Close-up lens assembly incorporating a photo-ranging system

Details Close-up lens assembly incorporating a photo-ranging system Close-up lens assembly incorporating a photo-ranging system

G - Physics

03

B

G03B 19/02 (2006.01) G03B 13/22 (2006.01) G03B 15/05 (2006.01) G03B 19/07 (2006.01)

Patent

CA 2138908

A plurality of fixed focus exposure lenses are mounted in a turret for manual selection of a desired focus. Each exposure lens in the turret is combined with a pair of ranging lenses for movement therewith which direct light beams to converge at the sharpest subject focus distance of the exposure lens.

Une série de lentilles d'exposition à foyer fixe est montée dans une tourelle pour permettre la sélection manuelle d'un foyer désiré. Chaque lentille d'exposition dans la tourelle est combinée de façon solidaire à une paire de lentilles de télémétrie qui dirigent des faisceaux lumineux afin qu'ils convergent à la distance foyer-sujet la plus précise possible de la lentille d'exposition.

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