Optical surveillance assembly and camera

• US 4,963,962 A
• Filed: 01/25/1989
• Issued: 10/16/1990
• Est. Priority Date: 01/25/1989
• Status: Expired due to Term

• Current Assignee: Visual Methods Incorporated
• Original Assignee: Visual Methods Incorporated
• Inventors: Sandin, Walter T., Kruegle, Herman A.
• Primary Examiner(s): Groody, James J.
• Assistant Examiner(s): Kostak, Victor R.
• Application Number:
  US07/301,657
• Time in Patent Office: 629 Days
• Field of Search: 358/108, 358/87, 358/225, 358/229, 358/213.28, 358/100, 358/99, 358/98, 354/25, 354/81, 310/36
• US Class Current: 348/151
• CPC Class Codes: G02B 27/642 Optical derotators, i.e. systems for compensating for image rotation, e.g. using rotating prisms, mirrors
• CPC Class Codes: G08B 13/19619 Details of casing
• CPC Class Codes: G08B 13/19626 optical details, e.g. lenses, mirrors or multiple lenses
• CPC Class Codes: G08B 13/1963 Arrangements allowing camera rotation to change view, e.g. pivoting camera, pan-tilt and zoom [PTZ]
• CPC Class Codes: H04N 7/18 Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Abstract

A covert surveillance camera assembly comprises a dummy sprinkler head for camouflaging a camera. The sprinkler head has a pair of parallel arms and a mirror is mounted in a predetermined position relative to the camera and between the arms of the sprinkler head. An associated mechanism for scanning an object area may include a rotating component for turning the mirror at a predetermined angular speed in a first direction about an optical axis of the optical device. A dovetail prism is provided for stabilizing an image transmitted from an outlet end of the surveillance assembly, the prism being rotated at one half the angular speed of the rotating mirror in a second direction about the optical device'"'"'s axis opposite to the first direction. The camera includes (a) a housing, (b) a transducer disposed in the housing for converting incoming electromagnetic radiation into electrical signals, the transducer including a solid state image sensor, (c) an element for movably mounting the image sensor to the housing, and (d) a shifting mechanism operatively connected to the image sensor for reciprocating the image sensor along a substantially linear path in a direction essentially transverse to the incoming electromagnetic radiation.

Claims

1. A covert surveillance camera assembly comprising:

a camera;

means for mounting said camera at a hidden location;

camouflage means for camouflaging said camera, said camouflage means including a facsimile of an object typically found adjoining said location;

means for mounting said camouflage means in a predetermined position relative to said camera;

a mirror rotatably mounted to said facsimile; and

scanning means for scanning an object area, said scanning means including means for rotating said mirror about an optical axis of the camera assembly.

2. The camera assembly set forth in claim 1 wherein said means for rotating takes the form of first drive means operatively connected to said mirror for rotating said mirror at a predetermined angular speed in a first direction about an optical axis of the camera assembly, further comprising means for stabilizing an image transmitted from an outlet end of the camera assembly, said means for stabilizing including an optical element disposed along said optical axis, and also comprising second drive means operatively connected to said optical element for rotating said optical element at one half said angular speed in a second direction about said optical axis opposite to said first direction.

3. The camera assembly set forth in claim 1 wherein said camera includes transducer means for converting incoming electromagnetic radiation into electrical signals, said transducer means including a solid state image sensor, further comprising image scanning means for scanning an object area, said scanning means including means for movably mounting said image sensor in a camera housing and shifting means operatively connected to said image sensor for reciprocating said image sensor along a linear path in a direction substantially transverse to the incoming electromagnetic radiation.

4. The camera assembly set forth in claim 1 wherein said facsimile takes the form of a dummy sprinkler head.

5. An assembly usable in combination with a surveillance camera installable inside a ceiling for receiving light through a hole in said ceiling, said assembly comprising in combination:

camouflage means including a dummy sprinkler head for camouflaging the camera;

first mounting means for mounting said sprinkler head in a predetermined location relative to the camera, said sprinkler head having a pair of parallel arms;

a mirror;

second mounting means for mounting said mirror in a predetermined position relative to the camera, said predetermined position being between the arms of said sprinkler head; and

means for pivoting said mirror about a horizontal axis.

6. The camera assembly set forth in claim 5 wherein said second mounting means includes a housing, said mirror being disposed in said housing, said housing being mounted in said predetermined position between the arms of said sprinkler head.

7. The camera assembly set forth in claim 6 wherein said housing is cylindrical and is provided with a cutout.

8. The camera assembly set forth in claim 5, said means for pivoting including an electrically conductive coil disposed in juxtaposition to said mirror and means operatively connected to said coil for feeding thereto an alternating current to periodically pivot said mirror about said transverse axis.

9. The camera assembly set forth in claim 5, said means for pivoting including an elongate substantially rigid member attached at one end to said mirror and extending substantially parallel to said optical axis, said means for pivoting further including means for translating said rigid member parallel to said optical axis.

10. A surveillance camera assembly installable inside a ceiling for receiving light through a hole in said ceiling, said camera comprising:

a housing;

transducer means disposed in said housing for converting incoming electromagnetic radiation into electrical signals, said transducer means including a solid state image sensor;

mounting means for movably mounting said image sensor to said housing; and

shifting means operatively connected to said image sensor for reciprocating said image sensor along a linear path in a direction substantially transverse to the incoming electromagnetic radiation.

11. The camera assembly set forth in claim 10, further comprising scanning means for scanning an object area, said scanning means including an optical subassembly with a mirror, said scanning means further including means for rotating said mirror about an optical axis of said optical subassembly.

12. The camera assembly set forth in claim 11 wherein said means for rotating takes the form of first drive means operatively connected to said mirror for rotating said mirror at a predetermined angular speed in a first direction about an optical axis of the optical assembly, further comprising means for stabilizing an image transmitted from an outlet end of the assembly, said means for stabilizing including an optical element disposed along said optical axis, and also comprising second drive means operatively connected to said optical element for rotating said optical element at one half said angular speed in a second direction about said optical axis opposite to said first direction.

13. The camera assembly set forth in claim 12 wherein said optical element takes the form of a dovetail prism.

14. An assembly usable in combination with a surveillance camera installable inside a ceiling for receiving light through a hole in said ceiling, said assembly comprising in combination:

a casing;

light transmission means mounted to said casing for receiving incoming electromagnetic radiation;

first drive means operatively connected to said light transmission means for rotating said light transmission means at a predetermined angular speed in a first direction about an optical axis of the assembly;

means for stabilizing an image transmitted from an outlet end of the assembly, said means for stabilizing including an optical element disposed along said optical path in said casing; and

second drive means operatively connected to said optical element for rotating said optical element at one half said angular speed in a second direction about said optical axis opposite to said first direction.

15. The camera assembly set forth in claim 14, further comprising a pair of collimating lenses mounted in said casing, said optical element being disposed between said collimating lenses.

16. The camera assembly set forth in claim 14 wherein said optical element takes the form of a dovetail prism.

17. A surveillance camera assembly installable inside a ceiling for receiving light through a hole in said ceiling, said camera comprising:

a housing;

a lens mounted to said housing;

transducer means disposed in said housing for converting incoming electromagnetic radiation into electrical signals, said transducer means including a solid state image sensor;

circuit means operatively connected to said image sensor for driving said image sensor and for processing signals generated thereby in response to incoming electromagnetic radiation;

mounting means for supporting said circuit means and mounting same to said housing, said mounting means including a circuit board juxtaposed to said lens and extending substantially parallel to an optical axis of said lens; and

attachment means for securing said housing to an inner surface of an architectural member.

18. The camera assembly set forth in claim 17 wherein said mounting means includes a pair of circuit boards juxtaposed to said lens on opposed sides thereof, each of said boards extending substantially parallel to said optical axis.

19. The camera assembly set forth in claim 17 wherein said attachment means includes a turntable, said housing being fixed to said turntable and said turntable being secured to said architectural member.

20. An assembly usable in combination with a surveillance camera installable inside a ceiling for receiving light through a hole in said ceiling, said assembly comprising in combination:

a mirror;

first mounting means for mounting said mirror in a predetermined position relative to said camera;

means for rotating said mirror, including an electrically conductive coil;

second mounting means for mounting said coil in a position juxtaposed to said mirror; and

means operatively connected to said coil for feeding thereto an alternating current to periodically pivot said mirror about an optical axis thereof.