Changzhou Defoe Long Optronic Technology Co., Ltd.

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Changzhou Aofa Photoelectrical Instrument Factory is a research and development-oriented manufacturer and trading company based in Changzhou, China. Established with a workforce of 51 to 100 employees, the company operates its own factory and specializes in the production of precision instruments, including various specifications of compasses, ball guides, and optical telescopes. Their diverse product range features military-grade, tourism, and tape-ball type compasses, as well as specialized items like the DC45 and G51 models. As a contract manufacturer, the company holds two national-level patents for independent research and development. Changzhou Aofa Photoelectrical Instrument Factory maintains long-term strategic partnerships with international and domestic automobile manufacturers, advertising agencies, and outdoor equipment suppliers. Committed to the principles of quality and honesty, the enterprise serves global markets across the sporting goods, recreation, and arts and crafts sectors.
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Diffractive Optics Ltd is a manufacturer of precision optical systems and components, based in Zhongshan, China, with an office in Hong Kong. Established with over 15 years of experience in precision lens design and manufacturing, the company operates with 51 to 100 employees and is recognized as a 'New Hi-tech Enterprise'. They specialize in advanced optical technologies including Diffractive Optical Element (DOE) fabrication, Aspheric Optics, and Micro-feature Optics. Their product portfolio encompasses optical lenses, camera lenses, plastic reflectors, projector optics engines, LED lighting components, zoom lenses, and endoscope lenses. Diffractive Optics Ltd offers comprehensive services from conceptual design through prototyping to mass production, utilizing capabilities such as injection-compression molding, metal optics by precision electroforming, dielectric anti-reflection optical coatings, and single point diamond turning. They serve a broad spectrum of industries, providing optical solutions for digital imaging, microdisplay projection, head-up display systems, PIR motion detection, and laser optical modules. The company actively participates in industry exhibitions, demonstrating their engagement in the optics and lighting sectors.
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