The following images of the same target captured with KEYENCE’s 240,000-pixel and 2 million-pixel camera and magnified with a PC. Which image shows the characters more clearly? Of course, the 2 million-pixel camera. The difference in image quality directly affects the inspection accuracy when using image processing technology. Camera selection according to the application is also important.

Nikonlens selection

Many vision sensor manufacturers focus on explaining Step 3, “Processing the image data”, and emphasize the processing capability of the controller in their catalogs. Step 1, “Capturing an image”, however, is the most important piece for accurate and stable image processing. The key to making Step 1 a success is proper selection of a lens and illumination system. This basic guide details how to successfully capture an image by selecting a suitable lens.

2024114 — FOV. The field of view observes your optical device that captures the scene's width. In FOV, your action camera covers the maximum area by ...

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The iris diaphragm and focus should be adjusted by an operator looking at the camera's monitor screen to make sure the image is “bright and clear”.（Some lenses have fixed adjustment systems）

Nov 14, 2024 — The meaning of MAGNIFYING GLASS is a specially shaped piece of glass that is attached to a handle and is used to make an object look larger ...

Finally, the point spread function is just the image of a point source (like a star) formed by the lens. So all we have to do to measure MTF is take a high ...

※ There are various points that need to be considered when selecting a lens, such as field of view, focal distance, focus and distortion. This guide focuses on two points important for all applications, “Selecting a lens to match the field of view” and “Focusing an image with a large depth of field”.

Lensresolution

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Many product data sheets for UV light curing adhesives and materials suggest that they need to be cured with 365nm UV light, or they show an example cure ...

Clear images are the most important part of image processing. The following three points are essential for high-accuracy, stable inspection.

Lens selectionchart

It will be difficult to consistently detect the defects in the image on the left, even if a high-performance controller is used. With the right combination of knowledge, it will be easy to create a highly focused image like the image on the right.

This relationship was later recognized to hold in a wide range of figures: a prism with rectangular sides and square or triangular base has three times the ...

Example 1: When the focal distance is 16 mm 0.63” and the CCD size is 3.6 mm 0.14”, the WD should be 200 mm 7.87” to make the field of view 45 mm 1.77”.

Lens SelectionTool Hikvision

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The following images are captured with KEYENCE’s high-resolution CA-LH16 lens and standard CV-L16 lens. The difference in the image quality is caused by the lens materials and structures. Higher-contrast images can be produced by using a high-resolution lens.

Germanium (Ge) is well suited for manufacturing of windows and lenses for IR applications in lasers and optical systems. from 132 $. Estimated delivery time: 4 ...

Convex mirror is ideal for low ceiling areas, elevators and smaller viewing areas in warehouses, loading docks, production areas, offices and public areas.

Lens selectioncamera

The WD and view size are determined by the focal distance and the CCD size. When NOT using a close up ring, the following proportional expression can be applied.

Image processing is the process of detecting changes in pixel density data through calculation. As such, stable detection requires projection of a clear image. The lens selection plays an important role in determining the performance of image processing–based inspection. This section introduces the basic knowledge required for selecting the correct lens.

Product developed in collaboration with Hampton Research (USA) for use in crystallography in HTS (manual and automated systems). • L x w x h (mm): ...

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Distortion is the ratio of change between the center and edge areas of a captured image. Due to the aberration of the lens, the distortion is more noticeable at the edges of a captured image. There are two types of distortion: barrel distortion and pincushion distortion. The general rule is that when the absolute value of the distortion value is small, the lens offers higher accuracy. Lenses with smaller distortion should be used for dimension measurement, for example. Lenses with a long focal distance generally have smaller distortion.

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A camera is installed as shown in the illustration. A graduated tape that indicates the height is attached on a slope. In this situation, the pictures are taken to compare the apertures.

Focal distance is one lens specification. Typical lenses for factory automation have focal distances of 8 mm 0.32”/ 16 mm 0.63”/ 25 mm 0.98”/ 50 mm 1.97”. From the necessary field of view of the target and the focal distance of the lens, the WD (working distance) can be determined.

The next section will cover “illumination selection”. Along with the lens selection techniques discussed in this guide, illumination selection is an important factor for determining inspection accuracy when using image processing technology. The next guide will outline points for selecting an appropriate illumination.