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Lambda 950 for biosensor - mobile phone IR hole transmission test
The mobile phone IR hole is actually a distance sensor that uses the infrared ( IR ) of the sensing organism to sense the distance. When we pick up the phone and pick it up at the ear, the phone screen will automatically black out at this time, to avoid randomly dialing the phone or launching an application. When the phone leaves the ear, the phone screen will automatically light up again, and the phone can be operated normally. This is mainly achieved by sensing the infrared rays emitted by the human body. This requires the IR hole of the mobile phone to pass through the infrared rays, while not transmitting ultraviolet rays and visible light, and controlling the brightness of the screen through changes in light. In the production process of the mobile phone IR hole, it is necessary to test the transmittance of the IR hole at different wavelengths for quality control. Several test wavelength positions of 550 nm , 850 nm and 940 nm are generally selected . European and American standards generally test the transmittance of two wavelengths of 550nm and 850nm , while the Japanese and Korean standards generally use the transmittance of two wavelengths of 550nm and 940nm . The general quality control requires that the light transmittance of the mobile phone IR hole at 850nm is more than 80% , and the transmittance at 550nm is less than 15% , so that the IR hole of the mobile phone can feel the change of infrared rays, and is not interfered by visible light. PerkinElmer Lambda series spectrophotometer is equipped with 150mm integrating sphere detector, which has the advantages of accurate test and simple operation. The integrating sphere detector is coated with Teflon material, with high reflectivity, low light energy loss, high test accuracy and high stability. Teflon coating has good chemical stability, long-term non-aging, and is not afraid of acid and alkali; 150mm integrating sphere has small opening ratio and high measurement precision.
experiment apparatus:
Lambda 650/850/950 UV-Vis Spectrophotometer
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