Selecting the Best Lens for Desired Field of View
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When scanning an object in 3D, it is important to determine if the hardware you are using is best suited for the size of the object you are scanning. Lenses in particular will influence the 3D scanner's field of view. This short article discusses how lenses with different focal lengths (mm) and other factors can affect the field of view.
![16192527940<br />3D Scanning ArticleSelecting the Best Lens for Desired Field of View <br />AbstractWhen scanning an object in 3D, it is important to determine if the hardware you are using is best suited for the size of the object you are scanning. For optical 3D scanners including white light 3D scanners, the camera and projector lenses determine a scanner’s field of view. This short article discusses how lenses with different focal lengths (mm) and other factors can affect the field of view.<br />Selecting the Best Lens for Desired Field of ViewWhich lens should I use for my 3D scanning application?<br />When scanning an object in 3D, it is important to determine if the hardware configuration is suited for the size of the object. For optical 3D scanners including white light 3D scanners, the camera and projector lenses determine a scanner’s field of view. Field of view (FOV) is the observable area that an optical instrument is able to capture from a specific distance. The most common focal lengths for camera lenses are 9mm, 12.5mm, 16mm, and 25mm lenses. <br />The field of view for 3D scanner configurations depends on the following factors: <br />,[object Object]](https://image.slidesharecdn.com/selectingthebestlensfordesiredfieldofview-100419174324-phpapp02/85/Selecting-the-Best-Lens-for-Desired-Field-of-View-1-320.jpg)
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Selecting the Best Lens for Desired Field of View
- 2. lens on the projector
- 4. Distance to the object: How far the lens is from the object.
- 6. 12.5mm lens: Scans human faces from approximately 75 cm away from the scanner.
- 7. 16mm lens: Scans small objects such as a computer mouseIt might appear that it would be better to use a lens with a smaller focal length. However, there is an inverse relationship between focal length and lens distortion. For example, the smaller the focal length (mm), the larger the distortion you tend to get when 3D scanning an object. All lenses have a certain amount of distortion that is unavoidable. Even though 3D3 Solutions 3D scanner software, FlexScan3D, compensates for lens distortion you do want to minimize the starting amount. <br />While zoom lenses provide more flexibility, they also have a tendency to create more distortion and are more expensive than non-zoom lenses. We recommend using non-zoom lenses. <br />If you purchase your own lenses for your 3D scanner, another factor to consider is each lens has an effective focal range. Focal range is the distance from a lens to its focus. Some are set to focus on objects from 1 meter to 2 meters, while others are set to focus from 1cm to 10cm. Most scanning projects require a focal range of 5cm to approximately 1.5 meters but experimenting with different settings is critical to determine the desired field of view for your particular application.<br />About 3D3 Solutions<br />3D3 Solutions is a cutting edge developer of 3D scanning and visualization technologies. 3D scanning technologies have typically been available as high-end industrial systems that are expensive and limited to specific objects they can scan. The company's mission is to offer affordable 3D scanning systems that are versatile across many applications using their expertise in white light scanning technology and the latest digital measurement advancements.<br />-19050290830For more information, please contact:<br />Telephone: (604) 568 9638Email: contact@3d3solutions.comWebsite: www.3d3solutions.com<br />