Mobile phone cover light transmission meter
The mobile phone cover light transmission meter is a series of light transmittance meter suitable for testing the glass cover of the mobile phone. These instruments can be used to test the transmittance of the hole of light sensor on the lens and the distance sensor.
Most people now use touch screen mobile phones. Touch screen mobile phone lenses have certain requirements on light transmittance. At the same time, the mobile phone cover has an IR hole and a photosensitive hole for transmitting infrared and visible light. Holes also have certain requirements for transmittance.
The IR hole on the lens of the mobile phone is used to transmit infrared rays, because the infrared light source emitted inside the mobile phone will be reflected back when the ink lens contacts the human skin. When the distance sensor senses a certain infrared intensity, the touch screen will be closed. Avoid hanging up or shutting down when the touch screen touches the person's face when answering the call. The light sensor adjusts the brightness of the screen of the mobile phone through external light transmitted through the photosensitive aperture.
At present, the mobile phone lens industry requires a certain amount of requirements for the light transmittance of the light sensing hole of 550 nm and the infrared transmittance of the IR hole of 940 nm and 850 nm. Linshang LS108A and LS108D mobile phone lens transmission meter can meet the above three test requirements at the same time.
In addition to these two holes, the transmittance of the transparent portion of the lens of the mobile phone and the ink portion is also required to be detected. Lens ink is a low-temperature baking environmentally friendly solvent-based ink with good adhesion and strong infrared transmittance. The light transmittance of the test ink part needs to be used with the LS117 light transmittance meter. This is an instrument using the diffuse transmission principle. Specifically, it is used to test the light transmittance of some opaque materials. The transmittance of the glass cover for the transparent portion can be tested using the light transmission meter LS183 or LS108H.
All of the above five light transmission meters can be used to test the light transmittance. It is necessary to select the correct instrument for different test parts to improve production efficiency.
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