## What is spot diagram in optics?

Spot diagrams are graphs that show where rays from a point object will fall on the image surface (they must fall close together if the lens is to form a good image).

What is spot diagram in zemax?

In Zemax and other optical design codes, spot diagrams are maps of where rays intersect the image plane after passing through the pupil with a chosen grid pattern. A spot diagram can be considered to be an image of a point source.

What is ray fan?

Beside spot diagrams, ray-fan plots are often used to visualize aberrations in a system. For a fixed field point at height y, the wavefront error, transverse, or longitudinal ray error are plotted against the tangential or sagittal pupil coordinate yp and xp, respectively.

### What is a ray diagram?

A ray diagram is a diagram that traces the path that light takes in order for a person to view a point on the image of an object. On the diagram, rays (lines with arrows) are drawn for the incident ray and the reflected ray.

What is point spread function in image processing?

The ideal point spread function (PSF) is the three-dimensional diffraction pattern of light emitted from an infinitely small point source in the specimen and transmitted to the image plane through a high numerical aperture (NA) objective.

What is transverse ray?

In physics, a transverse wave is a wave whose oscillations are perpendicular to the direction of the wave’s advance. This is in contrast to a longitudinal wave which travels in the direction of its oscillations.

#### What is a point spread function in optics?

The point spread function (PSF) describes the response of an imaging system to a point source or point object. A more general term for the PSF is a system’s impulse response, the PSF being the impulse response of a focused optical system.

What is coma in lenses?

Coma is a complex aberration that affects only light rays from a point that pass through the lens at an angle. With coma, the rays don’t refocus to a point, they flare out from the point (Figure 9). This makes points of light look like a comet with a blurred tail, hence the name.

What causes aberration?

aberration, Deviation of light rays by lenses or curved mirrors which causes the images to be blurred. Spherical aberration occurs because curvature in a lens or mirror causes rays falling on the outer edges to be brought to a focus at a different point than those falling on the middle.

## How many types of ray diagrams are there?

6 types of ray diagrams for concave mirror with namesâ€‹

What is a good point spread function?