optical axis


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Related to optical axis: focal length, visual axis

optical axis

The imaginary line passing through the midpoint of a lens, mirror, or system of such elements and on which lies the focal point of parallel paraxial rays.

Optical Axis

 

The optical axis of a lens or a concave or convex mirror is the straight line that is the axis of symmetry of the refracting surfaces of the lens or of the reflecting surface of the mirror. It passes perpendicularly through the center of these surfaces. Optical surfaces that have such an axis are said to be axially symmetric. The optical axis of an optical system is the common axis of symmetry of all the lenses and mirrors in the system.

optical axis

[′äp·tə·kəl ′ak·səs]
(anatomy)
An imaginary straight line passing through the midpoint of the cornea (anterior pole) and the midpoint of the retina (posterior pole).
(optics)
A line passing through a radially symmetrical optical system such that rotation of the system about this line does not alter it in any detectable way.

optical axis

An imaginary line drawn from the geometric center of a film to the center of a lens. It may project beyond the lens. Also called a lens axis and a camera axis
References in periodicals archive ?
c], the phase difference measurements on the optical axis are different to the value predicted by Babinet's principle until a distance of propagation 1.
PCO development, PCO duration, need for Nd:YAG laser therapy due to optical axis obscuration and follow-up time were recorded at follow-up visits.
perpendicular in the horizontal plane and the horizontal setting of the optical axis of the lens with respect to the staff (Fig.
Thirdly, the global searching optimization algorithm based on the confinement of the uniformity along the optical axis and FWHM in the focal plane is designed, which allows fast searching speed compared with traditional searching criteria.
Let spacing h, length l parallel line, with the angle of the optical axis [theta], as is shown in Figure 2, in the plane perpendicular to the lens, l can be decomposed a rectangle in the direction of the optical axis direction, and the length of the rectangle is l cos [theta], the height of the rectangle is h.
If an aspheric lens were to be decentred, the vertex of the aspheric surface no longer occupies the position assumed when originally designing the lens and, as such, the aspheric surface will no longer occupy a position in which symmetry occurs for ocular rotations away from the optical axis.
On most scoped bolt actions, depending on the objective lens diameter and the amount of stock drop, the optical axis averages about 1.
The two foci used in the M5 test (visible through the alignment telescope) marked the mirror's optical axis and so M5 could be adjusted in tip/tilt and decentre, with feedback from the Faro, until it was lined up with the optical axis of M2.
The parts in this product are mounted flat on the system's XY stage and the optical axis is vertical (the lens is looking down on the components), according to the Canadian developer of software and systems for automated visual inspection and high-accuracy measurements.
In our setting "reconstruction" has the following meaning: The true density of the fluorophores in a xy-plane perpendicular to the optical axis and of distance z from the microscopic lense is estimated using the data of the set of CLSM-slices which are closer to the lense.
The current 3D camera module developed by Sharp incorporates functions to process the image data output by the left and right cameras, including Color Synchronizing Processing to adjust color and brightness, Timing Synchronizing Processing to synchronize the timing of the video signals, and Optical Axis Control Processing to correct positioning.
Removing the vitreous gel and hemorrhage clears the optical axis of the eye, and enables the surgeon to approach the retina and the vitreoretinal interface directly.