Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1985-02-19
1987-09-29
Willis, Davis L.
Optics: measuring and testing
By particle light scattering
With photocell detection
356360, G01B 9021
Patent
active
046965726
ABSTRACT:
A surface inspection apparatus for inspecting the condition of a nonspherical subject surface includes a laser generator and a computer hologram. The laser beam emitted from the laser generator is divided by a light dividing unit into an object light directed toward the subject surface and a reference light directed toward the hologram. The object light is applied to the subject surface and then projected onto the hologram. The zeroth-order diffracted rays of the reference light passed through the hologram and the negative first-order diffracted rays of the object light passed through the hologram are caused to interface with each other, thereby producing interference fringes.
REFERENCES:
patent: 3642374 (1972-02-01), Matsumoto et al.
Snow et al. "On Using Holograms for Test Glasses", Applied Optics vol. 9, No. 4, pp. 822-827, 4/70.
Birch et al. "The Application of Computer-generated Holograms to Testing Optical Elements", J. Phys. D. Appl. Phys., vol. 5, pp. 1982-1992, 11/72.
Larionov et al., "Holographic Inspection of Aspherical Surfaces", Sov. J. Opt. Technol., vol. 46, pp. 229-231, 4/79.
Wyant et al., "Using Computer Generated Holograms to Test Aspheric Wavefronts", Applied Optics, vol. 11, No. 12, pp. 2833-2839, 12/72.
Ichioka et al., "Interferometric Testing of Large Optical Components with Circular Computer Holograms", Applied Optics, vol. 11, No. 11, pp. 2597-2602, 11/72.
Yatagai et al., "Interferometric Testing with Computer-generated Holograms: Aberration Balancing Method and Error Analysis", Applied Optics, vol. 17, No. 4, pp. 558-565, 2/78.
Kabushiki Kaisha Toshiba
Koren Matthew W.
Willis Davis L.
LandOfFree
Surface inspection apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Surface inspection apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface inspection apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1586856