How does the spectral confocal sensor measure the aperture panel camera module dispensing? With the diversification of screen forms and the gradual maturity of "under-screen camera" technology, "hollowed out screen" has gradually become the mainstream screen form in the 5G era. Behind the new technology, the screen structure makes the "hollowed out screen" mobile phone long-term stability by upgrading the processing technology and using more accurate image measuring instrument detection technology. In order to more extreme visual experience, after the fringe screen, full screen, slide screen, double-sided screen, the hole screen has also come.

The hole hole is divided into two kinds of technology: through hole and blind hole. Through the hole is a hole in the screen, for the front camera imaging is more favorable, after all, less a layer of barrier, but the process is relatively more complex, the quality control requirements are more stringent, the yield is lower, there is a problem is that the aperture is larger, generally more than 6.5mm. The blind hole is to put the camera under the screen, the process is relatively more mature, the yield is high, the cost is low and the aperture is small, but because of the extra layer of liquid crystal, it is bound to affect the transmittance, and the image quality of the camera will also have a certain impact.

The "through hole" can effectively reduce the screen layer's blocking of the front camera, so that it has an advantage when taking photos to obtain light. Therefore, it is only necessary to consider the place where the screen is punched and the camera is well connected, this process has high requirements for the height of the dispensing, if the height of the glue is inconsistent, the imaging effect of the final screen has the problem of gaps and unnatural connections. The use of spectral confocal sensor can be a good solution to this problem, not only can fully measure the height of the glue, but also can measure the width, high-speed sampling frequency, more suitable for automated equipment online.

Since the glue is the transparent glue used, there are two difficulties in the detection of this glue, one is that after the glue is dispensed, the shape of the glue is curved, which is a very test of the mirror reflection Angle of the light pen, if the monochrome laser sensor detection, it will cause the light to penetrate, the laser directly penetrates to the bottom of the glue, or because of the reflection Angle caused by the arc, it can not reflect the light back.

Therefore, the current common practice in the industry is to use a large Angle spectral confocal sensor, because the spectral confocal sensor uses white light, white light is composite light, there will always be light can be reflected back, and for the arc, increase the reflection Angle of the light pen (45°), so as to perfectly measure the outline of the white transparent glue.

Spectral confocal sensor is the "Gospel" of glue height measurement, traditional point laser measurement, there is no comprehensive scanning situation. The spectral confocal sensor adopts the thickness measurement mode, and two different wavelengths of light are focused on the front and back of the glue. By calculating the wavelength of the sensed focus, the distance value can be converted to obtain the distance value, and the height value of the glue can be collected in one measurement to avoid adhesive caused by contact measuring equipment. Impartial, precise as needed.

Secondly, the spectral confocal sensor has a good compatibility with the color material of the measured object, which ensures the compatibility of the device for the transparency and color of the glue to a large extent.

For the fixed fixture of the product, the spring structure can accommodate different sizes of products, ensuring that customers do not need to replace the fixture when replacing the screen of different sizes for measurement, improving the test compatibility of measuring equipment. Effectively reduce customer production costs.

At the same time, for products with fingerprint recognition design on the back, the design of "avoidance hole" is added to effectively avoid wear on the fingerprint part during the detection process.

In the 5G era, the small aperture screen does not affect the vision, on the other hand, it will not take up too much space inside, giving people a better immersive experience. Based on the comprehensive, professional, efficient and intelligent mobile phone camera round hole measurement solution, Sirui measurement adds precision power to the ultimate visual enjoyment of 5G hole screen mobile phones.