Optolong Optics Co.,ltd is the brand owner of optolong who is a manufacturer of astronomy filters, fluorescence filters. We also offer other interference filters like UV filters, visible filters and Near inferred filters, beam splitter, anti-reflection coating and optical mirrors as a OEM service.

Located in Kunming city in China which is one of the four optics center and the coating experience of 18 years (since 1999) enable us to design and produce the filters with most sophisticated spectrum.

We are glad to declare that Optolong has been become the first and only non-replaceable brand for astronomical filters in China. Optolong brand is also known as the comparable filters with international brand by distributor client around the world.

Five bands bandpass filter L-Pro has gotten the most positive feedback from astronomy photographer, astronomy amateur. We also manufacture others filters like UHC, H-Beta, O-III, H-Alpha, SII, LRGB, Night Sky H-Alpha are also the. Check more info on the astronomy filters page.

Fluorescence filters like FISH products, single band filters DAPI, FITC, TRITC, Texas Red, GFP, CFP, Cy5 is the other direction of Optolong. Filters we produce are with the dark background and bight signal which is becoming the essential tool for fluorescence instrument manufacturer, university and study institution. We are the first manufacturer who launch fluorescence filters set for FISH products which require more accurater control on the spectrum and overlap in China. Check more product info on the fluorescence FISH filters set.

Optolong is also specialized in the manufacturing high volume optical filters for application like machine vision, analytical instrument, life science, industry detection and lasers. With the hard thin film coating machine, experienced filters design technician, experienced coater operator, stable control, durable property, lot to lot consistency, Optolong has been become the supplier choice of many international instrument manufacturer.

From prototype to high volum production, Offering thousands of most complex spectrum complex for clients all over the world, Optolong has been insisting the Company philosophy that not big as elephant, but small and flexible like hummingbird. We always pursue supreme quality and client satisfactory.