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An image intensifier or image intensifier tube is a vacuum tube device for increasing the intensity of available light in an optical system to allow use under low-light conditions, such as at night, to facilitate visual imaging of low-light processes, such as fluorescence of materials in X-rays or gamma rays (X-ray image intensifier), or for conversion of non-visible light sources, such as ...
Concept sketch of David Dunlap Observatory. The DDO owes its existence almost entirely to the efforts Clarence Chant. [3] Chant had not shown an early interest in astronomy, but while attending University College, University of Toronto, he became interested in mathematics and physics, eventually joining the university as a lecturer in physics in 1892. [4]
In optics, an image-forming optical system is a system capable of being used for imaging. The diameter of the aperture of the main objective is a common criterion for comparison among optical systems, such as large telescopes. The two traditional optical systems are mirror-systems and lens-systems .
Brampton ON 43°41′13″N 79°45′54″W  /  43.687°N 79.765°W  / 43.687; -79.765  ( Brampton GO Station and VIA Station, formerly a Canadian National Railways Federal ( 4567 )
Medical optical imaging is the use of light as an investigational imaging technique for medical applications, pioneered by American Physical Chemist Britton Chance. Examples include optical microscopy , spectroscopy , endoscopy , scanning laser ophthalmoscopy , laser Doppler imaging , and optical coherence tomography .
Cross-section of relay lens assembly - System 1 Cross-section of relay lens assembly - System 2 Image-erecting optical system for astronomical telescopes (erecting eyepiece) In optics, a relay lens is a lens or a group of lenses that receives the image from the objective lens and relays it to the eyepiece.
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