CA2087467C - Wide field of view optical element - Google Patents
Wide field of view optical elementInfo
- Publication number
- CA2087467C CA2087467C CA002087467A CA2087467A CA2087467C CA 2087467 C CA2087467 C CA 2087467C CA 002087467 A CA002087467 A CA 002087467A CA 2087467 A CA2087467 A CA 2087467A CA 2087467 C CA2087467 C CA 2087467C
- Authority
- CA
- Canada
- Prior art keywords
- reflective means
- detector
- sides
- reflective
- disposed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 40
- 239000012780 transparent material Substances 0.000 claims abstract description 6
- 230000008685 targeting Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 7
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
- G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/04—Optical or mechanical part supplementary adjustable parts
- G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
- G01J1/0474—Diffusers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
- G08B13/19—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems
- G08B13/193—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems using focusing means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
- G01J1/0266—Field-of-view determination; Aiming or pointing of a photometer; Adjusting alignment; Encoding angular position; Size of the measurement area; Position tracking; Photodetection involving different fields of view for a single detector
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/4804—Auxiliary means for detecting or identifying lidar signals or the like, e.g. laser illuminators
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Burglar Alarm Systems (AREA)
- Optical Elements Other Than Lenses (AREA)
- Optical Radar Systems And Details Thereof (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
A wide field-of-view optical element 12 suitable for use in a laser warning system including a frusto-conical block of optically transparent material having a first surface 14 and a second surface 16. The first surface 14 is parallel with the second surface 16 and coaxial therewith. The radius R1 of the first surface 14 is less than the radius R2 of the second surface such that the sides of the element 12 are slanted. Reflective material is coated on the interior 17 of the first surface 14 for directing incident optical energy toward a detector 20 mounted at the second surface 16. Similarly, a reflective material is coated on the interior 18 of the second surface 16 for directing incident optical energy to the detector 20 via the first surface 14. The second reflective coating on the second surface is disposed between the outer periphery thereof and a nonzero distance R3 from the center thereof to provide an aperture at which the detector 20 may be mounted.
Description
WIDE FIELD OF VIEW OPTICAL ~T-~NT
~087467 BACRGROUND OF THE lN V ~:~. . lON
Field of the Invention:
This invention relates to optical sensors. More specifically, this invention relates to sensors for detecting laser illumination.
While the present invention is described herein with reference to a particular embodiment, it is understood that the invention is not limited thereto. Those having ordinary skill in the art and access to the teachings provided herein will recognize additional embodiments within the scope thereof.
Descri~tion of the Related Art:
Laser target designators are well known in the art.
These systems simply include a laser which outputs a beam which is directed by a spotter onto a target.
Reflections of the beam from the target are detected and used to guide ordnance thereto.
The accuracy of these systems has created a need for an ability to detect an incoming targeting beam. This necessity arises in connection with the need to identify friend or foe (IFF) and to indicate laser targeting (laser warning).
Conventional IFF systems are typically implemented with radio waves. There is no known system for IFF in connection with a laser targeting system.
~ 208~467 While laser warning systems are known in the art, conventional systems are generally too expensive and often too fragile for the rugged battlefield conditions characteristic of military applications. A conventional laser warning system may currently cost as much as the vehicle (e.g. jeep or truck) which the system is designed to protect.
Accordingly, a need exists in the art for an inexpensive, rugged IFF and laser warning system.
8UMNARY OF THE lNv~.~lON
15 The need in the art is addressed by the present invention which provides a wide field-of-view optical element suitable for use in a laser warning system. The invention comprises a block of optically transparent material having a first surface and a second surface.
The first surface is parallel with the second surface and coaxial therewith. The width Rl of the first surface is less than the width R2 ~f the second surface such that the sides of the element are slanted. A reflective material is coated on or disposed at the first surface for directing incident optical energy toward a detector mounted at the second surface. Similarly, a diffusely reflective material is coated on or disposed at the second surface for directing incident optical energy to the detector via the first surface. The second reflective coating on the second surface is disposed between the outer periphery thereof and a nonzero distance R3 from the center thereof to provide an aperture at which a detector may be mounted.
~ ~ ~ 7 4 b7 - 2a Other aspects of this invention are as follows:
A wide field-of-view optical element comprising a block of optically transparent material having: a first surface and a second surface, said first surface being parallel with said second surface and coaxial therewith, the width Rl of the first surface being less than the width R2 of said second surface such that the sides of said element are slanted; first reflective means disposed at said first surface for directing incident optical energy; and second reflective means disposed at said second surface for directing incident optical energy wherein an optical beam within said wide field-of-view incident on said slanted ~ides is directed by refraction at said sides or by reflections off said first and/or second reflective means to a position near the center of said second surface.
A laser warning system comprising: a wide field-of-view optical element consisting of a frusto-conical block of optically transparent material having: a first surface and a second surface, said first surface being parallel with said second surface and coaxial therewith, the width Rl of the first surface being less than the width R2 of said second surface such that the sides of said element are slanted, first reflective means disposed at said first surface for directing incident optical energy, and second reflective means disposed at said second surface for directing incident optical energy, said second reflective means being disposed on said second surface between the outer periphery thereof and a non-zero distance R3 from the center thereof to provide an aperture; an optical detector mounted at said aperture, whereby a laser beam from a laser target designator incident within said field-of-view on the sides of said frusto-conical block is refracted and/or reflected by said first and/or second reflective means to said optical detector; and electronic means for processing signals . ~
3 ~ ~ ~ 7 4 ~7 provided by said detector to indicate targeting by a laser target designator.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a perspective view of the sensor constructed in accordance with the present teachings.
Fig. 2 is a top view of the sensor constructed in accordance with the present teachings.
Fig. 3 is a side view of the sensor constructed in accordance with the present teachings.
Fig. 4 is a block diagram of an illustrative electronic system for processing signals detected by the sensor of the present invention and providing an output in response thereto.
DESCRIPTION OF THE lNV~:N'llON
The present invention is a laser warning system including a sensor of unique and advantageous design, a detector, and a circuit for processing signals generated thereby indicating the presence of an incoming laser beam.
Fig. 1 is a perspective view of the sensor 10 constructed in accordance with the present teachings.
Fig. 2 is a top view of the sensor 10 and Fig. 3 is a side view of the sensor 10.
As best illustrated in Fig. 3, the sensor 10 includes an element 12 of optical grade plastic or glass transparent at the wavelengths of interest. In the preferred embodiment, the element 12 is frusto-conical (truncated cone) in shape such that the top surface 14 is planar and parallel to a bottom surface 16 and coaxial therewith.
As illustrated in Fig. 2, the radius Rl of the first surface 14 is less than the radius R2 of the second ~ _ _4 ~7~6~
surface 16 such that the sides of the element 12 (Fig. 3) are slanted. In the preferred embodiment, the radii of the top and bottom surfaces are chosen so that the sides are slanted at an angle of 45~.
Referencing Fig. 3 and/or Fig. 2, reflective material (either an optical thin film coating or reflective paint) is coated on the interior 17 of the top surface 14 to provide a reflective or mirrored surface for directing incident optical energy toward the detector 20 mounted at the aperture 19. The top surface 14 reflects light within the element 12 to the detector 20.
A reflective material (e.g., white paint) is coated on the interior 18 of the bottom surface 16 for directing incident optical energy to the detector 20 via the top surface 14. The second reflective coating on the bottom surface is disposed between the outer periphery thereof and a non-zero distance R3 from the center thereof. A
small circular area at the center of the bottom interior surface 18 is unpainted to provide the aperture 19 which allows incoming rays of optical energy to pass through the element 12 to the detector 20. The detector 20 may be a conventional detector constructed of silicon or other suitable material. One such detector is the Model FND-100 currently available from EG&G Company of Massachusetts.
In operation, on receipt of incoming optical radiation from a laser target designator, the beam is directed to the detector 20 by the first and second reflective surfaces 17 and 18. First, second, third and fourth incoming optical beams 22, 24, 26, and 28 are shown in Fig. 3. As illustrated in Fig. 3, the optical element provides 360~ of coverage in azimuth and -20~ to 90~ of coverage in elevation. ~ight entering the element 12 strikes the white bottom surface 18 and is diffusely scattered. The detector 20 sees a portion of the 5 ~ 6 4 6 ~
scattered light reflected in the top mirrored surface 17.
Optical energy at the wavelength of interest is sensed by the detector 20 which provides an electrical output signal in response thereto.
Fig. 4 is a block diagram of an illustrative electronic system 30 for processing the detected signals.
The signals provided by the detector 20 are processed by a high speed analog/digital processor 32 to provide output signals appropriate for a given application, e.g., IFF or laser warning. For laser warning, the processor 32 might provide a signal to sound an alarm 34 or to activate appropriate systems 38 to address the potential threat. In an IFF application, the processor might provide a "friendly" code to a transmitter 36 for transmission. Those skilled in the art will appreciate that many systems can be used in connection with the optical element 12 of the present invention.
Thus, the invention provides a wide field-of-view optical element 12 suitable for use in a laser warning system. The present invention has been described with reference to a particular embodiment in connection with a particular application. Those having ordinary skill in the art and access to the teachings of the present invention will recognize additional modifications and applications within the scope thereof. For example, other shapes may be used for the optical element, such as a truncated pyramid, without departing from the scope of the present teachings.
It is therefore contemplated by the appended claims to cover any and all such modifications, applications and embodiments.
~087467 BACRGROUND OF THE lN V ~:~. . lON
Field of the Invention:
This invention relates to optical sensors. More specifically, this invention relates to sensors for detecting laser illumination.
While the present invention is described herein with reference to a particular embodiment, it is understood that the invention is not limited thereto. Those having ordinary skill in the art and access to the teachings provided herein will recognize additional embodiments within the scope thereof.
Descri~tion of the Related Art:
Laser target designators are well known in the art.
These systems simply include a laser which outputs a beam which is directed by a spotter onto a target.
Reflections of the beam from the target are detected and used to guide ordnance thereto.
The accuracy of these systems has created a need for an ability to detect an incoming targeting beam. This necessity arises in connection with the need to identify friend or foe (IFF) and to indicate laser targeting (laser warning).
Conventional IFF systems are typically implemented with radio waves. There is no known system for IFF in connection with a laser targeting system.
~ 208~467 While laser warning systems are known in the art, conventional systems are generally too expensive and often too fragile for the rugged battlefield conditions characteristic of military applications. A conventional laser warning system may currently cost as much as the vehicle (e.g. jeep or truck) which the system is designed to protect.
Accordingly, a need exists in the art for an inexpensive, rugged IFF and laser warning system.
8UMNARY OF THE lNv~.~lON
15 The need in the art is addressed by the present invention which provides a wide field-of-view optical element suitable for use in a laser warning system. The invention comprises a block of optically transparent material having a first surface and a second surface.
The first surface is parallel with the second surface and coaxial therewith. The width Rl of the first surface is less than the width R2 ~f the second surface such that the sides of the element are slanted. A reflective material is coated on or disposed at the first surface for directing incident optical energy toward a detector mounted at the second surface. Similarly, a diffusely reflective material is coated on or disposed at the second surface for directing incident optical energy to the detector via the first surface. The second reflective coating on the second surface is disposed between the outer periphery thereof and a nonzero distance R3 from the center thereof to provide an aperture at which a detector may be mounted.
~ ~ ~ 7 4 b7 - 2a Other aspects of this invention are as follows:
A wide field-of-view optical element comprising a block of optically transparent material having: a first surface and a second surface, said first surface being parallel with said second surface and coaxial therewith, the width Rl of the first surface being less than the width R2 of said second surface such that the sides of said element are slanted; first reflective means disposed at said first surface for directing incident optical energy; and second reflective means disposed at said second surface for directing incident optical energy wherein an optical beam within said wide field-of-view incident on said slanted ~ides is directed by refraction at said sides or by reflections off said first and/or second reflective means to a position near the center of said second surface.
A laser warning system comprising: a wide field-of-view optical element consisting of a frusto-conical block of optically transparent material having: a first surface and a second surface, said first surface being parallel with said second surface and coaxial therewith, the width Rl of the first surface being less than the width R2 of said second surface such that the sides of said element are slanted, first reflective means disposed at said first surface for directing incident optical energy, and second reflective means disposed at said second surface for directing incident optical energy, said second reflective means being disposed on said second surface between the outer periphery thereof and a non-zero distance R3 from the center thereof to provide an aperture; an optical detector mounted at said aperture, whereby a laser beam from a laser target designator incident within said field-of-view on the sides of said frusto-conical block is refracted and/or reflected by said first and/or second reflective means to said optical detector; and electronic means for processing signals . ~
3 ~ ~ ~ 7 4 ~7 provided by said detector to indicate targeting by a laser target designator.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a perspective view of the sensor constructed in accordance with the present teachings.
Fig. 2 is a top view of the sensor constructed in accordance with the present teachings.
Fig. 3 is a side view of the sensor constructed in accordance with the present teachings.
Fig. 4 is a block diagram of an illustrative electronic system for processing signals detected by the sensor of the present invention and providing an output in response thereto.
DESCRIPTION OF THE lNV~:N'llON
The present invention is a laser warning system including a sensor of unique and advantageous design, a detector, and a circuit for processing signals generated thereby indicating the presence of an incoming laser beam.
Fig. 1 is a perspective view of the sensor 10 constructed in accordance with the present teachings.
Fig. 2 is a top view of the sensor 10 and Fig. 3 is a side view of the sensor 10.
As best illustrated in Fig. 3, the sensor 10 includes an element 12 of optical grade plastic or glass transparent at the wavelengths of interest. In the preferred embodiment, the element 12 is frusto-conical (truncated cone) in shape such that the top surface 14 is planar and parallel to a bottom surface 16 and coaxial therewith.
As illustrated in Fig. 2, the radius Rl of the first surface 14 is less than the radius R2 of the second ~ _ _4 ~7~6~
surface 16 such that the sides of the element 12 (Fig. 3) are slanted. In the preferred embodiment, the radii of the top and bottom surfaces are chosen so that the sides are slanted at an angle of 45~.
Referencing Fig. 3 and/or Fig. 2, reflective material (either an optical thin film coating or reflective paint) is coated on the interior 17 of the top surface 14 to provide a reflective or mirrored surface for directing incident optical energy toward the detector 20 mounted at the aperture 19. The top surface 14 reflects light within the element 12 to the detector 20.
A reflective material (e.g., white paint) is coated on the interior 18 of the bottom surface 16 for directing incident optical energy to the detector 20 via the top surface 14. The second reflective coating on the bottom surface is disposed between the outer periphery thereof and a non-zero distance R3 from the center thereof. A
small circular area at the center of the bottom interior surface 18 is unpainted to provide the aperture 19 which allows incoming rays of optical energy to pass through the element 12 to the detector 20. The detector 20 may be a conventional detector constructed of silicon or other suitable material. One such detector is the Model FND-100 currently available from EG&G Company of Massachusetts.
In operation, on receipt of incoming optical radiation from a laser target designator, the beam is directed to the detector 20 by the first and second reflective surfaces 17 and 18. First, second, third and fourth incoming optical beams 22, 24, 26, and 28 are shown in Fig. 3. As illustrated in Fig. 3, the optical element provides 360~ of coverage in azimuth and -20~ to 90~ of coverage in elevation. ~ight entering the element 12 strikes the white bottom surface 18 and is diffusely scattered. The detector 20 sees a portion of the 5 ~ 6 4 6 ~
scattered light reflected in the top mirrored surface 17.
Optical energy at the wavelength of interest is sensed by the detector 20 which provides an electrical output signal in response thereto.
Fig. 4 is a block diagram of an illustrative electronic system 30 for processing the detected signals.
The signals provided by the detector 20 are processed by a high speed analog/digital processor 32 to provide output signals appropriate for a given application, e.g., IFF or laser warning. For laser warning, the processor 32 might provide a signal to sound an alarm 34 or to activate appropriate systems 38 to address the potential threat. In an IFF application, the processor might provide a "friendly" code to a transmitter 36 for transmission. Those skilled in the art will appreciate that many systems can be used in connection with the optical element 12 of the present invention.
Thus, the invention provides a wide field-of-view optical element 12 suitable for use in a laser warning system. The present invention has been described with reference to a particular embodiment in connection with a particular application. Those having ordinary skill in the art and access to the teachings of the present invention will recognize additional modifications and applications within the scope thereof. For example, other shapes may be used for the optical element, such as a truncated pyramid, without departing from the scope of the present teachings.
It is therefore contemplated by the appended claims to cover any and all such modifications, applications and embodiments.
Claims (7)
1. A wide field-of-view optical element comprising a block of optically transparent material having:
a first surface and a second surface, said first surface being parallel with said second surface and coaxial therewith, the width R1 of the first surface being less than the width R2 of said second surface such that the sides of said element are slanted;
first reflective means disposed at said first surface for directing incident optical energy; and second reflective means disposed at said second surface for directing incident optical energy wherein an optical beam within said wide field-of-view incident on said slanted sides is directed by refraction at said sides or by reflections off said first and/or second reflective means to a position near the center of said second surface.
a first surface and a second surface, said first surface being parallel with said second surface and coaxial therewith, the width R1 of the first surface being less than the width R2 of said second surface such that the sides of said element are slanted;
first reflective means disposed at said first surface for directing incident optical energy; and second reflective means disposed at said second surface for directing incident optical energy wherein an optical beam within said wide field-of-view incident on said slanted sides is directed by refraction at said sides or by reflections off said first and/or second reflective means to a position near the center of said second surface.
2. The invention of Claim 1 wherein said second reflective means is disposed on said second surface between the outer periphery thereof and a non-zero distance R3 from the center thereof to provide an aperture.
3. The invention of Claim 2 wherein an optical detector is mounted at said aperture.
4. The invention of Claim 3 including electronic means for processing signals provided by said detector.
5. A laser warning system comprising:
a wide field-of-view optical element consisting of a frusto-conical block of optically transparent material having:
a first surface and a second surface, said first surface being parallel with said second surface and coaxial therewith, the width R1 of the first surface being less than the width R2 of said second surface such that the sides of said element are slanted, first reflective means disposed at said first surface for directing incident optical energy, and second reflective means disposed at said second surface for directing incident optical energy, said second reflective means being disposed on said second surface between the outer periphery thereof and a non-zero distance R3 from the center thereof to provide an aperture;
an optical detector mounted at said aperture, whereby a laser beam from a laser target designator incident within said field-of-view on the sides of said frusto-conical block is refracted and/or reflected by said first and/or second reflective means to said optical detector; and electronic means for processing signals provided by said detector to indicate targeting by a laser target designator.
a wide field-of-view optical element consisting of a frusto-conical block of optically transparent material having:
a first surface and a second surface, said first surface being parallel with said second surface and coaxial therewith, the width R1 of the first surface being less than the width R2 of said second surface such that the sides of said element are slanted, first reflective means disposed at said first surface for directing incident optical energy, and second reflective means disposed at said second surface for directing incident optical energy, said second reflective means being disposed on said second surface between the outer periphery thereof and a non-zero distance R3 from the center thereof to provide an aperture;
an optical detector mounted at said aperture, whereby a laser beam from a laser target designator incident within said field-of-view on the sides of said frusto-conical block is refracted and/or reflected by said first and/or second reflective means to said optical detector; and electronic means for processing signals provided by said detector to indicate targeting by a laser target designator.
6. The invention of Claim 2 wherein said first reflective means is a mirrored surface and whereas said second reflective means is a diffusely reflecting surface.
7. The invention of Claim 6 wherein said first reflective means is a mirrored surface and whereas said second reflective means is a diffusely reflecting surface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US836,025 | 1992-02-14 | ||
| US07/836,025 US5258609A (en) | 1992-02-14 | 1992-02-14 | Wide field of view optical element having plural reflectors of different widths |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2087467A1 CA2087467A1 (en) | 1993-08-15 |
| CA2087467C true CA2087467C (en) | 1999-03-16 |
Family
ID=25271045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002087467A Expired - Fee Related CA2087467C (en) | 1992-02-14 | 1993-01-18 | Wide field of view optical element |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5258609A (en) |
| EP (1) | EP0556042B1 (en) |
| JP (1) | JPH07111374B2 (en) |
| CA (1) | CA2087467C (en) |
| DE (1) | DE69303737T2 (en) |
| IL (1) | IL104609A (en) |
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|---|---|---|---|---|
| SE468025B (en) * | 1991-02-14 | 1992-10-19 | Foersvarets Forskningsanstalt | Laser Detector |
| US5359189A (en) * | 1993-03-29 | 1994-10-25 | At&T Bell Laboratories | Infrared collector having a flattened convex surface |
| US5473474A (en) * | 1993-07-16 | 1995-12-05 | National Research Council Of Canada | Panoramic lens |
| DE4407911C2 (en) * | 1994-03-09 | 1996-09-26 | Telefunken Microelectron | Optical system with a radiation focusing and deflecting optic body |
| US7576311B2 (en) * | 2005-09-13 | 2009-08-18 | Lockheed Martin Corporation | Optical detector having a sensing element, a lens and a frustum coupled to the lens |
| US8308725B2 (en) * | 2007-03-20 | 2012-11-13 | Minos Medical | Reverse sealing and dissection instrument |
| US9439746B2 (en) * | 2007-12-13 | 2016-09-13 | Insightra Medical, Inc. | Methods and apparatus for treating ventral wall hernia |
| WO2009140197A1 (en) | 2008-05-12 | 2009-11-19 | Revent Medical, Inc. | Partially erodable systems for treatment of obstructive sleep apnea |
| US8878114B2 (en) | 2012-08-16 | 2014-11-04 | Nanohmics, Inc. | Apparatus and methods for locating source of and analyzing electromagnetic radiation |
| FR3015696B1 (en) | 2013-12-20 | 2016-02-05 | Thales Sa | OPTICAL FIELD IMAGING MODULE WITH HEMISPHERIC FIELD AND CONTROLLED DISTORTION COMPATIBLE WITH AN OUTER ENVIRONMENT |
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|---|---|---|---|---|
| US3763372A (en) * | 1967-07-13 | 1973-10-02 | Inventors & Investors Inc | Zone plate optics monolithically integrated with photoelectric elements |
| US3958118A (en) * | 1975-02-03 | 1976-05-18 | Security Organization Supreme-Sos-Inc. | Intrusion detection devices employing multiple scan zones |
| US4325633A (en) * | 1980-06-02 | 1982-04-20 | Hughes Aircraft Company | Apparatus for determining of angle of incidence of electromagnetic energy |
| US4467194A (en) * | 1981-09-18 | 1984-08-21 | Honeywell Inc. | Omnidirectional electro-optical receiver |
| GB2119112B (en) * | 1982-04-27 | 1985-08-29 | Ferranti Plc | Optical elements |
| HU192125B (en) * | 1983-02-08 | 1987-05-28 | Budapesti Mueszaki Egyetem | Block of forming image for centre theory projection adn reproduction of spaces |
| US4679753A (en) * | 1984-08-21 | 1987-07-14 | Hughes Aircraft Company | Surveying satellite incorporating star-sensing attitude determination subsystem |
| AU560866B2 (en) * | 1984-09-25 | 1987-04-16 | Matsushita Electric Works Ltd. | Passive infrared detector |
| US4855588A (en) * | 1987-11-24 | 1989-08-08 | Santa Barbara Research Center | Cylindrical wide field receiver element |
| DE3818229C1 (en) * | 1988-05-28 | 1989-12-07 | Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De | |
| JPH0241188U (en) * | 1988-09-10 | 1990-03-22 |
-
1992
- 1992-02-14 US US07/836,025 patent/US5258609A/en not_active Expired - Lifetime
-
1993
- 1993-01-18 CA CA002087467A patent/CA2087467C/en not_active Expired - Fee Related
- 1993-02-04 IL IL10460993A patent/IL104609A/en not_active IP Right Cessation
- 1993-02-11 DE DE69303737T patent/DE69303737T2/en not_active Expired - Fee Related
- 1993-02-11 EP EP93300987A patent/EP0556042B1/en not_active Expired - Lifetime
- 1993-02-15 JP JP5025781A patent/JPH07111374B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| IL104609A (en) | 1996-01-31 |
| CA2087467A1 (en) | 1993-08-15 |
| JPH07111374B2 (en) | 1995-11-29 |
| EP0556042A1 (en) | 1993-08-18 |
| DE69303737D1 (en) | 1996-08-29 |
| DE69303737T2 (en) | 1997-01-30 |
| JPH05340805A (en) | 1993-12-24 |
| EP0556042B1 (en) | 1996-07-24 |
| US5258609A (en) | 1993-11-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |