| focal point |
A point on the optical axis of a lens at which rays from a distant object point meet.
출처: www12.mawebcenters.com/coltslaboratories/gloss.ivn...
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| focus |
Position in which rays of light from a lens converge to form a sharp image.
출처: www.vistek.ca/glossary/default.asp
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| focal length |
The distance, usually given in millimeters, between the optical center of a lens and the point at which rays of light from objects at infinity are brought to focus. In general, the greater the focal length, the smaller and more magnified the part of the scene, it includes in the picture frame.
출처: www.vistek.ca/glossary/default.asp
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| focal plane |
The plane on which the image of a subject is brought to focus behind the lens. To produce a sharp picture, the lens must be focused so that this place coincides with the plane on which the film sits. Also called the film plane.
출처: www.vistek.ca/glossary/default.asp
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| focal point |
The point on the optical axis where light rays form a sharp image of a subject. An ideal lens would allow light rays to diverge from a subject parallel to the optical axis and converge to a point when they pass through the lens.
출처: www.vistek.ca/glossary/default.asp
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