Spherical Germanium Lenses for Lwir 8-12um High Transmittance

• Customization: Available
• Usage: Medical, Optical, Photography
• Type: Flat Lens
• Model NO.: yt9017
• Transmittance: >95%
• Shape: Single-lens
• Material: Optical Glass
• Lenses Color: Clear
• Certification: RoHS
• Customized: Customized
• Coating: HMC
• Polished: Yes
• Surface Quality: 60-40
• Flatness: L/2
• Centration: 1 Arc Min
• Dimention: 10-450mm
• Dimention Tol: 0.1mm
• Transport Package: Box
• Specification: 12.7mm
• Trademark: Yutai
• Origin: Changchun
• HS Code: 9001909090
• Production Capacity: 40000/Year
• Package Size: 20.00cm * 20.00cm * 20.00cm
• Package Gross Weight: 1.000kg

Product Description

Spherical Germanium Lenses for LWIR
In the 2-12 μm range, germanium is the most commonly used material for making optical lenses and optical windows in high-efficiency infrared imaging systems. Due to its wide transmission range and visible light opacity, germanium is well suited for making optical components for infrared lasers and optical systems. Germanium's high refractive index and minimal surface curvature make it an ideal material for making low-power imaging systems. The small chromatic aberration often eliminates the need for calibration. Absorption of germanium increases with temperature. The apparent transmission degradation of germanium materials begins at about 100 °C and accelerates between 200 °C and 300 °C, which can lead to catastrophic failure of the fibre. Due to the high substrate surface reflectivity, germanium elements are AR coated.

Do you know the value of the refractive index of germanium materials?
 

Nd data for different wavelength
μm	Nd	μm	Nd	μm	Nd
2.058	4.102	2.153	4.0919	2.313	4.0786
2.437	4.0708	2.577	4.0609	2.714	4.0562
2.998	4.0452	3.303	4.0369	4.258	4.0216
4.866	4.017	6.238	4.0094	8.66	4.0043
9.720	4.0034	11.04	4.0026	12	4.0023
13.02	4.0021

If you are interested in our products, please feel free to !

It is also available to supply the coating wavelength curve, such as AR coating,BBR coating,filter coating and so on.


Changchun Yutai Optics Co.,Ltd. is a manufacturer with ISO9001 certification. We are specialized in high-performance optical components
include lens, mirrors, filters, windows and prisms which are specified by customers. Yutai's items are widely used in imaging, defense, medical,
laser and industry market. As a fast-growing supplier in Optics, Yutai Optics has quickly established itself as a leader in optical components with advanced technology and quality control ability as Yutai aims to provide professional service and good quality items to meet customers' request.
Yutai already established long-term relation with many powerful companies all over the world.

• Q: What are your main products?
• A: Optical lens,mirrors,windows,filters,prisms
•  
• Q: How long is your delivery time?
• A: In general delivery time is about one month for custom produced optics.except stock ones or some special optics.
•  
• Q: Do you provide samples ? is it free or extra ?
• A: We can provide free samples if we have stock optics as your request,while custom produced samples are not free.
•  
• Q:What is your MOQ ?
• MOQ is 10pcs for most of the optics, while MOQ could be only one piece if you need a element in big dimention.
•  
• Q: What is your terms of payment ?
• T/T,L/C,VISA,Paypal,Alipay or Negotiation.