Autofocusing system for a microscope and method of using the sam

Details Autofocusing system for a microscope and method of using the sam Autofocusing system for a microscope and method of using the sam

1987-05-14

1989-02-07

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

350519, G01J 120

Patent

active

048033529

ABSTRACT:
A microscope with continuously or discontinuously variable objective magnification is provided with an autofocus system, the beam path of which passes through the objective and is directed out of the imaging beam path of the microscope between objective and eyepiece to at least one photo-electric detector means. At least one optical system is located or locatable in the beam path of the autofocus system which allows or causes the at least one image formed on the detector means to be altered in scale when a change in the objective magnification occurs. The at least one optical system may be a zoom system or a series of lenses or fixed lens systems arranged to be moved into the beam path of the focusing system. By a coupling mechanism, it is achieved that, upon an exchange of the objective or a change in the objective magnification, the focal length of the at least one optical system located or locatable in the beam path of the autofocus system is varied accordingly.

REFERENCES:
patent: 4595829 (1986-06-01), Neumann et al.
patent: 4620089 (1986-10-01), Schlichting et al.
patent: 4639587 (1987-01-01), Chadwick et al.
patent: 4687913 (1987-08-01), Chabin
patent: 4694151 (1987-09-01), Yoshimura

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