CALL US
+86 591 2837 9366 +86 591 2837 9336
CONTACT US
sales@tempotec.com
Filters

Neutral density (ND) Filter

Neutral density (ND) filters are used to attenuate incident radiation without altering its spectral distribution. The neutral density value of an ND filter is related to the transmittance by:            
D=Log(1/T)             
Optical Density: D              
Transmittance: T                       


Absorption glass ND Filter     
Specifications:              

Material: Optical Neutral Density Glass            
Flatness: 2λ per 25 mm                        
Surface Quality: 80/50         
Parallelism: 3'            
Dimension: circle (dia.25.4mm typical) or square           
Dimension Tolerance: +/-0.2 mm         
Optical Density Tolerance : ± 5%           


Metallic Coated Neutral Density Filter             
Metallic coated ND filters are glass or quartz substrates with a precision metallic coating (Inconel) that provides uniform attenuation across a wide spectral range.           

Specifications:              
Material: BK7 glass and Fused Silica          
Flatness: 2λ per 25 mm           
Surface Quality: 80/50          
Parallelism: 3'    
Dimension Tolerance: +/-0.2 mm       
Coating: Vacuum-deposited metallic alloy          
Optical density Tolerance: +/- 5%              

Tempotec provide ND filter mounted or unmounted.              


Copyright © 2014 Tempotec Optics Co., Ltd. All rights reserved.      闽ICP备11010911号      Privacy Policy