ANGULAR APERTURE Meaning and
Definition
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Angular aperture refers to the maximum angle over which an optical system, such as a lens or an optical instrument, is capable of accepting or emitting light. It is a measure of the extent to which the system can gather or emit light rays coming from, or heading towards, a certain direction.
Angular aperture is typically expressed in radians or degrees and is determined by the size and shape of the lens or aperture as well as the focal length of the optical system. A wider angular aperture indicates a greater capacity to gather or emit light rays, resulting in a larger field of view and potentially brighter images. Conversely, a narrower angular aperture restricts the range of accepted or emitted light, leading to a reduced field of view and possibly dimmer images.
In photography, the angular aperture is commonly referred to as the lens aperture or f-number, which represents the ratio of the focal length to the diameter of the lens aperture. In this context, a smaller f-number corresponds to a wider angular aperture and vice versa. Changes in angular aperture have direct implications on depth of field, as wider apertures can create a shallower focus, while narrower apertures result in a deeper focus.
Overall, angular aperture is a critical parameter in optical systems as it governs the amount of light entering or exiting the system, which ultimately influences image quality, brightness, and depth of field.
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The diameter of the object glass of a microscope measured by the angle made by lines from the periphery of the objective to the focus.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for ANGULAR APERTURE
- zngular aperture
- sngular aperture
- wngular aperture
- qngular aperture
- abgular aperture
- amgular aperture
- ajgular aperture
- ahgular aperture
- anfular aperture
- anvular aperture
- anbular aperture
- anhular aperture
- anyular aperture
- antular aperture
- angylar aperture
- anghlar aperture
- angjlar aperture
- angilar aperture
- ang8lar aperture
- ang7lar aperture
Etymology of ANGULAR APERTURE
The word "angular" can be traced back to the Latin word "angulus", meaning "corner" or "angle". It was later adopted into Old French as "angulier" and then into Middle English as "angular". The word "aperture" has its roots in the Latin word "apertūra", meaning "opening" or "gap". Both words come together to form the term "angular aperture", which refers to the measurement of the maximum angle where light can enter an optical system, such as a camera or a telescope.
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