| optical righting reflexes | Visual stimuli that enable an animal to maintain the correct position of the head in space, by bringing about movements of the muscles of the neck and limbs. (05 Mar 2000) |
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| optical rotatory dispersion | The method of measuring the dispersion of an optically active molecule to determine the relative magnitude of right- or left-handed components and sometimes structural features of the molecule. (12 Dec 1998) |
| optical scrambler | <microscopy> An optical device for scrambling the image of a non-uniform light source so that it now fills the condenser aperture uniformly without appreciable loss of total luminous flux through the microscope. The scrambler can be a simple loop of a single optical fibre with its ends appropriately polished (05 Aug 1998) |
| optical sectioning | <microscopy> The use of high numerical aperture objective and condenser lenses on a microscope to achieve a shallow depth of field. With a very shallow depth of field, objects above and below focus contribute little to the in-focus image, so that a clean optical section is obtained. See: depth of field. (05 Aug 1998) |
| optical staining | <microscopy> Producing colour in the microscopical image so as to differentiate one part of the object from another. One way is by use of Rheinberg filters. Another is to use polarized light on an anisotropic specimen. Another important method is by dispersion staining. (05 Aug 1998) |
| optical storage devices | A computer disk read by a laser beam, containing data prerecorded by a vendor. The buyer cannot enter or modify data in any way but the advantages lie in the speed of accessibility, relative immunity to damage, and relatively low cost of purchase. (12 Dec 1998) |
| optical transfer function | <microscopy> The relationship between the image produced by an optical instrument and the amplitude and phase of a periodic specimen, measured at various spatial frequencies. The optical transfer function curve, which shows how well contrast is maintained for finer specimen details, is a complex function, of which the real term gives the ratio of amplitudes, and the imaginary term the phase relationships. When the brightness of the periodic specimen varies as a sine wave, the modulus or absolute value of the optical transfer function becomes the modulation transfer function, when the brightness varies as a square wave, the modulation transfer function is known as a contrast transfer function. Acronym: OTF (26 Mar 1998) |
| optical tubelength | <microscopy> The distance from the second principal focal plane of the objective to the front focal plane of the ocular. This distance is about 180 mm for high-power objectives, less for those of low power. (05 Aug 1998) |
| optically | By optics or sight; with reference to optics. <chemistry> Optically active, Optically inactive, terms used of certain metameric substances which, while identical with each other in other respects, differ in this, viz, that they do or do not produce right-handed or left-handed circular polarization of light. Optically positive, Optically negative. See Refraction. Source: Websters Dictionary (01 Mar 1998) |
| optically active | <chemistry> A material which can rotate plane-polarized light. (09 Jan 1998) |
| optician | 1. One skilled in optics. 2. One who deals in optical glasses and instruments. Origin: Cf. F. Opticien. See Optic. Source: Websters Dictionary (01 Mar 1998) |
| opticianry | The professional practice of filling prescriptions for ophthalmic lenses, dispensing spectacles, and making and fitting contact lenses. (05 Mar 2000) |
| optico- | See: opto-. (05 Mar 2000) |
| opticociliary | Relating to the optic and ciliary nerves. (05 Mar 2000) |
| opticokinetic nystagmus | Nystagmus induced by looking at moving visual stimuli. Synonym: opticokinetic nystagmus, railroad nystagmus. (05 Mar 2000) |
| optical glass |
clear homogeneous glass of known refractive index; used to make lenses
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| opticofacial winking reflex |
closure of the lids when an object is brought suddenly into the field of vision.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| optic capsule |
the embryonic structure from which the sclera is developed.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| optic chiasma |
chiasma op
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| optical flat |
a glass plate so perfectly flat that only an interferometer can measure its unevenness.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| OPT | modify to achieve maximum efficiency in storage capacity or time or cost |
|---|---|
| OPT | make optimal |
| OPT | a general disposition to expect the best in all things |
| OPT | the optimistic feeling that all is going to turn out well |
| OPT | a person disposed to take a favorable view of things |
| OPT | expecting the best in this best of all possible worlds |
| OPT | expecting the best |
| OPT | with optimism |
| OPT | the act of rendering optimal |
| OPT | act as an optimist and take a sunny view of the world |
| OPT | modify to achieve maximum efficiency in storage capacity or time or cost |
| OPT | make optimal |