optic axis

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Related to Optical axis: focal length, visual axis

axis

 [ak´sis] (pl. ax´es)
1. a line through a center of a body, or about which a structure revolves.
the second cervical vertebra. adj., adj ax´ial.
2. the position of the cylindrical part of a lens, used for correcting astigmatism; the range of values is from 0° to 180°.
celiac axis celiac trunk.
dorsoventral axis one passing from the posterior to the anterior surface of the body.
electrical axis of heart the preponderant direction of current flow through the heart, a consequence of the electromotive forces within the heart. It may be computed on either an instantaneous basis or a mean basis.
frontal axis an imaginary line running from right to left through the center of the eyeball.
axis of heart a line passing through the center of the base of the heart to the apex.
instantaneous electrical axis the electrical axis of the heart determined at a given point in time.
lead axis the imaginary direct line between the two electrodes of the bipolar leads or between the positive electrode and the reference point of the unipolar leads.
mean electrical axis the average direction of the activation or repolarization process during the cardiac cycle; it may be determined for any deflection (P, QRS, ST-T) and in the frontal, transverse, or sagittal plane.
optic axis
1. a line connecting the center of the anterior curvature of the cornea (anterior pole) with that of the posterior curvature of the sclera (posterior pole).
2. the hypothetical straight line passing through the centers of curvature of the front and back surfaces of a simple lens.
phlebostatic axis a point located by drawing an imaginary line from the fourth intercostal space at the sternum and finding its intersection with an imaginary line drawn down the center of the chest below the axillae.
Phlebostatic axis.
sagittal axis an imaginary line extending through the anterior and posterior poles of the eye.
visual axis an imaginary line passing from the midpoint of the visual field to the fovea centralis.
Axes of the eye. From Dorland's , 2000.

op·tic ax·is

[TA]
the axis of the eye connecting the anterior and posterior poles; it usually diverges from the visual axis by 5° or more.
Synonym(s): axis opticus [TA]

op·tic ax·is

(op'tik ak'sis) [TA]
The axis of the eye connecting the anterior and posterior poles; it usually diverges from the visual axis by five degrees or more.

axis

pl. axes [L., Gr.]
1. a line through a center of a body, or about which a structure revolves.
2. the second cervical vertebra.

celiac axis
celiac trunk.
axis cylinder
axon.
dorsoventral axis
one passing from the back to the belly surface of the body.
electrical axis of heart
the resultant of the electromotive forces within the heart at any instant. See also mean electrical axis.
external bulbar axis
the optical axis that connects the anterior and posterior poles of the eyeball. Called also optic axis.
frontal axis
an imaginary line running from right to left through the center of the eyeball.
axis of heart
a line passing through the center of the base of the heart and the apex.
optic axis
see external bulbar axis (above).
orbital axis
a line passing through the apex of the bony orbit and the center of the opening of the orbit.
sagittal axis
an imaginary line extending through the anterior and posterior poles of the eye.
visual axis
an imaginary line passing from the midpoint of the visual field to the fovea centralis.
References in periodicals archive ?
If you're going to attach an optic directly to the rail, you'll first need to put its optical axis about 2.
With this aim in view it is necessary for the optical axis of collimating collecting lens to fall on the area of maximum emission intensity, condition provided by the laser
For simplicity we consider the absorption along a straight line parallel to the optical axis of the microscope.
C] is the angle between the optical axis of camera and the line connected from principal point of lens to marker center and [[theta].
Support for optical axis of Multiple Master (MM) fonts and the addition of a new API that works on the actual rendered width of a device.
Furthermore, better alignment of interferometer's optical axis is now possible, which has beneficial effects on measurement uncertainty.
Optimised with a fixed lens offset of 10:1, the lens aligns the bottom edge of the projected image with the optical axis.
Additionally, the use of a high precision optical axis adjustment technology that was developed for this 2-lamp system enables the mirror to automatically select the lamp using a control motor.
The slim textbook develops the matrix for the reflection at a spherical mirror, analyzes the sensitivity of an optical system to misadjustment, considers the effect of a rotation about the optical axis in an anamorphic system, and presents design approaches for several triplet systems.
instant position of the sensor optical axis with the characteristic point plane intersection "{x.
This optical, rather than mechanical, nature of the scanning process necessitates constant use of the system's scan lens at "off-axis" trajectories, an operating condition that introduces distortion of optical waves reaching the microscope as the scan axis departs from the microscope's optical axis.