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Magnification. The amount of a scene that will fit into the image area of a particular size film depends on the focal length of the lens being used. An image ...
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To prevent oxidation, Thorlabs recommends using these ND filters at temperatures below 100°C. To achieve the best performance, light should be incident on the ...
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These industrial grade kinematic optic mounts offer exceptional performance with a wide variety of flexible options. Our IM_._ series mounts use precision 80TPI or 100TPI adjustment screws for excellent resolution and feel in the hand. The solid 3/8-inch thick aluminum back plate offers mounting options for right or left-hand compatibility. These mounts use a full "L" cutaway back for maximum clear aperture. The IM_._C3 versions have a cutaway front face to optimize tight beam layouts and are available in right-hand or left-hand versions.
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In most cases, the eyepiece field diaphragm opening diameter determines the view field size. The field size in the specimen plane is then defined as the field number divided by the magnification of the objective:
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Nikon offers a range of eyepiece options featuring magnification and field of view combinations tailored towards a variety of applications.
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The Eclipse Ti2 inverted microscope delivers an unparalleled 25mm field of view (FOV) that revolutionizes the way you see.
The diameter of the view field in an optical microscope is termed the field number and represents the diameter of the field measured in millimeters at the intermediate image plane. This interactive tutorial explores the effect of varying the field of view size on the viewable specimen area.
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If an auxiliary lens is inserted between the objective and eyepiece, the magnification factor of this lens should also be employed in the equation by multiplication with the objective magnification (prior to the division operation). Although the field number is usually limited by the magnification and field diaphragm (stop) size of the eyepiece, there is clearly a limit that is also imposed by the design of the objective lens system. In early microscope objectives, the maximum usable field diameter tended to be about 18 millimeters or considerably less, but with modern plan apochromats and other specialized flat-field objectives, the maximum usable field can sometimes exceed 26 millimeters. Correspondingly, the field of view through microscope camera ports has risen in step with larger objective field numbers and larger camera sensors. The Nikon Eclipse Ti2 inverted microscope in particular offers a 25mm field of view through the camera ports.
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Electromagnetic waves are polarized if their electric field vectors are all in a single plane…
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The tutorial initializes with a randomly selected specimen visible in the virtual microscope viewport and the field number set to a value of 20. Use the Field of View slider to adjust the field size between 10 and 28 millimeters, and note how the viewable specimen area increases or decreases with the field number. After viewing a specimen, use the Choose A Specimen pull-down menu to select another specimen.
World-class Nikon objectives, including renowned CFI60 infinity optics, deliver brilliant images of breathtaking sharpness and clarity, from ultra-low to the highest magnifications.
John C. Long and Michael W. Davidson - National High Magnetic Field Laboratory, 1800 East Paul Dirac Dr., The Florida State University, Tallahassee, Florida, 32310.