Plastic Film Sensor - Multilayers
Multilayer thick filmes such as plastic bottles can be challenge: the reflection from the internal interface may be buried in the noise, surface scratches and internal irregularity influence the signal, and layers over 100 μm are difficult for spectroscopy and interferometry methods.
We designed a low-noise laser triangle sensor to meet the challenge, which includes autofocusing and a live video to monitor the measurement spot, with a rubust-and-simple design for tough manufacturing enviroments.
| Measurement range: | up to 2 mm |
| Thickness repeatability: | 2 μm |
Laser Roughness Sensor
Roughness at the scale less than optical wavelength changes the surface reflection and scattering coefficients, as well as the refractive index of of its coating, which is the base of our measurement method.
We designed a sensor that captures the reflection and scattering profiles in parallel and perpendicular directions relative to the laser beam direction, to derive the roughness value. The sensor matches with a surface roughness standard remarkably well from Ra 2 to 8 (0.05 to 0.2μm). The sensor also measures the surface tilt simultinously.
Demo on a known roughness standard
Camber Measurment Tool - Manual
Here is a simple-to-use camber measurement tool - a laser micrometer measures the height variation of a rotating cylinder on two V-supports. When you rotating the cylinder the sensor will detect the movement and record the maximum variation (μm) since the beginning of the rotation. After one rotation this maximum variation no longer increases, which is the camber value and then you can stop.
| Cylinder diameter range: | 0.5 - 4 inch |
| Laser micrometer static repeatability: | 0.1 μm |
| Manual camber measurement repeatability: | 5 μm |
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Contact: Gang Sun gsun@sunopticalsystems.com