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In third-order astigmatism, the tangential rays (in the tangential plane) and sagittal rays (in the sagittal plane) form foci at different distances along the optic axis. These foci are called the tangent focus and sagittal focus, respectively. In the presence of astigmatism, an off-axis point on the object is not sharply imaged by the optical ...
[[Category:Application software usage templates]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:Application software usage templates]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character.
The focal point F and focal length f of a positive (convex) lens, a negative (concave) lens, a concave mirror, and a convex mirror.. The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power.
The term template, when used in the context of word processing software, refers to a sample document that has already some details in place; those can (that is added/completed, removed or changed, differently from a fill-in-the-blank of the approach as in a form) either by hand or through an automated iterative process, such as with a software assistant.
The U.S. Justice Department has launched a probe into UnitedHealth's Medicare billing practices in recent months, the Wall Street Journal reported on Friday, sending the healthcare conglomerate's ...
In geometry, focuses or foci (/ ˈ f oʊ k aɪ /; sg.: focus) are special points with reference to which any of a variety of curves is constructed. For example, one or two foci can be used in defining conic sections , the four types of which are the circle , ellipse , parabola , and hyperbola .
The use of the FD-302 has been criticized as a form of institutionalized perjury due to FBI guidelines that prohibit recordings of interviews. Prominent defense lawyers and former FBI agents have stated that they believe that the method of interviewing by the FBI is designed to expose interviewees to potential perjury or false statement criminal charges when the interviewee is deposed in a ...
Fixed focus can be a less expensive alternative to autofocus, which requires electronics, moving parts, and power.Since fixed-focus lenses require no input from the operator, they are suitable for use in cameras designed to be inexpensive, or to operate without electrical power as in disposable cameras, or in low-end 35 mm film point and shoot cameras, or in cameras featuring simple operation.