Autofocusing arrangement for a stereomicroscope which permits au

Details Autofocusing arrangement for a stereomicroscope which permits au Autofocusing arrangement for a stereomicroscope which permits au

1992-09-24

1994-02-22

Messinger, Michael

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

359376, G01J 120

Patent

active

052889874

ABSTRACT:
The invention relates to a high-precision autofocusing arrangement for a stereomicroscope wherein a bar-shaped marking is projected via a cylinder optic on an object. The imaged bar-shaped marking is at least in one dimension less or equal to the resolution of the viewing beam path. A region of the objective not used optically is selected for projection as the pass-through pupil.

REFERENCES:
patent: 4356392 (1982-10-01), Wittekock et al.
patent: 4412127 (1983-10-01), Imai
patent: 4447717, Nohda
patent: 4516840 (1985-05-01), Nakahashi et al.
patent: 4843228 (1989-06-01), Nakamura
patent: 4912496 (1990-03-01), Tamada et al.

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