Patent · US Expired

Imaging optical system for direct phase-angle measurement of radiation

US6590668B1 · kind B1 · utility

4Cited by

5References

27Claims

0Family size

Assignee

STEINBICHLER OPTOTECHNIK GMBH · DE

Inventors

Rainer Huber · Piding, DE
Junli Sun · Raubling, DE
Bernd Leitner · Neubeuern, DE
Hans Steinbichler · Neubeuern, DE

Key dates

Filing date	Dec 7, 1999
Grant date	Jul 8, 2003
Priority date	—
Expiry date	Dec 7, 2019

Classification

Technology area (CPC G)Physics
CPC primaryG01J9/0215
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method serves the direct phase-angle measurement of radiation, in particular of light radiation which is reflected from a body. The body is exposed to coherent radiation. The radiation reflected from the body is imaged by an imaging optical system (6) in an image plane in which a sensor is located. A reference radiation generated in accordance with the shearing method is superimposed on the sensor. The phase of the radiation from the body is determined from the measurement signals of the sensor. To improve such a method, the imaging optical system (6) possesses a diaphragm (11) having one or two apertures (12, 13) (FIG. 2a).

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