Optolong professionally manufacture optical thin film coating filters since 1999
Manufacturing Capabilities
Customize thin film coating
- Design coating: Based on clients’ requirements/applications;
- Processing waveband: Ultraviolet, Visible, Infrared, Near infrared ;
- Processing capability: Vacuum ion assisted coating (IAD), Hard coating;
- Coating types: Bandpass filters, Longpass filters, Shortpass filters, Anti-reflection filters, Beamsplitter, Dichroic mirrors;
- Main optical filters series:Astronomy filters , Fluorescence filters.
Coating technology
- Double-sided polishment substrate, good flatness and parallelism to avoid to halo/ghost image
- E-Beam gun
- Ion assisted coating, firm coating film, no wavelength shift
- Planet wheel coating fixture, wavelength consistency

Dust-free coating workshop & equipment

Optical coating is the key part of finished optical components. There are very strict requirements on environment when coating. Optolong owns class 10000 dust-free workshops. All optical filters are meticulously cleaned, coated and inspected in clean rooms.
- Coating equipment
- OPTORUN OTFC-1300
- Mars I 120
Quality Control
Optolong employs advanced spectrophotometers, measuring spectral range 190-3200nm. We perform spectral measurement of every production lot to ensure filters meet specification requirements.
- Spectrum measurement
- Shimadzu spectrophotometer
- PHOTON RT spectrophotometer
- Laser plane interferometer
- Collimator
- Goniometer

Get in touch
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Reflective Mirror (340-800nm)
Filter Type : Reflective Mirror
Wavelength: 340-800nm …
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Reflective Mirror 420-680nm
Filter Type : Reflective Mirror
Wavelength: 420-680nm …
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