Apparatus for non-destructive inspection of blind holes
Abstract
A miniaturized ellipsometric testing device comprising first means for precisely impinging a prescribed beam of light upon a surface to be tested and second means for capturing the reflected impinged beam only within prescribed limits. The value of the reflected impinged beam, which is transmissible to a detector, is used in determination of the validity of the surface tested; the miniaturized device is couplable to a laser light source and said detector by means of respective fiber optic cables.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- January 1985
- Bibcode:
- 1985STIN...8530295S
- Keywords:
-
- Holes (Mechanics);
- Laser Outputs;
- Nondestructive Tests;
- Optical Measuring Instruments;
- Optical Reflection;
- Amplifiers;
- Electric Potential;
- Frequencies;
- Holes;
- Low Noise;
- Noise Temperature;
- Patent Applications;
- Phase Locked Systems;
- Sensitivity;
- Tuning;
- Instrumentation and Photography