Optics Calcium Fluoride (CaF2) Hemherical Lens

Key Features:

  1. High Numerical Apertures:
    • Optical Performance: These lenses feature high numerical apertures, making them ideal for applications requiring efficient light collection and focusing.
  2. Ideal for Fiber and LED Coupling:
    • Coupling Efficiency: Designed to facilitate coupling of visible and infrared light sources, including LEDs and optical fibers.
  3. Substrate Options:
    • Materials Available: Fused Silica, Silicon, Calcium Fluoride (CaF2), or Zinc Selenide (ZnSe)
    • Broad Coverage: Provides optical solutions for a wide range of wavelengths from ultraviolet (UV) to long-wave infrared (LWIR).




SHAPE Optics Hemispherical (Half-Ball) Infrared (IR) Lens Specifications

Parameter Specification
Diameter (mm):  ±0.01
Substrate: Calcium Fluoride (CaF2), IR Grade
Coating: Uncoated
Type: Half-Ball Lens
Wavelength Range (nm): 300 – 8000
Center Thickness CT (mm):  ±0.05
Index of Refraction n_d: 1.434
Model Number: CF-HS-2
Radius R (mm):
Surface Quality: 60-40

These specifications provide detailed information about the SHAPE Optics Hemispherical (Half-Ball) Infrared (IR) Lens with a Calcium Fluoride (CaF2) substrate. Designed for applications requiring high numerical apertures, these lenses are suitable for UV to IR light coupling, including LED and fiber coupling, microscopy, and IR laser measurement.

Product Description:

  1. Hemispherical Design:
    • Construction: Made by cutting a spherical (ball) lens in half, offering easier mounting and integration into optical systems compared to full spherical lenses.
  2. Applications:
    • Fiber Coupling: Ideal for coupling light into optical fibers.
    • Microscopy: Suitable for use in microscopy applications where high numerical apertures are beneficial.
    • IR Laser Measurement: Useful in infrared laser measurement systems requiring precise light focusing and collection.
  3. Substrate-Specific Options:
    • Fused Silica: Excellent for applications requiring UV to near-infrared (NIR) coverage.
    • Silicon: Suitable for mid-wave infrared (MWIR) applications, available as standard hemispherical or hyper-hemispherical lenses.
    • Calcium Fluoride (CaF2): Ideal for a broad range from UV to MWIR due to its high transparency and low absorption.
    • Zinc Selenide (ZnSe): Best for long-wave infrared (LWIR) applications; however, special care must be taken due to its toxicity.

Safety Note:

  • Handling Zinc Selenide (ZnSe):
    • Toxicity: ZnSe is a toxic material. Always wear rubber or plastic gloves when handling to avoid contamination and exposure.


SHAPE Optics Hemispherical (Half-Ball) Infrared (IR) Lenses provide high numerical apertures and are ideal for applications such as fiber and LED coupling, microscopy, and IR laser measurement. With a range of substrates available, including Fused Silica, Silicon, Calcium Fluoride, and Zinc Selenide, these lenses cover a wide spectrum from UV to LWIR. The hemispherical design simplifies mounting, making them a versatile choice for various optical systems. Special care should be taken when handling Zinc Selenide due to its toxicity.

Additional information

Weight 0.5 kg
Dimensions 12 × 10 × 8 cm


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