Optical sensor unit, optical sensor array, and method of driving optical sensor

• US 20040008992A1
• Filed: 06/20/2003
• Published: 01/15/2004
• Est. Priority Date: 06/28/2002
• Status: Active Grant

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Nishimura, Naoki
• Granted Patent: US 7,262,800 B2
• Time in Patent Office: Days
• US Class Current: 398/115
• CPC Class Codes: H04N 1/00103 specially adapted for radio transmission, e.g. via satellites H04N1/00098 takes precedence
• CPC Class Codes: H04N 1/0083 Arrangements for transferring signals between different components of the apparatus, e.g. arrangements of signal lines or cables for control or supervision between image input and output device H04N1/32
• CPC Class Codes: H04N 1/195 the array comprising a two-dimensional array or a combination of two-dimensional arrays
• CPC Class Codes: H04N 5/38 Transmitter circuitry for the transmission of television signals according to analogue transmission standards H04N5/14 takes precedence

Abstract

To provide an optical sensor unit in which the respective optical sensor elements can be easily provided on a curved surface without using wirings, a reduction in image pickup speed due to wiring delay is prevented to improve a photographing speed, and highly sensitive photographing is realized. The optical sensor unit is composed of an image pickup area section in which a large number of radio optical sensors are arranged and a radio communication means located in the vicinity thereof. The radio communication means has an image data signal circuit, a radio transmission circuit connected therewith, and an antenna. Each of the radio optical sensors is composed of an optical sensor element, a radio element, and an antenna.

Claims

1. An optical sensor unit comprising:

a plurality of radio optical sensor means each including an optical sensor and a radio element for transmitting and receiving of an information through communication with the optical sensor to and from an outside by radio; and

radio communication means for transmitting and receiving an electromagnetic wave as a radio signal to and from the radio elements, which is located in a region apart from the radio elements, wherein;

the radio communication means transmits to each of the radio elements an electromagnetic wave as a signal for requesting transmission of photographing information and an electromagnetic wave for supplying energy for photographing by the optical sensor and radio transmission and reception by the radio elements; and

each of the radio optical sensor means receives the electromagnetic waves and transmits photographing information of a subject from the optical sensor to the radio communication means through the radio element.

2. An optical sensor unit according to claim 1, wherein each of the radio optical sensor means is provided on a curved substrate and adapted to photograph the subject at different angles.

3. An optical sensor unit according to claim 2, wherein each of the radio optical sensor means is provided on a cylindrical substrate and adapted to photograph a 360°

image along a circumference of a cross section of the substrate.

4. An optical sensor unit according to claim 2, wherein each of the radio optical sensor means is provided on a spherical substrate and adapted to photograph an image in all directions.

5. An optical sensor unit according to claim 1, further comprising a plurality of position/direction detection elements for detecting positional information of the radio optical sensor means and directional information with respect to the subject and conducting communication to the radio elements, which are provided at different angles with respect to the subject, photographed image information, the positional information, and the directional information to the subject being transmitted to the radio communication means,

wherein the radio communication means synthesizes images of the subject from the respective information and displays the synthesized image.

6. An optical sensor unit according to claim 1, wherein the radio optical sensor means communicate information of light sensitivity to one another to optimize exposure.

7. An optical sensor unit according to claim 1, wherein:

the radio elements have different values with respect to at least one of an inductance and a capacitance for each radio element; and

the radio communication means transmits an electromagnetic wave having a different frequency to access each of the radio elements.

8. An optical sensor unit according to claim 1, wherein a digital modulation method selected from the group consisting of amplitude modulation, frequency modulation, and phase modulation is used as a method of imparting an instruction of a transmission request for the photographing information from the radio communication means to each of the radio elements.

9. An optical sensor array comprising:

a plurality of radio optical sensor means each including an optical sensor and a radio element for transmitting and receiving of an information through communication with the optical sensor to and from an outside by radio,

wherein an electromagnetic wave as a signal for requesting transmission of photographing information and an electromagnetic wave for supplying energy for photographing by the optical sensor and radio transmission and reception by the radio elements are received from the outside, and photographing information of a subject from the optical sensor is transmitted to the outside through the radio element.

10. A method of driving an optical sensor comprising:

arranging a plurality of radio optical sensor means independently of one another, which each include an optical sensor and a radio element for transmitting and receiving of an information through communication with the optical sensor to and from an outside by radio;

arranging radio communication means for transmitting and receiving an electromagnetic wave as a radio signal to and from the radio elements in a region apart from the radio elements;

transmitting from the radio communication means to each of the radio elements an electromagnetic wave as a signal for requesting transmission of photographing information and an electromagnetic wave for supplying energy for photographing by the optical sensor and radio transmission and reception by the radio elements; and

receiving from each of the radio optical sensor means the electromagnetic waves and transmitting the photographing information of a subject from the optical sensor to the radio communication means through the radio element.

11. A method of driving an optical sensor according to claim 10, further comprising:

arranging in the radio optical sensor means a plurality of position/direction detection elements for detecting positional information of the radio optical sensor means and directional information with respect to the subject and conducting communication to the radio elements, which are provided at different angles with respect to the subject;

transmitting from the radio optical sensor means photographed image information, the positional information, and the directional information to the subject to the radio communication means; and

synthesizing by the radio communication means images of the subject from the respective information to display the synthesized image.