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About us

Kunming Yulong Photoelectric Technology Co., Ltd. is located in Kunming, Yunnan Province, one of the four optical bases in Chinese history, founded in 1999. After 18 years of development, Yulong has formed a product line mainly composed of astronomical filter, fluorescent filter and band-pass filter, supplemented by uvmirror, ultraviolet / infrared filter, spectroscope, dichroic mirror, reflector, window protector and other optical filters. At present, it has nearly 60 employees and the plant area is more than 2000 ㎡.

Over the past 18 years, Yulong has been working hard, adhering to the concept of small and beautiful, and constantly doing deep and fine work in the filter industry. With high quality products, reasonable price and timely delivery, we can create more value for you and become your reliable optical filter partner!

Brand introduction

Optolong is our trademark. We not only have our own brand products & mdash; astronomical filter and fluorescent filter, but also provide the overall solution of filter design, customized processing, proofing and mass production.

Technological strength

Yulong has a group of high-quality senior scientific research and technical personnel with rich practical experience and skilled optical workers. It has the ability to design and research all kinds of optical films by itself. It can develop and batch produce high-difficulty optical filters according to the requirements of customers. Our optical filters are durable and have passed ISO9001, ROHS, SGS, CTI and other certifications. They are widely used in machine vision, medical field, life science, industrial detection, laser optoelectronics and other fields.

Globalization strategy

Yulong is the first filter manufacturer with its own astronomical brand in China. To date, optolong & reg; astronomical filters have distributors in more than 30 countries around the world, with customers all over the world. Our astronomical filter was published in Astronomy Magazine. The product L-Pro is affectionately called "wife filter" by the majority of astronomy fans. Other products, such as UHC, H-Beta, o-iii, H-alpha, SII, lrgb, night sky H-alpha, are deeply loved by professional photographers and astronomy fans.