How to calculatefocal lengthof convexlens

Keep in mind that this formula assumes thin lenses and a paraxial approximation, which are valid for many practical situations. However, for complex optical systems or special lenses, additional considerations and corrections may be required for accurate calculations.

So if you are looking for help in picking and integrating the right camera into your embedded system, please don’t hesitate to reach out to us at camerasolutions@e-consystems.com. Meanwhile, you could browse through our complete portfolio of cameras here.

Focal length calculatorconvexlens

By utilizing this focal length calculator tool, you can determine the focal length needed to capture an image of an object at a specified distance. This calculation allows you to ensure that desired field of view will be captured by your optical module.

Visit our optical products pages for a full list of C-Mount lenses, M12/M10/M8/M6 screw mount lenses, optical filters, and optics accessories including custom designed lens mounts, extension tubes and adapters.

To learn everything about choosing the right lens for your embedded vision system, please visit the article How to choose the right lens for your embedded camera application.

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In embedded vision – in most cases – the image sensor is chosen first. This would mean that the choice of lens is heavily determined by the sensor you use (since AFOV depends on the sensor size). For a given sensor size, to achieve a wider FOV, you need to go with a short focal length lens and vice versa. However, since the focal length cannot be made shorter beyond a point, increasing the sensor size also helps to achieve a wider FOV.

From this equation, it can be understood that the shorter the focal length, the wider the AFOV, and vice versa. This is clearly depicted in the figure below:

Field of view and focal length are two of the most important concepts when it comes to lenses. While focal length is the defining property of a lens, field of view can vary depending on certain other parameters. And when you select a lens for your embedded vision application, you need to make sure that you pick the right one for your sensor such that the desired field of view is achieved.

e-con Systems has been raising the bar in embedded vision for close to two decades now. With a wide portfolio of MIPI cameras, USB cameras, GMSL2 cameras, FPD-Link III cameras, and GigE cameras, e-con stands true to its vision of enabling machines to see and understand the world better every single day. We have our cameras deployed in more than 300 customer products and have shipped over 2 million cameras globally.

Focal lengthto magnificationcalculator

Prabu is the Chief Technology Officer and Head of Camera Products at e-con Systems, and comes with a rich experience of more than 15 years in the embedded vision space. He brings to the table a deep knowledge in USB cameras, embedded vision cameras, vision algorithms and FPGAs. He has built 50+ camera solutions spanning various domains such as medical, industrial, agriculture, retail, biometrics, and more. He also comes with expertise in device driver development and BSP development. Currently, Prabu’s focus is to build smart camera solutions that power new age AI based applications.

Calculatefocal lengthfrom image

The angular field of view (AFOV), which represents the extent of the observable scene in degrees, can be derived from the field of view (FOV) and working distance (WD).

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You can save development effort and reduce product costs with an optical module. Optical modules include a high-performance image sensor module paired with an ideally matched lens and lens mount, which provides easy compatibility with your choice of image processing board via FRAMOS’s standardized PixelMate™ interface.

Usually, the horizontal dimension (which is nothing but the HFOV) and the working distance are given values. Using these, you would be able to calculate AFOV.

By measuring the object distance (u) and the corresponding image distance (v), you can substitute these values into the lens formula and find the focal length (f). It’s important to know that the focal length of photographic lenses is usually expressed in millimeters (mm).

Now DFOV can be calculated by replacing HFOV with it in the above equation. Since AFOV and working distance are known entities, DFOV can be derived using this.

Determine the best optical fit for your project based on the required sensor size and image circle, desired operating range and field of view (FOV), and lens type requirements specific to your application.

It should be noted that as the field of view widens, the resulting image may exhibit more distortion. In certain cases, distortion can be mitigated using dewarping techniques. However, it is advisable to select a lens optimized for the intended field of view to minimize distortion in the original image.

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However, in most cases, the FOV of a lens is expressed using DFOV or Diagonal Field of View. So, you might have to calculate the DFOV value as well. Let us see how that is done.

Field Of View is the maximum area of a scene that a camera can focus on/capture. It is represented in degrees. Depending on how you measure it, FOV can be represented either vertically, horizontally, or diagonally as shown in the image below:

In this article, we attempt to learn what focal length and field of view are, their differences, and why it is important to understand the two concepts thoroughly when it comes to choosing a lens for your embedded vision application.

Focal length is the defining property of a lens. It is the distance between the lens and the plane of the sensor, and is determined when the lens focuses the object at infinity. It is usually represented in millimeters. Its value depends on the curvature and the material of the lens.

Picking the right lens considering multiple factors can sometimes be overwhelming. And this is where e-con Systems can help. While integrating our camera modules, we work closely with our customers to help them choose the best-fit lens for their application. We also extend lens fixation and lens mount customization services.

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The focusing power of a lens and its focal length is inversely proportional. A lens with a longer focal length, when compared to a lens with a shorter focal length, will result in a smaller field of view and increased magnification of objects. The field of view can be expressed as a dimension in millimeters or degrees. When the sensor size (H), desired field of view (FOV), and working distance (WD) are known, it is possible to estimate the required focal length (f) of the lens using the following equation.