Conjugate Planes | Conjugate Planes
Parole chiave: Bertrand lens, CFI60 optical system, finite optical system, infinity optical system, artefacts
Definizione:A set of planes in an image forming system that are optically linked and whose images are superimposed at the detector / eye
TECHNOLOGY:
There are two sets of principal conjugate focal planes that occur along the optical pathway through the microscope:
1.the microscope aperture or illumination conjugate set,
2 the field or image-forming conjugate set (see table and figure).
| Conjugate focal planes | |
| Aperture / illuminating | Field / image-forming |
| Microscope exit pupil: eye iris diaphragm, Ramsden disc, and eyepoint | Retina of the eye, or camera image plane |
| Microscope objective rear focal plane (objective rear aperture) | Intermediate image plane (eyepiece fixed diaphragm) |
| Condenser aperture diaphragm (microscope condenser front focal plane) | Specimen plane (object plane) |
| Lamp filament | Field diaphragm (field stop) (Köhler diaphragm) |
During normal observation using the eyepieces, the conjugate set of object or field planes can be simultaneously viewed when the specimen is in focus (the orthoscopic image). Observing the other conjugate set of aperture or diffraction planes requires the ability to focus on the rear aperture of the objective using an eyepiece telescope in place of an ocular, or a built-in Bertrand lens. The resulting image is termed a conoscopic image. Light rays focused in one set of conjugate planes are nearly parallel when passing through the other set of conjugate planes (see figure). The reciprocal relationship between the two determines how the two paths of light interact in forming an image.
APPLICATIONS:
An understanding of the location and image-forming function of each of the conjugate image and aperture planes is useful in solving problems that may arise during imaging. It is also necessary for proper placement and use of filters, stops, phase rings, DIC prisms, and other optical components.
IMAGE: Courtesy of
RECOMMENDED SYSTEM: MicroscopyU
Please consult your local Nikon representative for advice on your imaging needs
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