Laser speckle suppression device and method
By splitting the laser source into N incoherent sub-beams of equal intensity and using a beam-splitting film array to achieve time delay, the spatial coherence of the laser is destroyed, thus solving the problem of poor speckle suppression in laser displays and improving light energy utilization and image quality.
CN116047783BActive Publication Date: 2026-07-21XIAN TECH UNIV
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Patent Information
- Application Number
- CN202310136854.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-02-20
- Publication Date
- 2026-07-21
- Estimated Expiration
- 2043-02-20
AI Technical Summary
Technical Problem
Existing technologies struggle to effectively suppress speckle in laser displays, resulting in decreased image quality and low light energy utilization.
Method used
By employing a method that disrupts spatial coherence, the laser source is divided into N incoherent sub-beams of equal intensity. A beam splitting film array is used to achieve a time delay greater than the coherence time, thereby disrupting the spatial coherence of the laser.
Benefits of technology
It significantly reduces speckle contrast to 1/N1/2 of the original, improves light energy utilization, and features a compact structure, low energy consumption, and long service life.
✦ Generated by Eureka AI based on patent content.
Abstract
The application discloses a kind of laser speckle suppression device and method, belong to optical technology field, by laser light source, collimating lens, half-transmission half-reflection mirror, light splitting film layer array, detector is formed, laser light source output coherent laser;Collimating lens is collimated after laser beam, again by half-transmission half-reflection mirror vertical injection light splitting film layer array;Light splitting film layer array will incident beam be divided into multiple non-coherent and light intensity equal sub-beam.The present application is static speckle suppression device, does not need power supply and drive, device structure is compact, small in size, low energy consumption, long service life;This device structure is simple, and the effect of speckle suppression is good, can be divided into N beam light intensity equal non-coherent light for laser beam, at most the speckle contrast of laser is reduced to 1 / N of original 1 / 2 .
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