In the field of industrial vision inspection, the role of industrial lenses is crucial, and the selection and use of its parameters directly affects the imaging effect of the programme, so it needs to be understood in detail. The main parameters of the industrial lens include working distance, focal length, aperture, resolution, etc., of which the size of the aperture is one of the important parameters affecting the imaging effect. This article will illustrate the specific impact of aperture on imaging.

Aperture size and depth of field: Aperture size and depth of field are inversely related. A large aperture produces a shallow depth of field, while a small aperture produces a deep depth of field. When shooting scenes that require high clarity, using a small aperture will give you a greater depth of field and allow more images to be clearly presented.

Aperture size and brightness: Aperture size directly affects the amount of light entering the lens. A large aperture allows more light to enter, making the image brighter; a small aperture reduces the amount of light entering, making the image darker. In low-light environments, using a large aperture can improve the brightness of the image.

Aperture size and contrast: Aperture size also affects the contrast of imaging. Large aperture tends to make the edge part of the distortion, resulting in coma aberration and astigmatism, reducing the contrast; small aperture can reduce this effect and improve the contrast of imaging.

Aperture size and resolution: Aperture size has a certain effect on resolution. Although a large aperture can increase the amount of light intake, it may produce diffraction phenomenon and reduce the resolution; a small aperture can reduce this effect and improve the resolution. However, too small an aperture may produce a large depth-of-field range, resulting in the loss of some details in the image.

When selecting industrial lenses, you need to choose the right aperture size according to the actual application scene and requirements to get the best imaging effect. At the same time, it is also necessary to comprehensively consider other parameters of the lens, such as focal length, resolution and imaging element size, in order to adapt to different application scenarios and requirements.