Microscopy components, namely, microscopes, microscope objectives, and components for use with microscopes, namely, illumination devices, operating microscope stands, sample holders in the nature of microscope slides and plates in the nature of cover glass; containers for microscope slides; biochips for research or scientific purposes; semiconductor chips; dna chips; silicon chip; scientific instrumentation for measuring particle number, particle size and particle size distribution in liquid, not for medical use, namely, particle counters; apparatus and instruments for physics, namely, sample holder for electron microscope, namely, liquid cell; microscopes and parts thereof, namely, microscope stage in the nature of a sample holder; components and subsystems for optical sources and sensors, namely, optical filters, tunable electric and optical sensors, laser modules being used as a particle filter, and optical microfluidic components and cells in the nature of flow cells, liquid cells, biochips, microfluidic chips, and microwell plates, all in the nature of sample holders for microscopes, not for medical purposes; microelectromechanical devices, namely, microfluidic chipsets