared Thermography: Applied in medical imaging systems such as IR thermography, which benefit from ZnS’s low absorption and scatter properties.

SHAPE Optics Zinc Sulfide (ZnS) Windows offer a robust solution for a wide range of optical applications, particularly those requiring low absorption and scatter across a broad wavelength range. Their enhanced durability and chemical resistance make them a superior choice compared to Zinc Selenide, especially in systems that incorporate both visible and infrared sensors.