A shim and decoherence device
A homogenizing sheet and lens barrel technology, applied in optical components, optics, instruments, etc., can solve the problems of optical waveguide breakage, disconnection, and inability to shimming the laser beam, and achieve the effect of avoiding pollution, compact and simple structure
Active Publication Date: 2017-10-27
HANGZHOU HONGSHI TECH
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[0035] In order to illustrate the present invention more clearly, the present invention will be further described below with reference to the preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.
[0036] like figure 1 A schematic diagram of the optical path of the field equalizing device of the present invention is shown. The equalizing device includes, for example, an optical fiber 101 arranged along the optical path, a front lens 102 , a light equalizing plate 103 , a rear lens 104 and an integrator rod 105 . The output port of the optical fiber 101 is located at the focal point of the front lens 102 . The laser light emitted through the optical fiber 101 usually has a certain divergence angle, and the laser l...
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The invention relates to a shimming and decoherence device. The shimming and decoherence device comprises a front lens for shaping the laser into parallel beams, a light homogenizing sheet for homogenizing the parallel beams and a light homogenizing sheet support for fixing the light homogenizing sheet. The light homogenizing sheet support comprises an inner annular support and an outer annular support, the light homogenizing sheet is fixedly arranged on the inner annular support, and the inner annular support is connected with the outer annular support by virtue of at least two elastic connecting parts which are uniformly separated. The outer side surface of the inner annular support is provided with at least one permanent magnet, an electromagnet corresponding to the permanent magnet is arranged outside the outer annular support, and the inner annular support makes vibrating movement in the outer annular support along with the variation of the adsorption force of the electromagnet as well as under the effect of the elastic force of the elastic connecting parts. By adopting the structure, the laser beam is homogenized by the light homogenizing sheet, due to the vibration of the light homogenizing sheet, the phase of the laser beam can be disturbed, so that the decoherence is realized, and the laser can be honogemized.
Description
technical field [0001] The present invention relates to the field of laser display. More specifically, it relates to a shimming and decoherence device. Background technique [0002] Laser has the advantages of high brightness, good monochromaticity and good directionality. Laser display technology is considered to be the development direction of next-generation display technology due to its advantages of large color gamut, long life and low energy consumption. The principle of laser display is that the RGB three-color laser goes through the steps of shaping, shimming, and decoherence, and then modulated by the light valve, enters the projection system, and projects onto the screen. Due to the high coherence of laser light, if the laser beam without decoherence treatment is directly projected, the viewer will see obvious bright spots with uneven brightness on the screen or in front of the screen, the so-called speckle. For high-brightness and rich-color laser image display...
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IPC IPC(8): G02B27/09G02B27/48
CPCG02B27/0938G02B27/0955G02B27/48
Inventor 王栋栋张文平孙敏远毕勇刘新厚王东周高伟男
Owner HANGZHOU HONGSHI TECH