Application Notes
Dimensional measurement of perforations on a paper box
Micron-sized shape measurement using a laser microscope
A paper box “zipper”
1. Application
Food is often packaged in paper boxes. Many of these boxes have perforations known as a "zipper" at the opening area. Once the zipper is pulled, the box can be easily opened along the perforation, allowing access to the contents. Managing the depth and angle of the perforations is important to help ensure that the zipper tears neatly.
2. The Olympus solution
Olympus' LEXT 3D laser scanning microscope combines multiple images from the confocal optical system, enabling observation of high-precision 3D shapes, even for very deep perforations. Thanks to dedicated objective lenses with high numerical apertures and a dedicated optical system that obtains maximum performance from the 405 nm semiconductor laser, the LEXT microscope can clearly capture the profile of a sharp slope. Because the LEXT is also an optical microscope, users can simultaneously acquire both 3D and color images; the color information from the paper box can be overlaid on the perforation to enhance the visual effect. The measurement results obtained by the LEXT microscope can also be used to adjust the dimensions of the cutting blade used to make the performations, which helps produce products that are easy to open and consumer-friendly.
Images
(1) Sample 1
(2) Sample 2
(3) Sample 3
Related products
LEXT OLS5500
Hybrid 3D Optical Profilometer
- Traceable surface measurements from the nanometer to micrometer scale
- Laser scanning microscopy (LSM), white light interferometry (WLI), and focus variation microscopy (FVM) in one award-winning platform
- First 3D optical profilometer to offer guaranteed accuracy and repeatability* for both LSM and WLI measurements
- WLI mode delivers up to 40x faster measurement throughput than conventional LSM
- Exceptional precision across surfaces with in-house engineered optics
- Intuitive interface and smart automation streamline operation for users of all levels
- AI-enhanced and high-throughput workflows with PRECiV™ software integration
*Based on Evident’s internal research as of October 2025. The guaranteed accuracy and repeatability apply only if the device has been calibrated according to the manufacturer’s specifications and is in defect free condition. Calibration must be performed by an Evident technician or an Evident-authorized specialist.
LEXT OLS5100
The LEXT™ OLS5100 laser scanning microscope combines exceptional accuracy and optical performance with smart tools that make the system easy to use. The tasks of precisely measuring shape and surface roughness at the submicron level are fast and efficient, simplifying your workflow and delivering high-quality data you can trust.