| conjugate planes/points | <microscopy> Planes (or points) that are in focus relative to each other. In a microscope adjusted for Koehler illumination, there are two sets of conjugate planes: the aperture planes and the field planes. See: field planes, Koehler illumination (05 Aug 1998) |
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| points, conjugate | <microscopy> The pair of points on the principal axis of a mirror or lens so located that light emitted from either point will be focused at the other. Related points in the object and image are located optically so that one is the image of the other. See: polarizing element (05 Aug 1998) |
| points of convergence | <microscopy> In colour video cameras and monitors, the precise alignment of the images or pictures in the three primary colours (red, green and blue). A lack of convergence gives rise to asymmetrically coloured fringes. (05 Aug 1998) |
| craniometric points | Fixed point's on the skull used as landmarks in craniometry. (05 Mar 2000) |
| tender points | Various point's in the course of a nerve, pressure upon which is painful in cases of neuralgia; these point's are: 1) where the nerve emerges from the bony canal; 2) where it pierces a muscle or aponeurosis to reach the skin; 3) where a superficial nerve rests upon a resisting surface where compression is easily made; 4) where the nerve gives off one or more branches; and 5) where the nerve terminates in the skin. Synonym: tender points. (05 Mar 2000) |