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Infrared Windows

The infrared window is processed through fine grinding, grinding, measuring, ultra-high-precision polishing and other processes. Under precise control of the machine tool and processing environment, ultra-high-precision correction polishing technology is used to polish the window surface to achieve an optical plane. Infrared windows with shape accuracy ≤ 0.1 micron and surface roughness Ra ≤ 0.01 micron.

infrared windows
ir windows

Specifications of Infrared Windows


Infrared window product parameter table
projectIndicator requirements
1. MaterialSapphire, infrared fused quartz, single crystal germanium, single crystal silicon, zinc selenide, zinc sulfide, gallium selenide and other infrared materials
2. DiameterOD≤300mm OD±0.025 or according to customer requirements
3. Center thicknessT=0.1~50mm±0.01 or according to customer requirements
4. Effective focal lengthaccording to customers needs
5. Working distanceaccording to customers needs
6. Effective apertureED>80% aspheric area
7. CoatingAR or DLC coating R<0.5% @λnm
8. Surface shapeUltra-high precision Rt≤0.1μm, high precision Rt≤0.5μm, precision Rt≤1μm
9. Surface quality60-40, 40-20, 20-10, 10-5


Features of Infrared Windows

Features of Infrared Windows
  • One-stop customized production: Solar Valley processes various circular, D-shaped, square, trapezoidal and other structural infrared windows according to customer requirements. It can provide windows in different size ranges and materials. The base materials include Various sapphire, infrared fused quartz, calcium fluoride (CaF2), magnesium fluoride (MgF2), zinc selenide (ZnSe), germanium (Ge), silicon (Si) and other crystal materials, and provide anti-reflection coating, high reflection Film, spectroscopic film, metal film and other optical coatings, broadband anti-reflection coating can be used in ultraviolet, visible, near-infrared and mid-infrared bands.

  • Material: Infrared materials such as sapphire, infrared fused quartz, single crystal germanium, single crystal silicon, zinc selenide, zinc sulfide, gallium selenide, etc. are commonly used materials for producing efficient infrared windows in imaging systems.

  • Infrared window characteristics: strong resistance to mechanical impact and thermal shock, high surface hardness, good transmittance in the ultraviolet, visible and infrared fields, suitable for use in harsh environments. It can be made very thin, suitable for visible light, and suitable for near, mid, and far infrared spectrum. It is usually used as a protective window for electronic sensors or detectors of the external environment. It is used to separate the environment on both sides so that the inside and outside of the instrument can interact with each other. isolation to protect internal components. Used in laser, infrared optics, ultraviolet optics and detectors and other scientific and technological fields

    Product indicator description:

    1. Maximum dimensions of circular infrared window: OD≤φ300mm, thickness 0.1~50mm

    2. Maximum dimensions of square infrared window: L×W ≤300×300mm

    3. Infrared windows can reach the following accuracy levels according to customer requirements:

    Ultra-high precision grade: surface error <0.1μm, surface roughness <0.01μm

    High precision grade: Surface error <0.5μm, surface roughness <0.05μm Precision grade: Surface error <1μm, surface roughness <0.1μm


  • Surface defect grade: 60-40, 40-20, 20-10, 10-5. Produced according to customer requirements.

  • Coating: Coating according to customer requirements.

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