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18 Cards in this Set

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Angle of incidence
The angle formed between a ray of light striking a surface and the normal to that surface at the point of incidence
Angle of Reflection
The angle formed between the normal to a surface and the reflected ray. This angle lies in a common plane with the angle of incidence, and is equal to it.
Angle of Refraction
The angle formed between the reflected ray and the normal to the surface. This angle lies in a common plane with the angle of incidence.
Aperature
An opening or hole through which radiation or mater may pass. Aperture stop – A physical restraint that limits the diameter of the bundle of light allowed to pass through a lens
apochromatic
Describing a lens or optical system with very little chromatic aberration. In an apochromatic lens (also known as an apochromat) the chromatic aberration is completely cancelled out at three or more wavelengths, compared with two for a typical achromatic lens. Apochromats usually have at
least three optical elements, made from different types of glass
Beam
A bundle of light rays
Beamsplitter
An optical device for dividing a beam inot tow or more seperate beams
Binocular
An instrument having a pair of lenses, one for each eye that focuses on a single object as a magnifier
Chromatic aberration
The lens aberration resuting from the normal increase in the refractive index of all common materials toward the blue end of the spectrum
C-mount
This is an adapter used with various types of video or digital cameras. The C-mount adapter drops into the trinocular port of the microscope and has lenses built into it. The C-mount adapter is microscope-specific, meaning that the brand of the microscope and the brand of the C-mount adapter should match - this is because each C-mount adapter is created specifically for a microscope in order to
have the correct focal length for the camera. The C-mount adapter has threads on the end of it and connects directly to either a video or microscope digital camera.
Diopter
A unit of measurement used to describe the degree of refractive error with respect to nearsightedness, farsightedness, and astigmatism.
Eyepiece
Lens (or lens system) with which the eye observes the image formed by the microscope.  The eyepiece provides a magnification, a diopter correction, and an eyecup setting.
Field of View
Sometimes abrreviated FOV, this is the diameter of the circle of light that you see when looking into the microscope.  As the power increases, the field of view decreases.
Interpupilliary Adjustment
When using a stereo or binocular microscope, there must be an adjustment for the distance between the viewers eyes.
Intermediate Image
An image formed in space by a lens
Parfocal
This is a focus issue.  When changing from one viewing system or magnification to another, the new image should be either in focus or close enought so that you can refocus with only minor adjustments.   Most microscopes are parfocal.
Resolution
The ability of a lens system to show fine details of the object being observed
T-mount
A type of adapter used to mate still cameras (usually 35mm) to microscopes.  These are often used with SLR cameras and are used in combination with an SLR adapter for a microscope.