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object
[ob′jəkt] (in psychology) something through which an instinct can achieve its goal; in psychoanalytic terms, a person other than self. See also object relations. Object 1. Something that has a fixed shape or form that you can touch or see. 2. Anything from which an image is formed by an optical system. extended o. An object consisting of many point objects separated laterally to form a certain shape (e.g. trees, people). See beam of light; pencil of light; extended source. o. plane See object plane. point o. A small component of an extended object, in relation to an optical system. If the point object is situated on the axis of an optical system it gives rise to the axial ray and it is referred to as the axial point object. real o. An object from which emergent rays diverge. o. of regard See point of fixation. o. space See image space. virtual o. One towards which incident rays are converging after refraction or reflection. Example: a positive lens forms an image of an object placed beyond its anterior focal point. Introducing a mirror between the lens and the image makes that image become a virtual object. See virtual image. OBJECT Urology A clinical trial–Overactive Bladder: Judging Effective Control and Treatment Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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