Product type: Flat Lens. Application: Lighting, Medical, Optical, Photography. Model: Germanium Glass.
Overview
Germanium Glass Window Filter for Laser Lenses: an optical filter made from Optical Glass. Listed geometry: single-lens shape. Optical / electrical data: transmittance >95%. Coating: HC. Listed for Lighting, Medical, Optical and Photography applications. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.
Specifications
| Material | Optical Glass |
|---|---|
| Type | Flat Lens |
| Shape | Single-lens |
| Transmittance | >95% |
| Coating | HC |
| Usage | Lighting, Medical, Optical, Photography |
| Model NO. | Germanium Glass |
| Color | Blue |
| Product Name | Optical Filters |
| Atomic Coefficients | 32 |
| Melting Point | 937°c |
| Density | 5.33G/Cm |
| Rate of Thermal Expansion | 6.1*10-6 |
| Young's Modulus (Gpa) | 103 |
| Static Bending Strength (MPa) | Y≥75 |
| Infrared band | covers 2–16 μm (mid-far infrared), especially excellent performance in the 8–12 μm atmospheric window. |
| Opaque to visible light | completely absorbs visible light (0.4–1.8 μm), with a gray-black metallic luster. |
| Refractive index | high refractive index (~4.0), anti-reflection coating (such as ZnS, MgF) is required to reduce reflection loss. |
| Thermal imaging systems | infrared lenses and windows (military night vision devices, security monitoring thermal imagers). |
| Laser optics | Lenses and reflectors for CO lasers (10.6 μm). |
| Aerospace and remote sensing | optical components for satellite infrared sensors and onboard spectrometers. |
| Fiber optic communications | end couplers for mid-infrared optical fibers (such as chalcogenide glass fibers). |
| Supplier | Lumistar Special Glass Technology Co., Ltd. |
Technical data
| Element symbols | GE |
|---|---|
| Atomic coefficients | 32 |
| Melting point (°C) | 1520 |
| Knoop hardness kg/mm | 112 |
| Young's modulus GPa | 103 |
| Static bending strength (MPa) | ≥75 |
| Poisson's ratio | 0.28 |
What to specify when you request a quote
- Spectral target — listed as “>95%”; state the centre or edge wavelength, the bandwidth and the minimum transmission in the passband.
- Blocking — give the blocking range and optical density (OD) the system needs.
- Angle of incidence — interference filters shift with angle, so specify the operating angle and cone.
- Size and thickness — give outline, thickness and tolerance, and whether the filter is mounted.
- Substrate — listed as “Optical Glass”; name the substrate glass if thermal or UV behaviour matters.
- Surface quality — quote scratch-dig for imaging paths.
Engineering guides for this part
For material grades and coating options, see Color Filter Glass Materials for High-Performance Optical Screening and Imaging. How parts like this are machined and finished is covered in Chalcogenide Glass Coating for IR Optical Components. For an application example, read Infrared Window Glass for Smart Home Appliance Sensors. Before sending a drawing, check Specifying Coatings for Custom Glass Windows and Substrates. A related standard product is Optical Glass Colour Filter.
