| 摘要 |
A disposable low cost laboratory slide for measuring particle concentration has a base plate in the form of a standard microslide whose thickness is compatible with microscope optics. Tapes of precise thickness formed of chemically inactive material and possessing mechanical stability are adhesively bonded to the base plate in spaced relationship, the thickness of the tapes establishing a precision depth for a volumetric slide chamber. A thin coverslip of standard thickness overlies the tapes and is bonded thereto, the thickness of the coverslip also being compatible with microscope optics. The disposable slide is used in a simple optical system with magnification wherein the field of interest is focused on a precision graticle or screen enabling precise measurement of the area of the slide volumetric chamber, following which the precise volume of the chamber can be determined and the concentration of particles in a specimen within the chamber calculated with precision.
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