Opitcal Neutral density glass filter,Opitcal ND filters,Neutral density (ND) filter

Specifications :   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 :

Materials	Optical Neutral Density Glass
Fltness	2l per 25 mm
Surface Quality	80/50
Parallelism	3'
Dimension	circle (dia.25.4mm typical) or square
Dimension Tolerance	+/-0.2mm
Optical Density Tolerance	±5% /10

        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.  

Materials	BK7 glass and Fused Silica
Fltness	2l per 25 mm
Surface Quality	80/50
Parallelism	3'
Dimension Tolerance	+/-0.2mm
Coating	Vacuum-deposited metallic alloy
Optical Density Tolerance	±5% /10

         Our factory   Inspection & Package   Exhibitions   Delivery   Our advantages 1.We are manufacturer,so our prices are much more competitive and the production can be fairly controlled . 2.We specialize in making costumer designed products for 10 years ,so your drawings ,products pictures and samples are warmly welcomed !And your special design will be well protected by us! 3.We can supply variety of optical materials :JGS1,K9,B270,7980.N-BK7 ,and different products: lens,prisms,windows,mirrors ,beam splitters ,filters ,wave plates. 4.Your inquiry will be reply within 12 hours .   FAQ Q1: Are you a factory or trading company ?  A: We are a factory.We have been in optics field for 10 years Q2: Where is your factory located ? How can i visit there ?  A:It is located in North-South 1st Road ,xiangguang Economic Development Zone,Yanggu county,Shandong Province,China Welcome to visit our factory anytime Q3: Can I customize the products based on my need? A: Yes, we can customize the material, specifications and optical coating for your optical components based on your needs. Q4: What's your MOQ? A:    <![if !supportLists]>(1) <![endif]> For inventory, the MOQ is 1pcs.
(2)  For customized products, the MOQ is 10pcs-20pcs. Q5: Can i get the sample to test before the mass production ?   Sure ,we would like to offer the sample for you to test our quality before large order   Q6: How to pay? A:   T/T, Paypal, Western Union, Secure payment, Credit card and Assurance payment on Alibaba and etc.. Q7: What's the delivery time? A:   For inventory: the delivery is 3 workdays after you place the order.
 For customized products: the delivery is 2 or 4 workweeks after you place the order. Q8: How to ensure the safety of payment? A:   Hengjing is the gold supplier of aibaba for more than 4 years and supports Alibaba Trade Assurance. We value our reputation in this field