Optical Glass Coated Infrared Ge Germanium Lens

Product Description

Ge has high refractive index, The transmission wavelength for Monocrystal Germanium is 2-12um, it is a common infrared crystal which is widely used for infrared image system and infrared spectrograph systems. Ge has a small absorbency at 10.6um. It is a good material for CO2 lens and windows.
Optical Properties

Transmission Wavelength	2000nm-12000nm
Absorptivity (1/cm)	1.3*10-3 @ 3800nm 3*10-2 @ 10600nm
Thermo-optical coeffecient, dn/dT (1/k)	4.08*10-4 @10600nm
Electrical resistivity	5-40 Ω.cm 1-5Ω.cm >50Ω.cm

Refractive index range(20ºC)

Wavelength(nm)	Refractive index(n)	Wavelength(nm)	Refractive index(n)
2200	4.0879	8000	4.0057
3000	4.0451	9000	4.0040
3800	4.0267	10600	4.0028
5000	4.0160	11000	4.0025
6000	4.0107	12000	4.0021
7000	4.0079	13000	4.0018

Manufacture Specifications

Diameter	2-450mm
Diameter Tol.	+/-0.1
Surface Quality	60-40 standard
Flatness	1/4 lambda
Chamfer	0.25mmx45degree
Focal Length Tol.	+/-1%
Coating	2-14um

Our Factory
Testing
Exhibition Show
Sunday Optics attended Laser World in Laser World in Munich,Frankfult Exhibition,SPIE every year.
Related Production Line
sunday optics also manufacture high precison Lens,prism, powell lens, collimator lens, glass filter, and mirror.
FAQ:
1. Are you manufacturure? can we see your factory?
Yes.
2. Do you have test report?
Yes, we offer full size test report, about size, focal length, flatness, coating curve, coating plate.
3.What is your production quantity everymonth?
It depands on the lens size and precison.
4.What is the Minimum quantity?
1pc
5.What is your delivery time?
samples: 10-20days
6.How should we do if the quality is not good?
Repair or return money.