MicroscopyEducation
Figure 1: (a) An overview of the L-eye mobile microscope with an objective of 2.9mm focal length. (b) A whole view of the L-eye microscope equipped with a smart- phone (Huawei P10 Plus). (c) A conventional education-use microscope (ECLIPSE E100) that was mounted with a smartphone for image capture was the system used as a control. It was compared with the L-eye mobile microscope. (d) A schema of the side view of the L-eye microscope. The mobile microscope lens unit is a combination of a sample support made of a thin plastic disk with a female-screw in the center hole and a lens support holding a compound lens in the center with a male-screw outside. The screw mechanism enables focusing through the rotation of the thin-disk-attached light stand, which holds a LED.
for the rat was approved by the Institutional Animal Care and Use Committee (Protocol Number: #AP16082) and carried out according to the Fujita Health University Animal Experimen- tation Regulations. Microscopy observations. Two microscope systems
were used for observation of the specimens. The first was a Leeuwenhoek-type mobile microscope (L-eye mobile microscope, Life is Small Company, Japan) (Figure 1), which includes a combination of an external lens made with a compound lens and a Huawei P10 Plus smartphone (Huawei P10 Plus, China). The other was a conventional microscope (ECLIPSE E100 microscope, Nikon, Japan) with the same Huawei P10 Plus smartphone directly attached
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to the eyepiece of the ECLIPSE E100. The mobile Huawei P10 Plus has three cameras: two back-facing cameras—one monochrome and one color—and a front-facing camera. While the color back-facing camera was mounted to the conventional microscope (ECLIPSE E100 microscope), the front-facing camera was used for the mobile microscope. The reason different cameras had to be used for the two microscope systems can be seen in Figures 1b and 1c, where the front-facing camera is an integrated part of the mobile microscope and the back-facing camera is that of the smart- phone-mounted conventional microscope. Specifications of the lenses tested are listed together with the other performance data in Table 1. Magnification of the
www.microscopy-today.com • 2020 July
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