Germanium Lenses use for 8-12μm thermal imaging

Germanium Lenses

Germanium (Ge) Lenses are available off-the-shelf with three anti-reflection coating options: 3 - 5μm for mid-infrared applications, 3 - 12μm for broadband multispectral applications, or 8 - 12μm for thermal imaging applications. Diamond-Like-Carbon (DLC) Coating is available in CRYSMIT.
Due to its high index of refraction (around 4.0 from 2 - 14μm), an anti-reflection coating is recommended on these germanium Lenses for sufficient transmission in the region of interest. Germanium is subject to thermal runaway, meaning that the transmission decreases as temperature increases. As such, these germanium Lenses should be used at temperatures below 100°C. The Knoop Hardness of germanium (780) is approximately twice that of magnesium fluoride, making it ideal for infrared applications requiring rugged optics.

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Plano-Convex Lens

Meniscus Lens

Specification

FAQS

Part NO.

Material

Construction

Diameter

Thickness

EFFL(10.6um)

Flatness

Coated

Delivery

Price

Add to CART

Part NO.	Material	Construction	Diameter	Thickness	EFFL(10.6um)	Flatness	Coated	Delivery	Price	Add to CART
Germanium Lenses P01	Ge	Plano-Convex	25 mm	3 mm	25 mm	λ/4	Uncoated	2 Weeks	$70
Germanium Lenses P02	Ge	Plano-Convex	25 mm	3 mm	25 mm	λ/4	AR/AR@(3000-5000)nm	2 Weeks	$70
Germanium Lenses P03	Ge	Plano-Convex	25 mm	3 mm	25 mm	λ/4	AR/AR@(3000-12000)nm	2 Weeks	$70
Germanium Lenses P04	Ge	Plano-Convex	25 mm	3 mm	25 mm	λ/4	AR/AR@(8000-12000)nm	2 Weeks	$70
Germanium Lenses P05	Ge	Plano-Convex	25 mm	3 mm	30 mm	λ/4	Uncoated	2 Weeks	$70
Germanium Lenses P06	Ge	Plano-Convex	25 mm	3 mm	30 mm	λ/4	AR/AR@(3000-5000)nm	2 Weeks	$70
Germanium Lenses P07	Ge	Plano-Convex	25 mm	3 mm	30 mm	λ/4	AR/AR@(3000-12000)nm	2 Weeks	$70
Germanium Lenses P08	Ge	Plano-Convex	25 mm	3 mm	30 mm	λ/4	AR/AR@(8000-12000)nm	2 Weeks	$70
Germanium Lenses P09	Ge	Plano-Convex	25 mm	3 mm	35 mm	λ/4	Uncoated	2 Weeks	$70
Germanium Lenses P10	Ge	Plano-Convex	25 mm	3 mm	35 mm	λ/4	AR/AR@(3000-5000)nm	2 Weeks	$70
Germanium Lenses P11	Ge	Plano-Convex	25 mm	3 mm	35 mm	λ/4	AR/AR@(3000-12000)nm	2 Weeks	$70
Germanium Lenses P12	Ge	Plano-Convex	25 mm	3 mm	35 mm	λ/4	AR/AR@(8000-12000)nm	2 Weeks	$70
Germanium Lenses P13	Ge	Plano-Convex	25 mm	3 mm	40 mm	λ/4	Uncoated	2 Weeks	$70
Germanium Lenses P14	Ge	Plano-Convex	25 mm	3 mm	40 mm	λ/4	AR/AR@(3000-5000)nm	2 Weeks	$70
Germanium Lenses P15	Ge	Plano-Convex	25 mm	3 mm	40 mm	λ/4	AR/AR@(3000-12000)nm	2 Weeks	$70
Germanium Lenses P16	Ge	Plano-Convex	25 mm	3 mm	40 mm	λ/4	AR/AR@(8000-12000)nm	2 Weeks	$70
Germanium Lenses P17	Ge	Plano-Convex	25 mm	3 mm	50 mm	λ/4	Uncoated	2 Weeks	$70
Germanium Lenses P18	Ge	Plano-Convex	25 mm	3 mm	50 mm	λ/4	AR/AR@(3000-5000)nm	2 Weeks	$70
Germanium Lenses P19	Ge	Plano-Convex	25 mm	3 mm	50 mm	λ/4	AR/AR@(3000-12000)nm	2 Weeks	$70
Germanium Lenses P20	Ge	Plano-Convex	25 mm	3 mm	50 mm	λ/4	AR/AR@(8000-12000)nm	2 Weeks	$70
Germanium Lenses P21	Ge	Plano-Convex	25 mm	3 mm	75 mm	λ/4	Uncoated	2 Weeks	$70
Germanium Lenses P22	Ge	Plano-Convex	25 mm	3 mm	75 mm	λ/4	AR/AR@(3000-5000)nm	2 Weeks	$70
Germanium Lenses P23	Ge	Plano-Convex	25 mm	3 mm	75 mm	λ/4	AR/AR@(3000-12000)nm	2 Weeks	$70
Germanium Lenses P24	Ge	Plano-Convex	25 mm	3 mm	75 mm	λ/4	AR/AR@(8000-12000)nm	2 Weeks	$70
Germanium Lenses P25	Ge	Plano-Convex	25 mm	3 mm	100 mm	λ/4	Uncoated	2 Weeks	$70
Germanium Lenses P26	Ge	Plano-Convex	25 mm	3 mm	100 mm	λ/4	AR/AR@(3000-5000)nm	2 Weeks	$70
Germanium Lenses P27	Ge	Plano-Convex	25 mm	3 mm	100 mm	λ/4	AR/AR@(3000-12000)nm	2 Weeks	$70
Germanium Lenses P28	Ge	Plano-Convex	25 mm	3 mm	100 mm	λ/4	AR/AR@(8000-12000)nm	2 Weeks	$70
Germanium Lenses P29	Ge	Plano-Convex	25 mm	3 mm	150 mm	λ/4	Uncoated	2 Weeks	$70
Germanium Lenses P30	Ge	Plano-Convex	25 mm	3 mm	150 mm	λ/4	AR/AR@(3000-5000)nm	2 Weeks	$70
Germanium Lenses P31	Ge	Plano-Convex	25 mm	3 mm	150 mm	λ/4	AR/AR@(3000-12000)nm	2 Weeks	$70
Germanium Lenses P32	Ge	Plano-Convex	25 mm	3 mm	150 mm	λ/4	AR/AR@(8000-12000)nm	2 Weeks	$70
Germanium Lenses P33	Ge	Plano-Convex	25 mm	3 mm	250 mm	λ/4	Uncoated	2 Weeks	$70
Germanium Lenses P34	Ge	Plano-Convex	25 mm	3 mm	250 mm	λ/4	AR/AR@(3000-5000)nm	2 Weeks	$70
Germanium Lenses P35	Ge	Plano-Convex	25 mm	3 mm	250 mm	λ/4	AR/AR@(3000-12000)nm	2 Weeks	$70
Germanium Lenses P36	Ge	Plano-Convex	25 mm	3 mm	250 mm	λ/4	AR/AR@(8000-12000)nm	2 Weeks	$70
Germanium Lenses P37	Ge	Plano-Convex	25 mm	5 mm	50 mm	λ/4	Uncoated	2 Weeks	$80
Germanium Lenses P38	Ge	Plano-Convex	25 mm	5 mm	50 mm	λ/4	AR/AR@(3000-5000)nm	2 Weeks	$80
Germanium Lenses P39	Ge	Plano-Convex	25 mm	5 mm	50 mm	λ/4	AR/AR@(3000-12000)nm	2 Weeks	$80
Germanium Lenses P40	Ge	Plano-Convex	25 mm	5 mm	50 mm	λ/4	AR/AR@(8000-12000)nm	2 Weeks	$80
Germanium Lenses P41	Ge	Plano-Convex	25 mm	4 mm	75 mm	λ/4	Uncoated	2 Weeks	$75
Germanium Lenses P42	Ge	Plano-Convex	25 mm	4 mm	75 mm	λ/4	AR/AR@(3000-5000)nm	2 Weeks	$75
Germanium Lenses P43	Ge	Plano-Convex	25 mm	4 mm	75 mm	λ/4	AR/AR@(3000-12000)nm	2 Weeks	$75
Germanium Lenses P44	Ge	Plano-Convex	25 mm	4 mm	75 mm	λ/4	AR/AR@(8000-12000)nm	2 Weeks	$75
Germanium Lenses P45	Ge	Plano-Convex	25 mm	4 mm	100 mm	λ/4	Uncoated	2 Weeks	$75
Germanium Lenses P46	Ge	Plano-Convex	25 mm	4 mm	100 mm	λ/4	AR/AR@(3000-5000)nm	2 Weeks	$75
Germanium Lenses P47	Ge	Plano-Convex	25 mm	4 mm	100 mm	λ/4	AR/AR@(3000-12000)nm	2 Weeks	$75
Germanium Lenses P48	Ge	Plano-Convex	25 mm	4 mm	100 mm	λ/4	AR/AR@(8000-12000)nm	2 Weeks	$75

Part NO.

Material

Construction

Diameter

Thickness

EFFL(10.6um)

Flatness

Coated

Delivery

Price

Add to CART

Part NO.	Material	Construction	Diameter	Thickness	EFFL(10.6um)	Flatness	Coated	Delivery	Price	Add to CART
Germanium Lenses M01	Ge	Meniscus Lens	25.0 mm	2.5 mm	25 mm	λ/4	Uncoated	2 Weeks	$90
Germanium Lenses M02	Ge	Meniscus Lens	25.0 mm	2.5 mm	25 mm	λ/4	AR/AR@(3000-5000nm)	2 Weeks	$90
Germanium Lenses M03	Ge	Meniscus Lens	25.0 mm	2.5 mm	25 mm	λ/4	AR/AR@(8000-12000nm)	2 Weeks	$90
Germanium Lenses M04	Ge	Meniscus Lens	25.0 mm	2.5 mm	30 mm	λ/4	Uncoated	2 Weeks	$90
Germanium Lenses M05	Ge	Meniscus Lens	25.0 mm	2.5 mm	30 mm	λ/4	AR/AR@(3000-5000nm)	2 Weeks	$90
Germanium Lenses M06	Ge	Meniscus Lens	25.0 mm	2.5 mm	30 mm	λ/4	AR/AR@(8000-12000nm)	2 Weeks	$90
Germanium Lenses M07	Ge	Meniscus Lens	25.0 mm	2.5 mm	35 mm	λ/4	Uncoated	2 Weeks	$90
Germanium Lenses M08	Ge	Meniscus Lens	25.0 mm	2.5 mm	35 mm	λ/4	AR/AR@(3000-5000nm)	2 Weeks	$90
Germanium Lenses M09	Ge	Meniscus Lens	25.0 mm	2.5 mm	35 mm	λ/4	AR/AR@(8000-12000nm)	2 Weeks	$90
Germanium Lenses M10	Ge	Meniscus Lens	50.0 mm	5.0 mm	50 mm	λ/4	Uncoated	2 Weeks	$150
Germanium Lenses M11	Ge	Meniscus Lens	50.0 mm	5.0 mm	50 mm	λ/4	AR/AR@(3000-5000nm)	2 Weeks	$150
Germanium Lenses M12	Ge	Meniscus Lens	50.0 mm	5.0 mm	50 mm	λ/4	AR/AR@(8000-12000nm)	2 Weeks	$150
Germanium Lenses M13	Ge	Meniscus Lens	50.0 mm	5.0 mm	75 mm	λ/4	Uncoated	2 Weeks	$150
Germanium Lenses M14	Ge	Meniscus Lens	50.0 mm	5.0 mm	75 mm	λ/4	AR/AR@(3000-5000nm)	2 Weeks	$150
Germanium Lenses M15	Ge	Meniscus Lens	50.0 mm	5.0 mm	75 mm	λ/4	AR/AR@(8000-12000nm)	2 Weeks	$150
Germanium Lenses M16	Ge	Meniscus Lens	50.0 mm	5.0 mm	100 mm	λ/4	Uncoated	2 Weeks	$150
Germanium Lenses M17	Ge	Meniscus Lens	50.0 mm	5.0 mm	100 mm	λ/4	AR/AR@(3000-5000nm)	2 Weeks	$150
Germanium Lenses M18	Ge	Meniscus Lens	50.0 mm	5.0 mm	100 mm	λ/4	AR/AR@(8000-12000nm)	2 Weeks	$150

Crystal Type	Cubic
Lattice Parameter	a=5.657Å
Transmission Band	2-12 um
Mohs Hardness	6.3
Density	5.33g/cm3
Melting Point	937 ℃
Refractive Index	4.0032 at 10.6um
Resistivity	5-40 ohm-cm
Young’s Modulus	103 GPa
Thermal Expansion	6.1 x10-6/℃
Thermal Conductivity	167mcal /cm/s/k

Attribute	Specification
Dimension Tolerance(mm)	+0/-0.1
Thickness Tolerance(mm)	±0.05
Flatness(@633mm)	λ/10
Surface Quality	20/10
Parallelism	30 arc sec
Perpendicularity	5 arc min

How to selecting the sutiable Materials for UV and IR Applications ?

Kindly view our: " 5 Steps to Selecting the sutiable Materials for UV and IR Applications " to providing you with strategies.

What is application of Germanium lenses ?

Thermal Imaging : Germanium lenses are extensively used in thermal imaging systems. They are transparent to long-wavelength infrared radiation, allowing them to focus IR light onto a sensor or detector. Thermal cameras and imaging systems rely on Germanium lenses to capture and focus thermal radiation emitted by objects.

Aerospace and Defense : Germanium lenses find extensive use in military and aerospace applications. They are employed in missile tracking systems, surveillance systems, target acquisition, and reconnaissance systems. Germanium's ability to transmit IR radiation and withstand harsh environmental conditions makes it an ideal choice for these applications.

Spectroscopy : Germanium lenses are used in spectrometers for infrared spectroscopy. They help to focus IR light onto a sample and collect the transmitted or reflected light for analysis. Germanium lenses enable the detection and characterization of chemical compounds based on their unique infrared absorption spectra.

Medical Imaging : Infrared imaging techniques, such as thermal imaging and near-infrared (NIR) imaging, are utilized in medical applications for diagnostics and monitoring. Germanium lenses play a crucial role in capturing and focusing the IR or NIR light in these imaging systems, allowing for non-invasive imaging of tissues and detection of abnormalities.

Environmental Monitoring : Germanium lenses are used in environmental monitoring systems to measure and analyze various parameters. For instance, they are employed in atmospheric monitoring to measure the concentration of gases, pollutants, or other substances based on their IR absorption characteristics.

Industrial and Scientific Research : Germanium lenses are used in a wide range of industrial and scientific research applications. They are employed in IR spectroscopy, thermal analysis, laser systems, and other analytical instruments. Germanium lenses enable the precise manipulation and analysis of IR radiation in these experimental setups.