Two-dimensional rangefinding sensor
First Claim
1. A two-dimensional rangefinding sensor, comprising:
- an illuminating device for projecting light beams which undergoes luminance modulation at a predetermined frequency for a predetermined duration with a predetermined cycle time, onto an object;
an image-formation optical system for forming an image of the object illuminated with light beams which have undergone the luminance modulation and have been projected from the illuminating device;
a two-dimensional image sensor mounted on an image-formation plane of the image-formation optical system,said two-dimensional image sensor including an electrode terminal for applying a signal for controlling the sensitivity of said two-dimensional image sensor;
a driving means for performing a modulation driving operation on the electrode terminal of the two-dimensional image sensor at said predetermined frequency; and
a reading means for extracting a signal corresponding to a signal charge generated in each of picture elements of the two-dimensional image sensor.
1 Assignment
0 Petitions
Accused Products
Abstract
A two-dimensional rangefinding sensor of the present invention consisting of an illuminating device for projecting light beams, which undergoes luminance modulation at a predetermined frequency for a predetermined duration with a predetermined cycle time, onto an object, an image-formation optical system for forming an image of the object illuminated with light beams which have undergone the luminance modulation and which have been projected from the illuminating device, a two-dimensional image sensor mounted on an image-formation plane of the image-formation optical system, a driving means for performing a modulation driving operation on an electrode terminal, which is operative to determine the sensitivity of the two-dimensional image sensor at the frequency, and a reading means for reading a signal corresponding to a signal charge generated in each of picture elements of the image sensors. Thereby, a range-data image of a three-dimensional object can be obtained by using a two-dimensional image sensor without mechanically scanning with illumination light.
70 Citations
9 Claims
-
1. A two-dimensional rangefinding sensor, comprising:
-
an illuminating device for projecting light beams which undergoes luminance modulation at a predetermined frequency for a predetermined duration with a predetermined cycle time, onto an object; an image-formation optical system for forming an image of the object illuminated with light beams which have undergone the luminance modulation and have been projected from the illuminating device; a two-dimensional image sensor mounted on an image-formation plane of the image-formation optical system, said two-dimensional image sensor including an electrode terminal for applying a signal for controlling the sensitivity of said two-dimensional image sensor; a driving means for performing a modulation driving operation on the electrode terminal of the two-dimensional image sensor at said predetermined frequency; and a reading means for extracting a signal corresponding to a signal charge generated in each of picture elements of the two-dimensional image sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A two-dimensional rangefinding sensor, comprising:
-
an illuminating device for projecting light beams which undergoes luminance modulation at a predetermined frequency for a predetermined duration with a predetermined cycle time, onto an object; an image-formation optical system for forming an image of the object illuminated with light beams which have undergone the luminance modulation and have been projected from the illuminating device; first and second two-dimensional image sensors for receiving a light beam representing an image of an object; a beam splitter for splitting an image-formation light beam obtained through image-formation optical system into light beams to be respectively sent to the first and second two-dimensional image sensors; a driving means for performing a modulation driving operation on an electrode terminal, which is operative to determine sensitivity of the first two-dimensional image sensor, at said predetermined frequency; and a reading means for taking out a signal corresponding to a signal charge generated by each of picture elements of the first and second two-dimensional image sensors.
-
-
9. A two-dimensional rangefinding sensor, comprising:
-
an illuminating device for projecting light beams, which undergoes luminance modulation at a predetermined frequency for predetermined duration with a predetermined cycle time, onto an object; an image-formation optical system for forming an image of the object illuminated with light beams which have undergone the luminance modulation and have been projected from the illuminating device; a two-dimensional CMD image sensor mounted on an image-formation plane of the image-formation optical system; a driving means for performing a modulation driving operation on a gate electrode terminal corresponding to each of a part of picture elements of the two-dimensional CMD image sensor at the frequency, among gate electrode terminals, which are operative to determine sensitivity of the picture elements of the two-dimensional CMD image sensor; and a reading means for taking out a signal corresponding to a signal charge generated by each of the picture elements of the two-dimensional CMD image sensor.
-
Specification