What does entrance pupil mean?
Definitions for entrance pupil
en·trance pupil
This dictionary definitions page includes all the possible meanings, example usage and translations of the word entrance pupil.
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Entrance pupil
In an optical system, the entrance pupil is the optical image of the physical aperture stop, as 'seen' through the front of the lens system. The corresponding image of the aperture as seen through the back of the lens system is called the exit pupil. If there is no lens in front of the aperture, the entrance pupil's location and size are identical to those of the aperture. Optical elements in front of the aperture will produce a magnified or diminished image that is displaced from the location of the physical aperture. The entrance pupil is usually a virtual image: it lies behind the first optical surface of the system. The geometric location of the entrance pupil is the vertex of the camera's angle of view and consequently its center of perspective, perspective point, view point, projection centre or no-parallax point. This point is important in panoramic photography, because the camera must be rotated around it in order to avoid parallax errors in the final, stitched panorama. Depending on the lens design, the entrance pupil location on the optical axis may be behind, within or in front of the lens system; and even at infinite distance from the lens in the case of telecentric systems.
Numerology
Chaldean Numerology
The numerical value of entrance pupil in Chaldean Numerology is: 2
Pythagorean Numerology
The numerical value of entrance pupil in Pythagorean Numerology is: 1
Translations for entrance pupil
From our Multilingual Translation Dictionary
- alumno de entradaSpanish
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"entrance pupil." Definitions.net. STANDS4 LLC, 2024. Web. 30 Apr. 2024. <https://www.definitions.net/definition/entrance+pupil>.
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