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 ?
perpendicular in the horizontal plane and tilted setting of the optical axis of the lens with respect to the staff in the vertical plane (Fig.
If you're going to attach an optic directly to the rail, you'll first need to put its optical axis about 2.
In the simplest case of light attenuation parallel to the optical axis, the intensity is subject to a 1st order ordinary differential equation which can easily be solved by Euler's method.
One of advantages of such arrangement is that the instrument to be checked is pointed to the reticule of the autocollimator, in such way ensuring the strict direction of the instrument's optical axis pointed to the infinity of the autocollimator axis.
then shifts the lens to correct the optical axis and repeats this detection and correction process about 4,000 times per second.
The another one, decentering distortion, is appeared by the misalignment of the optical axis and the center line of lens.
The angle between the optical axis of the light source and the RGB CCD camera is fixed at 45[degrees], the normal at the apex of the sample holder being the bisector of this angle.
Collimation: Aligning two optical axes so they are parallel, or aligning the optical axis of an instrument with its physical axis (as when zeroing a rifle with an optical collimator or checking barrel alignment on a binocular).
Each lens assembly was aligned passively to the same sensor to the same position within 2 microns in the optical axis using the physical characteristics of the parts for alignment.
All models use laser diffraction technology with a convergent laser beam in which the measuring cell is moved along the optical axis to adjust the measuring range without the need to change the lens.
Modeling showed asymmetric fillets, on opposite sides, tilting the optical axis of the component by up to a degree for a couple of degrees centigrade of temperature change.
Often called the "rising sun" pattern, it rotates around the optical axis of the seeker.