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Follow-up distributed perturbation screen secondary speckle elimination device

A distributed and screen technology, applied in optical components, optics, instruments, etc., can solve the problems of serious light loss, complex structure, and high cost, and achieve the effects of low power consumption, small size, and simple structure

Active Publication Date: 2015-08-26
SHANXI OVISION OPTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of serious light loss, complex structure and high cost in existing devices for eliminating secondary speckle formed on the screen, the present invention provides a secondary speckle eliminating device for a follow-up distributed perturbation screen

Method used

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  • Follow-up distributed perturbation screen secondary speckle elimination device
  • Follow-up distributed perturbation screen secondary speckle elimination device
  • Follow-up distributed perturbation screen secondary speckle elimination device

Examples

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Embodiment Construction

[0019] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] A secondary speckle removal device for a follow-up distributed perturbation screen, including a screen 101, an excitation source 103 with periodic or random vibration is arranged at the center of the screen 101, or is uniformly distributed around the screen 101 or within an area There are a plurality of excitation sources 103 with periodic or random vibration, and the amplitude A≥0.05mm when the excitation source 103 vibrates randomly, or the frequency f≥10Hz and amplitude A≥0.05mm when the excitation source 103 vibrates periodically.

[0021] During specific implementation, springs 102 are evenly distributed around the screen 101 (such as figure 2 shown), the screen is fixed and tensioned on the bracket by the spring, or the curtain is fixed by other means.

[0022] The excitation sources 103 are uniformly distributed around the scre...

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Abstract

The invention relates to a speckle eliminating device, in particular to a follow-up distributed perturbation screen secondary speckle eliminating device, and solves a series of problems, such as serious optical loss, complex structure and high cost, of the conventional device for eliminating secondary speckles on a screen. The follow-up distributed perturbation screen secondary speckle eliminating device comprises a screen 101, wherein a vibration excitation source 103 with periodic or random vibration is arranged in the center of the screen 101, or a plurality of vibration excitation sources 103 with periodic or random vibration are uniformly distributed at the periphery or within the area of the screen 101; and the amplitude A of vibration of the vibration excitation source 103 during random vibration is greater than or equal to 0.05 mm, or the frequency f of the vibration excitation source 103 during periodic vibration is greater than or equal to 10 Hz and the amplitude A of vibration of the vibration excitation source 103 during periodic vibration is greater than or equal to 0.05 mm. The follow-up distributed perturbation screen secondary speckle eliminating device is reasonably designed and has a simple structure.

Description

technical field [0001] The invention relates to a speckle elimination device, in particular to a secondary speckle elimination device for a follow-up distributed perturbation screen. Background technique [0002] Due to the high brightness, good monochromaticity, and good directionality of the laser, it has incomparable advantages in the field of display and lighting, and can realize image display with rich colors, high contrast, and high lumens. However, due to the coherence of laser light, speckles appear after reflection from rough surfaces. The speckle phenomenon seriously affects the display of image information, resulting in a decrease in image quality, which has become a technical problem that must be overcome in the field of laser display. [0003] Traditional speckle elimination devices use methods such as multimode optical fiber transmission (US20050008290), rotating scattering sheets (EP0589179A1), and rotating scattering elements (EP0589179A1) to eliminate speck...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/48
Inventor 高文宏蔡力陈海洋赵鹏飞王艳红
Owner SHANXI OVISION OPTRONICS CO LTD
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