X-ray Double-Exposure Holography

2002 ◽  
Author(s):  
Hongyi Gao
Keyword(s):  
Double Exposure ◽  
X Ray ◽  
Exposure Holography

Holographic Evaluation of Edge Delamination in Bars Bonded to a Rigid Support With Foam-Adhesive

1996 ◽  
Vol 118 (3) ◽  
pp. 330-334 ◽  
Author(s):  
S. Qin ◽  
H. M. Shang ◽  
C. L. Giam ◽  
C. E. Tee
Keyword(s):  
Theoretical Analysis ◽  
Rapid Detection ◽  
Iterative Procedure ◽  
Point Load ◽  
Nonlinear Relationship ◽  
Rigid Support ◽  
Double Exposure ◽  
Simple Method ◽  
Exposure Holography ◽  
Edge Delamination

When a bar having one end bonded to a rigid support with foam-adhesive is loaded, the high peeling stresses at the bonded edge foster edge delamination along the interface of bonding. Upon inspection by double exposure holography, with an incremental point load applied at the free end of the bar between exposures, the indistinct fringe perturbation and the unknown resilience of the foam-adhesive (quantified by its foundation modulus) impede unambiguous evaluation of the condition of adhesion. This paper describes a simple method for rapid detection and assessment of artificially created edge delamination in such bar structures. The theoretical analysis elucidates the suitability of modelling the bar as partially clamped, and having an equivalent slope at its support related to the foundation modulus. Two dimensionless parameters are defined, which have between them a linear relationship for a nondelaminated bonding but a nonlinear relationship for a delaminated one. Finally, a simple iterative procedure is described for estimating the delaminated length without having to predetermine the elasticity of the support.

Automatic analysis of knee ligaments using double exposure holography

1991 ◽  
Vol 24 (6) ◽  
pp. 489
Author(s):  
Huang Zhi ◽  
Torsten Wredmark ◽  
Ulrik Willers ◽  
Ingegerd Dirtoft ◽  
Rolf B Johansson
Keyword(s):  
Automatic Analysis ◽  
Double Exposure ◽  
Knee Ligaments ◽  
Exposure Holography

Aligned double exposure in deep X-ray lithography

1996 ◽  
Vol 30 (1-4) ◽  
pp. 235-238 ◽  
Author(s):  
A. Schmidt ◽  
W. Ehrfeld ◽  
H. Lehr ◽  
L. Müller ◽  
F. Reuther ◽  
...  
Keyword(s):  
Double Exposure ◽  
X Ray

Transient interference gratings and holograms in dyed plastic

1984 ◽  
Vol 62 (7) ◽  
pp. 669-673
Author(s):  
Sergio Calixto ◽  
R. A. Lessard
Keyword(s):  
Real Time ◽  
Diffraction Efficiency ◽  
Laser Light ◽  
Thick Layer ◽  
Double Exposure ◽  
Naked Eye ◽  
Sufficient Intensity ◽  
Exposure Holography ◽  
Reading Beam ◽  
Made In

Transient diffraction gratings were holographically made in dyed plastic by absorbing laser light. Mean energy values of 40 mJ/cm2 absorbed in a 3-mm thick layer were needed to make gratings that lasted about 10 s. The writing beams and a reading one of different wavelength were simultaneously made to fall on the plastic: the reading beam was diffracted by the grating, which produced transient diffracted beams of sufficient intensity to be seen by the naked eye or to be stored permanently by conventional photographic methods. Curves showing diffraction efficiency versus exposure with grating frequency as a parameter are presented. Applications to real-time single and double exposure holography are also discussed.

scholarly journals X-Ray Measurement of Stress by the Double Exposure Method

1969 ◽  
Vol 18 (195) ◽  
pp. 1034-1039
Author(s):  
Yasuo YOSHIOKA ◽  
Masao KOJIMA
Keyword(s):  
Double Exposure ◽  
X Ray ◽  
Exposure Method
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