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Light beam rotary apparatus and method capable of compensating intensity variation caused by polarization

A technology of intensity change and polarization beam splitter prism, which is applied in the field of optics, can solve the problems that processing accuracy affects beam quality, reduces beam rotation accuracy, and is not easy to fluctuate in intensity, and achieves the effect of simple structure, easy control, and easy processing

Inactive Publication Date: 2009-03-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

However, the above-mentioned devices for realizing beam rotation have higher processing requirements. For example, the processing of Dove prisms requires the accuracy of two angular dimensions and one length dimension. The processing accuracy that can be achieved will seriously affect the quality of the beam, thereby reducing the beam rotation. the accuracy of
In addition, these prisms simultaneously change the intensity of the beam when they are rotated, and it is not easy to compensate for intensity fluctuations

Method used

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  • Light beam rotary apparatus and method capable of compensating intensity variation caused by polarization
  • Light beam rotary apparatus and method capable of compensating intensity variation caused by polarization

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Embodiment Construction

[0016] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0017] Such as figure 1 As shown, the device of the present invention includes a polarization splitter prism (1), a 1 / 4 wave plate (2), a birefringent wave plate (3) and a Porro prism (4). The transmission direction of the transmitted light of the polarization beam splitter prism (1) is located on the reference plane, and the polarization direction of the transmitted light is parallel to the reference plane; the direction of the fast axis of the 1 / 4 wave plate (2) and the normal direction of the reference plane are in the clip of π / 4 Angle; birefringent wave chip (3) and Porro prism (4) are coaxially solidified together, and the crystal axis of birefringent wave chip (3) is parallel to the right-angled edge of Porro prism, so that the light beam is parallel and perpendicular to Porro prism (4 ) The phase difference of the polarization compo...

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Abstract

The invention relates a beam rotating device with intensity changed by compensable polarization and a method, belonging to the field of optical technology. The device consists of a polarizing splitting prism, a 1 / 4 wave plate, a double refracted wave wafer and a porro prism. The invention adopts the revolving porro prism to realize the rotation of beams and adopts the double refracted wave wafer to compensate the porro prism, so as to eliminate the fluctuation of beam intensity caused by resolving the porro prism and further realize beam rotation without changing beam intensity. The invention has an application value in the field of optical information processing.

Description

technical field [0001] The invention relates to a light beam rotation device and method capable of compensating intensity changes caused by polarization. The invention belongs to the field of optical technology. Background technique [0002] The device for realizing beam rotation can rotate the beam with a certain light field distribution around the rotation axis to obtain its rotating mirror image. After the light beam passes through the rotating device, the light beam flipped odd times will rotate along with the rotation of the flip symmetry axis. Devices capable of rotating light beams mainly include Dove Prism, Pechan Prism, and K-type prism, among which Dove Prism is the most widely used. These prisms can realize the rotation of the beam without changing the transmission direction of the beam. Among them, the Dove prism can flip the beam 1 time, the Bechan prism can flip the beam 5 times, and the K-prism can flip the beam 3 times. However, the above-mentioned devices...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B26/08G02F1/29
Inventor 高春清刘义东高明伟齐晓庆
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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