Coating Reflectance Tester
Optical-lens film-thickness/reflectance inspection instrument. Douyin demo: https://www.douyin.com/user/self?modal_id=7363167072077057280 ; Bilibili: https://www.bilibili.com/video/BV1sH4y1V7CD/ . Reflectance measurement for lenses and curved lenses supports R&D/production of low-reflection optics, allowing more light to enter rather than reflect. Coatings reduce reflection. Typical lens reflectance must be below 1%, requiring high precision; ordinary reflectometers have about 3-5% error and struggle to achieve requested0.2-0.5%. Tn: Reflectance; Sample: Test-lens spectrum; Dark: Spectrometer electronic noise; Ref: Reference spectrum or 100% reflection spectrum, usually a lit white board.1. Our spectrometer provides0.1% accuracy, better than most competitors.2. A collimating probe must be strictly perpendicular; an angle between test light and sample causes errors.3. Curved optics require a sufficiently small spot for accurate local measurement.4. High-reflectance white and low-reflectance black boards aid testing.5. Software must accurately remove environmental and ambient-light effects.
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