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Measurement of Microscope Magnification

David H. Freeman

Open publisher page 5 citations

Abstract

The procedure of calibrating a ruled scale and of measuring the magnification of a visible light microscope is described. The measurement techniques include the use of: (1) a movable hairline micrometer, (2) an image-splitting ocular, (3) photoelectric scanning of photomicrographic plates, and (4) photoelectric scanning of the image plane. An empirical treatment of the magnification measurements, including the effects of optical distortion, is employed, so that the residual errors are assigned to the imperfections in the measuring screw plus the random contributions.

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What this paper is about

The procedure of calibrating a ruled scale and of measuring the magnification of a visible light microscope is described. The measurement techniques include the use of: (1) a movable hairline micrometer, (2) an image-splitting ocular, (3) photoelectric scanning of photomicrographic plates, and (4) photoelectric scanning of the image plane. An empirical treatment of the magnification measurements, including the effects of optical distortion, is employed, so that the residual errors are assigned to the imperfections in the measuring screw plus the random contributions.

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OpenAlex reports 5 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

The procedure of calibrating a ruled scale and of measuring the magnification of a visible light microscope is described. The measurement techniques include the use of: (1) a movable hairline micrometer, (2) an image-splitting ocular, (3) photoelectric scanning of photomicrographic plates, and (4) photoelectric scanning of the image plane. An empirical treatment of the magnification measurements, including the effects of optical distortion, is employed, so that the residual errors are assigned to the imperfections in the measuring screw plus the random contributions.

Key concepts: Magnification, Optics, Microscope, Distortion (music), Photoelectric effect, Materials science, Micrometer, Optical instrument

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