Fish eye detector is an instrument used to detect fish eye like defects in transparent or semi transparent films. It is mainly used to measure and analyze fish eye defects (gel spots or impurities that are not fully plasticized) on the surface of resin plastic films, and to accurately assess the size and number of defects through optical amplification and standard plate comparison. It is widely used in film production, optical detection and scientific research fields.
The fisheye instrument uses optical projection amplification and comparison with a standard plate to detect the size and distribution of fisheye defects on the surface of materials in real time. It supports fast automatic detection and has significantly improved efficiency compared to traditional manual detection. The fisheye instrument mainly uses the principle of convex lens magnification imaging to project and magnify the fisheye or defect points on the film, and then evaluates the size and quantity of the fisheye by comparing it with a standard plate with holes. It has the characteristics of simple and convenient operation, real-time observation and zooming in/out of fisheye images, automatic generation of detection reports, and printing and storage of reports and spectra. It also has one click calculation function, which is suitable for the detection of various transparent films.
Main types
Traditional fisheye instrument: It is a projection type magnifying detection device that is manually compared. Inspectors need to manually observe the projection and compare it with a standard plate, which requires high labor intensity and rough measurement results.
Automatic Fish Eye Instrument: Based on machine vision technology, it can accurately measure and locate fish eye defects, evaluate, record, archive defects, and display real images. It has the advantages of speed, reliability, and accuracy.
Core principles and structure
Convex lens magnification imaging
The fisheye instrument utilizes the magnifying effect of a convex lens to project and magnify fisheye defects (usually between 0.01-1mm in diameter) on the surface of a thin film to a clearly visible size, making it easy to observe and measure small defects.
Standard board comparison and evaluation
The enlarged image is compared with a perforated standard plate, and the aperture of the standard plate corresponds to the size of the defect. The actual size of the fish eye is determined through comparison, and the quantity and distribution are counted. Some devices support automatic image processing algorithms and can generate defect reports with just one click.
Optical System Design
Adopting standard optical structure to ensure clear imaging and minimal distortion, and equipped with spare light bulbs or LED light sources to ensure measurement continuity. Some devices support light source intensity adjustment to adapt to thin film materials of different transparency.