Spectrum Sources LLC. is a leading supplier of high quality optical thin films specializing in linear and circular variable and stepped neutral density filters. Spectrum Optical Sources, Inc. has BK7 and UV Fused Silica substrates to coat an ND filter to your specification or choose one of the filters Spectrum Optical Sources, Inc. has in stock for next day shipping.

Spectrum Sources LLC also supplies a broad line of metallic mirror coatings such as gold, copper, titanium, chromium, aluminum and silver.
Our thin-film coating manufacturing facility allows large batch processing (with low defect capabilities) creating production costing that is very competitive for OEM accounts.
  1. LENSES
  2. MIRRORS
  3. WINDOWS
Circular ND Step Filter

Choose between 50mm / 100mm diameter substrates

 

  6 Step Filter   8 Step Filter   12 Step Filter

 

Part # Density Values at 550nm w/ data Price
CNDS-6-A 0.04 / 0.2 / 0.4 / 0.6 / 0.8 / 1.0 $ 625.00
CNDS-6-B 0.04 / 0.4 / 0.8 / 1.2 / 1.6 / 2.0 $ 625.00
CNDS-8-A 0.04 / 0.1 / 0.2 / 0.3 / 0.4 / 0.5 / 0.6 / 1.0 $ 625.00
CNDS-8-B 0.04 / 0.2 / 0.4 / 0.6 / 0.8 / 1.0 / 2.0 / 3.0 $ 625.00
CNDS-12-A 0.04 / 0.1 / 0.2 / 0.3 / 0.4 / 0.5 / 0.6 / 0.7 / 0.8 / 1.0 / 2.0 / 3.0 $ 725.00
 

Circular ND Post Mount Assembly

 

Part # Price
#CND-PMA* (includes 2" post holder with thumbscrew and 1/2" Dia. x 2" length post**) $ 100.00
 

*   Filter not included

**  Additional size post holders/posts available

 

Linear ND Step Filter

 

6 Steps Filter   11 Steps Filter

 

Part # Density Value at 550nm w / data Price
LNDS-10-A 0.4 / 0.3 / 0.6 / 0.8 / 1.0 / 2.0 $ 350.00
LNDS-10-B 0.4 / 0.1 / 0.2 / 0.3 / 0.4 / 0.5 / 0.8 / 1.0 / 2.0 / 3.0 / 4.0 $ 415.00
LNDS-25-C 0.4 / 0.3 / 0.6 / 0.8 / 1.0 / 2.0 $ 360.00
LNDS-25-D 0.4 / 0.1 / 0.2 / 0.3 / 0.4 / 0.5 / 0.8 / 1.0 / 2.0 / 3.0 / 4.0 $ 425.00
 
  Size of: 10mm x 50mm [-A] 4.5mm clear w / 9mm steps
[-B] 4.5mm steps

25mm x 100mm [-C] 9mm clear w / 18mm steps
[-D] 9mm steps
Variable Circular ND Filter

 

  Variable Circular Neutral Density Filter  

 

Part # Density Value at 550nm w / data Price
VCNDF-25-2 2.0 $ 150.00
VCNDF-50-2 2.0 $ 150.00
VCNDF-100-2 2.0 $ 150.00
VCNDF-25-4 4.0 $ 200.00
VCNDF-50-4 4.0 $ 200.00
VCNDF-100-4 4.0 $ 200.00
 
   

Circular ND Post Mount Assembly

 

Part # Price
#CND-PMA* (includes 2" post holder with thumbscrew and 1/2" Dia. x 2" length post**) $ 100.00
 

*   Filter not included

**  Additional size post holders/posts available

 

ND Filter

 

  ND Filters

 

Variable Linear ND Filter

 

  Variable Linear ND Filter  

 

Part # Density Value at 550nm w / data Price
VLNDF-50B-2 2.0 $ 90.00
VLNDF-50B-4 4.0 $ 90.00
VLNDF-100B-2 2.0 $ 90.00
VLNDF-100B-4 4.0 $ 90.00
VLNDF-50FS-2 2.0 $ 110.00
VLNDF-50FS-4 4.0 $ 110.00
VLNDF-100FS-2 2.0 $ 110.00
VLNDF-100FS-4 4.0 $ 110.00
 
B = BK7
FS = UV Fused Silica
   


Absorbtion ND Filters

 

  Absorbtion ND Filters  
Mirrors

 

  Aluminum Mirror   Silver Mirror   Gold Mirror
Windows

 

  High Precision
BK7 & Fused Silica Windows
  CAF2 Windows   Sspphire Windows
BK7 & UV FUSED SILICA Substrate Specifications  
 
  Circular Window Substrates   Linear Window Substrates   Fixed ND Substrates