Оптический фильтр Optolong uhc 2

Optolong UHC (Ultra High Contrast) broadband filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.

Main Use and Performance

Suitable for color CCD cameras and unmodified DSLRs.

UHC with narrower passband provides higher contrast than CLS. Thus it is more suitable for urban environment where you suffer from severe light pollution.

UHC has a substantial red passband and offer superb views for objects like the Orion Nebula (M42).

Light pollution filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.

WARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.

² Schott substrate material

² Thickness 2.0 mm

² Surface Quality: 60/40 (Refer to MIL-O-13830)

² Fine-optically polished to ensure accurate 1/4 wavefront and < 30 seconds parallelism over the both surfaces.

² Infrared wavelength 700-1100nm cut-off

² Multi-layers anti-reflection coating

² Non-cementing optical substrate coating

² Electron-beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change. 

² Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.

Package details:

1.With the QC to check every astronomy filters before packing .
2.Every astronomy filter is put in PP plastic case.

   Package list:

   1X astronomy moon&Skyglow filter

   1X PP plastic case

   1X carton 

   1X packaging list
3.Strong paper carton package .
Compact packing for all thefilters without gaps ; which avoid the filter shaking heavily during shipment .

Delivery details:

Normally, we ship order within 2-3 days after payment received.
Order can be shipped by DHL , FedEx, UPS, TNT ,EMS , air , sea.
We have the discount account of these expresses , and clearly know their differences for the prices and shipping time , can offer you the best suggestion for the shipment according to your needs .

OUR ADVANTAGES

We have five precious vacuum coating machines which chamber from 700mm to 1300mm. And a set of spectrophotometer (UV-VIS-NIR Shimadzu UV3150) which is imported from Japan. And we have complete glass/lens cleaning, processing and inspection equipments, such as Ultrasonic Cleaners with 12 sinks, grinding/cutting machines. 

Q: How to order or how is the enquiry process?

A: There is two way to contact us. By mail and by phone.

Mail: please pending all the enquiries&orders to Ali online. Your requirement would be respond within 1 hour during 9:00am to 10:00 pm(Beijing time) at working day.

Phone: phone call is available from 9:00 am to 18:00 (Beijing time) from Monday to Saturday. Phone number : +86-0871-68317717. Fax to our sales using number + 86-087168317850.

Q: Do you accept the OEM service for different type of filters or different size?

A: Yes. Optical thin film coating design are awailiable for bandpass filter, fluorescence instrument filter, astronomy light pollution filter, anti reflection filter, bleam splitter and dichroic mirror. Please check the OEM service we could offer on OEM item.

Q: How long is the lead time?

A: Stock filter within 7 days. Normal OEM order within 15 days. Volumn production order about 20 days or according to the agreement between Optolong and client.

Q: Could Optolong support on prototype for sample offer?

A: There is no MOQ requirement for the prototype filters. We even could offer free samples according to the condition.

Q: There is some problem with the product design. Could you help us to resolve the problem?

A: With years of developing, we have much experience and own understanding of coating design according to different applications. There is much we could do for you.