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7 terms
Photonics Dictionary: F
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focal point x
F x
focal point
That point on the optical axis of a lens, to which an incident bundle of parallel light rays will converge.
focal length
The focal length of a lens is the distance between the lens's optical center (or principal point) and the image sensor or film when the lens is focused at infinity. In simple terms, it is the...
focal plane
A plane (through the focal point) at right angles to the principal axis of a lens or mirror; that surface on which the best image is formed.
focus
1. The focal point. 2. To adjust the eyepiece or objective of a telescope so that the image is clearly seen by the observer. 3. To adjust the camera lens, plate, or film holder so that the image is...
Fresnel lens
A Fresnel lens is a type of optical lens that consists of a series of concentric grooves or steps carved into a flat, thin piece of transparent material, typically plastic or glass. This design...
front focal length
->
focal length
The focal length of a lens is the distance between the lens's optical center (or principal point) and the image sensor or film when the lens is focused at infinity. In simple terms, it is the...
front vertex focal distance
The distance between the front focal point and the vertex of the front surface.
Photonics Dictionary
F
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