منابع مشابه
Basic principles of microscope objectives.
Microscope objectives are perhaps the most important components of an optical microscope because they are responsible for primary image formation and play a central role in determining the quality of images that the microscope is capable of producing. Objectives are also instrumental in determining the magnification of a particular specimen and the resolution under which fine specimen detail ca...
متن کاملCalibration of numerical aperture effects in interferometric microscope objectives.
The numerical aperture (N.A.) of a microscope objective can affect the measurement of surface profiles. Large N.A. objectives measure smaller heights than the actual values. An experiment to calibrate these effects on objectives with N.A.s of 0.1-0.95 is described using four traceable step height standards and a computer-controlled interferometric optical profiler utilizing phase-measurement in...
متن کاملA method for characterizing longitudinal chromatic aberration of microscope objectives using a confocal optical system
We describe a novel method of characterizing the longitudinal chromatic aberration of microscope objectives by recording a series of axial responses as a function of wavelength as a plane reflector is scanned through the focal region of a confocal microscope. Measurements are presented for a variety of objectives with differing degrees of correction. The use of the chromatic focal shift to meas...
متن کاملStudy Objectives
The main objectives of the study are to: ■ assess the number of illicit small arms in Kenya; ■ identify the sources and prevalence of small arms and their movement in and out of Kenya; ■ assess the capacity of various actors involved in small arms control and peace-building efforts in the country; ■ assess the role and use of information on illicit small arms and linkages to early warning and r...
متن کامل1 Objectives
1 Objectives The objective is to investigate continuous-time models of computation and the complexity thereof. Two complementary approaches will be followed. On one hand, at a more abstract level, the focus is on the theory of real recursive functions. The main objectives are: 1) clarify the algebraic properties of the relations between analog and standard notions of complexity; 2) find analog ...
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ژورنال
عنوان ژورنال: Photoniques
سال: 2021
ISSN: 1629-4475,2269-8418
DOI: 10.1051/photon/202110759