Projection-type optical apparatus

Details Projection-type optical apparatus Projection-type optical apparatus

1990-12-24

1992-08-11

Cuchlinski, Jr., William A.

Optics: image projectors

Miscellaneous

353101, 355 30, 355 53, 355 55, G03B 2734

Patent

active

051373491

ABSTRACT:
In a projection-type optical apparatus in which a projection optical system projects an image of an object upon a substrate, a position detecting sensor mechanically connected to the projection optical system detects the position of the projection optical system relative to the substrate along the optical axis of the projection optical system. A displacement measuring device measures relative displacement between the position detecting sensor and the projection optical system along the optical axis. The substrate is brought into coincidence with an optimum image forming plane of the projection optical system on the basis of the position detected by the position detecting sensor and the displacement measured by the displacement measuring device.

REFERENCES:
patent: 4601560 (1986-07-01), Isohata et al.
patent: 4650983 (1987-03-01), Suwa
patent: 4666273 (1987-05-01), Shimizu et al.
patent: 4668077 (1987-05-01), Tanaka
patent: 4704020 (1987-11-01), Murakami et al.
patent: 4708465 (1987-11-01), Isohata et al.
patent: 4714331 (1987-12-01), Oda et al.
patent: 4801977 (1989-01-01), Ishizaka et al.
patent: 4952970 (1990-08-01), Suzuki et al.

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