61-6949-03 Germanium Single Lens Focal Length 25mm SLGE-25-25P
Analyzer, Testing Equipment

61-6949-03 Germanium Single Lens Focal Length 25mm SLGE-25-25P

model: 61-6949-03
brand: SIGMAKOKI CO., LTD.

Product Description

Product Model: 61-6949-03Product Brand: SIGMAKOKI CO., […]

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Product Details

Product Model: 61-6949-03
Product Brand: SIGMAKOKI CO., LTD.

Features

  • Single crystals of germanium ***d in semiconductors have an infrared wavelength of 2~20 μm and low absorption, so they can be ***d as optical elements for infrared light.
  • It is a single lens made of this germanium crystal.
  • Used as a lens for cameras that observe infrared radiation, such as thermography.
  • It looks metallic and does not transmit light, but it transmits in the wide infrared range of 2~20 μm.
  • Wavelengths below 1.5 μm are not transmitted, so the effect of an infrared transmission filter is also obtained.
  • Since the refractive index is more than 4, the curvature is gentler than that of a glass lens.
  • Germanium is completely harmless to the human body, so it is safe to ***.
  • * The germanium lens has a metallic luster, and visible light is not reflected or absorbed and transmitted.
  • * The transmittance of a germanium lens without an antireflection coating is about 42% due to surface reflection loss.
  • * For infrared wavelength observation, it is necessary to consider the effect of radiation spectrum due to temperature.
  • * When using in an environment above 30°C, infrared radiation (around 9.6 μm) is emitted from all materials, and the infrared spectrum of the object to be observed cannot be correctly observed.

Spec

  • [

    common specification]
  • Material: Germanium (Ge)
  • Design wavelength: 10.6μm
  • Coating: No coat
  • Surface reflective rate: 36% (wavelength 5μm)
  • Shape: Spherical surface flat convex, double-side polishing surface
  • Eccentricity: <3′
  • Effective diameter: 90% of the outer diameter
  • Scratch - dig: 60-40
  • [Individual specification]
  • Focus distance f: 25mm
  • Back focus fb: 24.25mm
  • Edge thickness te: 1.95mm
  • RoHS conform product

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