Choosing the Right Lens for Your Embedded Camera Application

choosing the right lens

Embedded vision systems are being adopted by smart cities more frequently to improve citizen experiences. They make use of imaging solutions including intruder detection, smart parking lot and traffic management, and infrastructure monitoring systems. The environment, including difficult outdoor lighting conditions, is one of the largest obstacles for these systems. Modern embedded vision systems, however, have the imaging capability to get around this.

It could be challenging to put in a whole solution for your embedded vision in automation system, given the wide range of Embedded cameras and integrated vision options available. If you select the incorrect lens or sensor for your embedded vision camera, you stand to lose a device that is unable to record images rapidly enough or to concentrate on the intended target. The best part is that you’ve arrived at your destination! Discover how to choose the ideal lens for your embedded vision project.

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Requirements for Embedded Vision Cameras

There are many processes involved in selecting an embedded camera, including defining the application, selecting a sensor/camera module, choosing the ideal lens assembly, the ideal interface, the best host platform, and more.

Before you choose a camera or lens or anything for your embedded vision project, you need to consider many factors. What has to be observed, recorded, or measured? How do you want your embedded vision system to enhance your current system? How should your vision system interact with your automated equipment? What type of light source do you have, and what wavelengths do you intend to capture? One has to take the sensor into account while selecting the lens for an embedded vision application.

Usage of Lens in Embedded Vision Camera

The optimal lens is directly correlated with the type of camera sensor that is being used. The size of the sensor and the pixel are crucial parameters. To prevent shading and vignetting, the lens must be able to fully illuminate the sensor region. Additionally, it must be able to resolve pixel size. A lens’s optical resolution determines how well detailed features may be reconstructed.

Types of Lenses

A camera lens directs a beam of light onto a sensor array, where it is processed into a picture. There are wide-angle and fish-eye lenses, as well as entocentric or telecentric lenses in general. For near infrared, there are furthermore highly specialized lenses. The following are the most prevalent types of lenses are wide-angle lens and normal lenses.

A wide-angle lens, which has a focal length of 35 mm or lesser, magnifies close-up objects while those at a downsizing distant object.

Normal lenses typically have a 50 mm focal length, which equates to the film format’s diagonal. The aperture for the lenses and the sensor in typical entocentric lenses is fixed. Aperture angle is comparable to that of the human eye. Closer items appear larger, and farther away objects look smaller. Human eyes are the most prevalent source of entocentric lenses.

Choosing the Best lens for Your Need

Machine vision camera manufacturers now provide more alternatives than ever before. We’ll go through some of the most frequent and crucial options you’ll have to pick from.

Sensor Size

When choosing the appropriate lens, the sensor size is crucial. Particularly, high-resolution area scan and line scan cameras have larger sensors than lower resolution cameras. The resolution and pixel size of the sensor establish its dimensions, rather than being set by any standard.

Focal Length

The distinguishing feature of a lens is its focal length. When the lens is aimed at infinity, it is the distance from that point to where light rays converge. The substance of the lens and its curve both affect the focal length. Longer focal lengths require a lens to be farther away from the sensor than shorter focal lengths, and vice versa. The following formula can converge this session.

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Resolution and Pixel

Pixel resolution refers to how many millimetres of each pixel on an image. The sharper the image, the higher the resolution. More is needed than just a high megapixel count to obtain a genuinely good high resolution image. The lens has to be able to resolve the pixel size as well. The number of lines per millimetre that appear to be distinct from one another is the resolution of a lens, which is expressed as line pairs per millimetre. The resolution of the lens is improved by the number of line pairs that appear to be distinguished.

The lens resolution determines how large the pixels can be while still being able to resolve them. The majority of the time, the lenses are immediately, given the resolvable megapixels.

Aperture

A lens’s aperture is described using its f number (/#) or f-stop number. It relates to the proportion between a lens’s diameter and its focal length. It shows how much light is passing through the lens. More depth of field is achieved by using a smaller aperture and a longer focal length.

Field of View

One of the most crucial factors in choosing a lens is the field of view (FOV), which is determined by the image diameter. The lens’ imager size must be more than or equivalent to the dimension of the sensor being used with the lens. You could still utilize the lens, but the real field of view would be lost if the imager size was too wide.

How Vadzo can assist you?

Vadzo, a renowned developer and manufacturer of embedded vision solutions, will help you choose the ideal lens to meet the demands of your particular application. Additionally, we help product designers with lens fixation and mount modifications, as well as the removal of issues such lens vignetting and colour distortions. Moreover, we have experience offering services like ISP tuning, firmware upgrades, enclosure design, carrier board design, and more for our camera modules.

To begin your camera integration adventure, visit our website and choose the most suitable camera for your application.

If you need assistance choosing the proper lens or integrating cameras into your projects in general, feel free to Contact Us

 

Cheers,

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