Video monitoring system using variable focal length lens

• US 20060203117A1
• Filed: 03/10/2005
• Published: 09/14/2006
• Est. Priority Date: 03/10/2005
• Status: Abandoned Application

• Current Assignee: Angstrom, Inc., Stereo Display, Inc.
• Original Assignee: Angstrom, Inc., Stereo Display, Inc.
• Inventors: Seo, Cheong Soo, Cho, Gyoung Il, Baek, Sang Hyune
• Application Number:
  US11/076,688
• Publication Number:
  US 20060203117A1
• Time in Patent Office: Days
• US Class Current: 348/345
• CPC Class Codes: G02B 26/0833 the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD G02B26/0825 takes precedence; micromechanical devices in general B81B
• CPC Class Codes: G02B 26/0841 the reflecting element being moved or deformed by electrostatic means
• CPC Class Codes: G02B 3/12 Fluid-filled or evacuated lenses
• CPC Class Codes: G03B 17/17 with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera
• CPC Class Codes: H04N 23/63 by using electronic viewfinders
• CPC Class Codes: H04N 23/661 Transmitting camera control signals through networks, e.g. control via the Internet
• CPC Class Codes: H04N 23/695 Control of camera direction for changing a field of view, e.g. pan, tilt or based on tracking of objects
• CPC Class Codes: H04N 23/959 by adjusting depth of field during image capture, e.g. maximising or setting range based on scene characteristics
• CPC Class Codes: H04N 7/181 for receiving images from a plurality of remote sources

Abstract

A video monitoring system includes at least one camera system, an objective lens system, and at least one micromirror array lens configured to focus an objective image received by the objective lens system onto an image sensor. In another embodiment, a method in a video monitoring system is presented. The method includes the steps of receiving an object image, and adjusting a micromirror array lens to focus the object image. The advantages of the present invention include providing clear images and fast tracking and focusing of moving objects, and may also include tracking of moving objects without or with changing the attitude of the camera. If the camera attitude is not changed for tracking of moving objects, the present invention can reduce the size and cost.

Claims

1. An optical system, comprising:

at least one camera system;

an objective lens system, configured to receive an object image;

at least one micromirror array lens, optically coupled to the objective lens system, configured to focus the object image received by the objective lens system onto an image sensor;

wherein the image sensor, being optically coupled to the micromirror array lens, configured to receive the focused object image from the micromirror array lens and to sense the focused object image; and

an image storage system, communicatively coupled to the at least one camera system, configured to store the object image received by the at least one camera system.

2. The optical system of claim 1, further comprising an image display device, communicatively coupled to the at least one camera system, configured to display the object image received by the at least one camera system.

3. The optical system of claim 2, wherein the image display device is a monitor.

4. The optical system of claim 1, wherein the image storage system is selected from the group consisting of an analog recording system and a digital recording system.

5. The optical system of claim 1, further comprising a zoom device, selected from the group consisting of a motor driven zoom and a manual zoom.

6. The optical system of claim 1, further comprising a zoom device, wherein the zoom device is performed using micromirror array lenses.

7. The optical system of claim 1, further comprising an auto-focus device, selected from the group consisting of a motor driven auto-focus device and a manual auto-focus device.

8. The optical system of claim 1, further comprising an auto-focus device, wherein the auto-focus device is performed using micromirror array lens.

9. The optical system of claim 1, further comprising an image processor, communicatively coupled to the image sensor, configured to process the object image sensed by the image sensor and to generate image data and position information of the object.

10. The optical system of claim 9, wherein the image processor includes at least one of the group consisting of an object identification algorithm, an object recognition algorithm, and an object tracking algorithm.

11. The optical system of claim 1, further comprising a tracking controller, communicatively coupled to the image processor, configured to generate a tracking signal to control at least one of the group consisting of an attitude of the camera system, an optical axis of the micromirror array lens, and a focal length of the micromirror array lens.

12. The optical system of claim 1, further including an algorithm selected the group consisting of an attitude control algorithm to control the attitude of the camera system, an image processing algorithm to process the object image sensed by the image sensor, and an object identification and tracking algorithm to identify and track objects.

13. The optical system of claim 1, further comprising a camera attitude driving mechanism, mechanically coupled to the camera system, configured to adjust at least one of the group consisting of camera system tilt and camera system pan.

14. The optical system of claim 13, wherein the camera attitude driving mechanism further includes at least one of the group consisting of a tilt motor and a pan motor.

15. The optical system of claim 1, further comprising a motion sensor, communicatively coupled to the camera system, configured to sense motion of a moving object.

16. The optical system of claim 1, further comprising an image transmission system, communicatively coupled to the camera system, configured to transmit images from the camera system.

17. The optical system of claim 16, wherein the image transmission system includes at least one of the group consisting of a wire, a wireless connection, and an internet connection.

18. The optical system of claim 17, wherein the wireless connection includes at least one of the group consisting of radio waves, and infrared waves.

19. A method in a video monitoring system, comprising:

receiving an object image; and

adjusting a micromirror array lens to focus the object image.

20. The method claim 19, further comprising storing the object image focused by the micromirror array lens.

21. The method claim 19, further comprising controlling the micromirror array lens to automatically focus on the object image.

22. The method claim 19, further comprising controlling the micromirror array lens to zoom onto the object image.

23. The method claim 19, further comprising controlling the micromirror array lens to track a moving object.

24. The method claim 19, further comprising producing three-dimensional information pertaining to the object image.