Products

Germanium optics-Ge lens

Short Description:

Germanium lenses are optical lenses made of polished germanium. These lenses are rugged and resistant to corrosion, and are ideal for harsh environments and applications where there is constant exposure to the elements.


Production capability: 1000-3000pcs per month

Payment : Paypal, Western Union, T/T

Shipping method: Express, Airfreight, Ocean freight


We can provide

·Competitive Prices

·Quality ISO:9001-2015 Certified

·ROHS Compliant

·Short lead time

·Standard size stock available

·Fast Prototyping

·Custom Optics Fabrication

·Quality assurance

·Warranty & After sales service


Product Detail

Product Tags

Product Description

The single crystal of germanium used in semiconductor is less absorption in the infrared wavelength of 2 - 20μm and it can be used as an optical element of the infrared light. It is a single lens which was made with the germanium crystal. It is used as a lens of a camera to observe the infrared, such as thermography.

Even though it looks like the light does not transmit because of its metallic luster, it is transmitting through a wide infrared range of 2 - 20μm.The wavelength of 1.5μm or less does not transmit, so it also provides the effect of an infrared transmission filter.Since the silicon lens has a refractive index of 4 or more, the lens curvature is slower then when made from standard glass.

Germanium lens can have metallic luster, so that visible light is reflected and absorbed. Because of this, no transmittance occurs.Germanium lens without an anti-reflection coating has a loss due to surface reflection and results in transmittance of about 40%.For the observation of infrared wavelengths, it is necessary to consider the effect of the radiation spectrum by temperature. In case of using in an environment of 30℃ or more, radiant light of infrared (near 9.6μm) is emitted from all substances, and it will not be able to properly observe this infrared spectrum.

Feature

1. Spherical plano-concave, p-convex, concave-convex and aspheric lenses are all available

2. Available with AR or DLC coating

3. Available in a wide variety of diameters and focal lengths

4. High resistivity hemispherical lens available

Application

Due to their remarkable properties, germanium lenses are often used in camera lenses for infrared heat measurement,Ideal for Defense, Security, and Thermal Imaging Applications.

Product Parameter

Applicable to infrared imaging monitoringtelemetry and infrared spectroscopic optical system

Technical    Requirement

Commercial Grade

Precision Grade

High Precision

Size range

1-600mm

2-600mm

2-600mm

Diameter tolerance

土0.1mm

土0.025mm

土0.01mm

Thickness tolerance

土0.1mm

土0.025mm

土0.01mm

Parallelism

±3´

±1´

±30´´

Surface quality

60-40

40-20

20-10

Surface accuracy

1.0λ

λ/10

λ/20

Coating

3-5μm OR 8-12μm AR, <5% per Surface

Bevelling

0.1-0.5mm*45°

Substrate

Germanium or other optical crystal

Diameter

Focal length

Radius

Center thickness

Edges thickness

16.5

20

60

1.8

1

20/25.4

25.4 mm

76.3 mm

3.1 mm

2.0 mm

20/25.4

50 mm

150.3 mm

4.0 mm

3.5 mm

20/25.4

75 mm

225.5 mm

4.0 mm

3.6 mm

20/25.4

100 mm

300.7 mm

1.8 mm

1.5 mm

20/25.4

150 mm

451.0 mm

4.0 mm

3.8 mm

20/25.4

200 mm

601.4 mm

4.0 mm

3.9 mm

20/25.4

500 mm

1501.9 mm

2.1 mm

2.0 mm

20/25.4

750 mm

2252.9 mm

2.0 mm

2.0 mm

20/25.4

1000 mm

3303.9 mm

2.0 mm

2.0 mm


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