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车Lights are key components for automotive safety, and their surface quality directly affects the lighting effect and service life. If the PC (polycarbonate) lampshade of the car headlight is not treated after molding, scratches and damages are prone to occur on the surface, resulting in light scattering and decreased lighting performance. To prevent such damage, car lamp processing factories usually spray or dip coat a layer on the surface of the lamp fixtureHardcoatThe hard coating can resist scratches in daily use, as well as UV aging and micro impact. But the thickness of the coating needs to be precisely controlled - if it is too thin, the protective effect will be compromised; Too thick, material costs increase, and may affect optical performance.
Filmetrics F10-HC Film Thickness Gauge It is a tailor-made solution for this scenario. It adopts a contact probe design, which can effectively suppress the back reflection interference of PC transparent substrate. Whether it is a flat or curved lampshade, it can accurately measure the coating thickness within 1 second. In the automotive lighting industry, well-known enterprises such as Koito Automotive Lighting, Changchun Haila, Xingyu Automotive Lighting, Zhejiang Zero Run, and Tongming High tech have all adopted F10-HC film thickness gauge for coating quality control.
Measuring principle | Spectral reflectance method (non-destructive) |
thickness range | 50 nm ～ 70 μm |
measurement accuracy | 0.01 μm（10 nm） |
spot size | 200 μ m (contact probe) |
measure time | <1 second/point |
wavelength range | 380～1050 nm |
Applicable scenarios | PC/Acrylic Hard Coating, Anti fog Layer, Primer/Penetrating Layer |
There are three key steps that require the Filmetrics F10-HC film thickness gauge for accurate thickness measurement:
Hard coating is sprayed on the external surface of PC lampshade to prevent scratching, abrasion and aging. The contact probe of the F10-HC optical film thickness gauge can directly adhere to the surface of curved lampshades, accurately locate the 200 μ m light spot, and quickly output thickness data.
After the hard coating is applied, the lampshade needs to undergo high-temperature curing treatment. During this process, the part of the hard coating in contact with the PC substrate will penetrate into the interior of the PC resin, forming an interpenetration layer (IPL), greatly enhancing the adhesion between the coating and the substrate and preventing detachment. But the thickness of the infiltration layer needs to be strictly monitored - if too much infiltration occurs, the surface hard coating will become thinner and the protective effect will weaken; There is too little infiltration, insufficient bonding force, and there is still a risk of coating detachment.
The multi-layer simulation algorithm of F10-HC film thickness gauge can simultaneously analyze the thickness of the surface hard coating and the permeation layer, distinguish the two layers clearly, and help process engineers accurately control the curing parameters.
If the inner wall of the car light becomes foggy, it will seriously affect the lighting effect. Therefore, an anti fog coating will be applied to the inner surface of the lampshade. The anti fog coating is usually thin and directly deposited on the surface of the PC, which also requires an F10-HC optical film thickness gauge to accurately measure its thickness and uniformity.
Measurement result of anti fog layer, thickness 1.8544um
Specially designed for hard coatings: The F10-HC film thickness gauge is developed based on the F20 optical film thickness gauge platform, specifically optimized for common coatings such as hard coatings, primers, and anti fog layers in car lights, with built-in multi-layer simulation algorithms.
Contact probe to suppress back reflection: The PC substrate is transparent, and back reflection can interfere with the signal when measuring with a regular film thickness gauge. The contact probe of the F10-HC film thickness gauge is tightly attached to the surface of the sample, completely eliminating back interference and eliminating the need for blackening or roughening the back of the sample.
Worry free surface measurement: The headlight cover is a three-dimensional surface, and the special probe of the F10-HC film thickness gauge can fit any surface. The 200 μ m small light spot is accurately positioned without being affected by curvature.
Millisecond level measurement, adapted to production line rhythm: single point measurement takes less than 1 second, and with template mode, multiple measurement paths can be preset, greatly improving detection efficiency.
Industry leading customer verification: Many car lighting and material companies such as Koito Automotive Lighting, Changchun Haila, Zhejiang Lingpao, Changzhou Tongbao, Tongming High tech, Changcheng Automotive Industry, Xingyu Automotive Lighting, Gerhan Automobile, Maitu High tech Materials, Tengcang Huacheng, etc. have adopted it.
Koito car lights
Changchun Haila
Zhejiang Zero Run
Changzhou Tongbao
Tongming High Tech
Changcheng Automotive Industry
Xingyu car lights
Gerhan Automobile
Maitu High tech Materials
Teng Canghua
Can the F10-HC film thickness gauge accurately measure the transparent PC lampshade?
Can. The ordinary film thickness gauge may be affected by back reflection interference when measuring on transparent substrates, but the F10-HC film thickness gauge uses a contact probe. When the probe is attached to the sample surface, it can effectively suppress back reflection and only collect reflection signals from the coating surface. The data is accurate and reliable.
The lampshade is curved, can the probe fit properly?
Okay. The contact probe design of F10-HC film thickness gauge specifically considers the requirements of curved surface measurement. The front end of the probe can be attached to concave and convex surfaces, and with a 200 μ m small light spot, it can accurately locate the measurement point on the curved lampshade.
Can the permeation layer and hardening layer be measured simultaneously?
Okay. The F10-HC film thickness gauge software has built-in multi-layer simulation algorithms, which can model multi-layer stacked structures such as primer/hard coating/permeable layer, and synchronously output the thickness and refractive index n/k values of each layer in one measurement.
What is the difference between F10-HC film thickness gauge and F20 film thickness gauge?
F20 is a universal film thickness gauge suitable for flat samples; The F10-HC film thickness gauge is an industry-specific model that uses a contact probe to suppress back reflection. It is optimized for measuring hard coatings, anti fog layers, and curved surfaces, making it more suitable for the automotive lighting industry.
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