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AboutShijiazhuang Zeyuan Optics Co., Ltd. was founded in 1989. We are professional manufacturer integrating colored glass melting and optical filters producing.
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ProductsOur main products include heat absorbing filters, neodymium filter glass, rising color temperature glass, IR optical glass, UV pass optical filter glass, colored optical filters, neutral density filters, bandpass filters...
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BlogsOver the past thirty years since its establishment, our company has always adhered to the entrepreneurial spirit of proactive, innovative, perseverance to provide high-quality products and perfect services to many customers in domestic and abroad.
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ContactShijiazhuang Zeyuan Optics Co., Ltd. was founded in 1989. We are professional manufacturer integrating colored glass melting and optical filters producing.
How do spots or streaks in the UV Longpass Filters come about
UV Longpass Filters speckle or speckle definition and description: Viewed from the non-coated surface, there are irregular color speckle or speckle surface defects on the coated UV Longpass Filters. Generally, there are mildew, paper grain, suction cup printing, tin dipping and watermark on the original film.
Causes: There are many spots or streaks, which are mainly caused by defects in the original film before coating, or due to improper storage and use after coating.
1. Filter production:
Generally speaking, the coating filter production process itself will not produce these defects, mainly in the quality of the original film. For example, mildew and paper pattern prints that are not fresh in the original film; suction cup bows and tin dipping brought by the original film; watermarks caused by poor cleaning of tempered or semi-tempered filters; and the original film itself has been contaminated, These can cause speckle or mottled defects in coated filter products.
2. UV Longpass Filters storage and installation:
Since the filter is placed in a humid and unventilated environment for a long time, or exposed to the sun and rain outdoors, the filter may also be moldy or deteriorated, resulting in spots or streaks.
3. UV Longpass Filters film pollution:
Due to improper installation and cleaning, it is also possible to cause local contamination of the filter, resulting in spots or streaks on the filter. In addition, because the UV Longpass Filters is not cleaned in time, dust and oil fume and other swag will adhere to the surface of the filter for a long time, and eventually spot or streak-like pollution will appear because it cannot be cleaned.
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Tel/WhatsApp: +86-13722872933
Email: zyoptics@zygx.cn
Add: Xiqiaotou Industrial Area, Shenze County, Shijiazhuang, Hebei, China
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