Patent · US Expired

Method and apparatus for detecting the distance between an object and an ultrasonic objective

US4645937A · kind A · utility

4Cited by

1References

8Claims

0Family size

Assignee

Ernst Leitz Wetzlar, GmbH · DE

Inventors

Abdullah Atalar · Ankara, TR
Herbert Fischbach · Wetzlar, DE
Dieter Huelsmann · Solms, DE

Key dates

Filing date	Nov 13, 1984
Grant date	Feb 24, 1987
Priority date	—
Expiry date	Nov 13, 2004

Classification

Technology area (CPC G)Physics
CPC primaryG01S17/46
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Method and apparatus for detecting the distance between an ultrasonic objective and an object to be imaged in order to prevent contact between the two. For this purpose, light rays, after entering into an immersion means (water) between the objective and the object, being reflected by the object, and emanating from the immersion means are fed through the ultrasonic objective to a photo-receiver and converted into electric signals. The front face of the lens body of the ultrasonic objective is provided with an opaque ring zone. This arrangement makes it possible simultaneously to illuminate the object.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.