Prismatic Cylindrical Mirror

Focal length

Definition: The distance from the point where parallel rays converge or diverge after passing through the cylindrical mirror to the center of the cylindrical mirror.

Function: The focal length determines the focusing or diverging ability of the cylindrical mirror. The shorter the focal length, the stronger the focusing or diverging effect.

Radius of curvature

Definition: The radius of the circle corresponding to the degree of curvature of the cylindrical mirror surface.

Function: The smaller the radius of curvature, the more curved the cylindrical mirror surface is, and the stronger the refraction effect on light.

Cylinder power

Definition: It describes the strength of the cylindrical mirror’s ability to refract light and is often used to correct astigmatism.

Function: The higher the power, the stronger the refraction effect on light in a certain direction.

Axis

Definition: The direction of the cylindrical mirror, usually expressed in degrees (e.g., 0° - 180°).

Function: When correcting astigmatism, the axis determines the direction of correction.

Aperture

Definition: The diameter of the cylindrical mirror.

Function: The larger the aperture, the larger the field - of - view that the lens can cover. However, at the same time, the weight and volume of the lens may also increase.