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