WE PROPOSE A NEW MEASURING/CLEANING METHOD FOR CLOSED SURFACES (PIPES) APPLICABLE TOREMOVING CONTAMINANTS (OIL FILMS FUNGUS RUST) FROM NASA INSTRUMENTS AND SPACECRAFT. THIS TECHNIQUE RELIES ON ACOMBINATION OF HOLOGRAPHIC IN-LINE INTERFEROMETRY (HILI) AND COHERENT FRINGE PROJECTION (CFP) TECHNIQUES IN ONESET-UP WITH MODIFICATION NEEDED TO WORK INSIDE CLOSED SURFACES OF TUBES AND PIPES. ADDITIONALLY WE PROPOSE AUNIFIED APPROACH FOR MODELING OF BOTH HILI AND CFP THAT IS SUITABLE FOR REMOTE CHARACTERIZATION OF CONTAMINANTSINSIDE THESE STRUCTURES. THIS MODELING APPROACH IS BASED ON THE CONCEPT OF THE COHERENT SUPERPOSITION OF PARTIALINTERFERENCE PATTERNS. WE WILL SHOW THAT THE COMBINATION OF LASER-INDUCED FLUORESCENCE AND LASER INDUCED OPTICALTRAPPING AND EVAPORATION WILL PROVIDE MORE ACCURATE DETECTION AND A NEW METHOD OF LASER-INDUCED CLEANING OFCONTAMINATION. BASED ON OUR PREVIOUS EXPERIENCE WITH OIL CONTAMINATION WE WILL USE A MODIFIED VERSION OF FRINGEPROJECTION INTERFEROMETRY TO MONITOR CONTAMINATION IN THE PIPES WHICH WILL INCLUDE A FLEXIBLE COHERENT OPTICAL FIBERBUNDLE TO ALLOW INSPECTION OF PIPE S INNER SPACE. FOR CLEANING OF CLOSED SURFACES (PIPES TANKS) WE WILL USE FLEXIBLEOPTICAL FIBERS. LASER EVAPORATED VOLATILE FRACTIONS WILL BE REMOVED BY AIR PUMPS AND THE CONDENSATE MAY BE USEDFOR FURTHER UTILIZATION. COHERENT FRINGE PROJECTION (CFP) TECHNIQUES PROVED TO BE EFFICIENT IN OUR PREVIOUS EFFORTSINVOLVING NON-CONTACT METROLOGY OF MICROSTRUCTURED OBJECTS.1.PRELIMINARY RESEARCHIN SPITE OF THE GREAT NEED FOR EFFECTIVE METHODS OF REMOTE DETECTION/IDENTIFICATION OF CRUDE OIL AND OTHER OIL-BASEDPOLLUTANTS IN WATER AND/OR ON THE SOLID SURFACES THERE IS STILL A DEMAND FOR MORE EFFICIENT AND RELIABLE METHODS [1].SPECTROSCOPIC METHODS ALLOW DETERMINATION OF COMPOSITION [2] WHILE INTERFEROMETRY ALLOWS FINDING OIL FILMTHICKNESS [3]. USUALLY THESE TWO APPROACHES NEED DIFFERENT EXPERIMENTAL IMPLEMENTATION. WE COMBINEDSPECTROSCOPIC METHOD OF LASER-INDUCED FLUORESCENCE WITH HOLOGRAPHIC INTERFEROMETRY IN ONE SET-UP FOR RELIABLEDETECTION/IDENTIFICATION OF OIL.WE DESCRIBED TWO DIFFERENT EXPERIMENTAL SCHEMES OF INTERFEROMETRY: WITH A SINGLE BEAM AND TWO BEAMS.FIG.1 SHOWS A SIMPLE SCHEME OF HOLOGRAPHIC INTERFEROMETRY WHERE EXPANDED NEAR-COLLIMATED LASER BEAM REFLECTEDFROM THE OIL-WATER OR OIL SOLID MATERIAL SURFACE.SCHEME OF OIL ON- WATER FILM INTERFEROMETRY DISTANCE BETWEEN OIL FILM AND SCREEN ~ 6M.EXAMPLES OF TYPICAL INTERFEROGRAM ARE SHOWN ON THE FIG.2FIG.2 TYPICAL INTERFERENCE PATTERNS ON REFLECTION FROM THE OIL-ON-WATER FILM UNDER NEAR-NORMAL ILLUMINATION BY HENELASER.DUE TO THE DIFFERENCE IN REFLECTANCE THICK OIL FILM APPEAR AS BRIGHT SPOTS WHILE WATER IS SHOWN AS DARK PARTS IN THEPICTURE. GEOMETRY OF FRINGES REFLECTS THICKNESS