公开(公告)号：DE10321806A1

公开(公告)日：2004-12-30

申请号：DE10321806

申请日：2003-05-14

Applicant: SCHROFF GERHART ,  STETTER MICHAEL

Inventor： SCHROFF GERHART ,  STETTER MICHAEL

IPC: G01N21/17 ,  G01N21/41

Abstract: Recognizing foreign gas in optical imaging and/or beam guiding systems (10) comprises using a protective gas in an investigative volume (3) which is subjected to an intensity-modulated electromagnetic analysis wave field (4'). During the absorption or frequency amounts of the analysis wave field using the photo-acoustic effect a photo-acoustic signal (5) is produced to recognize the impurities and/or foreign gases. An independent claim is also included for an arrangement for recognizing foreign gas in optical imaging and/or beam guiding systems.

公开(公告)号：DE19826790A1

公开(公告)日：1999-12-23

申请号：DE19826790

申请日：1998-06-16

Applicant: STETTER MICHAEL ,  SCHROFF GERHART

Inventor： STETTER MICHAEL ,  SCHROFF GERHART

IPC: G01M3/20 ,  G01M3/38 ,  G01M3/04 ,  G01N21/61

Abstract: A test volume (1) is so formed, that by taking the test volume in the vicinity of the object (6) under test or a movement of the test volume, gas from the vicinity of the object arrives in the test volume. The detector signal (11') is measured and evaluated, as a measure for the test gas concentration in the test volume or for the size of a leak (7). An Independent claim is included for an arrangement for implementing the method.

公开(公告)号：DE4415852A1

公开(公告)日：1995-11-09

申请号：DE4415852

申请日：1994-05-05

Applicant: SCHROFF GERHART ,  STETTER MICHAEL

Inventor： SCHROFF GERHART ,  STETTER MICHAEL

IPC: G01M3/22 ,  G01M3/24 ,  G01M3/20 ,  G01M3/16 ,  G01M3/32

Abstract: The method involves using a test-chamber (5), a pressure sensor (8) and a gasiform test fluid (9,10). The object to be treated is placed in the test-chamber under raised pressure monitored by the pressure sensor. It is then bombarded with the gasiform test fluid. A radiation source (1) emits an electromagnetic or laser beam (2) which enters through a window (4), passes through the object and then through a further window (6) to an analyser (7).The frequency-stabilised beam detects the pressure fluctuation caused by the leaking of the test fluid. A resonance frequency analyser in the test chamber may be used to pick up the modulation of the incoming electromagnetic beam caused by the pressure-fluctuation created by the emission of the test fluid. This can be converted to an acoustic signal.

公开(公告)号：DE4344076A1

公开(公告)日：1995-06-29

申请号：DE4344076

申请日：1993-12-23

Applicant: SCHROFF GERHART ,  STETTER MICHAEL

Inventor： SCHROFF GERHART ,  STETTER MICHAEL

IPC: A61B3/04 ,  A61B3/103 ,  A61B3/14 ,  G01M11/02 ,  G01P3/36 ,  G01B11/14 ,  A61B3/10 ,  G01B9/02 ,  G01M11/00 ,  G01P3/64

Abstract: An apparatus and method for the optical determination of object distance and velocity or which can alternatively be used to analyse the imaging qualities of an optical system e.g. the human eye employs a laser lightsource (1) to illuminate (2) a point (4) on the object surface (3). The dispersion cone (11) of returned and scattered rays of varying phase and spatial distribution impinges on a double aperture diaphragm (6) and the two emergent beams (14,15) are brought to a focus by the lens (7) to fall together on a photorespective image sensor (8) e.g. a CCD line or matrix camera in the region (9) thereby creating an interference pattern. By examining the type and dimensioning of the pattern the object parameters are derived or corrective ophthalmology undertaken.

公开(公告)号：DE59102907D1

公开(公告)日：1994-10-20

申请号：DE59102907

申请日：1991-06-27

Applicant: SCHROFF GERHART ,  STETTER MICHAEL

Inventor： SCHROFF GERHART ,  STETTER MICHAEL

IPC: G01F1/66 ,  G01P5/00 ,  G01R23/00 ,  G01R23/02 ,  G01R23/14

公开(公告)号：DE4306232A1

公开(公告)日：1993-09-02

申请号：DE4306232

申请日：1993-02-27

Applicant: SCHROFF GERHART ,  STETTER MICHAEL

Inventor： SCHROFF GERHART ,  STETTER MICHAEL

IPC: G01M3/38

Abstract: In a process to check vessels or containers for leaks, a test fluid is introduced into the vessel at a pressure higher than that around the vessel. The test fluid has a dielectric susceptibility which is highly non-linear in relation to the field strength of an electromagnetic field. Test fluid leaking from the vessel (11) enters a test area (12) subject to a coherent electromagnetic field, (14,17) which imposes on the test fluid a spatially defined varying optical density. A phase-coupled electromagnetic field reflected from this structure reveals the presence of a leak from the vessel. USE - For testing closed vessel such as vehicle oil coolers and water radiators.

公开(公告)号：DE102004034832A1

公开(公告)日：2006-03-16

申请号：DE102004034832

申请日：2004-07-19

Applicant: SCHROFF GERHART ,  STETTER MICHAEL

Inventor： SCHROFF GERHART ,  STETTER MICHAEL

IPC: G01N21/25 ,  G01N21/37 ,  G01N21/61 ,  G01N29/04

Abstract: Analyzing a gas mixture by exposing it to intensity-modulated electromagnetic radiation in a test zone and detecting radiation-absorbing gases and/or impurities by means of a photoacoustic signal comprises adding to the mixture a gas (G2) that suppresses kinetic cooling so that the photoacoustic signal is an unambiguous measure of the energy absorbed by the radiation-absorbing gases and/or impurities. Independent claims are also included for: (1) suppressing and/or analyzing kinetic cooling in an optical imaging or irradiating system comprising a zone through which electromagnetic radiation is passed and and which is filled or flushed with a radiation-nonabsorbing protective gas (G1), by enriching G1 with a gas (G2) in an amount such that kinetic cooling is suppressed and/or the partial pressure of G2 is 2-300 mbar and/or the energy absorbed by radiation-absorbing gases and/or impurities in G1 is an unambiguous means of assessing the radiation quality of the system and/or the G1+G2 mixture can be analyzed for radiation-absorbing gases and/or impurities; (2) gas analysis system comprising a detection chamber (3) that can be filled with a gas mixture to be analyzed, a radiation source (11) for irradiating the detection chamber with intensity-modulated electromagnetic radiation, and an acoustic sensor (7) for detecting pressure fluctuations produced by the photoacoustic effect, and a device for adding to the mixture a gas (G2) that suppresses kinetic cooling.

公开(公告)号：AU2002367326A1

公开(公告)日：2003-07-24

申请号：AU2002367326

申请日：2002-12-30

Applicant: SCHROFF GERHART ,  STETTER MICHAEL

Inventor： SCHROFF GERHART ,  STETTER MICHAEL

IPC: B23K26/12 ,  B23K26/70 ,  G01N21/17 ,  B23K26/42

公开(公告)号：DE19813432A1

公开(公告)日：1999-09-30

申请号：DE19813432

申请日：1998-03-27

Applicant: STETTER MICHAEL ,  SCHROFF GERHART

Inventor： STETTER MICHAEL ,  SCHROFF GERHART

IPC: G01M3/20 ,  G01M3/22 ,  G01M3/32 ,  B65D90/50 ,  G01M3/38 ,  G01N21/71 ,  G01N21/90 ,  G01N25/18 ,  G01N27/18 ,  G01N27/62 ,  G01N29/22

Abstract: The integrity of essentially closed components, housings, or containers (10), pressurized with a test gas, is tested for leakage points (2) by using a test probe defining a test-volume (4), which is bounded by at least part of a test-area (5), so that in the event of a leak being present in this area, the only test-gas drawn into the probe is that escaping from the leak. The probe device uses a curtain of clean air, or non-test gas, expelled around its bottom edge in order to exclude contaminated air. An Independent claim is also included for the apparatus for testing comprising a detector such as a mass spectrometer or semiconductor device, and a device to determine the proportion of test gas in the gas flow drawn through the detector e.g. thermal conductivity or an electron resonance technique.

公开(公告)号：DE19650257A1

公开(公告)日：1998-06-10

申请号：DE19650257

申请日：1996-12-04

Applicant: SCHROFF GERHART ,  STETTER MICHAEL

Inventor： SCHROFF GERHART ,  STETTER MICHAEL

IPC: G01J3/00 ,  G01M3/20 ,  G01M3/32 ,  G01M3/38 ,  G01N21/17 ,  G01N21/25

Abstract: The method involves placing a test object in a test chamber, supplying a test gas which is different from an environmental atmosphere, under pressure which is increased with respect to the pressure in the test chamber. The pressure in the test chamber is chosen in such way, that the test gas leaving from possible leakages of the test object can expand quickly in the test chamber so that a defined, from the place of the leakages independent, test gas concentration distribution can settle. The test gas concentration produced in the test chamber are detected, and the size of the leakages is estimated directly from the determined test gas concentrations.