Laser industrial lenses

1. The core features of industrial lenses
High-precision imaging
Compared with consumer-grade lenses (such as mobile phones and camera lenses), industrial lenses pay more attention to the geometric distortion control of the image (the distortion rate is usually <0.1%), resolution (can be matched with high-pixel industrial cameras) and contrast to ensure the restoration of details during inspection or measurement.
For example, in semiconductor wafer inspection, micron-level defects need to be identified by industrial lenses, requiring lens resolutions of tens of line pairs per millimeter (lp/mm).
Adapt to complex environments
Vibration/Shock Resistance: Industrial production lines are often accompanied by mechanical movements, and lenses need to be designed with structures (e.g., metal housings, reinforced lenses) to resist vibrations and avoid optical path deviation.
Wide temperature operation: Some scenarios (such as high-temperature workshops, cold chain logistics) require the lens to work stably at -20°C~60°C or even more extreme temperatures.
Dust/moisture resistant: Lenses are usually IP65 or above protected against dust and liquid ingress.
Interface & Compatibility
Common interfaces include C-mount (flange spacing 17.5mm), CS mount (flange spacing 12.5mm), F-mount, etc., which need to match the size of industrial camera sensors (e.g., 1/2-inch, 2/3-inch sensors).
Some lenses support zoom, aperture manual/auto-adjustment, or integrated light control (e.g., telecentric lenses with coaxial light sources).

2. The main types and applications of industrial lenses
1. Telecentric Lens
Peculiarity:
The telecentric optical path design is adopted, and the main ray of the object/image side is parallel to the optical axis, which can eliminate the perspective distortion of "near large and far small", and the measurement accuracy is extremely high (error < 0.1%).
The large depth of field is suitable for uniform and clear imaging at different object distances.
Apply:
Precision dimensional measurement (e.g., aperture of automotive parts, pad spacing of PCB boards), 3D topography scanning, semiconductor package inspection.
2. Fixed Focus Lens
Peculiarity:
Fixed focal length, simple structure, low cost, suitable for fixed object distance scenarios (such as fixed station detection on the assembly line).
You can choose different focal lengths (e.g. 8mm, 12mm, 25mm, etc.) according to your field of view needs, and use cameras with different resolutions.
Apply:
Logistics barcode identification, food packaging defect detection, metal surface scratch detection.
3. Zoom Lens
Peculiarity:
The focal length can be adjusted in a certain range (e.g. 5-50mm), and the zoom can be adjusted manually or motorically to meet the needs of different field of view.
Some high-end zoom lenses support "parfocal" (the focus does not shift when zooming) for easy dynamic scene switching.
Apply:
Flexible production line (need to adapt to different sizes of workpieces), security monitoring (large-area scanning), robot vision guidance (dynamic adjustment of field of view).
4. Line Scan Lens
Peculiarity:
Used with line scan cameras, the focal plane of the lens is linear, allowing continuous scanning of moving objects, such as conveyor belts, to form a two-dimensional image.
The focal length and the number of pixels of the line scan camera determine the scan width (e.g., with a 2048-pixel line scan camera, the field of view can be wider than 1 meter).
Apply:
Paper/film surface defect detection, printed matter color accuracy inspection, metal sheet online flaw detection.
5. Macro Lens
Peculiarity:
It can achieve high-magnification imaging at close range (magnification is usually 0.1×~5×), the object distance can be as low as a few millimeters, and the detail restoration ability is strong.
It is often used with a ring light source to eliminate shadows and is suitable for shooting small objects.
Apply:
Inspection of electronic components (such as chip pins, capacitor solder joints), microscopic imaging of insect specimens, and surface texture analysis of precision parts.