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From Navitar, Inc.
The information on this page is a compilation of basics intended to assist you in selecting the best optical components and systems for your specific applications. Magnification is developed in two ways – different lenses create different magnifications at the camera, or camera and monitor combinations develop magnification between themselves. Magnification at the Camera All cameras have a fixed sensor size. This means that no matter how large the image is at the sensor plane, the camera will only "look at" the portion of the subject equal to the sensor size. What the camera "sees" is called the field of view. The lens, or lens system, of the camera controls the magnification at the camera sensor. The lower this magnification, the larger the field of view. Products & Services
Video camera lenses attach to video cameras for use in machine vision, quality monitoring, security, and remote monitoring for industrial and commercial operations. This search form does not cover consumer video camera lenses.
Digital and video microscopes are instruments that use digital technology to magnify images of objects. They include built-in cameras and a series of high-powered lenses that provide superior image quality and resolution.
Optical and light microscopes use the visible or near-visible portion of the electromagnetic spectrum to magnify images of objects.
Camera filters provide a range of optical filtering effects in scientific, research, and industrial applications.
Measuring microscopes are used by toolmakers for measuring the properties of tools. These microscopes are often used for dimensional measurement with lower magnifying powers to allow for brighter, sharper images combined with a wide field of view.
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Topics of Interest
Field of View (FOV): The viewable area of the object under inspection. In other words, this is the portion of the object that fills the camera’s sensor.
Depth of Field (DOF): The maximum object depth...
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Machine vision integrators are often faced with the task of selecting the appropriate lens to optimize their vision system’s performance. Without understand how too assess the optics, this can be...
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Optical zooming is an important mechanism in determining the true zoom power of a camera phone without losing any image data. An optical zoom effect could be interpreted as a true zooming function...
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Afocal systems are without focal length. An ordinary telescope is an afocal system. It forms an image of an infinitely distant object at infinity. Thus, the usual definition for effective focal length...
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A diopter is a unit of measurement describing the optical power of a lens or curved mirror. When shopping for magnifiers, consider this: The diopter is equal to the reciprocal of the focal length...
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Technical Articles
Formulas and Guidelines for Optical Lens Selection
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