MTF is the best proxy for lens performance, but the math behind it and the graphs that depict it often obstruct understanding. This paper demystifies MTF, arming vision system decision makers with the knowledge they need about it to choose the right lens every time.
In response to the popularity of megapixel cameras and sensors, many lens manufacturers are marketing "megapixel lenses." The problem? There's no such thing.
Continuing advances in high-resolution sensors with higher pixel densities and smaller pixels are challenging optics manufacturers to produce lenses of increased performance. To understand how lenses can affect the performance of imaging systems, it is necessary to grasp the physics behind diffraction, lens aperture, focal length, and the wavelength of light (see “Matching Lenses and Sensors,” Vision Systems Design, March 2009). Additionally, other design limitations also restrict the optical capabilities of a lens, even before manufacturing tolerances are taken into account.
Datasheets can be misleading, so how do you know what you are really buying? To help optical designers and engineers view optical datasheets more critically and ask the right questions of lens providers, this article discusses key datasheet parameters.
The Xenon-TOPAZ lenses are designed for sensors up to 12 megapixel and broadband-coated for the spectral range of 400 – 1000 nm (VIS + NIR). This lens has a 2.0 – 16 F# range, and is 50 mm in length.
The Xenon-TOPAZ lenses are designed for sensors up to 12 megapixel and broadband-coated for the spectral range of 400 – 1000 nm (VIS + NIR). This lens has a 2.0 – 16 F# range, and is 38 mm in length.
The Xenon-TOPAZ lenses are designed for sensors up to 12 megapixel and broadband-coated for the spectral range of 400 – 1000 nm (VIS + NIR). This lens has a 2.0 – 16 F# range, and is 30 mm in length.
Designers have been known to “save the lens for last” when creating vision systems with very specific black box dimensions and lighting, resolution, and pixel specifications. One solution to this dilemma is a new and improved design approach called concurrent engineering.
These motorized compact lenses are ideal for variable light conditions where brightness changes over time.
This datasheet includes a detailed description of Schneider Optics’ bandpass filters, as well as information on their features and specifications. To find out how these filters can help with your applications involving biotech, biomedical, traffic, food/beverage inspection, laser, semiconductor, and scientific research, download the datasheet.
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