Endoscope image pickup unit for picking up magnified images...

Details Endoscope image pickup unit for picking up magnified images... Endoscope image pickup unit for picking up magnified images...

2011-04-19

2011-04-19

Smith, Philip R (Department: 3779)

Surgery

Endoscope

Having imaging and illumination means

Reexamination Certificate

active

07927273

ABSTRACT:
An endoscope image pickup unit is disclosed that captures magnified images of an object. An objective optical system of the image pickup unit includes, in order from the object side, a front lens group having positive refractive power and an aperture stop. Various conditions are satisfied so as to provide an observation scale factor in the range of about 200 to 2000 so that cellular details can be observed, as in a microscope, while keeping the objective optical system sufficiently compact for insertion within a patient. Also disclosed is a focus adjustment apparatus and method for the endoscope image pickup unit, and a focus range check apparatus and method for the endoscope image pickup unit.

REFERENCES:
patent: 4704007 (1987-11-01), Landre et al.
patent: 5976075 (1999-11-01), Beane et al.
patent: 6616347 (2003-09-01), Dougherty

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