angular apertureの例文

• The light crossing this point is confined to a cone of angular aperture 2 " ? ".
• In air, the angular aperture of the lens is approximately twice this value ( within the paraxial approximation ).
• Perfectly parallel rays ( shown in blue ) would be captured, but sunlight, due to its angular aperture, is partially lost.
• In a medium with an index of refraction close to 1, such as air, the angular aperture is approximately equal to twice the numerical aperture of the lens.
• Instead, the angular aperture of a-number, written / or, which is defined as the ratio of the focal length to the diameter of the entrance pupil:
• All of these reduce the initial acceptance angle and, after they are all factored in, the system must still be able to capture the finite angular aperture of sunlight.
• If the acceptance angle of the optic is wide enough, sunlight incident along the optical axis will be captured by the concentrator, as shown in the " angular aperture of sunlight " figure.
• Sunlight is not a set of perfectly parallel rays ( shown in blue ), but it has a given angular aperture " & theta; " " S ", as indicated by the green rays.