Photometer tube for microscopes
AssigneeCarl-Zeiss-Stiftung
InventorsBernd Faltermeier, Martin Laudenberger
Life of this patent
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Abstract
A photometer tube for a microscope contains several switchable reflectors (5, 11). By the appropriate use of these, the ray path (c) for the back-illuminated measuring field stop (7) is reflected out of the photometry ray path (b) and is conducted to a second image inlet (32) of a beam splitter prism or prism slide. Various switchable elements (mirrors 5 and 11; stop 4; prism 2/22) in the tube are electrically driven and are centrally actuated from a control unit.
Claims6
A photometer tube for a microscope, said photometer tube including prism means having a first image inlet and a second image inlet, a measuring field stop, means providing a back-illumination ray path for back-illumination of said measuring field stop, means for directing light from a microscope objective into said first image inlet of said prism means, said prism means including means for splitting light entering said first image inlet into a viewing ray path (a) and a photometry ray path (b), means for reflecting an image of said measuring field stop into said viewing ray path, reflection of said image of said measuring field stop being along a ray path extending in part coaxial to an axis of said photometry ray path (b), and a first switchable reflector (5) effective in one position to separate a portion of said ray path of said measuring field stop from said photometry ray path and to direct it along a ray path (c) to said second image inlet (32) of said prism means.
Dependencies are inferred from the claim text.