Hopkins rod-lens telescope

Hopkins rod-lens telescope

(hop'kinz),
an endoscopic telescope in which the air-containing spaces between the conventional series of lenses are replaced with glass rods with polished ends separated by small "air-lenses." This system transmits more light, yields greater magnification, and provides greater depth and breadth of field than conventional lens systems.

Hopkins rod-lens tel·e·scope

(hop'kinz rod'lenz tel'ĕ-skōp)
An endoscopic telescope in which the air-containing spaces between the conventional series of lenses are replaced with glass rods with polished ends separated by small "air-lenses." This system transmits more light, yields greater magnification and provides greater depth and breadth of field than conventional lens systems.
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He was then placed in suspension, and his subglottic region was visualized with a 0[degrees] Hopkins rod-lens telescope.