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Online text: www.microscopyu.com/microscopy-basics/infinity-optical-systems

MicroscopyU educational article issued by Nikon Instruments Inc.. The displayed Contributing Authors heading is empty; no personal author or publication date is established. Footer copyright is distinct from article publication.

Cited passages: finite-system introduction; Figure 2(a–b); parallel bundles, tube lens and magnification discussion before Figure 3.

By Nikon Instruments Inc..

Publisher: Nikon Instruments Inc., MicroscopyU.

Online text: www.microscopyu.com/techniques/confocal/introductory-confocal-concepts

Cited passages: Fig. 2 discussion: focused-light sections rather than physical sectioning; Introductory Confocal Concepts, opening paragraphs and Fig. 2: out-of-focus fluorescence and optical sections.

By Thomas J. Fellers and Michael W. Davidson.

Online text: www.microscopyu.com/microscopy-basics/linear-measurements-micrometry

MicroscopyU educational article published by Nikon Instruments Inc.. The Contributing Authors byline names both authors; no article publication date is established.

Cited passages: Stage Micrometers; Eyepiece Reticle Calibration, Figure 4 and procedure; Conclusions, line-edge errors and digital calibration at identical pixel resolution.