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Silicon Lens
Silicon Lens
Silicon Lens
 
  
    Silicon Has Good transmission at 1-7um. It is widely used for 3-5um infrared windows and lens.

Optical Properties

 

Transmission Wavelength

1000nm—10000nm   30000nm—300000nm

Absorptivity  ,dn/dT (1/k)

1.6*10-4

Thermo-optical coeffecient  (1/cm)

1.6*10-3 @3000.nm

 

Refractive index range(20℃)

Wavelength(nm)

Refractive index(n)

Wavelength(nm)

Refractive index(n)

1357

3.4975

4000

3.4257

1367.3

3.4926

4258

3.4245

1395.1

3.4929

4500

3.4236

1529.5

3.4795

5000

3.4223

1660.6

3.4696

5500

3.4213

1709.2

3.4664

6000

3.4202

1813.2

3.4608

6500

3.4195

1970.2

3.4537

7000

3.4189

2152.6

3.4476

7500

3.4186

2325.4

3.443

8000

3.4184

2714.4

3.4358

8500

3.4182

3000

3.432

10000

3.4179

3303.3

3.4297

10500

3.4178

3500

3.4284

11040

3.4176

 Manufacture Specifications

 Diameter

 3mm to 280mm

 Diameter Tol.

 +/-0.1

 Surface Quality

 40-20 standard

 Surface Quality

 40/20

 Flatness 

 1/4 lambda

 Chamfer

 0.25mmx45degree

 Focal Length Tol.

 +/-1%

 Coating

 Customer design


  
 
 
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