Software application: cylindrical mirror design
Cylindrical mirror concept: it is composed of a cylinder and a plane, including plane-concave and plane-convex lens.
Optical properties: light passing through the axial meridian (the vertical direction in the figure) does not change the concentration and divergence.
Light passing through the dioptric meridian (the horizontal direction in the figure) changes in concentration and divergence.
Application: cylindrical mirrors are generally used to focus incident light onto a line or to change the aspect ratio of an image.A cylindrical mirror has a cylindrical surface that allows incoming light rays to focus on a dimension and stretch the image.The focal length of cylindrical mirror can be negative or positive, suitable for laser line generation or deformation beam shaping, ring laser output.
Use cylindrical mirror generator
The parameters entered in the dialog are clear, but a few things are clear:
Parameters for a surface can be entered as radius or curvature, in both cases, a value of 0 should be applied to a flat surface.
The thickness is the center thickness between the two surfaces on the axis.
Only materials that exist in the "materials" folder of FRED files are available as substrate and infiltrating materials options
"Bent crankshaft" means the shaft along the curved surface.For example, if y is chosen to bend the crankshaft, the light will concentrate in the y direction, but not in the x direction.
Just like an axisymmetric lens, a cylindrical mirror is assigned a "transmission" coating and a "transmission mirror" ray tracing property.
An alert appears in the output window if any of the following conditions are encountered:
Elements with the same name already exist in the geometry folder.
It is generally not recommended that two components have exactly the same name.
The semi-aperture of a surface is larger than its radius.
In this case, the surface is created depending on its radius.
The semi-aperture of the surface is very close to its radius (less than radius, but larger than 0.975* radius)
When the ring surface is created, the ring surface will not render correctly if the edges extend beyond the 0.975* radius using the defined surface subdivision Settings.Improving surface fineness will improve rendering.
This problem affects only visual representations, not light tracing and analysis
Edge thickness is less than 0.
Notice that when we encounter these warning situations, the cylindrical mirror is still created, although it may be nonphysical.