| Ge | |
| Model | Product Name+ | Price | Buy Now |
| W-Ge-25.4-3 | Ge window, ø 25.4 mm x 3 mm | $110.00 |
 |
| W-Ge-38.1-4 | Ge window, ø 38.1 mm x 4 mm | $250.00 |
|
Germanium (Ge)
OpticsLand™ manufactures precision Germanium optical
components, which are widely used for infrared applications. Its useful transmission range
is from 1.8m m to 17m m. Due to wide
transmission range and opaque in visible Ge is well suited for manufacturing of optical
components for IR applications in lasers and optical systems. Its high index of refraction
(greater than 4) makes it of particular interest for lens design.
Germanium absorption increases with temperature. At 2000C it becomes non - transmissive.
Germanium components are used with AR coatings because of high surface reflectivity of
substrate.
Physical Properties
| Crystal type | cubic |
| Lattice constant | a=5.657Å |
| Density | 5.33g/cm3 |
| Melting point | 937°C |
| Refractive index | n=4.0034 @ 10.6 mm |
| Transmission band | 1.8 - 17 mm |
General Specifications of Germanium Optical Components
| Material | optical quality Ge Dn/cm < 0.5*10-5 |
| Surface Quality | 60-40 scratch & dig |
| Clear aperture | 80% of diameter |
| Diameter tolerance | +0.0, -0.1 mm |
| Thickness tolerance | +1.0, -0.1 mm |
| Flatness | <1.5 l per inch @ 633 nm |
Ge Windows |
|||
Diameter, mm |
Thickness, mm |
Coating |
Cat.-No |
| 25.4 | 3.0 | AR/AR @ 10.6 mm |
40801 |
| 38.1 | 4.0 | 40802 | |
| 50.8 | 5.0 | 40803 | |
| 25.4 | 3.0 | uncoated | 40811 |
| 38.1 | 4.0 | 40812 | |
| 50.8 | 5.0 | 40813 | |
Online store:
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Germanium lenses, Brewster windows, mirrors and beamsplitters are available on request.
Optics from A to Z
Axicons (doc
- pdf)
buy online - BaF2 optics
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buy online - LiF optics
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buy online - Ge optics -
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Hollow Beam Atom Tunnel by Yonho Song
Long, Narrow
All-light Atom Guide
High-resolution Optical Coherence Tomography Over a Large Depth Range with an
Axicon Lens by Zhihua
Ding et al.
A Ring-shaped
Laser Trap Based on Axicons by Bing Shao
Dynamically Adjustable Annular Laser Trapping for Sperm Chemotaxis Study by
Bing Shao et al.
Imaging
Properties of Axicon in a Scanning Optical System
(Axicon based)
Resonators Supporting Bessel Beams
Optical
Micromanipulation Using a Bessel Light Beam
Simultaneous
Micromanipulation in Multiple Planes Using a Self-reconstructing Light Beam
Optical
Dipole Traps and Atomic Waveguides Based on Bessel Light Beams
Parameter
Optimization for Vacuum Laser Acceleration at ATF/BNL
Photorefractive Keratectomy for Hyperopia Using an Erodible Disc and Axicon
Lens: 2-Years results
Adaptive optics (deformable mirrors) -
Wavefront
sensors
Diffractive Variable Attenuator (DVA)
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Diffractive
Variable Attenuator Housing -
DVA picture
BTO Crystals
BBO crystals -
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LiNbO3 wafers -
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more details
Stoichiometric LiNbO3 wafers -
Rutile coupling
prisms - brochure
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| Del Mar Ventures 4119 Twilight Ridge San Diego, CA 92130 tel: (858) 876-3133 fax: (858) 630-2376 optics@sciner.com http://www.sciner.com/Opticsland/ |
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