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Coherentlightsource examples

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Coherencelength

In order to connect a lens to a camera, we need a threaded connection—the mount. Mount sizes are standardized and are indicated by letters, with the C-mount being the most common type used for machine vision cameras. It is used for sensor diagonals measuring up to 20 mm, or 1.5 inches. The thread has a nominal diameter of 1 inch (24.5 mm) and a pitch of 1/32 inches. The flange focal distance of this lens mount is 17.526 mm (0.69 inch).

To get a sharp image, you not only need the right camera, but also the right lens to go with it. Our beginner's guide to lens selection will help.

The most frequently used experimental techniques for measuring the spatial coherence properties of classical light fields in the space–frequency and space–time domains are reviewed and compared, with some attention to polarization effects. In addition to Young’s classical two-pinhole experiment and several of its variations, we discuss methods that allow the determination of spatial coherence at higher data acquisition rates and also permit the characterization of lower-intensity light fields. These advantages are offered, in particular, by interferometric schemes that employ only beam splitters and reflective elements, and thereby also facilitate spatial coherence measurements of broadband fields.

Unpolarizedlight

coherence中文

The most frequently used experimental techniques for measuring the spatial coherence properties of classical light fields in the space–frequency and space–time domains are reviewed and compared, with some attention to polarization effects. In addition to Young’s classical two-pinhole experiment and several of its variations, we discuss methods that allow the determination of spatial coherence at higher data acquisition rates and also permit the characterization of lower-intensity light fields. These advantages are offered, in particular, by interferometric schemes that employ only beam splitters and reflective elements, and thereby also facilitate spatial coherence measurements of broadband fields.

Monochromaticlight

Adapter rings can allow you to connect C-mount lenses to CS-mount cameras, broadening the application reach of the equipment. Note that CS-mount lenses cannot be connected to C-mount cameras due to the shorter flange focal distance.

Lowcoherence light

Jyrki Laatikainen, Meilan Luo, Atri Halder, Matias Koivurova, Tero Setälä, Jari Turunen, and Ari T. Friberg J. Opt. Soc. Am. A 40(6) 1260-1267 (2023)

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

How do you find the right lens for a camera? What roles do resolution, sensor size, image circle, focal length, and lens size play in creating optimal image quality?