← Back to Patent Explorer
US3977771A Expired / Lapsed US ⏱️ 0.0 years remaining

Optical noise suppression device and method

Assignee: National Aeronautics and Space Administration
•
Filing: 1975-06-30
•
Granted: 1976-08-31
•
Expires: 1995-06-30
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Disclosed is a device and method for suppression of optical noise in an optical spatial filtering system using highly coherent light. In the disclosed embodiment, input photographic film to be processed in the system, and output photographic film to be exposed, are each mounted on lateral translation devices. During application of the coherent light for exposure of the output film, the two translation devices are moved in synchronism by a motor-driven gear and linkage assembly. The ratio of the resulting output film translation to the input film translation is equal to the magnification of the optical data processing system. The noise pattern associated with the lenses and other elements in the optical processing system remains stationary while the image-producing light moves laterally through the pattern with the output film, thus averaging out the noise effect at the output film.

Inventors

  • 👤 Joseph L. Horner

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 00:30
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/42; G02B27/46

Claims Analysis

Total Claims: 26
Claim 1
Independent Claim 92 words
An optical noise suppressor, in combination with an optical system including along its optic axis an input device and an output device, comprising: a. first translation means for selectively moving said input device perpendicularly with respect to said optic axis; b. second translation means for selectively moving said output device perpendicularly with respect to said optic axis; and c. synchronizing means for selectively causing said first translation means and said second translation means to move said input device and said output device respectively simultaneously along parallel paths perpendicular to said optic axis.
Claim 2
Dependent Claim 92 words
An optical noise suppressor, in combination with an optical system including along its optic axis an input device and an output device, comprising: a. first translation means for selectively moving said input device perpendicularly with respect to said optic axis; b. second translation means for selectively moving said output device perpendicularly with respect to said optic axis; and c. synchronizing means for selectively causing said first translation means and said second translation means to move said input device and said output device respectively simultaneously along parallel paths perpendicular to said optic axis.
Claim 3
Dependent Claim 30 words
An optical noise suppressor as defined in claim 1 wherein said synchronizing means comprises power means for effecting said motions by said first translation means and said second translation means.
Claim 4
Dependent Claim 32 words
An optical noise suppressor as defined in claim 2 further comprising shaft assembly means for transferring motion from said power means to said first translation means and to said second translation means.
Claim 5
Dependent Claim 40 words
An optical noise suppressor as defined in claim 3 further comprising: a. first gear means linking said shaft assembly means to said first translation means; and b. second gear means linking said shaft assembly means to said second translation means.
Claim 6
Dependent Claim 24 words
An optical noise suppressor as defined in claim 2 wherein said synchronizing means further comprises automatic control means for selectively actuating said power means.
Claim 7
Dependent Claim 24 words
An optical noise suppressor as defined in claim 4 wherein said synchronizing means further comprises automatic control means for selectively actuating said power means.
Claim 8
Dependent Claim 89 words
An optical noise suppressor as defined in claim 2 further comprising: a. said first translation means comprising: i. first carriage means on which is mounted said input device; ii. first ways means for guiding said first carriage means; iii. first screw drive means for propelling said first carriage means; and b. said second translation means comprising: i. second carriage means on which is mounted said output device; ii. second ways means for guiding said second carriage means; and iii. second screw drive means for propelling said second carriage means.
Claim 9
Dependent Claim 48 words
An optical noise suppressor as defined in claim 7 further comprising: a. first shaft means for transferring rotary motion from said power means to said first screw drive means; and b. second shaft means for transferring rotary motion from said power means to said second screw drive means.
Claim 10
Dependent Claim 44 words
An optical noise suppressor as defined in claim 8 further comprising: a. first gear box means linking said first shaft means to said first screw drive means; and b. second gear box means linking said second shaft means to said second screw drive means.
Claim 11
Dependent Claim 43 words
An optical noise suppressor as defined in claim 8 wherein said synchronizing means further comprises gear train means linking said first shaft means and said second shaft means to effect said simultaneous motions by said first translation means and said second translation means.
Claim 12
Dependent Claim 33 words
An optical noise suppressor as defined in claim 4 wherein said synchronizing means further comprises gear train means to effect said simultaneous motions by said second translation means and said first translation means.
Claim 13
Dependent Claim 24 words
An optical noise suppressor as defined in claim 10 wherein said synchronizing means further comprises automatic control means for selectively actuating said power means.
Claim 14
Dependent Claim 226 words
An optical noise suppressor for averaging out optical noise, in combination with a coherent light optical system which includes along its optic axis a spatial filter, an input device in an object plane, and an output device for recording light in an image plane, comprising: a. input carriage means on which is mounted said input device in said object plane; b. input ways means for constraining said input carriage means to confine said input device to said object plane while permitting said input carriage means to move said input device perpendicularly to said optic axis; c. input screw drive means for propelling said input carriage means; d. output carriage means on which is mounted said output device in said image plane; e. output ways means for constraining said output carriage means to confine said output device to said image plane while permitting said output carriage means to move said output device perpendicularly to said optic axis; f. output screw drive means for propelling said output carriage means; and g. power means equipped wih drive shaft assembly means for selectively causing simultaneous rotary motion of said input screw drive means and said output screw drive means to propel said input carriage means and said output carriage means so as to simultaneously move said input device and said output device along parallel paths perpendicular to said optic axis.
Claim 15
Dependent Claim 226 words
An optical noise suppressor for averaging out optical noise, in combination with a coherent light optical system which includes along its optic axis a spatial filter, an input device in an object plane, and an output device for recording light in an image plane, comprising: a. input carriage means on which is mounted said input device in said object plane; b. input ways means for constraining said input carriage means to confine said input device to said object plane while permitting said input carriage means to move said input device perpendicularly to said optic axis; c. input screw drive means for propelling said input carriage means; d. output carriage means on which is mounted said output device in said image plane; e. output ways means for constraining said output carriage means to confine said output device to said image plane while permitting said output carriage means to move said output device perpendicularly to said optic axis; f. output screw drive means for propelling said output carriage means; and g. power means equipped wih drive shaft assembly means for selectively causing simultaneous rotary motion of said input screw drive means and said output screw drive means to propel said input carriage means and said output carriage means so as to simultaneously move said input device and said output device along parallel paths perpendicular to said optic axis.
Claim 16
Dependent Claim 81 words
An optical noise suppressor as defined in claim 13 wherein said drive shaft assembly means comprises: a. rotatable first shaft means linked to said input screw drive means; b. rotatable second shaft means linked to said output screw drive means; and c. gear train means linking said first shaft means and said second shaft means for simultaneous rotational motion of said first shaft means and said second shaft means when said drive shaft assembly means is actuated by said power means.
Claim 17
Dependent Claim 52 words
An optical noise suppressor as defined in claim 14 further comprising: a. input gear box means for transferring rotary motion from said first shaft means to said input screw drive means; and b. output gear box means for transferring rotary motion from said second shaft means to said output screw drive means.
Claim 18
Dependent Claim 47 words
An optical noise suppressor as defined in claim 13 further comprising automatic control means to actuate said power means to cause said input device and said output device to be in said respective motions when said output device is actuated to record light in said optical system.
Claim 19
Dependent Claim 47 words
An optical noise suppressor as defined in claim 15 further comprising automatic control means to actuate said power means to cause said input device and said output device to be in said respective motions when said output device is actuated to record light in said optical system.
Claim 20
Dependent Claim 38 words
An optical noise suppressor as defined in claim 13 wherein the ratio of the speed of said output device motion to the speed of said input device motion is equal to the overall magnification of said optical system.
Claim 21
Dependent Claim 69 words
An optical noise suppressor as defined in claim 15 wherein said gear train means has an overall gear ratio equal to the inverse of the overall magnification of said optical system so as to constrain said motion of said output device to be at the same speed as the motion, in the image plane, of the image of said optical system caused by said motion of said input device.
Claim 22
Independent Claim 105 words
A method of suppressing optical noise in an optical system, wherein an output device is detecting information from an input device by way of said optical system, comprising the steps of: a. moving said input device perpendicularly to the optic axis of the optical system; b. simultaneously moving said output device along a path parallel to that of the movement of said input device; and c. synchronizing said motions of said input device and said output device so that the ratio of the speed of said output device to the speed of said input device is equal to the overall magnification of the optical system.
Claim 23
Independent Claim 105 words
A method of suppressing optical noise in an optical system, wherein an output device is detecting information from an input device by way of said optical system, comprising the steps of: a. moving said input device perpendicularly to the optic axis of the optical system; b. simultaneously moving said output device along a path parallel to that of the movement of said input device; and c. synchronizing said motions of said input device and said output device so that the ratio of the speed of said output device to the speed of said input device is equal to the overall magnification of the optical system.
Claim 24
Dependent Claim 49 words
A method of suppressing optical noise as defined in claim 20 further comprising the steps of: a. constraining said motion of said input device to the object plane of the optical system; and b. constraining said motion of said output device to the image plane of the optical system.
Claim 25
Dependent Claim 31 words
A method of suppressing optical noise as defined in claim 20 further comprising the step of effecting said motions of said input device and said output device by automatic power means.
Claim 26
Dependent Claim 35 words
A method of suppressing optical noise as defined in claim 20 further comprising the step of effecting said simultaneous movement of said input device and said output device in opposite directions along said parallel paths.

References Cited (Backward Citations)

US3492635A Cited
US3482102A Cited
US3620598A Cited
US3770340A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-08-31 1980-03-01 1980-08-31 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-08-31 1984-03-01 1984-08-31 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-08-31 1988-03-01 1988-08-31 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag