Dynamic phase acquiring device
First Claim
1. A dynamic phase acquisition device, comprising:
- a light collecting opening, a semi-reflecting and semi-transmitting mirror, a phase shifter, a polarizer, a plane reflector, a photosensing element and a phase processor;
wherein;
light passes through the light collecting opening to the semi-reflecting and semi-transmitting mirror, and is divided into two channels, one channel of the light sequentially passes through the phase shifter, the polarizer to the photosensing element, to form a first image;
the other channel of the light, after being reflected by the plane reflector, passes through the polarizer to the photosensing element, to form a second image;
the first and second images are formed at the same time;
pixels of the first image one-to-one correspond to pixels of the second image;
the photosensing element is connected with the phase processor;
the photosensing element sends the first image and the second image to the phase processor, and the phase processor obtains phase data; and
a leading or lagging phase shift range of the phase shifter is 1 degree to 20 degrees.
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Accused Products
Abstract
A dynamic phase acquisition device includes a light collecting opening, a semi-reflecting and semi-transmitting mirror, a phase shifter, a polarizer, a plane reflector, a photosensing element and a phase processor. In the dynamic phase acquisition device, light passes through the light collecting opening to the semi-reflecting and semi-transmitting mirror, and then is divided into two channels. One channel of the light sequentially passes through the phase shifter, the polarizer to the photosensing element, to form a first image; the other channel of the light, after being reflected by the plane reflector, directly passes through the polarizer to the photosensing element, to form a second image. The photosensing element sends the first image and the second image to the phase processor, and the phase processor obtains phase data; and a leading or lagging phase shift range of the phase shifter is 1 degree to 20 degrees. By using the phase shifter to provide a lead or a lag of a small amount of degrees, such as from 1 to 20 degrees, or even from 5 to 10 degrees, phase data can be obtained via two-path image detection, thus eliminating the need for optical elements for at least one path detection, and thereby simplifying the structure and reducing costs.
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Citations
5 Claims
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1. A dynamic phase acquisition device, comprising:
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a light collecting opening, a semi-reflecting and semi-transmitting mirror, a phase shifter, a polarizer, a plane reflector, a photosensing element and a phase processor; wherein; light passes through the light collecting opening to the semi-reflecting and semi-transmitting mirror, and is divided into two channels, one channel of the light sequentially passes through the phase shifter, the polarizer to the photosensing element, to form a first image;
the other channel of the light, after being reflected by the plane reflector, passes through the polarizer to the photosensing element, to form a second image;
the first and second images are formed at the same time;
pixels of the first image one-to-one correspond to pixels of the second image;the photosensing element is connected with the phase processor;
the photosensing element sends the first image and the second image to the phase processor, and the phase processor obtains phase data; anda leading or lagging phase shift range of the phase shifter is 1 degree to 20 degrees. - View Dependent Claims (2)
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3. A dynamic phase acquisition device, comprising:
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a first channel including a semi-reflecting and semi-transmitting mirror, a phase shifter, and a polarizer; a second channel including the semi-reflecting and semi-transmitting mirror, a reflector, and the polarizer; a photosensing element for receiving light from the first channel and the second channel and generating a first image and a second image at the same time; and a phase processor connected to the photosensing element for receiving the first image and second image and calculating phase data based on the received first image and second image. - View Dependent Claims (4, 5)
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Specification