AUTOMATIC TRANSFORM ANALYZER

• US 3,634,695 A
• Filed: 02/02/1970
• Issued: 01/11/1972
• Est. Priority Date: 02/04/1969
• Status: Expired due to Term

• Current Assignee: Anthony Rene Barringer
• Original Assignee: Anthony Rene Barringer
• Inventors: Barringer, Anthony Rene
• Primary Examiner(s): Borchelt, Archie R.
• Assistant Examiner(s): Nelms, D. C.
• Application Number:
  US05/007,964
• Time in Patent Office: 708 Days
• Field of Search: 350/162 340/15.5 250/219R,219F,219QA,229 356/233
• US Class Current: 250/550
• CPC Class Codes: G02B 27/46 Systems using spatial filters
• CPC Class Codes: G06E 3/001 Analogue devices in which mathematical operations are carried out with the aid of optical or electro-optical elements optical elements per se G02B; devices consisting of a plurality of solid state components, including light sensitive semiconductor components, formed in or on a common substrate H01L27/14; electro-, magneto- or acousto-optics, non-linear optics G02F1/00; graph reading G06K11/00

Abstract

An optical data processing system of the coherent spatial filter type which (a) produces enhancement of the contrast of filtered images before they are photographed by providing a controllable optical attenuator in the path of the filtered light, the amount of light permitted to shine through the attenuator being a function of the intensity of the light, and (b) produces a rose diagram by providing a rotatable slit of adjustable length that is rotated in synchronism with the spatial filter, the length of the split being varied in accordance with the intensity of the light passing through the spatial filter; a camera is provided to record light from a conventional source that is collimated and passed through the rotatable slit.

Claims

1. An optical data processing system of the coherent spatial filter type comprising:

a. means for directing a beam of collimated coherent light through a transparency containing two-dimensional data to be processed, b. first focusing means for focusing said beam in a first focal plane after said beam has passed through said transparency, c. rotatable spatial filter means positioned in said first focal plane, said filter having an open area of predetermined shape to permit selected components of said beam to pass therethrough, d. second focusing means for focusing in a second focal plane the components of said beam which have passed through said spatial filter means, e. a detector positioned to receive a portion of said beam and being adapted to produce an output signal proportional in amplitude to the intensity of said beam, f. a function generator connected to said detector for producing a control signal having a predetermined functional relationship to said output signal of said detector, g. controllable optical attenuator means positioned to receive said beam after it has passed through said second focusing means, said attenuator means being connected to and controlled by said function generator, whereby the amount of light permitted to pass through said attenuator means is proportional to the level of said control signal, and h. means for recording said beam after it has passed through said attenuator,

2. An optical data processing system as claimed in claim 1 wherein said spatial filter means is an opaque disc having wedge-shaped transparent areas.

3. An optical data processing system as claimed in claim 1 wherein said control signal produced by said function generator has a logarithmic relationship to said detector output signal.

4. An optical data processing system as claimed in claim 2 wherein said recording means is a camera focused on the second focal plane.

5. An optical data processing system of the coherent spatial filter type comprising:

a. means for directing a beam of collimated coherent light through a transparency containing two-dimensional data to be processed, b. first focusing means for focusing said beam in a first focal plane after said beam has passed through said transparency, c. rotatable spatial filter means positioned in said first focal plane, said filter having an open area of predetermined shape to permit selected components of said beam to pass therethrough, d. second focusing means for focusing in a second focal plane the components of said beam which have passed through said spatial filter means, e. a detector positioned to receive a portion of said beam and being adapted to produce an output signal proportional in amplitude to the intensity of said beam, f. a function generator connected to said detector for producing a control signal having a predetermined functional relationship to said output signal of said detector, g. means for forming a second beam of light, h. a slit positioned in the path of said second beam, i. controllable means for adjusting the effective length of said slit, said adjusting means being connected to the output of said function generator whereby the effective length of said slit is proportioned to the amplitude of said control signal, j. means for recording images of said slit, and k. means coupled to said spatial filter for varying the relative positions of said recorded images in synchronism with the relative angular positions of said spatial filter.

6. An optical data processing system as claimed in claim 5 wherein said image position varying means comprises means for rotating said slit.

7. An optical data processing system as claimed in claim 6 wherein said adjusting means is a motorized iris positioned in close proximity with said slit.

8. An optical data processing system as claimed in claim 6 wherein said spatial filter means is an opaque disc having wedge-shaped transparent areas.

9. An optical data processing system as claimed in claim 8 wherein said recording means is a camera.